BE1-51/27C Tests and Adjustments
5-16
Step 9. Reconnect the output to the neutral current sense terminals. See Figures 5-3, 5-5, or 5-6.
Step 10. Set the front panel
INST 1 (NEUTRAL)
control to a position approximating the desired neutral
instantaneous 1 overcurrent pickup point for the relay.
Step 11 Apply current to the relay.
Step 12 Rapidly increase the overcurrent input to the relay until the instantaneous output relay just
energizes. Note the test set overcurrent threshold reading on the ammeter.
Step 13. Remove the input current.
Step 14. Reset the
INST TARGET
(if present).
Step 15. If the overcurrent threshold reading from Step 13 was too high or low, adjust the front panel
INST
1 (NEUTRAL)
Control CCW to lower (or CW to raise) the Neutral Instantaneous 1 Overcurrent
Pickup Point. Repeat Steps 9 through 14. If
NOT
, proceed to the next test.
INST 2 Control Setting
For this adjustment, repeat INST 1 control setting, but substitute instantaneous 2 output terminals (11 and
12) and the front panel
INST 2
controls Because neutral sensing does not apply to this pickup point, ignore
Steps 9 through 15.
Summary of Contents for BE-51/27C
Page 1: ...0 1 2 3 4 5 67869 ABC DEF G 6H II GGJ KL M DEF DEK...
Page 16: ...BE1 51 27C Controls and Indicators 2 2 Figure 2 1 Location of Controls and Indicators...
Page 20: ...BE1 51 27C Controls and Indicators 2 6...
Page 22: ...BE1 51 27C Functional Description 3 2 Figure 3 2 Functional Block Diagram...
Page 32: ...BE1 51 27C Installation 4 7 Figure 4 10 Typical Internal Diagram Sensing Input Type L...