Operation; Conducting A Test; Mode Selection - AEMC 8500 User Manual

WARNING: The Digital Transformer Ratiometer DTR
is designed for use on non-energized ("dead") transformers only.
Make sure the test sample is completely disconnected from AC
power and is fully discharged.
4.1

Conducting a Test

1. Connect the DTR
transformer. Refer to Connection Examples (§ 4.3.1 and §4.4.1).
2. Turn the DTR
Selection below.
3. At Ready, press the test button to begin. Following a brief test cycle,
Ratio, Polarity and Excitation Current will be displayed.
Please refer to VT/PT Testing and CT Testing sections of this manual for
complete operating information (§ 4.3.2 and §4.4.2).
4.2

Mode Selection

The operating mode of the DTR
ment. The default test mode is VT/PT. To enter the CT Test Mode, depress
the TEST button while turning the instrument on, and hold until CT Test
Mode Selected is displayed.
• Use the VT/PT Test Mode for testing voltage and potential transformers
(maximum 44V test excitation).
• Use the CT Test Mode for testing current transformers (maximum 5V
test excitation).
• The DTR automatically reverts to the VT/PT Test Mode when power is
®
turned off.
Digital Transformer Ratiometer DTR
CHAPTER 4

OPERATION

test cables in the proper manner to a non-energized
®
ON and select the proper test mode. Refer to Mode
®
®
Model 8500
®
is configured at power-up of the instru-
Model 8500
®
9