BE1-25/79TR Testing
5-10
Voltage Monitor
Step 1.
Perform the preliminary setup procedures.
Step 2.
Vary the bus and line voltage and observe that the DB, DL, LB, and LL LEDs light and
extinguish at the proper levels and that the relay Status display shows the correct voltages for
each condition. The displayed voltage should be within 5% of the applied voltage.
Voltage Difference Inhibit
Step 1.
Perform the preliminary setup procedures.
Step 2.
Apply sufficiently high, identical voltages to the line and bus inputs so that the relay LL and LB
LEDs are ON.
Step 3.
Increase or decrease one of the input voltages until the LL and LB LEDs start flashing.
The difference between the bus and line voltages should equal, ± 5%, the DELTA V setting of
the relay.
Step 4.
Trip the test set breaker and verify that closure of the sync contacts does NOT occur.
Sync LB and LL Inhibit
Step 1.
Perform the preliminary setup procedures.
Step 2.
Apply voltages that are lower than the relay LL and LB settings.
The relay LL and LB LEDs should NOT be ON.
Step 3.
Trip the test set breaker and verify that no sync contact closure occurs.
Phase Accept
Step 1.
Perform the preliminary setup procedures.
Step 2.
Apply identical line and bus voltages that are high enough to light the relay LL and LB LEDs.
Step 3.
Trip the test set breaker.
Step 4.
Adjust the phase angle of the line input to a leading value greater than the relay phase window
setting.
Observe that the LL and LB LEDs flash ON and 0FF.
Step 5.
Reduce the line voltage phase angle until the relay voltage LEDs stop flashing.
After the sync time delay expires, the relay 25 LED should be ON and the sync contacts should
be closed. The measured phase angle should be ±1 degree of the relay phase window setting.
Step 6.
Operate the relay Status/EDIT switch until the phase angle is displayed.
The displayed phase angle should be ±1 degree of the measured phase angle.
Step 7.
Close the test set breaker and observe that the sync contacts open.
Summary of Contents for BE1-25/79TR
Page 1: ...05647 6 10 07 14 19 241 5 0 4 15 0 4 64 Publication 9 2787 00 990 Revision B 07 95...
Page 27: ...BE1 25 79TR Controls and Indicators 2 7 Figure 2 7 Front Panel Vertical Mount Relay...
Page 29: ...BE1 25 79TR Functional Description 3 2 Figure 3 1 Functional Block Diagram...
Page 60: ...BE1 25 79TR Installation 4 8 Figure 4 9 RS 232 Interconnection Diagram For IBM Type Computers...
Page 63: ...BE1 25 79TR Testing 5 2 REAR VIEW FRONT VIEW Figure 5 1 BE1 25 79TR Test Simulator...
Page 64: ...BE1 25 79TR Testing 5 3 Figure 5 2 BE1 25 79TR Test Simulator Schematic Diagram Sheet 1 of 2...
Page 65: ...BE1 25 79TR Testing 5 4 Figure 5 3 BE1 25 79TR Test Simulator Schematic Diagram Sheet 2 of 2...
Page 66: ...BE1 25 79TR Testing 5 5 Figure 5 4 Test Setup Diagram...