Testing
7-2
Undervoltage Trip
Step 1.
Monitor the UND VOLT output contacts, terminals 40 and 41, for the trip condition.
Step 2.
Reduce phase A, line-to-neutral voltage from 69.3 V
RMS
to 50 V
RMS
. The relay should be flashing
the undervoltage tripped condition on the front panel LCD. Return the voltage to 69.3 V
RMS
and
the LCD should return to the un-tripped ON display.
Overfrequency Trip (Line-To-Neutral Frequency Sensing)
Step 1.
Monitor the OVR FREQ output contacts, terminals 43 and 44, for the trip condition.
Step 2.
Increase 3-phase voltage frequency from 60 Hz to 62 Hz. The relay should be flashing the
overfrequency tripped condition on the front panel LCD. Return the frequency to 60 Hz and the
LCD should return to the un-tripped ON display.
Underfrequency 1 And Underfrequency 2 Trips
Step 1.
Monitor the UND FREQ1 output contacts, terminals 46 and 47, for the underfrequency 1 trip
condition.
Step 2.
Reduce 3-phase voltage frequency from 60 Hz to 58.5 Hz The relay should be flashing the
underfrequency 1 tripped condition on the front panel LCD. Return the frequency to 60 Hz and
the LCD should return to the un-tripped ON display. Return the frequency to 58.5 Hz to re-
instate the underfrequency 1 trip condition.
Step 3.
Monitor the UND FREQ2 output contacts, terminals 49 and 50, for the underfrequency 2 trip
condition. It should be open at this point in the test.
Step 4.
Further reduce the frequency from 58.5 Hz to 57.5 Hz. The output contacts should close to
indicate the underfrequency 2 tripped condition. Note that the display will still be flashing the
underfrequency 1 trip message as it did not reset prior to this lower frequency test. Increase
the frequency back to 58.5 Hz and the output contacts should open. Return the frequency to
60 Hz and the display should return to the un-tripped ON display.
Phase Balance Trip
Step 1.
Monitor the PH BAL output contacts, terminals 55 and 56, for the trip condition.
Step 2.
Use the front panel keypad to scroll though the LCD based setup menu and enable the Phase
Balance Trip function, but leave the trip, reset and time delay values at their default levels.
Step 3.
Increase phase A, line-to-neutral voltage from 69.3 V
RMS
to 80 V
RMS
. The relay should be
flashing the phase balance tripped condition on the front panel LCD. Return the voltage to 69.3
V
RMS
and the LCD should return to the un-tripped ON display.
Step 4.
Disable the Phase Balance Trip function using the front panel keypad.
Overvoltage Trip (Line-To-Line Voltage Sensing)
Step 1.
Use the front panel keypad to change from 3-phase line-to-neutral sensing to 3-phase line-to-
line sensing.
Step 2.
Monitor the OVR VOLT output contacts, terminals 37 and 38, for the trip condition.
Step 3.
Increase phase A, line-to-neutral voltage from 69.3 V
RMS
to 100 V
RMS
. (The relay is sensing line-
to-line voltage but this test setup is measuring line-to-neutral voltage. If you prefer, you may
change the voltmeter measurement points for line-to-line and substitute line-to-line voltages
(120 V
RMS
to 173 V
RMS
)). The relay should be flashing the overvoltage tripped condition on the
front panel LCD. Return the voltage to 69.3 V
RMS
and the LCD should return to the un-tripped
ON display.
Summary of Contents for BE3-GPR
Page 15: ...General Information 1 8 ...
Page 19: ...General Information 1 12 ...
Page 29: ...General Information 1 22 Figure 1 14 Time Characteristic Curve A Standard Inverse 99 1621 ...
Page 30: ...General Information 1 23 Figure 1 15 Time Characteristic Curve B Very Inverse 99 1376 ...
Page 31: ...General Information 1 24 Figure 1 16 Time Characteristic Curve C Extremely Inverse 99 1377 ...
Page 32: ...General Information 1 25 Figure 1 17 Time Characteristic Curve G Long Time Inverse 99 1622 ...
Page 42: ...Functional Description 3 7 Figure 3 3 Selection Menu Sheet 1 of 6 ...
Page 43: ...Functional Description 3 8 Figure 3 4 Selection Menu Sheet 2 of 6 ...
Page 44: ...Functional Description 3 9 Figure 3 5 Selection Menu Sheet 3 of 6 ...
Page 45: ...Functional Description 3 10 Figure 3 6 Selection Menu Sheet 4 of 6 ...
Page 46: ...Functional Description 3 11 Figure 3 7 Selection Menu Sheet 5 of 6 ...
Page 47: ...Functional Description 3 12 Figure 3 8 Selection Menu Sheet 6 of 6 ...
