Basler Electric BE1-51/27R - Manual (Page 56)

50 9137200999 Rev F
Step 11. Record the current reading. Remove input current (the front panel TIMING indicator should
extinguish).
RESULT: The recorded value should be greater than 40 times the front panel TAP selector A
setting for the maximum overcurrent pickup point for the instantaneous 1 overcurrent element.
Note
For relays having neutral sensing (Sensing Input Types E, F, U, W, Y,
or Z) perform Step 12. Otherwise, proceed to Step 13.
Step 12. For the neutral sensing, connect the relay as shown in Figures 31 and 33, then repeat Steps 2
through 11, substituting the following:
(a) The front panel TAP (NEUTRAL) selector instead of the front panel TAP selector (Step 3).
(b) The front panel INST 1 (NEUTRAL) control instead of the front panel INST 1 control
(Step 4)
Note
For relays with Option 1-2 (Inst. 2 elements), perform Step 13.
Otherwise, the test ends here.
Step 13. Reconnect the test setup to the INST 2 output terminals (11 and 12) as shown in Figure 29,
then repeat Steps 4 through 11, substituting the following:
(a) Front panel INST 2 control instead of the front panel INST 1 control (Step 3).
(b) Front panel FUNCTION-INST 2 target instead of the front panel INST 1 target (Step 4).
(c) Instantaneous 2 output relay instead of the instantaneous 1 output relay (Step 2).
Voltage Restraint Test
This test checks the overcurrent pickup points at 50 and 100 percent of nominal voltage levels.
Step 1. Perform the Preliminary Instructions.
Step 2. Set the front panel TAP selector to A.
Step 3. Verify that test voltage is 100% of nominal voltage based on the sensing input type for your
relay.
Step 4. Slowly increase the input current from 0 until the appropriate phase timing indicator just
illuminates.
RESULT: The overcurrent pickup point should be 100
±5% of the front panel setting.
Step 5. Apply 50% of nominal voltage based on the sensing input type for your relay.
Step 6. Slowly increase the input current from 0 until the appropriate phase timing indicator just
illuminates.
RESULT: The overcurrent pickup point should be whichever is greater: 50
±10% of the front
panel setting or 50 mA (Sensing Input Ranges 1, 2, 3, 4, and 5) or 10 mA (Sensing Input
Ranges 6, 7, 8, and 9).
Tests and Adjustments BE1-51/27R