Basler Electric BE1-87B - Manual (Page 71)

Test Equipment
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Variable voltage source, 0 to 200 volts rms, with provision for automatic removal of test voltage upon
sensing of contact closure
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Variable current test source, 0 to 3 amperes ac
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Timer
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Digital multimeter
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Circuit board extender card, Basler P/N 9112930101
Power Supply Status
1. Connect a digital multimeter set for continuity checking between relay terminals 11 and 12 (normally
closed contact, de-energized power supply) and verify zero ohms resistance (refer to Figure 4-16 or
4-17).
2. With the multimeter still connected between terminals 11 and 12, energize the relay power supply,
terminals 15 and 16, with name plate voltage. Verify that the contact between terminals 11 and 12
opens and that the power LED lights.
3. The power supply status is designed to be “fail-safe” in that the contact will “fail closed” if power
supply voltage is removed. Remove the power supply voltage and verify that the contact between
terminals 11 and 12 closes.
Pickup Voltage Control Test
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. Verify that the power supply voltage is disconnected (terminals 15 and 16).
2. Remove the front panel of the relay (four screws on either side of the cradle).
3. Disconnect the ribbon cable that runs between the Control Board and the SCR Board(s), at the
Control Board end. Exercise standard precautions for handling printed circuit boards.
4. Remove the Control Board, refer to Figure 5-1, and install the Circuit Board Extender Card, Basler
part number 9112930101 (refer to Figure 5-2).
5. Insert the Control Board into the card extender.
6. Connect a digital multimeter set for dc voltage between card extender pins 40 and 43, positive on 40.
7. Verify that the Pickup Voltage Control is set to 50 volts.
8. Apply power supply voltage to terminals 15 and 16.
9. Digital multimeter should read 1 volt dc with the Pickup Voltage Control set for 50 volts.
10. Move the Pickup Voltage Control to the 100-volt position and the digital multimeter should read 2 Vdc.
11. Move the Pickup Voltage Control to the 150, 200, 250, 300, 350, and 400 volt positions while reading
the dc voltage. The corresponding dc voltage readings should be 3, 4, 5, 6, 7, and 8 Vdc respectively.
12. Return the Pickup Voltage Control to the 50 volt position (1 Vdc).
13. Remove power supply voltage from terminals 15 and 16.
14. Remove the Control Board from the card extender.
15. Remove the circuit board extender card.
16. Return the Control Board to the original position.
17. Carefully reconnect the ribbon cable. Make sure the board pins are aligned with the ribbon socket.
18. Replace the front panel (4 screws).
9282300990 Rev P BE1-87B Testing 5-3