19
Figure 3b Timing Devices with No Auxiliary Contacts
Device under test
CONNECTIONS
1. Timer mode switch setting to
I
2. Connect the device to the desired outputs
TEST PROCEDURES
1. Switch on the main supply switch
2. Select timer mode to the
OFF
position
3. Ensure that the output regulators are in the zero position
4. Select the desired output range also select desired current operated time phase
5. Check that the connections are made as above and that the device is closed
6. Press output ON push-button and adjust to the desired output level
7. Press output OFF push-button
8. Select
I
position on the timer mode switch and ensure the timer is reading zero
9. Press the output ON push-button
10. Current will now flow through the device.
11. Once the device has tripped the timer will stop and the output will be
switched off
NOTE:
Timing results obtained with test currents below 20% on each ammeter range,
and on measured times of 19ms and below, are of doubtful accuracy and should
be ignored.
