Relay Operating Condition; Current Transformer (Ct) Circuit; Insulation And Dielectric Strength Testing; Cables And Connectors - GE Agile P50 Series Technical Manual

P50 Agile P153
Before energizing the following should be checked
1. Voltage rating and polarity.
2. CT circuit rating and integrity of connection.
3. Protective fuse rating.
4. Integrity of the earthing connection.
5. Voltage and current rating of external wiring, applicable as per application.
2.3.1.1

Relay Operating Condition

The equipment should be operated within the specified electrical and environmental limits.
2.3.1.2

Current Transformer (CT) Circuit

Warning:
2.3.1.3

Insulation and dielectric strength testing

Insulation testing may leave capacitors charged up to a hazardous voltage. At the end of each part
test, the voltage should be gradually reduced to zero, to discharge capacitors, as this may result in
damage.
2.3.2

Cables and Connectors

This section describes the type of wiring and connections that should be used when installing the
device. For pin-out details please refer to the wiring diagrams.
P153/EN M/B
Do not open the secondary circuit of a live CT as the high voltage produce
may be lethal to personnel and could damage insulation. For your safety, the
secondary of the line CT must be shorted before opening any connection to it
Caution: Before carrying out any work on the equipment you should be
familiar with the Safety Section and the ratings on the
equipment's rating label.
10 Installation
10-7