T&R PCU2 mk5, Operating And Maintenance Manual, Page: 22 / 30

22
3.2 Timing of auto-reset/reclosing devices
3 2
LOADING UNIT
CONTROL UNIT
MAINS
SUPPLY
DEVICE
UNDER
TEST
3
2 6
7 3
2 6
7
Figure 3.2 PCU2 system with auto-reclose device
3.2.1 Timer Mode
Single contact
3.2.2 Connections
Connect current output from
loading unit to desired input on
device under test.
Connect aux contact on device
under test to contact set 1 on
PCU2.
3.2.3 Test Procedure
Switch on the main supply switch.
Set timer mode switch to the off
position.
Ensure that the output regulator is
in the zero position.
Set loading unit series/parallel
switch to appropriate settings.
Check that connections are made
as above.
Press output on push-button and
adjust output regulator until the
desired output level is indicated.
Press output off push-button.
Select the single contact position
on the timer mode switch and
ensure the timer is reading zero.
Press the output on push-button
When the device under test trips
the timer will start and the output
will be switched off automatically.
When the device auto-resets the
timer will stop.