BE1-51/27C Tests and Adjustments
5-11
NOTE
For relays having two-phase-and-neutral sensing, three-phase sensing, or three-
phase-with-neutral sensing (sensing input types A, D, P, T, and J) remove power and
reconnect the input sensing to each of the remaining phases (See Figures 5-2 through
5-6), each time repeating Steps 1 through 10. Ensure that the voltage sense terminals
and the current sense terminals are connected to the same phase.
When all phases have been tested, the voltage control test is concluded. If the
instantaneous overcurrent option 1-1 or 1-2 is present, proceed to instantaneous
overcurrent pickup.
Voltage Control Test
This test checks the voltage control minimum and maximum limits for the voltage inhibit levels.
Step 1. Perform the preliminary instructions.
Step 2. Set the front panel
TAP
Selector to
B
.
Step 3. Adjust the front panel
TIME DIAL
to
20
.
Step 4. Adjust for an overcurrent threshold of 2 times the front panel
TAP
selector
B
setting.
Step 5. Rotate the front panel
VOLTS INHIBIT ADJ
or
VOLTAGE INHIBIT ADJ
fully CCW.
Step 6. Adjust the test voltage to its minimum voltage setting, then slowly increase the voltage until the
appropriate front panel
VOLTS INHIBIT
or
VOLTAGE INHIBIT
indicator just illuminates. Do not
disturb this setting.
RESULT:
The voltage should be <40 Vac.
Step 7. Apply input current to the relay and initiate the test setup timer.
RESULT:
The front panel
TIMING
Indicator does not illuminate, which signifies that the relay
timed output is inhibited.
Step 8. Remove input current and reset the test setup timer.
Step 9. Rotate the front panel
VOLTS INHIBIT ADJ
or
VOLTAGE INHIBIT ADJ
fully CW.
Step 10. Adjust the test voltage for a 110 Vac output, then slowly increase its output voltage until the appro-
priate front panel
VOLTS INHIBIT
or
VOLTAGE INHIBIT
Indicator just illuminates.
RESULT:
The voltage should be >120 Vac.
ADJUSTMENT OF CONTROLS FOR RELAY OPERATION
The following procedures set up the relay for use in a protective scheme. The procedures are arranged in
a logical sequence that prevents upsetting previous control settings. For relays not having certain options,
skip the corresponding adjustment paragraph. These paragraphs are identified by their headings.
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...
