Maintenance 8-1
SECTION 8
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MAINTENANCE
GENERAL
BE3-GPR Generator Protective Relays require no preventive maintenance. However, functional testing
should be performed according to scheduled practices. If the relay fails to function properly, follow the
procedures in Table 8-1, Troubleshooting. If addition maintenance is required, consult the Customer
Service Department of the Power Systems Group, Basler Electric, for a return authorization number prior
to shipping.
TROUBLESHOOTING
Table 8-1. Troubleshooting Procedures
Symptom Recommended Procedure
No display Check battery input connections and verify voltage applied is
between 8 to 32 volts and that the polarity is correct.
No communications Check serial port connections, verify that the host computer is
configured for 2400 baud rate, 8 data bits, 1 stop bit, and no
parity. Verify Rx and TX lines are connected correctly and not
switched.
No data can be entered from the front
panel.
Verify that the program enable jumper is installed.
Display always flashes a previous trip
condition.
Momentarily close the trip reset input or enable the automatic
trip reset option.
Reverse power pickups are not correct. Verify sensing method is correct and is appropriate for the
application. Verify CT B input is sensing phase B current and is
in the correct polarity.
Reactive current pickups are not
correct.
Verify sensing method is correct and is appropriate for the
application. Verify CT B input is sensing phase B current and is
in the correct polarity.
Trips occur during generator ramp-up
or shutdown.
Close output disable to disable trips during ramp-up/down
periods. Increase trip timing.
Phase balance always tripped. Verify that the phase rotation is ABC and that the system
application is appropriate.
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