Basler BE1-87B Instruction Manual
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Basler BE1-87B Instruction Manual

Bus differential relay
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INSTRUCTION MANUAL
FOR
BUS DIFFERENTIAL RELAY
BE1-87B
Publication Number: 9282300990
Revision: L
02/07

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  • Page 1 INSTRUCTION MANUAL BUS DIFFERENTIAL RELAY BE1-87B Publication Number: 9282300990 Revision: L 02/07...
  • Page 3 INTRODUCTION This manual provides information concerning the operation and installation of a BE1-87B Relay. To accomplish this, the following is provided. • Specifications • Functional Description • Installation Information • Testing Procedures WARNING! To avoid personal injury or equipment damage, only qualified personnel should perform the procedures presented in this manual.
  • Page 4 February 2007 CONFIDENTIAL INFORMATION Of Basler Electric, Highland, IL. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of Basler Electric.
  • Page 5 PRODUCT REVISIONS The following information provides a historical summary of the changes made to the hardware and instruction manual of the BE1-87B Bus Differential Relay. All revisions are listed in chronological order. Hardware Version Change ⎯ Initial release. Enhanced temperature stability and SWC immunity in single-phase relays.
  • Page 6 Added option “R” mounting type to Style Number. Updated Output Contact ratings in Section 1. Added 19” Horizontal Rack-Mount Front and Side views to Section 4, Installation. Added GOST-R certification to Section 1, General Information, Specifications. Updated Intentional Delay Jumper instructions on pages 2-11 and 3-5. BE1-87B Introduction 9282300990 Rev L...
  • Page 7 CONTENTS SECTION 1 • GENERAL INFORMATION ....................1-1 SECTION 2 • APPLICATION ........................2-1 SECTION 3 • HUMAN MACHINE INTERFACE ..................3-1 SECTION 4 • INSTALLATION ........................4-1 SECTION 5 • TESTING ..........................5-1 9282300990 Rev L BE1-87B Introduction...
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  • Page 9: Table Of Contents

    Weight............................. 1-4 Case Size............................1-4 Figures Figure 1-1. BE1-87B Style Chart....................... 1-1 Figure 1-2. Typical Pickup Current Response Time without a Trip Delay ..........1-2 Tables Table 1-1. BE1-87B Power Supply Specifications ..................1-2 9282300990 Rev L BE1-87B General Information...
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  • Page 11: Section 1 • General Information

    FEATURES The BE1-87B offers high-speed fault protection, which may be applied to individual elements or zones of ac power systems. It operates in less than 7 milliseconds for fault levels of 1.5 times the current pickup and less than 5.5 milliseconds for fault levels above six times the current pickup. This high-speed operation minimizes potential damage to the protected equipment.

  • Page 12: Style Number Example

    Style Number Example The style number identification chart defines the electrical characteristics and operation features included in the BE1-87B relay. For example, if the style number were BE1-87B S5AA1YN0N0F, the device would have the following: BE1-87B S..Single-phase current sensing 5 ..

  • Page 13: Current And Voltage Settings

    For test and calibration purposes, the BE1-87B has been designed to withstand 300 Vac for a maximum duration of 60 minutes. Targets LED indication (Trip LED) is latched with an internal, mechanical latching relay.

  • Page 14: Electrostatic Discharge (Esd)

    Qualified to IEC 255-21-1, Class 1. Weight 1-phase Relay: 14.3 lb (6.5 kg) maximum 3-phase Relay: 19.2 lb (8.8 kg) maximum Case Size 1-phase Relay: 3-phase Relay: M1 or 19” Rack-Mount Case dimensions are provided in Section 4, Installation. BE1-87B General Information 9282300990 Rev L...

  • Page 15: Table Of Contents

    Figure 2-5. Illustration of Single Line-to-Ground Fault at Location F1 ............2-7 Figure 2-6. Typical Secondary Excitation for 1200/5 Bushing Current Transformer......... 2-8 Figure 2-7. Simplified Internal Connection Diagram for BE1-87B Relay........... 2-9 Figure 2-8. Voltage Appearing Across Full Winding of CT..............2-10 Figure 2-9.
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  • Page 17: Section 2 • Application

    Contacts from the lockout relay (86) should be connected across terminals 5 and 6 (single-phase or phase A for 3-phase models), 3 and 4 (phase B), and 1 and 2 (phase C) of the BE1-87B relay to short- circuit the SCRs in the input circuit after a trip output has been initiated. This allows the relay to continue operation as a conventional overcurrent relay and at the same time protect against exceeding the short- time rating of the internal SCRs.

  • Page 18: Be1-87B Flexibility

    BE1-87B FLEXIBILITY Because of the flexible wide range design of the BE1-87B, it is possible to apply the relay in situations where the current sensing input circuit is less than ideal. It should be noted, however, that the possibility of less sensitive settings, equipment overvoltage, or false operation could result. Careful review of the following application notes is recommended: •...
  • Page 19 87B- 1 TO SURGE GROUND Three Phase 87B Relay Single Phase 87B- 2 D2853-3 5-26-99 TO SURGE Surge GROUND Ground Single Phase 87B- 3 TO SURGE GROUND Figure 2-1. External AC Connections for Bus Protection 9282300990 Rev L BE1-87B Application...

  • Page 20: Shunt Reactor Protection Application

    Figure 2-2. External DC Connections for Bus Protection Shunt Reactor Protection Application Differential protection of shunt reactors may be provided by using only one single-phase BE1-87B relay, three single-phase relays, or one three-phase relay. Typical ac external connection diagrams for these schemes are shown in Figures 2-3 and 2-4.

  • Page 21: Mixing Two Different Ratio Cts

    OPERATING PRINCIPLES The BE1-87B high impedance, differential relay operates on the instantaneous value of CT secondary voltage to which the relay is connected. All the CTs in the differential circuit must have the same turns ratio.

  • Page 22: External Faults

    For example, Figure 2-5 shows a one-line diagram for a three input differential scheme. The BE1-87B must not operate for a fault at F1. Since the CTs in the faulted feeder (CT 3) will see the most current, assume they will saturate completely, thus causing the magnetizing reactance to drop to zero.

  • Page 23: Internal Faults

    BE1-87B relay operates as a function of the instantaneous voltage, the relay can be set to be selective between internal and external faults. An indication of the peak voltages that a CT can produce can be determined by a simple modification to the CT secondary excitation characteristic.
  • Page 24 Figure 2-6. Typical Secondary Excitation for 1200/5 Bushing Current Transformer Figure 2-7 illustrates, in simplified form, the internal connections of the BE1-87B relay. When an internal fault occurs, the peak voltage developed in the secondary of the feeder CTs will appear across the relay input network via phase A, phase B, or phase C.
  • Page 25 Figure 2-7. Simplified Internal Connection Diagram for BE1-87B Relay For convenience, the BE1-87B relay voltage settings are calibrated in terms of rms symmetrical volts and all calculations for settings are made in terms of rms symmetrical quantities. The relay responds to the instantaneous value of applied voltage, and this maximum instantaneous value can be two times the square root of two or 2.83 times V...

  • Page 26: Characteristics

    Pickup current is defined as the rms value of a symmetrical sinusoidal current that must flow into the 87B in order to provide a contact output. The BE1-87B has a pickup current selector switch that allows for a range of 0.25 to 2.5 amperes rms in 0.25 ampere increments. However, the relay internally operates off of the instantaneous peak of this sinusoidal current.

  • Page 27: Section 1 • General Information

    25 milliseconds. Operating Times The BE1-87B operates in less than 7 milliseconds (1/2 cycle) for faults 1.5 times the current pickup. The BE1-87B operates in less than 5.5 milliseconds for fault levels above 6 times the current pickup. High- speed operation minimizes potential damage to the protected equipment.

  • Page 28: Calculation Of Settings

    CALCULATION OF SETTINGS The BE1-87B relay is set based on the maximum possible voltage that can be produced in the differential circuit as a result of a fault external to the zone of protection. Determination of the maximum voltage for this condition is subject to simple calculations, and thus, the relay setting is easily determined.

  • Page 29: Shunt Reactor Protection

    Shunt Reactor Protection Depending on the type of protection required, shunt reactors may be protected by the BE1-87B relay in one of two ways (see Figures 2-3 and 2-4). Since the shunt reactors contribute no current to an external fault, Equation 5 should be evaluated using the highest magnitude of current that can flow in the reactor under any system condition, exclusive of a fault in the reactor.

  • Page 30: Minimum Fault To Trip (Voltage Element)

    0.5 amperes. 4. The current should be set high enough so that if the BE1-87B CT Test feature is used (to test for CT short-circuits), the current that is induced in the relay by the test will be less than the current setting of the relay by a comfortable margin.

  • Page 31: Sample Calculation

    5000 SAMPLE CALCULATION The various steps for determining the setting of the BE1-87B in a typical bus application will be demonstrated with the aid of a worked example. Assume the protected zone includes five breakers, all rated at 69 kV, 1500 MVA, and 1200 amperes, with a maximum interrupting rating of 12,500 amperes.

  • Page 32: Ct Test Circuit Calculations

    • Z TOTAL – Z BUS + Z PCT. • I HT – Test current value for a HEALTHY current circuit. • V R TEST –voltage drop across R TEST during a HEALTHY test. 2-16 BE1-87B Application 9282300990 Rev L...

  • Page 33: Calculation Steps

    1. From a CT excitation curve, find Ie at 30 volts for full ratio. At 30 volts on the 240 /1 curve, Ie is approximately equal to .017 amps: CTZ = V Test / Ie or 30 / .017 = 1765 ohms/CT (ignoring any reactive component) 9282300990 Rev L BE1-87B Application 2-17...
  • Page 34 8. If the %V Alarm is below 110%, raise V Test to 60 volts and repeat all calculation steps. A %V Alarm less than 110% may result in indication of an unhealthy CT circuit when in fact there is nothing wrong. 2-18 BE1-87B Application 9282300990 Rev L...
  • Page 35 CT Test Pushbutton ........................... 3-4 CIRCUIT BOARD CONTROLS......................3-4 Intentional Delay Jumper........................3-5 Figures Figure 3-1. BE1-87B Controls and Indicators (Single-Phase Version) ............. 3-1 Figure 3-2. BE1-87B Controls and Indicators (Three-Phase Version) ............3-2 Figure 3-3. Intentional Delay Jumper Location..................3-4 Tables Table 3-1.
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  • Page 37: Section 3 • Human-Machine Interface

    For physical reference to the devices listed in the following paragraphs, refer to Figures 3-1 and 3-2. Figure 3-1 shows the single-phase version of the BE1-87B and Figure 3-2 shows the three-phase version of the BE1-87B. Controls and indicators of a 19” rack-mount relay are identical to Figure 3-2, except rotated 90 degrees.
  • Page 38 Figure 3-2. BE1-87B Controls and Indicators (Three-Phase Version) BE1-87B Human-Machine Interface 9282300990 Rev L...

  • Page 39: Power Led

    Pickup Current Control. The Pickup Current Trip LED remains lit until the Reset button is pressed. LED status is maintained when the relay is de-energized. When operating power is re-applied, the LED lights and remains lit until the Reset button is pressed. 9282300990 Rev L BE1-87B Human-Machine Interface...

  • Page 40: Reset Pushbutton

    Details about CT input circuit testing are provided in the CT Test sub-section of Section 5, Testing. CIRCUIT BOARD CONTROLS The BE1-87B relay has one circuit board control, the Intentional Delay Jumper. The jumper’s location is illustrated in Figure 3-3 and its function is described in the following paragraphs.

  • Page 41: Intentional Delay Jumper

    ∗ Actual intentional time delay is a function of pickup current. For currents exceeding twice the pickup setting, intentional time delay is 20 milliseconds. For currents less than twice the pickup setting, intentional time delay is 25 milliseconds. 9282300990 Rev L BE1-87B Human-Machine Interface...
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  • Page 43 Figure 4-15. Mounting and Drilling Dimensions for CT Diagnostic Test Source Assembly ....4-16 Figure 4-16. BE1-87B, Three-Phase Internal Connection Diagram............4-17 Figure 4-17. BE1-87B, Single-Phase Internal Connection Diagram ............4-18 Figure 4-18. CT Diagnostic Test Source Assembly Internal Connection Diagram ......... 4-19...
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  • Page 45 In the event the relay is not to be installed immediately, store the relay in its original shipping carton in a moisture and dust free environment. When the BE1-87B is to be placed in service, it is recommended that the procedures outlined in Section 5, Testing be performed prior to installation.
  • Page 46 D2853-25.VSD -20-00 Figure 4-1. S1 Case, Outline Dimensions, Front View BE1-87B Installation 9282300990 Rev L...
  • Page 47 D2856-01.VSD 12-20-00 Figure 4-2. S1 Case, Double-Ended, Semi-Flush Mounting, Side View 9282300990 Rev L BE1-87B Installation...
  • Page 48 PANEL CASE DETAIL A-A SHOWING THE ADDITION OF WASHERS OVER THE BOSS TO TIGHTEN THE RELAY AGAINST THE PANEL. D2856-06.VSD 12-20-00 Figure 4-3. S1 Case, Double-Ended, Projection Mounting, Side View BE1-87B Installation 9282300990 Rev L...
  • Page 49 Figure 4-4. S1 Case, Double-Ended, Outline Dimensions, Rear View 9282300990 Rev L BE1-87B Installation...
  • Page 50 Figure 4-5. S1 Case, Panel Drilling Diagram, Semi-Flush Mounting BE1-87B Installation 9282300990 Rev L...
  • Page 51 Figure 4-6. S1 Case, Panel Drilling Diagram, Projection Mounting 9282300990 Rev L BE1-87B Installation...
  • Page 52 D2856-09.VSd 12-20-00 Figure 4-7. M1 Case, Outline Dimensions, Front View BE1-87B Installation 9282300990 Rev L...
  • Page 53 D2856-10.VSD 12-20-00 Figure 4-8. M1 Case, Semi-Flush Mounting, Outline Dimensions, Side View 9282300990 Rev L BE1-87B Installation...
  • Page 54 PANEL CASE DETAIL A-A SHOWING THE ADDITION OF WASHERS OVER THE BOSS TO TIGHTEN THE RELAY AGAINST THE PANEL. D2856-12 06-15-99 Figure 4-9. M1 Case, Double-Ended, Projection Mounting, Side View 4-10 BE1-87B Installation 9282300990 Rev L...
  • Page 55 D1427-09 12-16-93 Figure 4-10. M1 Case, Double-Ended, Projection Mounting, Outline Dimensions, Rear View 9282300990 Rev L BE1-87B Installation 4-11...
  • Page 56 Figure 4-11. M1 Case, Panel Drilling Diagram, Semi-Flush Mounting 4-12 BE1-87B Installation 9282300990 Rev L...
  • Page 57 (188.1) .56 (14.3) DIA. 5 PLACES (12.7) TYP. 1.47 (17.5) (37.3) 1.00 .75 (19.1) DIA. (25.4) 20 PLACES (6.4) 2.63 (66.8) 5.25 D1427-12 (133.4) 2-29-96 Figure 4-12. M1 Case, Panel Drilling Diagram, Projection Mounting 9282300990 Rev L BE1-87B Installation 4-13...
  • Page 58 P0046-10 Figure 4-13. 19” Horizontal Rack-Mount, Front View (Shown Vertically) 4-14 BE1-87B Installation 9282300990 Rev L...
  • Page 59 P0046-09 Figure 4-14. 19” Horizontal Rack-Mount, Side View (Shown Vertically) 9282300990 Rev L BE1-87B Installation 4-15...
  • Page 60 Refer to Section 2, Application, CT Test Circuit Calculations for information about determining which CT test voltage tap to use when making CT Diagnostic Test Source connections. Connections should be made with minimum wire size of 14 AWG. Internal connections are shown in Figure 4-18. 4-16 BE1-87B Installation 9282300990 Rev L...
  • Page 61 RELAY TROUBLE TRIP 2 ALARM TRIP 1 POWER EXTERNAL CASE GROUND TERMINAL POW ER SUPPLY INTERNAL CIRCUITRY TEST D2853-12 10-10-03 Figure 4-16. BE1-87B, Three-Phase Internal Connection Diagram 9282300990 Rev L BE1-87B Installation 4-17...
  • Page 62 RELAY TRIP 2 ALARM TROUBLE TRIP 1 POWER EXTERNAL CASE GROUND TERMINAL POW ER SUPPLY INTERNAL CIRCUITRY TEST D2853-17 10-10-01 Figure 4-17. BE1-87B, Single-Phase Internal Connection Diagram 4-18 BE1-87B Installation 9282300990 Rev L...
  • Page 63 SOURCE CONNECTIONS 240V 120V 100 ohms D2862-13 50 W 01-03-03 RELAY CONNECTIONS Figure 4-18. CT Diagnostic Test Source Assembly Internal Connection Diagram 9282300990 Rev L BE1-87B Installation 4-19...
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  • Page 65 Figure 5-2. Circuit Board Extender Card ....................5-2 Figure 5-3. Alarm Voltage Test Setup ....................... 5-4 Figure 5-4. Pickup Voltage Test Setup...................... 5-5 Figure 5-5. Pickup Current Test Setup ...................... 5-6 Figure 5-6. Trip Time Test Setup....................... 5-6 9282300990 Rev L BE1-87B Testing...
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  • Page 67: Section 5 • Testing

    Security Considerations – CT Circuit Testing The voltage required to gate the BE1-87B SCRs is two times V DIFF or 300 volts as in the CT test example of Section 2, Application, CT Test Circuit Calculations. By maintaining the test voltage at approximately 1.5 times V ALARM or 30 volts as in the example, a transient of 10 per unit would have to...
  • Page 68 CONTROL BOARD D2862-15 01-07-03 POWER SUPPLY SCR BOARD CONTROL BOARD SCR BOARD SCR BOARD SCR BOARD Figure 5-1. Side View of Cradle Assembly (M1 or 19” Rack-Mount and S1 Configuration) Figure 5-2. Circuit Board Extender Card BE1-87B Testing 9282300990 Rev L...

  • Page 69: Test Equipment

    To eliminate the historical need for progressively higher test voltages (up to 800 volts rms symmetrical) required for testing High Z differential relays, the following test was developed. It will verify the BE1-87B Pickup Voltage Control settings (this procedure is identical for single-phase and three-phase models because the three-phase model uses a common Control Board): 1.

  • Page 70: Alarm Voltage Test

    Alarm Voltage Test Figure 5-3. Alarm Voltage Test Setup 1. Set the BE1-87B Pickup Voltage Control to 50 volts. 2. Set the Alarm Voltage Control to 10%. The Alarm Voltage pickup setting should be 5 volts rms (0.1 x 50) ±5%. Connect the relay as per the test diagram in Figure 5-3. Energize the relay power supply and verify that the CT OV and Trip LEDs are reset.

  • Page 71: Pickup Current Test

    SCRs through T1. There is no need to apply higher rms test voltages to the relay. This completes the voltage tests for the BE1-87B. Set the Alarm Voltage and Pickup Voltage Controls to the values calculated for the user’s specific application.

  • Page 72: Trip Led, Loss Of Power Test

    1. Connect the test circuit as shown in Figure 5-6. The test set timer should be set to start on the application of current and stop on trip contact (17 – 18) closure. Figure 5-6. Trip Time Test Setup BE1-87B Testing 9282300990 Rev L...

  • Page 73: Trip Time Delay Test

    When the timing tests are complete, set the Current Pickup Control to the values calculated for the user’s specific application. Verify that the Alarm Voltage and Pickup Voltage Controls have been set to their calculated positions. 9282300990 Rev L BE1-87B Testing...
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  • Page 75 ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com PHONE +1 618-654-2341 FAX +1 618-654-2351...

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