Basler Electric BE1-81O/U - Manual (Page 46)

40 9137300990 Rev N
Undervoltage Inhibit
1. Connect the relay as shown in Figure 28.
2. Adjust the front panel, Setpoint 1 controls to the following settings:
•
Over/Under Selector Switch: Under (U) position
•
Frequency Selector Switch: 60.00
•
Time Delay Selector Switch: 25
3. Apply operating power to the relay.
4. Apply 60-hertz voltage to the relay sensing input. The level of voltage must exceed the setting of the
adjustable, front-panel Undervoltage Inhibit control.
5. Decrease the level of the sensing input voltage until it is considerably less than the Undervoltage
Inhibit control setting. (BE1-81O/U relays are delivered with an undervoltage inhibit setting of 80 Vac.)
The Undervoltage Inhibit indicator should light.
6. Decrease the frequency of the sensing input voltage to 59 Hz. The Setpoint 1 Pickup indicator should
not light and the setpoint 1 output relay should not trip.
7. Increase the level of the sensing input voltage until it exceeds the level of the undervoltage inhibit
setting. The Undervoltage Inhibit indicator should turn off, the Setpoint 1 Pickup indicator should light,
and the setpoint 1 output relay should trip after the Time Delay Selector switch setting expires.
Setpoint 2, 3, and 4 Testing
Where applicable, the preceding tests can be performed for setpoints 2, 3, and 4 by reconnecting the
output connections for each setpoint and substituting the appropriate setpoint numbers in the test steps.
Testing BE1-81O/U