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Summary of Contents for Woodward ESDR 4T
- Page 1 37138C ESDR 4T Current Differential Protection Relay Manual Manual 37138C...
- Page 2 Provides other helpful information that does not fall under the warning or caution categories. Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is believed to be correct and reliable. However, Woodward assumes no responsibility unless otherwise expressly undertaken.
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Page 3: Table Of Contents
Manual 37138C ESDR 4T - Current Differential Protection Relay Revision History Rev. Date Editor Changes NEW 02-11-26 Release 03-02-29 Minor corrections 04-11-22 Minor corrections 07-03-01 Sealing parameters added; minor corrections Contents 1. G ..................5 HAPTER ENERAL NFORMATION 2. E ..............7... - Page 4 Manual 37138C ESDR 4T - Current Differential Protection Relay 7. C ....................33 HAPTER OMMISSIONING Prerequisite............................33 Pre-Adjustments ........................... 33 Testing with Secondary Values ......................33 Differential Current Testing Using Single-Sided Three-Phase Supply ........34 Commissioning Using Primary Values ....................34 Testing for Correct Connection ....................
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Page 5: Chapter 1. General Information
• Rated primary current of the current transformer on the high and low-voltage side • Voltage transformation of the transformer The ESDR 4T consists of a basic unit plus various options. The model designation is determined as follows: ESDR 4T 0 5 -h0018 B/ -ABDEF..Z Options according to the option list. - Page 6 Manual 37138C ESDR 4T - Current Differential Protection Relay Intended Use The unit must only be operated for the uses described in this manual. The prerequisite for a proper and safe operation of the product is correct transportation, storage, and installation as well as careful operation and maintenance.
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Page 7: Chapter 2. Electrostatic Discharge Awareness
CAUTION To prevent damage to electronic components caused by improper handling, read and observe the pre- cautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. © Woodward Page 7/46... -
Page 8: Chapter 3. Wiring
Manual 37138C ESDR 4T - Current Differential Protection Relay Chapter 3. Wiring CAUTION A circuit breaker must be provided near the unit and in a position easily accessible to the operator. This must also bear a sign identifying it as an isolating switch for the unit. -
Page 9: Wiring Diagram
Manual 37138C ESDR 4T - Current Differential Protection Relay Wiring Diagram ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Block Generator differential protection differential protection Possible protected objects: Current IL1 transducer set 2 Current IL2 transducer set 2 Blocking Current IL3 transducer set 2 Acknowledgement Configuration off... -
Page 10: Power Supply
Manual 37138C ESDR 4T - Current Differential Protection Relay Power Supply ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 24 Vdc (+/-25 %) 24 Vdc Power supply Figure 3-2: Power supply Terminal Description +24 V DC, 10 W 2.5 mm² 0 Vdc reference voltage 2.5 mm² Page 10/46... -
Page 11: Measuring Inputs
Manual 37138C ESDR 4T - Current Differential Protection Relay Measuring Inputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ WARNING Before detaching the secondary current transformer connections or those on the unit, you should en- sure that the current transformer secondary is short-circuited. NOTE One side of the secondary of all CTs must be earthed. The earth connection should be made on the side of the secondary facing the protected object. -
Page 12: Discrete Inputs
Manual 37138C ESDR 4T - Current Differential Protection Relay Discrete Inputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 18 to 250 V (ac/dc) Signal device Configuration Signal device Acknowledgment Signal device Blocking Figure 3-4: Discrete inputs Terminal Associated Description common (according to DIN 40 719 section 3, 5.8.3) -
Page 13: Relay Outputs
Manual 37138C ESDR 4T - Current Differential Protection Relay Relay Outputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ max. 250 Vac Relay output external device external device Relay output external device external device Relay output external device Figure 3-5: Relay outputs Description Terminal Root Make-contact Relay 3 - Ready for operation 2.5 mm²... -
Page 14: Chapter 4. Functional Description
They form the protection area boundary or zone. All two or three-phase short-circuits and line-to-earth faults within this protection area are detected by the ESDR 4T as fault currents which cause tripping. The unit does not trip if fault currents occur outside the protection area. In this way, a selective protection is guaranteed. -
Page 15: Measurement Inputs
Manual 37138C ESDR 4T - Current Differential Protection Relay The unit monitors six (6) measured currents via isolated inputs. The unit calculates internally the restraint current ) and the differential current (I ) separately for each phase. The actual values of the calculated parameters (Dif-... -
Page 16: Differential Current Monitoring
Manual 37138C ESDR 4T - Current Differential Protection Relay Differential Current Monitoring ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The monitoring of the differential current is carried out in two stages. The first monitoring stage serves as a warning and can be enabled or disabled. Should the adjustable warning characteristic be exceeded, a text appears in the display and a relay contact is enabled. -
Page 17: Figure 4-2: Characteristic
Manual 37138C ESDR 4T - Current Differential Protection Relay Figure 4-2: Characteristic © Woodward Page 17/46... -
Page 18: Electrical Restraint Of Inrush Current And Overexcitation With Transformers
During an inrush current there are typically high proportions of 2nd order harmonics present. However during overexcitation there are predominantly 5th order harmonics present. The harmonics component is determined in the ESDR 4T using the digital Fourier transformation (= DFT) and this is used as the criteria for electrical re- straint against false tripping. -
Page 19: Inputs And Outputs
Manual 37138C ESDR 4T - Current Differential Protection Relay Inputs and Outputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Control Inputs Configuration off When this input is energized, the unit remains in Display mode and cannot be Terminal 17 changed to Configuration mode. The Configuration mode is enabled if this terminal is de-energized. -
Page 20: Chapter 5. Display And Operating Elements
Manual 37138C ESDR 4T - Current Differential Protection Relay Chapter 5. Display and Operating Elements The foil covering of the front panel consists of coated plastic. All keys are comprised of touch sensitive mem- brane elements. The display is a Liquid Crystal display (LC-display), comprised of two rows of text that are 16 characters each and are indirectly illuminated (green). -
Page 21: Leds
Manual 37138C ESDR 4T - Current Differential Protection Relay LEDs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Restraint current I Color: green The actual values of the restraint current I are visible in the display Differential current I Color: green The actual values of the differential current I are visible in the display. -
Page 22: Lc-Display
Manual 37138C ESDR 4T - Current Differential Protection Relay Display V↓ / Digit↑ Display V↓ / Digit↑ Display mode: Display V↓ -By pressing this button, the monitored values of the restraint current I and the differential current I shown alternately in the top line of the display (the LEDs in- dicate which is being currently displayed). - Page 23 Manual 37138C ESDR 4T - Current Differential Protection Relay Message list: Fault condition Fault message Differential current in Phase L1 exceeds the warning threshold (monitoring level 1) L1: Diff.curr 1 Differential current in Phase L2 exceeds the warning threshold (monitoring level 1) L2: Diff.curr 1...
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Page 24: Chapter 6. Configuration
Manual 37138C ESDR 4T - Current Differential Protection Relay Chapter 6. Configuration Introduction ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ When in configuration mode (simultaneous pressing of "Digit↑" and "Cursor→"), the configuration screen can be advanced by pressing the "Select" button. A scroll function to rapidly advance through the parameters or in- creasing values can be enabled by pressing and holding the desired button. -
Page 25: Configuration Access
Manual 37138C ESDR 4T - Current Differential Protection Relay Configuration Access ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ NOTE If no protection against modification of the setting values is required, we recommend to disable the sealing function. If a sealing function is necessary, we recommend to enable it after the setup is com-... -
Page 26: Figure 6-1: Sealing
Manual 37138C ESDR 4T - Current Differential Protection Relay SEALING Sealing Code no. 000 Code O.K. Code ? To leave the sealing, please change into Wrong Code! automatic [ANWAHL/SELECT] modus. Code no. 000 Breake? Code no. 001 New code: Adjust settings... -
Page 27: Configuring The Relay
Manual 37138C ESDR 4T - Current Differential Protection Relay Configuring the Relay ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ NOTE • Operating current (N.O.): The relay is enabled (i.e. in the operating state) when current flows through the coil. If a loss of the supply voltage occurs, a change of state will not occur in the relay and no triggering of fault conditions occur. - Page 28 Manual 37138C ESDR 4T - Current Differential Protection Relay Resetting time of differential current 0.10 to 99.98 s Release delay Diff.curr.00,00s Only visible if the "Self-acknowledging relay" screen is configured to ON. Self-acknowledging messages ON/OFF Auto-acknowledge messages ON ....Once the fault condition is no longer detected and the message reset- ting time has expired, the message is cleared from the display.
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Page 29: Nominal Data
Manual 37138C ESDR 4T - Current Differential Protection Relay Nominal Data ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ General Data Rated current of the protected object 10 to 9,999 A Nominal current 0000A This value is used as reference value for the calculation and display of restraint cur- rent and differential current. -
Page 30: Differential Protection
Manual 37138C ESDR 4T - Current Differential Protection Relay Transformer vector group Vector group The transformer vector group can be set in this screen. Vector group Dd0 should be set when the device is being used purely as generator differential protection. -
Page 31: Modifying The Tripping Characteristic
Manual 37138C ESDR 4T - Current Differential Protection Relay Modifying the Tripping Characteristic Trigger Value I (X2) 50 to 300 % Release value Is/In X=000% Definition of the threshold characteristic for the monitoring of levels 1 and 2. This value determines the horizontal position (X2 coordinates of points P [X2/Y1] and P [X2/Y2]) of the significant point on the trip and warning characteristic curve. -
Page 32: Modifying The Electrical Restraint
Manual 37138C ESDR 4T - Current Differential Protection Relay Modifying the Electrical Restraint Electrical restraint with inrush current ON/OFF Stabilisation Rush ON ....As soon as the proportion of 2 order harmonics exceeds the limit configured in the parameter "Release value Rush", tripping of the dif- ferential current 1 is restrained. -
Page 33: Chapter 7. Commissioning
Manual 37138C ESDR 4T - Current Differential Protection Relay Chapter 7. Commissioning DANGER - HIGH VOLTAGE When commissioning the control, please observe all safety rules that apply to the handling of live equipment. Ensure that you know how to provide first aid in the event of an uncontrolled release of en- ergy and that you know where the first aid kit and the nearest telephone are. -
Page 34: Differential Current Testing Using Single-Sided Three-Phase Supply
Manual 37138C ESDR 4T - Current Differential Protection Relay Differential Current Testing Using Single-Sided Three-Phase Supply The operating limit can be approached by slowly increasing the test current. The tests can be carried out consecu- tively on the high and low-voltage sides. -
Page 35: Testing For Correct Connection
Manual 37138C ESDR 4T - Current Differential Protection Relay Testing for Correct Connection The excitation should be set so that the generator is loaded to approx. 20% rated current. If the connections are correct, the displayed differential current should be approximately zero. The displayed restraint current should be checked using an external measuring device. -
Page 36: Renewed Test With The Correct Connection
Manual 37138C ESDR 4T - Current Differential Protection Relay Renewed Test with the Correct Connection (Measurement of the maximum differential currents.) Restart the unit after restoring the original connections. Test the differential current and the restraint current at 20 % of the rated current and compare these with the values measured from "Testing for Correct Connection". If the measurements match, you can slowly increase the current up to the rated current. -
Page 37: Appendix A. Dimensions
Manual 37138C ESDR 4T - Current Differential Protection Relay Appendix A. Dimensions 72.0 mm 144.0 mm 16.5 mm 143.0 mm 50.0 mm 46.5 mm ø5.6 mm ø5.8 mm ø4.0 mm ø4.0 mm 25 26 28 29 30 31 32 33... -
Page 38: Appendix B. Technical Data
Manual 37138C ESDR 4T - Current Differential Protection Relay Appendix B. Technical Data Measurements, Currents ---------------------------------------------------------------------------isolated Measured currents (Nominal value I )..........[1] ../1 A, or [5] ../5 A Measuring frequency ................... 40.0 to 70.0 Hz Accuracy ........................Class 1 Linear measuring range.....................5.0 ×... -
Page 39: Appendix C. List Of Parameters
Manual 37138C ESDR 4T - Current Differential Protection Relay Appendix C. List of Parameters Unit number P/N _____________________________ Rev _______________________________ Version ESDR4 _______________________________________________________________ Project _____________________________________________________________________ Serial number S/N _______________ Date ______________________________ Option Parameter Setting range Default Customer settings setting Line 1... - Page 40 Manual 37138C ESDR 4T - Current Differential Protection Relay Vector Group List Vector group -circuit arrangement, LV: ∆-circuit arrangement, 5 × 30 ° = 150 ° -circuit arrangement, LV: -circuit arrangement, 0 ° HV: ∆-circuit arrangement, LV: -circuit arrangement, 5 × 30 ° = 150 °...
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Page 41: Appendix A. Service Options
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Wood- ward in advance to obtain a Return Authorization Number. When shipping the unit(s), attach a tag with the fol- lowing information: •... -
Page 42: Packing A Control
Stuttgart [+49 (0) 711-789 54-0]. They will help expedite the processing of your order through our distributors or local service facility. To expedite the repair process, contact Woodward in advance to obtain a Return Authoriza- tion Number, and arrange for issue of a purchase order for the unit(s) to be repaired. No work can be started until a purchase order is received. -
Page 43: How To Contact Woodward
+49 (0) 711-789 54-100 E-mail: sales-stuttgart@woodward.com For assistance outside Germany, call one of the following international Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service. Facility... -
Page 44: Engineering Services
ESDR 4T - Current Differential Protection Relay Engineering Services ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Woodward Industrial Controls Engineering Services offers the following after-sales support for Woodward prod- ucts. For these services, you can contact us by telephone, by e-mail, or through the Woodward website. • Technical support •... -
Page 45: Technical Assistance
Manual 37138C ESDR 4T - Current Differential Protection Relay Technical Assistance ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ If you need to telephone for technical assistance, you will need to provide the following information. Please write it down here before phoning: Contact Your company ___________________________________________________ Your name ______________________________________________________... - Page 46 Phone +49 (0) 711-789 54-0 • Fax +49 (0) 711-789 54-100 sales-stuttgart@woodward.com Homepage http://www.woodward.com/power Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address/phone/fax/e-mail information for all locations is available on our website (www.woodward.com).
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