Overview:
This portable autotransformer allows the PI
-
800 and PI
-
1600 circuit breaker testers to be used at
full capacity on 480 VAC lines. It provides 240 VAC at 10 kVA, and also it is housed in a rugged ABS
enclosure approximately
22”
wide x
11”
high x
22”
deep, including
2”
lids, and weighs less than 90 lbs.
Basic Description and Operation:
This instrument is housed in a rugged waterproof case with removable front and rear covers. The
input connection is by way of two 50 A male Cam
-
Lok . Female plugs are provided for the customer
to make cables as required. The input is protected by high interrupting capacity 30 ampere circuit
breaker. When input power is applied, POWER ON light is illuminated. When the circuit breaker is
energized the OUTPUT ON light is illuminated 240 VAC on two 50 A female Cam
-
Lok connectors.
In the case of long term overload and subsequent overheating of the autotransformer, thermal
overload switches will open. It is the responsibility of the user to remove the load if this occurs. The
unit should remain powered up so the fans may remove heat from the enclosure.
It is extremely important to check the input voltage before applying power that is is connected to
the AT
-
10B INPUT JACKS. If 480 VAC is applied to the OUTPUT JACKS this will present a dangerous
condition which may damage the unit or cause injury to the operator. It is good practice to connect
the unit in the following sequence:
Measure the input power source to verify it is within the limits of the AT
-
10B .
Connect the input ground terminal to a solid earth ground.
Connect the output ground terminal to the PI
-
800.
Connect the power leads from the AT
-
10B output jacks to the PI
-
800 input jacks.
Connect the input leads of the AT
-
10B to a de
-
energized power source.
After both Input and Output cables are properly connected energize the power source and turn
on AT
-
10B using the circuit breaker and verify that both the Power On and Output On lamp
lights illuminate.
Electrical Test Instruments, LLC
AT
-
10B
10KVA Autotransformer
