ROOTECH ACCURA 7500 User Manual

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Page 2 PT fuses and shorting CT secondaries. Install the product in enclosures or a similar cabinet to prevent access to the terminal strips of the ◼ product after wiring. Page 2 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 3 -Barrier-type digital input and output ports: 0.90 N∙m (9 kgf∙cm = 0.66 lbf∙ft) max. About the Manual Rootech, Inc. reserves the right to make changes in the product specifications shown in this User Guide without prior notice. We recommend that customers should obtain the latest information on product specifications and the manual before making orders.
Page 4 Rootech will decide at its discretion whether to repair or replace it or give a refund for the product for when the warranty period for the product expired or issues related to the product are not applicable for warranty terms and conditions.
Page 5 Accura 7500 User Guide Warranty Rootech shall not be liable for any other claims except the claims made by customers, including the original purchaser, his employees, agents, or contractors for any loss, damage, or expense incurred related to the purchased product when the above warranty terms and conditions are not fulfilled.
Page 6 Revision History Accura 7500 User Guide Revision History The following versions of Accura 7500 User Guide have been released. Revision Date Description Revision 1.0 2006. 5. 02 Initial release Revision 1.1 2007. 3. 06 Revision Revision 1.2 2007. 7. 01 Wiring diagram changed Revision 1.3...
Page 7: Table Of Contents
Wiring Diagram Example (3P3W with 2 PTs and 2 CTs) ................45 Port Layout on the Rear Panel ........................46 Description of Rear Panel Ports......................... 47 Block Diagram ............................49 Chapter 4 Meter Operation/Setup ........................50 ⓒ 2006 Rootech Inc. All Rights Reserved Page 7...
Page 8 Definite-time OVR ........................... 89 Instantaneous OVR ..........................92 NSOVR Setup ..............................93 Definite-time NSOVR ..........................94 POR Setup ..............................97 Definite-time POR ........................... 98 UVR Setup ..............................101 Definite-time UVR ..........................102 Page 8 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 9 DO Control ..............................149 LCD Setup ..............................151 PT Fault Detection Function ........................... 154 CB Fault Detection ............................157 Disabling the Protection Function ........................160 Date and Time Setup ............................ 164 ⓒ 2006 Rootech Inc. All Rights Reserved Page 9...
Page 10 Appendix A Wiring Examples ......................... 199 3-Phase 4-Wire ............................199 3-Phase 3-Wire : 3 PTs & 2 CTs ........................200 3-Phase 3-Wire : Open-Delta, 2 CTs ......................201 Sequence Diagram ............................202 Page 10 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 11 Accura 7500 Guide Figures Figures Figure 3.1 Accura 7500 Front ........................37 Figure 3.2 Accura 7500 Rear ........................37 Figure 3.3 Accura 7500 Side ........................38 Figure 3.4 Assembly Structure ........................39 Figure 3.5 Panel Assembly Method ......................40 Figure 3.6 Panel Cutouts .......................... 40 Figure 3.7 Detachment of the Unit from the Chassis ..................
Page 12 Figure 6.22 Screen Asking Whether to Apply Changes ................85 Figure 6.23 Screen Notifying that Changes Have Been Made ..............85 Figure 6.24 Screen Notifying that Changes Have Been Undone ..............85 Figure 6.25 Definite-time OCGR Setup Screen ..................86 Page 12 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 13 Figure 6.47 Screen Notifying that Changes Have Been Made ..............100 Figure 6.48 Screen Notifying that Changes Have Been Undone ............... 100 Figure 6.49 Initial UVR Setup Screen ....................... 101 Figure 6.50 Definite-time UVR setup screen ..................... 102 ⓒ 2006 Rootech Inc. All Rights Reserved Page 13...
Page 14 Figure 6.73 Screen Asking Whether to Apply Changes ................118 Figure 6.74 Screen Notifying that Changes Have Been Made ..............118 Figure 6.75 Screen Notifying that Changes Have Been Undone ............... 118 Page 14 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 15 Figure 8.3 Screen Asking Whether to Change the Passcode With the Cursor Appearing Partially ....133 Figure 8.4 Passcode Entry Screen Showing the Cursor Appearing Partially ..........133 Figure 8.5 Passcode Mismatch Message Screen ..................134 ⓒ 2006 Rootech Inc. All Rights Reserved Page 15...
Page 16 Figure 8.28 Screen Asking Whether to Apply Changes ................148 Figure 8.29 Screen Notifying that Changes Have Been Made ..............148 Figure 8.30 Screen Notifying that Changes Have Been Undone ............... 148 Page 16 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 17 Figure 8.53 Status Where the Cursor Appears Partially and Changes Can be Made ........162 Figure 8.54 Status Where the ENTER Button Is Pressed after Changing Setup Items ........162 Figure 8.55 Screen Asking Whether to Apply Changes ................163 ⓒ 2006 Rootech Inc. All Rights Reserved Page 17...
Page 18 Figure 10.2 Definite-time UVR Setup Screen .................... 196 Figure 10.3 DIN Setup Screen ........................ 197 Figure 10.4 Input Setup Screen for CB Operation In the Event of Power Recovery ........197 Page 18 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 19: Chapter 1 Product Introduction
Easy Controls The metering functions of Accura 7500 can be controlled in the same way as those of other Accura meters such as Accura 3300/3500. Thus, it makes it possible for users to control it with ease. Data on protection relay functions are displayed on the LCD screen in Korean so that users can easily check related data and control the functions.
Page 20: Applications
Accura 7500 performs general feeder and motor protection for high-voltage consumers. Metering Function Available with a Protection Relay Accura 7500 is equipped with the functions of both power meters and protection relays. However, these functions are provided separately in terms of the device’s design and structure. Metering functions are available on the left side of the device while protection relay functions are available on the right side of the device.
Page 21: Product Features
Harmonics analysis K-Factor Power Supply AC 85 – 265 V, 50/60 Hz DC 100 – 300 V Power consumption 20 VA (maximum 25 VA) 1. The data are available via RS-485 communication. ⓒ 2006 Rootech Inc. All Rights Reserved Page 21...
Page 22: Chapter 2 Technical Specifications
Operation time accuracy The greater value between ±5 % of operating time based on 1.05 times the (Definite time) pickup level and 35 ms Operation time accuracy Within 50 ms (Instantaneous) Page 22 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 23 IEC(A, B, C), KEPCO(NI, VI) : 2 OCGR inverse time elements can be set Operation time accuracy The greater value between ±5 % of operating time based on 1.05 times the pickup level and 35 ms ⓒ 2006 Rootech Inc. All Rights Reserved Page 23...
Page 24 Operation time accuracy The greater value between ±5 % of operating time based on 1.05 times the (Definite time) pickup level and 35 ms Operation time accuracy Within 50 ms (Instantaneous time) Page 24 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 25 1.0 % of full scale Operation characteristic curve Definite time, Instantaneous : 3 UVR elements for various settings Operation time accuracy The greater value between ±5 % of operating time based on 1.05 times the ⓒ 2006 Rootech Inc. All Rights Reserved Page 25...
Page 26 97 % of pickup level Measurement accuracy 1.0 % of full scale Operation time accuracy The greater value between ±5 % of operation time based on 1.05 times the pickup level and 35 ms Page 26 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 27 97 % of pickup level Measurement accuracy 1.0 % of full scale Operation time accuracy The greater value between ±5 % of operation time based on 1.05 times the pickup level and 35 ms ⓒ 2006 Rootech Inc. All Rights Reserved Page 27...
Page 28 97 % of pickup level Phase-angle accuracy 5° Operation time accuracy The greater value between ±5 % of setting operation time and 35 ms at over 1.05 times of pickup level Page 28 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 29: Measurements
■ ■ ■ Energy Active ■ ■ Reactive ■ ■ Apparent ■ ■ Frequency ■ Power factor ■ ■ Voltage ■ Current ■ Demand Power ■ ■ ■ Current ■ ■ ⓒ 2006 Rootech Inc. All Rights Reserved Page 29...
Page 30: Measurement Test
31st ±0.3 % ±0.3 % 1. Tested percentages of harmonic-to-fundamental: 50 % of the rated voltage (220 V) 2. Tested percentages of harmonic-to-fundamental: 50 % of the rated current (5 A) Page 30 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 31: Device Reliability Test
0(0 %) – 77(70 %) / 0.01 – 0.5 s, 0(0 %) – 77(70 %) each polarity / 0.01 – 0.5 s, each polarity IEC 61000-4-18 1 MHz Burst Disturbance Test 2.5 kV/1 kV common/differential 2.5 kV/1 kV ⓒ 2006 Rootech Inc. All Rights Reserved Page 31...
Page 32: Control
Change to remote Accura 7500 is operated in a remote mode and the mode is kept regardless of the mode operations of Remote and Local keys on the front panel.
Page 33: Input & Output
AC 250 V/25 A, DC 30 V/15 A resistive load 4,000 VA, 480 W Rating (Alarm, Auxiliary contactor) AC 250 V/5 A, DC 30 V/5 A resistive load 1,250 VA, 150 W ⓒ 2006 Rootech Inc. All Rights Reserved Page 33...
Page 34: Communication
Control Key Item Description Type Meter: MENU, △, ▽, ENTER Relay: CB ON, CB OFF, ESC, △, ▽, ENTER, Remote, Local, Fault Reset, Record, Status, Setup, relay selection key x 7 Page 34 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 35: Additional Features
Surge Immunity IEC 61000-4-6 Conducted RF Immunity IEC 61000-4-8 Rated Power Frequency Magnetic Field IEC 61000-4-11 Voltage Dip/Short Interruptions IEC 61000-4-18 1 MHz Burst Disturbance Certifications General Warranty period 2 years ⓒ 2006 Rootech Inc. All Rights Reserved Page 35...
Page 36: Chapter 3 Product Installation
Up to 2,000 m Caution Accura 7500 should be installed in a switchboard cabinet or similar enclosure in order to block user access to its terminal after installing the product. Accura 7500 should be installed at locations where there are no pollutants such as dust, oil and corrosive gases.
Page 39: Step 1: Panel Mounting
So the Accura 7500 can be assembled with the panel as shown in Figure 3.5. Figure 3.6 is a panel cutout drawing.
Page 40: Figure 3.5 Panel Assembly Method
Chapter 3 Product Installataion Accura 7500 User Guide Figure 3.5 Panel Assembly Method Figure 3.6 Panel Cutouts Page 40 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 41: Detachment And Assembly Of The Unit For Repair
If they are not pressed any more, then it means the unit and the chassis are completely fastened together. Incomplete combination can cause inaccurate detection of current or problems in the digital input and output functions. ⓒ 2006 Rootech Inc. All Rights Reserved Page 41...
Page 42: Step 2: External Wiring
Chapter 3 Product Installataion Accura 7500 User Guide Step 2: External Wiring Unlike general multi-function relays, Accura 7500 is equipped with a metering CT and a protection CT for accurate measurements. Thus, special caution is required when wiring CTs. Note Each of Protective Earth (PE) and Frame Ground (FG) must be one-point-earthed to the switchboard.
Page 43: Wiring Diagram Example (3P4W With 3 Pts And 3Cts)
Accura 7500 User Guide Chapter 3 Product Installataion Wiring Diagram Example (3P4W with 3 PTs and 3CTs) Figure 3.8 Wiring Diagram(3P4W with 3 PTs and 3 CTs) ⓒ 2006 Rootech Inc. All Rights Reserved Page 43...
Page 44: Wiring Diagram Example (3P3W With 3 Pts And 3 Cts)
Chapter 3 Product Installataion Accura 7500 User Guide Wiring Diagram Example (3P3W with 3 PTs and 3 CTs) Figure 3.9 Wiring Diagram (3P3W with 3 PTs and 3 CTs) Page 44 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 45: Wiring Diagram Example (3P3W With 2 Pts And 2 Cts)
Accura 7500 User Guide Chapter 3 Product Installataion Wiring Diagram Example (3P3W with 2 PTs and 2 CTs) Figure 3.10 Wiring Diagram (3P3W with 2 PTs and 2 CTs: 3P3O) ⓒ 2006 Rootech Inc. All Rights Reserved Page 45...
Page 46: Port Layout On The Rear Panel
Chapter 3 Product Installataion Accura 7500 User Guide Port Layout on the Rear Panel Figure 3.11 Rear Panel Port Layout Diagram Page 46 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 47: Description Of Rear Panel Ports
250 Vac, 5 A Aux. DO 1 (A1), DO (A2) Aux. DO 2 (A3), DO (A4) Aux. DO 3 (A5), DO (A6) Aux. DO 4 (A7), DO (A8) Aux. DO 5 (A9), DO (A10) ⓒ 2006 Rootech Inc. All Rights Reserved Page 47...
Page 48 (D8) DI 6 (D9), DI (D14) DI 7 (D10), DI (D15) DI 8 (D11), DI (D16) DI 9 (D12), DI (D17) DI 10 (D13), DI (D17) Communication Ports Ta(D18), Tb(D19), TG(D20) Page 48 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 50: Chapter 4 Meter Operation/Setup
Accura 7500 User Guide Chapter 4 Meter Operation/Setup As shown in Figure 4.1, Accura 7500’s meter part and protection relay part are completely separated both in functions and structure. The left-hand side is the meter part, and the right-hand side is the protection relay part.
Page 51: Display Mode
The display mode has various measurement groups as shown in Figure 4.2. Figure 4.2 Display Group Group A Group B Group C Group E Group D Measurement Group Parameter , kW, kVAR, kVA, PF FUND DMD, MAX, MIN kWh, kVARh, kVAh, Hz ⓒ 2006 Rootech Inc. All Rights Reserved Page 51...
Page 52 √ √ (phase-to-phase voltage) current √ √ current(fundamental harmonics) √ √ FUND active power √ √ kVAR reactive power √ √ apparent power √ √ power factor √ √ Page 52 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 53 √ DMD, MAX max demand current √ DMD, MAX max power demand √ √ kVAR DMD, MAX max reactive power demand √ √ DMD, MAX max apparent power demand √ √ ⓒ 2006 Rootech Inc. All Rights Reserved Page 53...
Page 55: Setup Mode
Note In the menu edit mode, pressing button lets users exit the menu edit mode and move to the display mode without saving the set value of the changed menu item. ⓒ 2006 Rootech Inc. All Rights Reserved Page 55...
Page 56 2. At 38,400 bps, PC(Master) receives data acknowledgement from the meter first, and then the request packet for the next data is sent after at least 17 ms passes. Also, in case of writing multiple registers, the size is limited to 13 words or less. Page 56 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 57: Reset Mode
Second Enter: returns to the reset mode after resetting the menu item Exits the reset mode and moves to the display mode Menu Items Order Menu Item Resets energy(kWh, kVARh, kVAh) values Resets demand(all demand, Peak demand) values Resets all max/min values ⓒ 2006 Rootech Inc. All Rights Reserved Page 57...
Page 58: System Mode
Note In the menu edit mode, pressing button lets users exit the menu edit mode and move to the display mode without saving the set value of the changed menu item. Page 58 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 59: Reactive Power Calculation
Reactive Power Calculation Rootech supports two kinds of methods for accurate calculation of reactive power. Method 1: General Calculation Directly measures the reactive power and measures the apparent power using the vector method for calculation of apparent power.
Page 60: Figure 4.3 Power Signs
Chapter 4 Meter Operation/Setup Accura 7500 User Guide PF =  The signs denoted by the phase angles of voltage and current are as follows. Figure 4.3 Power Signs Page 60 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 62    arms arms PF = Note According to the calculation method above, the value of P can be positive or negative. However, the value of Q is always positive. Page 62 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 63: Chapter 5 Operating The Protection Relay
Chapter 5 Operating the Protection Relay As shown in Figure 5.1, Accura 7500’s meter part and the protection relay part are completely separated both in functions and structure. The left-hand side is the meter part and the right-hand side is the protection relay part.
Page 64: Led Indicators
LEDs of the protection relay elements are turned on but also the A, B, C, and G LEDs are turned on so that users can easily find out fault situations. Page 64 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 65: Button Control
Moves to the setup menu that enables users to check and change the setup parameters required for the operation of Accura 7500’s protection relay functions such as DIO, time and LCD in addition to the basic setup parameters of 7 protection relay elements Table 5.4 Circuit Breaker(CB) Control Function Buttons...
Page 66: Unlocking The Device
When pressing the button that requires users to unlock the device, the passcode input screen appears as shown in Figure 5.2. When the passcode input screen first appears, the value hidden is 「0 0 0 0」 and Page 66 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 67: Figure 5.2 Passcode Input Screen
The device gets locked again if there’s no button input for more than the set time (Setup > LCD > BL On Time) and the LCD backlight is also turned off. The method of changing the passcode to another number is explained in Chapter 8. ⓒ 2006 Rootech Inc. All Rights Reserved Page 67...
Page 68: Lcd Display And Changing Setup Values
ENTER button must be pressed to apply the changed value and make the cursor appear in a row. After moving to another row by using the △, ▽ keys, the setup values of another row can be changed in the same way. Page 68 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 69: Figure 5.5 Inverse-Time Ocr Setup Screen
The screens as shown in Figure 5.9 and Figure 5.10 are displayed for only 2 seconds and disappear, and then the upper menu screen appears. ⓒ 2006 Rootech Inc. All Rights Reserved Page 69...
Page 70: Figure 5.8 Screen Asking Whether To Apply Changes
Chapter 5 Operating the Protection Relay Accura 7500 User Guide Figure 5.8 Screen Asking Whether to Apply Changes Figure 5.9 Screen Notifying that Changes Have Been Made Figure 5.10 Screen Notifying that Changes Have Been Undone Page 70 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 71: Chapter 6 Protection Relay Setup And Analysis Of Faults
Display Protection Relay Refer to the characteristics of protection relays of Accura 7500 to set up protection relay elements. The characteristics of protection relays are explained in 「Chapter 9 Characteristics of Protection Relay」. To change setup values, the current passcode must be entered when the passcode input screen appears.
Page 72: Ocr Setup
(The DOUT contactor set via 「Setup > DO with relay > OCR」 menus) so that the protection relay function can be tested while it is mounted on live wires. Page 72 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 73: Inverse-Time Ocr
Figure 6.4. Then, the setup values can be changed by using △, ▽ keys. For 「OCR Inv.」 or 「Curve」 items, the selected setup item can be changed, and for 「Pickup」 or 「TD」 items, the setup value can be increased or decreased. ⓒ 2006 Rootech Inc. All Rights Reserved Page 73...
Page 74: Figure 6.4 Status Where The Cursor Appears Partially And Changes Can Be Made
「Setup Completed!」 message appears for 2 seconds as shown in Figure 6.7. If 「Cancel」 is selected with the ENTER button, the setup value returns to the value before making the change, showing 「Setup Cancelled!」message for 2 seconds as shown in Figure 6.8, without changing the value. Page 74 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 75 Chapter 6 Protection Relay Setup and Analysis of Faults Figure 6.6 Screen Asking Whether to Apply Changes Figure 6.7 Screen Notifying that Changes Have Been Made Figure 6.8 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 75...
Page 76: Instantaneous Ocr
It can be set up to the time between 0.05 – 60.00 s in steps of 0.01 s. For the instantaneous and inverse-time OCRs, each setup item can be changed in the same way. Page 76 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 77: Nsocr Setup
(The DOUT contactor set via 「Setup > DO with relay > NSOCR」 menus) so that the protection relay function can be tested while it is mounted on switchboard and in operation. ⓒ 2006 Rootech Inc. All Rights Reserved Page 77...
Page 78: Inverse-Time Nsocr
The setup value can be changed by using △, ▽ keys. For 「NSOCR Inv」 or 「Curve」 items, the selected setup items can be changed, and for 「Pickup」 or 「TD」 items, the setup values can be increased or decreased. Page 78 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 79: Figure 6.12 Status Where The Cursor Appears Partially And Changes Can Be Made
Figure 6.15. If 「Cancel」 is selected with the ENTER button, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.16, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 79...
Page 80: Figure 6.14 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.14 Screen Asking Whether to Apply Changes Figure 6.15 Screen Notifying that Changes Have Been Made Figure 6.16 Screen Notifying that Changes Have Been Undone Page 80 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 81: Instantaneous Nsocr
It can be set up to the time between 0.05 – 60.00 s in steps of 0.01 s. For the instantaneous and inverse time NSOCRs, setup items can be changed in the same way. ⓒ 2006 Rootech Inc. All Rights Reserved Page 81...
Page 82: Ocgr Setup
If inverse time OCGR is selected by pressing the ENTER button, the inverse time OCGR setup screen as shown in Figure 6.19 appears. The setup content in each row is explained in Table 6.8. Page 82 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 83: Figure 6.19 Inverse-Time Ocgr Setup Screen
The setup values can be changed by using △, ▽ keys. For 「OCGR Inv.n」 or 「Curve」 items, the selected setup items can be changed, and for 「Pickup」 or 「TD」 items, the setup values number can be increased or decreased. ⓒ 2006 Rootech Inc. All Rights Reserved Page 83...
Page 84: Figure 6.20 Status Where The Cursor Appears Partially And Changes Can Be Made
ENTER button, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.24, without changing the value. Page 84 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 85: Figure 6.22 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Figure 6.22 Screen Asking Whether to Apply Changes Figure 6.23 Screen Notifying that Changes Have Been Made Figure 6.24 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 85...
Page 86: Definite-Time Ocgr
The value can be changed in steps of 0.01 second and set to a value between 0.05 – 60.00 seconds. For definite-time and inverse-time OCGRs, setup items can be changed in the same way. Page 86 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 87: Instantaneous Ocgr
The value can be changed in steps of 0.1 A and set to a value between 2.0 – 50.0 A. The instantaneous relay operates within 50 ms after a fault occurs. For inverse-time and instantaneous OCGRs, setup items can be changed in the same way. ⓒ 2006 Rootech Inc. All Rights Reserved Page 87...
Page 88: Ovr Setup
(The DOUT contactor set via 「Setup > DO with relay > OVR」 menus) so that the protection relay function can be tested while it is mounted on live wires. Page 88 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 89: Definite-Time Ovr
Setup values can be changed by using △, ▽ keys. For 「OVR Def.」 item, the selected setup item can be changed, and for 「Pickup」 or 「Delay」 items, the setup value can be increased or decreased. ⓒ 2006 Rootech Inc. All Rights Reserved Page 89...
Page 90: Figure 6.29 Status Where The Cursor Appears Partially And Changes Can Be Made
ENTER button, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as in Figure 6.33, without changing the value. Page 90 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 91: Figure 6.31 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Figure 6.31 Screen Asking Whether to Apply Changes Figure 6.32 Screen Notifying that Changes Have Been Made Figure 6.33 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 91...
Page 92: Instantaneous Ovr
There is no delay time setup item since the instantaneous relay operates within 50 ms after a fault occurs. For the instantaneous and definite time OVRs, setup items can be changed in the same way. Page 92 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 93: Nsovr Setup
Figure 6.35. Users can check the setup status of the relay’s definite time characteristic. The Accura 7500 provides only definite time characteristics for the NSOVR. Figure 6.35 Initial NSOVR Setup Screen The meanings of 「OFF」, 「Trip」, 「Alarm」, 「T&A」...
Page 94: Definite-Time Nsovr
Here, Setup values can be changed by using △, ▽ keys. For 「NSOVR Def」 or 「Rotation」 item, the selected setup item can be changed, and for 「Pickup」 or 「Delay」 items, the setup value can be increased or decreased. Page 94 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 95: Figure 6.37 Status Where The Cursor Appears Partially And Changes Can Be Made
Figure 6.40. If 「Cancel」 is selected with the ENTER key, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as in Figure 6.41, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 95...
Page 96: Figure 6.39 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.39 Screen Asking Whether to Apply Changes Figure 6.40 Screen Notifying that Changes Have Been Made Figure 6.41 Screen Notifying that Changes Have Been Undone Page 96 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 97: Por Setup
POR Setup When the POR button is pressed, the initial POR setup screen appears as shown in Figure 6.42. It shows the setup status of the POR’s definite time characteristics. Accura 7500 provides only definite time characteristics for the POR.
Page 98: Definite-Time Por
Here, the setup value can be changed by using △, ▽ keys. For 「POR Def.」 item, the selected setup value is changed, and for 「Pickup」 or 「Delay」 items, the setup value of the number is increased or decreased. Page 98 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 99: Figure 6.44 Status Where The Cursor Appears Partially And Changes Can Be Made
ENTER key, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.48, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 99...
Page 100: Figure 6.46 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.46 Screen Asking Whether to Apply Changes Figure 6.47 Screen Notifying that Changes Have Been Made Figure 6.48 Screen Notifying that Changes Have Been Undone Page 100 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 101: Uvr Setup
When the UVR button is pressed, the initial UVR setup screen appears as shown in Figure 6.49. It shows the setup status of the UVR’s definite time and instantaneous characteristics. Accura 7500 provides only definite-time characteristics for the UVR. However, when the delay time is set to 0.05 seconds, the instantaneous relay operates and 3 definite time characteristics can be provided,.
Page 102: Definite-Time Uvr
1 second and set to a value between 1 – 600 seconds. To change each setup item, move the cursor to the corresponding row with △, ▽ keys and press the Page 102 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 103: Figure 6.51 Status Where The Cursor Appears Partially And Changes Can Be Made
「Setup Completed!」 for 2 seconds as in Figure 6.54. If 「Cancel」 is selected with the ENTER key, it returns to the value before the change, showing 「Setup Cancelled!」 for 2 seconds as in Figure 6.55, and doesn’t do initialization. Figure 6.53 Screen Asking Whether to Apply Changes ⓒ 2006 Rootech Inc. All Rights Reserved Page 103...
Page 104: Figure 6.54 Screen Notifying That Changes Have Been Made
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.54 Screen Notifying that Changes Have Been Made Figure 6.55 Screen Notifying that Changes Have Been Undone Page 104 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 105: Etc. Setup Of The Uvr
CB_ON (OR): The UVR operates if the CB is in ON status and undervoltage occurs to any one of three phases. CB_ON (AND): The UVR operates if the CB is in ON status and undervoltage occurs to all of the three phases. ⓒ 2006 Rootech Inc. All Rights Reserved Page 105...
Page 106: Motor Protection Elements Setup
Figure 6.57. It shows the setup status of the characteristics of motor protection elements. In addition to NSOCR and NSOVR, the Accura 7500 provides THR, lock, motor start and undercurrent protection features. Since there are mutually related setup items between protection elements, appropriate values should be set for each setup item.
Page 107: Thr
This refers Previous Load Current, which is a factor to reduce the operating time compared to the Cold Curve. The larger the setup value is, the more sensitive the properties are. ⓒ 2006 Rootech Inc. All Rights Reserved Page 107...
Page 108: Figure 6.60 Status Where The Cursor Appears Partially And Changes Can Be Made
Pressing the ENTER key makes the cursor appear in the line after applying the changed value as shown in figure 6.61. Page 108 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 109: Figure 6.61 Status Where The Enter Button Is Pressed After Changing Setup Items
Figure 6.64. On the other hand, when 「Cancel」 is selected by the ESC key, the setup value returns to the value before making the change. It shows 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.65 without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 109...
Page 110: Figure 6.63 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.63 Screen Asking Whether to Apply Changes Figure 6.64 Screen Notifying that Changes Have Been Made Figure 6.65 Screen Notifying that Changes Have Been Undone Page 110 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 111: Lock
The value can be set to a value between 0.05 – 60.00 seconds and changed in steps of 0.01. The method of changing each setup item is the same as described in the THR section. ⓒ 2006 Rootech Inc. All Rights Reserved Page 111...
Page 112: Motor Starting
If this item is set to 「Y」, the 「51L」 function will not work in the section that is judged to be running according to the value set in 「LSR」. If set to 「N」, the 「51L」 and 「LSR」 protection elements are not correlated. Page 112 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 113 Since this function is not a function through accurate verification of various motors, it should be applied only when it is necessary in the field The method of changing each setup item is the same as described in the THR section. ⓒ 2006 Rootech Inc. All Rights Reserved Page 113...
Page 114: Undercurrent
If 「CB」 is selected, it is always monitored when CB status is As setup items, 「Current」 or 「CB」 can be selected. The method of changing each item is the same as described in the THR section. Page 114 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 115: Ovgr Setup
When the OVGR key is pressed, the OVGR setup initial screen appears immediately as in Figure 6.69. It shows what status definite time and instantaneous time characteristic is already set to. Accura 7500 provides only definite time and instantaneous time characteristic for OVGR.
Page 116: Definite-Time Ovgr
Setup values can be changed by using △, ▽ keys. For operation status, the set item can be changed, and for taps or delay time items, the set value can be increased or decreased. Page 116 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 117: Figure 6.71 Status Where The Cursor Appears Partially And Changes Can Be Made
ENTER key, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.75, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 117...
Page 118: Figure 6.73 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Accura 7500 User Guide Figure 6.73 Screen Asking Whether to Apply Changes Figure 6.74 Screen Notifying that Changes Have Been Made Figure 6.75 Screen Notifying that Changes Have Been Undone Page 118 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 119: Instantaneous Ovgr
There is no delay time setup item since the instantaneous relay operates within 50 ms after a fault occurs. The method of changing the setup value for each item is the same as described in the definite time OVGR section. ⓒ 2006 Rootech Inc. All Rights Reserved Page 119...
Page 120: Sgr Setup
When the SGR key is pressed, the initial SGR setup screen appears as shown in Figure 6.77. It shows the setup status of the SGR. Accura 7500 provides only definite-time characteristics for the SGR. Figure 6.77 Initial SGR Setup Screen The meanings of 「OFF」, 「Trip」, 「Alarm」, 「T&A」...
Page 121: Definite-Time Sgr
In this case, the general setup value is 38° lead. On the other hand, since the reference voltage of Accura 7500 is Vo, the MTA setup value should be set to at 38° + 180° = 218°.
Page 122: Figure 6.79 Status Where The Cursor Appears Partially And Changes Can Be Made
ENTER key, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds as shown in Figure 6.83, without changing the value. Page 122 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 123: Figure 6.81 Screen Asking Whether To Apply Changes
Chapter 6 Protection Relay Setup and Analysis of Faults Figure 6.81 Screen Asking Whether to Apply Changes Figure 6.82 Screen Notifying that Changes Have Been Made Figure 6.83 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 123...
Page 124: Fault Reset
Figure 6.85. Users can keep checking past records by continuously pressing the ▽ key and view more recent records by pressing the △ key. To return to the most recent record at once from past records, press the Record key. Page 124 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 125: Figure 6.85 Screen With Event Record Number Decreased By 1 Compared To The Previous Screen
Figure 6.86 Screen Appearing after Pressing the ENTER Button On the Event Record Screen Figure 6.87 Screen Appearing when Using the ▽ Button On the Event Record Screen The data shown above can be downloaded to a PC through serial communications for analysis. ⓒ 2006 Rootech Inc. All Rights Reserved Page 125...
Page 126: Chapter 7 Checking The Status Of Relays
10 DO channels. The status of the Digital Output to which the ON command is sent via the contactor is displayed as 「Closed」. However, the status of the Digital Output to Page 126 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 127: Voltage
Va2 and Va0 are symmetrical coordinates internally calculated from the phase voltage(Phase-to-neutral voltage), representing the positive sequence, negative sequence and zero sequence voltages. Vamax, Vbmax, Vcmax and Vgmax are the maximum voltage values. ⓒ 2006 Rootech Inc. All Rights Reserved Page 127...
Page 128: Current
Figure 7.1, the DI status display screen appears as shown in Figure 7.4. The screen shows only four items at once, but you can also view other measurement values viewed by moving the cursor down with the ▽ key. Page 128 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 129: Do Status
The DO status display screen shows the current status where commands are issued to 10 DO channels. If the contactor to which an On command is issued, it is displayed as 「Closed」, and if the contactor to which an Off command is issued, it is displayed as 「Open」. ⓒ 2006 Rootech Inc. All Rights Reserved Page 129...
Page 130: Event Record
To view event records, press the Record button on the product’s front panel. For details, refer to 「Chapter 6 Setup and Analysis of Protection Relays > Record (Event Record)」. Page 130 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 132: Chapter 8 General Setup Of Relay Functions
OCGR for a certain period of time when the circuit breaker is closed and in operation. Date Setup Sets the date and time DO with DI Sets the function to control the DO set in conjunction with DI input status Page 132 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 133: Passcode
「Passcode」 in the second row as shown in Figure 8.4. Enter the current passcode there. Figure 8.3 Screen Asking Whether to Change the Passcode With the Cursor Appearing Partially Figure 8.4 Passcode Entry Screen Showing the Cursor Appearing Partially ⓒ 2006 Rootech Inc. All Rights Reserved Page 133...
Page 134: Figure 8.5 Passcode Mismatch Message Screen
“Passcode Change Cancelled!” appears for 2 seconds and the existing passcode will be maintained. And then the upper menu screen appears in 2 seconds. Figure 8.6 Passcode Change Completed! Message Screen Page 134 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 135: Record Deletion
「N」 as shown in Figure 8.8. Here, the deletion item can be selected by choosing 「Y」 or 「N」 with △, ▽ buttons. 「Y」 means deleting(resetting) the selected item and 「N」 means not deleting(resetting) it. ⓒ 2006 Rootech Inc. All Rights Reserved Page 135...
Page 136: Figure 8.8 Status Where Resetting Menu Items Can Be Performed
Figure 8.12, and the record is not deleted(reset). If the 「All Record」 item is set to 「Y」 and 「Save」 is selected with the ENTER button, all the three items above are deleted(reset). Page 136 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 137: Figure 8.10 Screen Asking Whether To Apply Setup Data
Chapter 8 General Setup of Relay Functions Figure 8.10 Screen Asking Whether to Apply Setup Data Figure 8.11 Screen Notifying that Changes Have Been Made Figure 8.12 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 137...
Page 138: Din Setup
Remote Mode Setup range can be selected among None and DIN1 – DIN10. If an input is applied to the set digital channel, Accura 7500 operates in remote status. In Page 138 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 139: Figure 8.14 Status Where Changes Can Be Made With The Cursor Appearing Partially
Figure 8.14 Status Where Changes Can be Made with the Cursor Appearing Partially ⓒ 2006 Rootech Inc. All Rights Reserved Page 139...
Page 140: Figure 8.15 Status Where The Enter Key Is Pressed After Changing Setup Items
Cancelled!」 message for 2 seconds, as shown in Figure 8.18, without changing the value. Figure 8.16 Screen Asking Whether to Apply Changes Figure 8.17 Screen Notifying that Changes Have Been Made Page 140 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 141: Do Setup
Figure 8.18 Screen Notifying that Changes Have Been Undone DO Setup Accura 7500 has 10 auxiliary contacts, 1 alarm contact, and 2 circuit breaker ON/OFF contacts, and each contact can be set separately. To set DOs (Digital Output), press the ENTER button when the cursor is in the fourth row on the initial setup screen as shown in Figure 8.1.
Page 142 Figure 8.20. Setup values can be changed by using △, ▽ keys. For 「DOx T」 item, the selected setup item is changed, and for 「DOx D」, the setup value is increased or decreased. Page 142 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 143: Figure 8.20 Status Where The Cursor Appears Partially And Changes Can Be Made
「Setup Completed!」 message appears for 2 seconds as shown in Figure 8.23. If 「Cancel」 is selected with the ENTER key, it returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.24, and doesn’t do initialization ⓒ 2006 Rootech Inc. All Rights Reserved Page 143...
Page 144: Figure 8.22 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Accura 7500 User Guide Figure 8.22 Screen Asking Whether to Apply Changes Figure 8.23 Screen Notifying that Changes Have Been Made Figure 8.24 Screen Notifying that Changes Have Been Undone Page 144 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 145: Dos Associated With Relays
DO with Relay setup screen appears as shown in Figure 8.25. The setup content of each row is explained in Table 8.5. Figure 8.25 Setup Screen for DOs Associated with Relays ⓒ 2006 Rootech Inc. All Rights Reserved Page 145...
Page 146 Outputs the signal according to the value set to DOx in the local mode. Setup items can be selected among None and DO1 – DO10. CBON Outputs the signal according to the value set to DOx when the CB ON command is issued Page 146 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 147: Figure 8.26 Status Where The Cursor Appears Partially And Changes Can Be Made
If 「Cancel」 is selected with the ENTER key, the setup value returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.30, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 147...
Page 148: Figure 8.28 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Accura 7500 User Guide Figure 8.28 Screen Asking Whether to Apply Changes Figure 8.29 Screen Notifying that Changes Have Been Made Figure 8.30 Screen Notifying that Changes Have Been Undone Page 148 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 149: Do Control
Chapter 8 General Setup of Relay Functions DO Control Accura 7500 has 10 auxiliary contacts, 1 alarm contact and 2 circuit breaker ON/OFF contacts. Since the circuit breaker can be controlled with CB ON and CB OFF buttons on the front panel, users can control the alarm contact and 10 auxiliary output contacts using this menu.
Page 150: Figure 8.32 Status Where The Cursor Appears Partially And Changes Can Be Made
Press the ENTER key, and the cursor appears in the line after applying the changed value as shown in Figure 8.33. Then, the control command is executed immediately according to the changed settings. Page 150 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 151: Lcd Setup
Accura 7500 has the background screen that enables users to view data on the screen even after the backlight is turned off. Also this time is the same as the time during which the device is unlocked.
Page 152: Figure 8.35 Status Where The Cursor Appears Partially And Changes Can Be Made
「Setup Completed!」 message appears for 2 seconds as shown in Figure 8.38. If 「Cancel」 is selected with the ENTER key, it returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.39, without changing the value. Page 152 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 153: Figure 8.37 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Figure 8.37 Screen Asking Whether to Apply Changes Figure 8.38 Screen Notifying that Changes Have Been Made Figure 8.39 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 153...
Page 154: Pt Fault Detection Function
Even when a PT fuse is cut off, it can cause the UVR to operate, resulting in a blackout. If this function is enabled, it can help prevent an unintended blackout. Rotation Setup items can be selected between 「ABC」 and 「ACB」. Page 154 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 155: Figure 8.41 Status Where The Cursor Appears Partially And Changes Can Be Made
If 「Cancel」 is selected with the ENTER key, it returns to the value before the making change, showing 「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.45, without changing the value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 155...
Page 156: Figure 8.43 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Accura 7500 User Guide Figure 8.43 Screen Asking Whether to Apply Changes Figure 8.44 Screen Notifying that Changes Have Been Made Figure 8.45 Screen Notifying that Changes Have Been Undone Page 156 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 157: Cb Fault Detection
△, ▽ keys. For 「Pickup」 or 「Delay」 items, the setup value can be increased or decreased, and for 「Function」 or 「Aux Contact」 items, the selected setup item can be changed. ⓒ 2006 Rootech Inc. All Rights Reserved Page 157...
Page 158: Figure 8.47 Status Where The Cursor Appears Partially And Changes Can Be Made
「Cancel」 is selected with the ENTER key, it returns to the value before making the change, showing 「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.51, without changing the value. Page 158 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 159: Figure 8.49 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Figure 8.49 Screen Asking Whether to Apply Changes Figure 8.50 Screen Notifying that Changes Have Been Made Figure 8.51 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 159...
Page 160: Disabling The Protection Function
Figure 8.1. If the function is selected with ENTER key, the protection function setup screen appears as shown in Figure 8.52. The setup item in each row is explained in Table 8.10. Figure 8.52 Protection Function Setup Item Page 160 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 161 Figure 8.53. The setup value can be changed by using △, ▽ keys. For the 「Delay」 item, the setup value can be increased or decreased, and for the 「Function」 item, the selected setup item can be changed. ⓒ 2006 Rootech Inc. All Rights Reserved Page 161...
Page 162: Figure 8.53 Status Where The Cursor Appears Partially And Changes Can Be Made
「Setup Completed!」 message appears for 2 seconds as shown in Figure 8.56. If 「Cancel」 is selected with the ENTER key, it returns to the value before making the change, showing 「Setup Cancelled!」 for 2 seconds, as in Figure 8.57, without changing the value. Page 162 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 163: Figure 8.55 Screen Asking Whether To Apply Changes
Chapter 8 General Setup of Relay Functions Figure 8.55 Screen Asking Whether to Apply Changes Figure 8.56 Screen Notifying that Changes Have Been Made Figure 8.57 Screen Notifying that Changes Have Been Undone ⓒ 2006 Rootech Inc. All Rights Reserved Page 163...
Page 164: Date And Time Setup
To set the date, move the cursor to the third row by using △, ▽ keys and press the ENTER key. Then the cursor will appear on the last digit of the new date as shown in Figure Page 164 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 165: Figure 8.59 Status Where The Cursor Appears Partially And Changes Can Be Made
Figure 8.60 Status Where the ENTER Button Is Pressed after Changing Setup Items In the status as shown in Figure 8.60, the time can be changed in the same way as changing the date with △, ▽ keys and the ENTER key. ⓒ 2006 Rootech Inc. All Rights Reserved Page 165...
Page 166: Do Associated With Di
DI7 Type The same as 「DI1 Type」 item. DI8 with The same as 「DI1 with」 item. DI8 Type The same as 「DI1 Type」 item. DI9 interlocked The same as 「DI1 with」 item. Page 166 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 167: Figure 8.62 Status Where The Cursor Appears Partially And Changes Can Be Made
If the ENTER key is pressed, the cursor appears in the row after applying the changed value as shown in Figure 8.63. Figure 8.63 Status Where the ENTER Button Is Pressed after Changing Setup Items ⓒ 2006 Rootech Inc. All Rights Reserved Page 167...
Page 168: Figure 8.64 Screen Asking Whether To Apply Changes
「Setup Cancelled!」 message for 2 seconds, as shown in Figure 8.66, without changing the value. Figure 8.64 Screen Asking Whether to Apply Changes Figure 8.65 Screen Notifying that Changes Have Been Made Figure 8.66 Screen Notifying that Changes Have Been Undone Page 168 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 169: Chapter 9 Characteristics Of Protection Relays
Chapter 9 Characteristics of Protection Relays Inverse-time Characteristics Accura 7500 has OCR(51P), NSOCR(46) and OCGR(51G) as the protection elements with inverse-time characteristics. These protection elements can be set up in the same way. Protection relay settings are explained in detail in 「Chapter 6 Setup and Analysis of Protection Relays」.
Page 170: Kepco Curves
1.647 1.882 2.117 2.353 2.823 19.0 0.115 0.231 0.462 0.692 0.923 1.154 1.385 1.616 1.846 2.077 2.308 2.770 20.0 0.113 0.227 0.453 0.680 0.907 1.134 1.360 1.587 1.814 2.041 2.267 2.721 Page 170 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 171: Figure 9.1 Iec Curve A
Accura 7500 User Guide Chapter 9 Characteristics of Protection Relays Figure 9.1 IEC Curve A Table 9.4 IEC Curve B Timetable ⓒ 2006 Rootech Inc. All Rights Reserved Page 171...
Page 172 0.556 0.635 0.715 0.794 0.953 19.0 0.038 0.075 0.150 0.225 0.300 0.375 0.450 0.525 0.600 0.675 0.750 0.900 20.0 0.036 0.071 0.142 0.213 0.284 0.355 0.426 0.497 0.568 0.639 0.711 0.853 Page 172 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 174 0.173 0.198 0.223 0.248 0.297 19.0 0.011 0.022 0.044 0.067 0.089 0.111 0.133 0.156 0.178 0.200 0.222 0.267 20.0 0.010 0.020 0.040 0.060 0.080 0.100 0.120 0.140 0.160 0.180 0.201 0.241 Page 174 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 176 4.941 5.647 6.353 7.059 8.471 19.0 0.333 0.667 1.333 2.000 2.667 3.333 4.000 4.667 5.333 6.000 6.667 8.000 20.0 0.316 0.632 1.263 1.895 2.526 3.158 3.789 4.421 5.053 5.684 6.316 7.579 Page 176 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 177: Figure 9.4 Iec Curve Li
Accura 7500 User Guide Chapter 9 Characteristics of Protection Relays Figure 9.4 IEC Curve LI Table 9.7 KEPCO Normal Inverse Timetable ⓒ 2006 Rootech Inc. All Rights Reserved Page 177...
Page 178 1.588 1.815 2.042 2.268 2.722 19.0 0.112 0.223 0.447 0.670 0.893 1.117 1.340 1.563 1.787 2.010 2.233 2.680 20.0 0.110 0.220 0.440 0.660 0.881 1.101 1.321 1.541 1.761 1.981 2.201 2.642 Page 178 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 180 0.859 0.981 1.104 1.227 1.472 19.0 0.061 0.121 0.242 0.364 0.485 0.606 0.727 0.849 0.970 1.091 1.212 1.455 20.0 0.060 0.120 0.240 0.360 0.480 0.600 0.720 0.840 0.960 1.080 1.200 1.440 Page 180 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 182: Characteristics Of Selective Ground Relay (Sgr)
Vo to maintain compatibility with analog relays. However, in the wiring diagram provided for Accura 7500, the polarity of Vo is not wired reversely. Therefore, when the GPT is connected as in the wiring diagram, the reference voltage is Vo, and so MTA must be set to 210°...
Page 183: Instantaneous And Definite-Time Characteristics
50 ms, there is no need to set the time, and in the case of the definite-time relay, the delay time needs to be set. Accura 7500 has the protection elements with both instantaneous and definite time characteristics, including OCR(50P), OCGR(50G), OVR(59), UVR(27), and OVGR(64). These instantaneous and definite time protection elements can be set up in the same way.
Page 184: Thr Characteristic
= Operation Time (or Trip Time) �� = Heat Rise Time constant �� = Basic Current, Rated Motor Current (Im) �� = Overload Factor �� = Relay Input Current �� Page 184 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 185: Figure 9.8 Thr Thermal Curve
The temperature values of the motor are accumulated when the motor current exceeds the value obtained by multiplying the rated motor current by the k value. The accumulated thermal value increases in proportion to the value of 「Heat Rise Time Constant 」. �� ⓒ 2006 Rootech Inc. All Rights Reserved Page 185...
Page 186 9.09 4.20 2.22 2.51 2.82 3.50 4.26 5.11 6.04 7.07 8.19 4.40 2.02 2.28 2.56 3.18 3.87 4.64 5.48 6.40 7.41 4.60 1.84 2.08 2.34 2.90 3.53 4.23 4.99 5.83 6.75 Page 186 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 187 0.69 16.00 0.15 0.17 0.19 0.23 0.28 0.34 0.40 0.46 0.53 18.00 0.12 0.13 0.15 0.19 0.22 0.27 0.31 0.36 0.42 20.00 0.10 0.11 0.12 0.15 0.18 0.22 0.25 0.29 0.34 ⓒ 2006 Rootech Inc. All Rights Reserved Page 187...
Page 188 0.76 1.17 1.61 2.06 2.54 3.04 3.57 4.11 4.69 4.40 0.34 0.69 1.06 1.46 1.87 2.30 2.75 3.22 3.72 4.23 4.60 0.31 0.63 0.97 1.32 1.70 2.09 2.50 2.93 3.37 3.84 Page 188 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 189 0.05 0.08 0.10 0.13 0.16 0.19 0.23 0.26 0.29 18.00 0.02 0.04 0.06 0.08 0.10 0.13 0.15 0.18 0.21 0.23 20.00 0.02 0.03 0.05 0.07 0.08 0.10 0.12 0.14 0.17 0.19 ⓒ 2006 Rootech Inc. All Rights Reserved Page 189...
Page 190 1.44 1.86 2.29 2.74 3.22 3.72 4.25 4.79 5.37 4.40 0.95 1.31 1.68 2.07 2.48 2.92 3.37 3.84 4.33 4.85 4.60 0.87 1.19 1.53 1.89 2.26 2.65 3.06 3.49 3.94 4.40 Page 190 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 191 0.09 0.12 0.15 0.18 0.21 0.24 0.27 0.30 0.34 18.00 0.05 0.07 0.10 0.12 0.14 0.16 0.19 0.21 0.24 0.27 20.00 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19 0.22 ⓒ 2006 Rootech Inc. All Rights Reserved Page 191...
Page 192 2.05 2.46 2.89 3.35 3.83 4.33 4.85 5.40 5.97 4.40 1.50 1.86 2.23 2.62 3.03 3.46 3.92 4.39 4.88 5.40 4.60 1.37 1.69 2.03 2.39 2.76 3.15 3.56 3.99 4.44 4.90 Page 192 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 193 0.13 0.16 0.19 0.22 0.25 0.28 0.31 0.34 0.38 18.00 0.09 0.11 0.13 0.15 0.17 0.20 0.22 0.25 0.27 0.30 20.00 0.07 0.09 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 ⓒ 2006 Rootech Inc. All Rights Reserved Page 193...
Page 194: Motor Starting Characteristics
If the current drops to the value below 10 % of the rated motor current, it is acknowledged that the motor is in a stopped state, and this protection element will start operating again to protect the motor during the next startup. Page 194 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 195: Chapter 10 Setup Examples
Setup for Automatic Power Recovery Function Through Accura 7500, users should properly set the Circuit Breaker(CB) to be turned OFF(OPEN) in case of a blackout and set the CBs to be turned ON(CLOSE) in sequence, starting from the CBs located at the top of the panel in case of power recovery.
Page 196: Figure 10.2 Definite-Time Uvr Setup Screen
After operating all the relay elements in Accura 7500, the operating relay elements are reset by pressing the Fault Reset button in the Local mode accessed via the button on the front panel. However, for automatic power recovery, once the cause of the fault is removed, the fault in the UVR is automatically reset and the condition for automatically closing the CB is satisfied.
Page 197: Din Setup
However, the automatic closing of the CB using the 「CB Operation」 function is possible only when the operation mode of Accura 7500 is set to 「Remote」. For manual controls in the field, the automatic operation function is disabled if the operation mode of the device is set to 「Local」. In addition, the ⓒ...
Page 198: Precautions
To avoid this kind of situation, First, set the operation mode of Accura 7500 to 「Local」 on site and perform the 「Fault Reset」 function. Second, remove the voltage applied to the corresponding digital input channel set via 「Setup > DIN Setup >...
Page 202: Sequence Diagram
If the CB control output (CBON, CBONG, CBOFF, CBOFFG) and circuit breaker (CB) are directly wired, it can damage the device by burning out the internal contacts of Accura 7500. Thus, it is recommended that you should perform wiring through the auxiliary relay.
Page 204 Accura 2300/2350, Accura 2300S/2350, Accura 2700/2750, Accura 3000, Accura 3300E, Accura 3300S/3300, Accura 3500S/3500, Accura 3550S/3550, Accura 3700, Accura 5500, and Accura 7500 are trademarks of Rootech Inc. Contact us for detailed product specifications and ordering information. Information contained herein is subject to change without notice.

ROOTECH ACCURA 7500 User Manual

Chapter 1 Product Introduction

Chapter 2 Technical Specifications

Chapter 3 Product Installation

Chapter 4 Meter Operation/Setup

Chapter 5 Operating the Protection Relay

Chapter 6 Protection Relay Setup and Analysis of Faults

Chapter 7 Checking the Status of Relays

Chapter 8 General Setup of Relay Functions

Chapter 9 Characteristics of Protection Relays

Chapter 10 Setup Examples

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Summary of Contents for ROOTECH ACCURA 7500