Satec PM130E, Installation And Operation Manual

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Chapter 2 Installation 9
2.2.2 Current Inputs
To ensure accurate readings, the input current should not exceed
1.5A RMS for the 1A CT secondary, or 7.5A RMS for the 5A CT
secondary.
The PM130 does not have current terminals. To connect to the
external CT, you must pass the external CT wire through the
instrument CT core (see Figure 2-4).
In the case of a retrofit where each external CT ends with two
wires, pass one wire through the core and connect it to one of the
instrument termination screws; connect the second wire from the
termination screw to the external CT to close the loop.
One wire
must pass through the core; observe the arrow which indicates
the current direction (see Figure 2-4).
2.2.3 Ground
Connect the ground PM130 terminals of the power supply and
communication connectors to the switchgear earth ground using
1.5 mm
2
/14 AWG dedicated wire.