Page 13
DPP1U SERIES
OPERATING MANUAL
P O W E R I N G T E C H N O L O G Y
Document Number: DPP1U-MAN Rev. 6
dpp1u-man-Rev6-0719.indd
Note that if power remains applied to the panel during breaker installation the alarm
LED will show red and the alarm relay will be activated until the new cables have been
connected and the breaker set to the ON position.
13.0 SETUP AND TESTING
13.1
It is not necessary to have the distribution panel mounted in a rack for initial testing. This
can be done on a bench. It is also not necessary to have loads connected to the panel for
this testing.
13.2
With the input power source off, connect the input wires to the A side of the distribution
panel. Connect ground to the chassis ground terminal. Set all circuit breakers to on.
13.3
Turn on the input power source. The A side LED should be green. If it is red, one of the
circuit breaker is tripped. If the LED is off, there is no input power to the unit. Check the
output voltage at each set of output terminals with a digital voltmeter.
13.4
With the A side LED green, use an ohmmeter to check the Form C relay contact outputs.
On J4 measure the resistance between pins 1 and 2. This should read “open”. Measure the
resistance between pins 2 and 3. This should read “short”.
13.5
On the A side trip circuit breaker no. 1. The A side LED should turn red. On J4 measure the
resistance between pins 1 and 2. This should read “short”. Measure the resistance between
pins 2 and 3. This should read “open”. Reset the circuit breaker.
13.6
On the A side check each succeeding breaker by tripping it, and verify that the LED turns
red. It is not necessary to recheck the Form C relay contacts.
13.7
Repeat the same tests of Sections 13.2 through 13.6 on the B side of the distribution panel,
use J3 to check the Form-C relay operation.
13.8
The distribution panel may now be connected to its intended application.
13.9
If the distribution panel did not operate properly in the above tests, go back and double
check the connections and the polarity of the input source to make sure it is correct.
Please note that there are no user serviceable parts inside either the modules or the shelves
and that opening either will void the warranty.
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