BE1-51C Installation and Testing
6-3
NOTE
Several proprietary test sets are marketed which combine the current source and timer,
and include other features to simplify setup.
While every comprehensive test program should cover all of the above items, the amount of testing within
any category can vary over a great range. The operational test defined below illustrates an appropriate
lower limit for this range.
Operational Test
Confirmation of every parameter within the capability of this relay is usually not practical nor necessary
except as an acceptance procedure for a newly delivered relay. Succeeding tests can be reduced in scope
to conserve time (and thereby permit more frequent tests). Such an operational test may be accomplished
by scaling down the verification tests of this subsection as follows.
1.
By concentrating on the parameters actually required in the assigned application;
2.
By using spot tests that check (for example) only one or two multiples of applied TAP current
at only one or two TAP positions.
Accordingly, the procedures described below can serve as the basis for both verification and operational
testing.
Equipment Required
1.
A current source with the following capabilities.
a. Current output should be switchable so that the test current can be adjusted before it is
applied to the relay's sensing inputs.
b. The current source needs to be capable of delivering at least 20 A. This is necessary to test
the full capability of the instantaneous overcurrent element.
c. Because the current levels used to verify operation of the instantaneous overcurrent
element(s) may exceed the continuous current rating of the relay, it is suggested that the
current source include a provision for automatic removal of the test current following a trip.
2.
A timer accurate to within 0.001 seconds.
3.
Two test plugs, Basler p/n 10095 or GE p/n XLA12A. (Replaces the paddles when testing an
installed relay.)
4.
For bench testing: An appropriate AC or DC power source for relay operation.
Preliminary Steps
1.
With the connecting plugs removed, connect the unit per Figure 6-8. Connect the proper power
supply voltage to terminals 3 and 4. (See the Style Chart for the correct power source for each
supply.)
2.
Insert the relay connecting plugs if bench testing. If relay is installed, insert test plugs instead.
Before applying power, check that the Relay Fail contact is closed (terminals 11 and 12).
3.
Apply operating power at terminals 3 and 4. Verify that the POWER LED is lit, and that the
relay fail contact is open.
Summary of Contents for BE1-51C
Page 12: ...BE1 51C General Information 1 6 Figure 1 1 Style Number Identification Chart...
Page 21: ...BE1 51C Controls and Indicators 2 2 Figure 2 1 Location of Controls and Indicators...
Page 25: ...BE1 51C Functional Description 3 2 Figure 3 1 Functional Block Diagram...
Page 49: ...BE1 51C Operation By Computer 5 14 Figure 5 1 RS 232 Port Connector Wiring...
Page 50: ...BE1 51C Operation By Computer 5 15 Figure 5 2 RS 485 Port Connector Wiring...
Page 58: ...BE1 51C Installation and Testing 6 8 Figure 6 1 Outline Dimensions...
Page 62: ...BE1 51C Installation and Testing 6 12 Figure 6 8 Relay Connections...
