BE1-51/27R - Tests And Adjustments
5-1
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 front 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.
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 6.
REQUIRED TEST EQUIPMENT
Minimum test equipment required for relay testing and adjustment is listed below. Refer to Figures 5-1
through 5-6 for test setups.
a.
Appropriate ac or dc power source for relay operation.
b.
Appropriate ac source (50 or 60 Hz as appropriate) for voltage and current testing.
c.
Dc external power source for output relay(s) test setup and timer input.
d.
Relay test set capable of delivering 40 A. A higher capability is needed for instantaneous settings
above 40 A.
e.
Timer.
f.
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 5-6, depending upon the
sensing input type for your relay (See Figure 1-1, Style Number Identification Chart).
(a) Sensing Input Type M or N (Single-Phase Sensing). Refer to Figure 5-1.
Ensure that the timed output terminals 1 and 10 are connected.
(b) Sensing Input Type R or S (Three-Phase Sensing). Refer to Figure 5-2.
Ensure that the timed output terminals 1 and 10 are connected.