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PQube 3 Instruction Manual
Page 25 of 103
Installing CTs with 0.333V secondary
3.1.11.2
Your PQube 3 comes standard with 8 current input channels, which are typically used to measure
L1, L2, L3, N, E, plus 3 additional single-phase channels. The current channels on your PQube 3 are
rated for 0.333V nominal input, and they are designed to be used with CTs with 0.333V secondary.
For PSL CTs, white wires are positive and black wires are
negative.
If using PSL Ultra-Precise CTs with the shielded secondary
wires, red is positive and black is negative. Connect the shield
conductor to ground. If using another manufacturer’s CTs,
verify which wires are positive and negative before installing
them.
Clamp the CT around the conductor. For all PSL CTs, the label faces towards the source.
From source
To load
Labels on CT
facing source
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