GE 350-A9 Quick Start Manual page 46

MECHANICAL INSTALLATION
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Figure 2-17: Duplex connector dimensions (point sensor, and sensor fiber extension for
loop sensor)
The point sensor fiber includes a duplex connector to connect to the back of the 350 relay
on one end, and a compressed slim connector that connects to the sensor itself on the
other end.
Before installing the AF sensor units, ensure that all other drilling and installation is
complete to minimize possible damage to the sensitive unit and connected sensor fiber
cable. Choose a location for the sensor clear of any obstructions that could shield the
sensor from arc flash light.
Review the sensor fiber handling guidelines above.
Sensor fiber should be held in place loosely for the best long-term performance. Avoid
over-tightening ties which may deform or break the sensor fiber.
General installation:
1. Choose a location for the point sensor.
Arc flash point sensors should be installed clear of any obstructions that could shield
the sensor from arc flash light, and less than 2m (6ft 6") from any potential arc flash
source.
The sensor head should be pointed towards the most likely source of arc flash.
For further guidance selecting point sensor locations, see GET-20057 3 Series Arc
Flash Application Note.
2. Remove the slim connector from the point sensor assembly.
3. Carefully route the duplex sensor fiber from the point sensor location to the back of
the relay unit, minimizing loops and curves for the strongest possible signal. Ensure all
sensor fiber handling precautions are followed.
CHAPTER 2: INSTALLATION
350 FEEDER PROTECTION SYSTEM – QUICKSTART GUIDE