9137200997 Rev D
BE1-51 Tests and Adjustments
5-1
SECTION 5
•
TESTS AND ADJUSTMENTS
GENERAL
Procedures in this section are for use in testing and adjusting a relay for the desired operation in a
protective scheme. If a relay fails an operational test, or if an adjustment discloses a faulty relay, refer to
Section 4,
Installation, Maintenance.
REQUIRED TEST EQUIPMENT
Minimum test equipment required for relay testing and adjustment is listed below. Refer to Figures 5-1
through 5-4 for test setups.
•
Appropriate ac or dc power source for relay operation.
•
Appropriate ac source (50 or 60 hertz as appropriate) for current testing.
•
Dc external power source for output relay(s) test setup and timer input.
•
Relay test set capable of delivering 40 amperes. A higher capability is needed for instantaneous
settings above 40 amperes.
•
Timer.
•
One shunt resistor for providing minimum target load.
OPERATIONAL TEST
Preliminary Instructions
Perform the following steps before going on to any testing.
Step 1. Connect the relay test setup in accordance with Figures 5-1 through 5-4, depending upon the
sensing input type for your relay (see Figure 1-1,
Style Number Identification Chart
).
(a)
Sensing Input Type K (Single-Phase Sensing).
Refer to Figure 5-1.
Ensure that timed output terminals 1 and 10 are connected.
(b)
Sensing Input Type G (Three-Phase Sensing).
Refer to Figure 5-2.
Ensure that timed output terminals 1 and 10 are connected.
(c)
Sensing Input Type H or V (Three-Phase with Neutral Sensing).
Refer to Figure 5-3.
Ensure that the timed output terminals 1 and 10 are connected. Also, verify that either A,
B, or C current sense terminals are connected initially (N terminals will be connected later
in the test).
NOTE
For relays having the above sensing, only the front panel
LOW
range current
sense terminal(s) should be connected for a complete check of the relay.
NOTE
For relays having the above sensing, only the from panel
LOW
range current
sense terminal(s) should be connected for a complete check of the relay.
For all three-phase relays, the test signals must connect to both the current and
voltage terminals for the same phase.