18
Figure 3a Over Current Relays
Relay coils under test
Relay
Contacts
CONNECTIONS
1. Timer mode switch setting to N/C or N/O
2. Relay contacts to red and blue contact terminals
3. Relay coils to the desired outputs
TEST PROCEDURES
1. Switch on the main supply switch
2. Select timer mode switch to the
OFF
position
3. Ensure that the output regulators are in the zero position
4. Select the desired output range
5. Check that connections are made as above
6. Press output ON push-button and adjust output regulators until the desired
output levels are indicated
7. Press output OFF push-button
8. Select
N/O or N/C
position on the timer mode switch and ensure timer is
reading zero
9. Press output ON push-button
10. Relay will trip after a set time, which will be displayed on the timer, and the
outputs will be switched off automatically
