- The COMPANO 100 test set can output life-hazardous voltages and currents.
- Before operating any such electrical equipment, carefully read the Safety Instructions chapter in this manual (see Safety instructions).
| WARNING | ||
| Death or severe injury can occur if the appropriate safety instructions are not observed.
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This chapter provides you with an example of how to measure the burden of a voltage/potential transformer (VT/PT).
Open the MCB (miniature circuit breaker) on the VT/PT’s secondary side.
Connect the COMPANO 100 test set’s output V OUT to the VT/PT’s secondary wiring behind the open MCB.
Attention:
Make sure you do not accidentally inject voltage to the secondary side of the VT/PT (to the VT/PT’s secondary contact a/X1, for example) as this would generate an unexpected high voltage on the primary side of the transformer.
Make sure the MCB is open.
Connect the COMPANO 100 test set’s input IN 1 to the same point, using a second set of connection wires.
Turn off the output I OUT by first pressing the I OUT key, and then by pressing the "Off" soft key.
V OUT is configured to be AC by default.
In the QUICK application module at V OUT, set the nominal secondary voltage of your choice.
Press the Calculated measurement key 
. Then press the On soft key.
Configure the calculated measurement for apparent power by using the voltage at V OUT as operand 1, and the input at IN 1 as operand 2.
Because one operand is a current and the other one a voltage, the Calculation setting provides an apparent power S option.
Now return to the QUICK application module, and inject the nominal secondary nominal voltage for 2 seconds. The measurement shows the secondary burden of the CT.
This chapter provides you with an example how to measure the burden of a current transformer (CT).
| WARNING | ||
| Death or severe injury can occur if the appropriate safety instructions are not observed.
|
This chapter provides you with an example how to measure the burden of a current transformer (CT). If you want to measure the burden of a CT with COMPANO 100, it is not necessary to open the secondary wiring. Change from primary injection to secondary injection in order to obtain higher secondary currents for a longer period of time.
Note: perform a DC current offset calibration on the current clamp before carrying the measurement.
Connect the current output I OUT to the CT's secondary terminals S1/X1 and S2/X2.
In the QUICK application module at I OUT, set the nominal secondary current of your choice.
Press the Calculated measurement key . Then press the On soft key.
Configure the calculated measurement for apparent power by using the voltage at IN 1 as operand 1, and the input at IN 2 as operand 2.
Because one operand is a current and the other one a voltage, the Calculation setting provides an apparent power S option.
Now return to the QUICK application module, and inject the nominal secondary nominal current for 2 seconds. The measurement shows the secondary burden of the CT.
Note: If you use the CPOL polarity checker (that is, the predecessor of CPOL2), the test procedure is identical.