NDB Technologies CTT Series User Manual page 22

8.2 Automatic Mode Operation
This section explains how to operate the CTTx5 and CTTx2 in automatic mode. It is
assumed the CT under test is not installed in a power transformer, circuit breaker
or any other larger system.
8.2.1 Connections
1. Before connecting the CTT instrument to any other cable/equipment, make
sure the ground post is earthed properly using the provided ground cable.
2. Connect the CTT to a power source and then turn on the instrument.
3. Connect X1, X2, X3, X4 and X5 clips (CTTx5) to the CT's secondary terminals to
test (X1 and X2 for CTTx2).
4. Connect H1 and H2 clamps to the primary side of the CT under test. Make sure
to respect the CT polarity. CTs are typically marked with label on their H1 side.
5. In order to reduce nearby induction effects, the terminal on which is connected
the H2 clamp, must be shorted to ground.
3
H1
4
C T T S e r i e s
2
1
CTTx5 only
4
- U s e r M a n u a l
5
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