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GE SBC231A Instructions Manual page 10

Static breaker back-up relays

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GEK-100637
T3
-
SHUTDOWN TEST
1. Connect the relay as shown in Figure 15.
2. Conduct the test according to item 4 of the BFT TEST.
3. While the input current is still being applied, decrease the input DC to 60% of the Rated
DC voltage.
4. The only relay lights that should remain on are the DC Voltage Low light and the
Energized light. All contacts should go to their unenergized state.
T4
-
POWER SUPPLY ALARM TEST
1. Connect the relay as shown in Figure 16.
2. Conduct the test according to item 4 of the BFT TEST.
3. While the input current is being applied, lower the DC voltage to 19 VDC.
4. All output contacts should go to their unenergized state and the Power Supply Alarm
contacts should close.
T5
-
TARGET TEST
1. Connect the relay as shown in Figure 17.
2. Input current 5 percent above the Phase pickup setting.
3. Input 200 mA through contacts 11,12 and see that the BFTI target has tripped.
4. Input 200 mA through contacts 13,14 and see that the BFT2 target has tripped.
-10-

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