BE1-51/27R - Tests And Adjustments
5-15
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.
Содержание BE1-51/27R
Страница 14: ...BE1 51 27R General Information 1 9 Figure 1 1 Style Number Identification Chart...
Страница 36: ...BE1 51 27R General Information 1 31 Figure 1 38 Timing Type E7 BS 142 Extremely Inverse Drawing No 99 1097...
Страница 54: ...2 2 BE1 51 27R Human Machine Interface Controls And Indicators Figure 2 1 Location of Controls and Indicators...
Страница 59: ...3 2 BE1 51 27R Functional Description Figure 3 1 Functional Block Diagram...
Страница 69: ...BE1 51 27R Installation 4 7 Figure 4 8 Typical Internal Diagram Sensing Input Type M or N...
Страница 76: ...4 14 BE1 51 27R Installation Figure 4 14 Relay Signals and Current Pickup Example For 3 Phase Fault XE 0 65 X D...