TM 5-3895-374-24-1SENSOR MOUNTINGThe Sensor should be mounted so that all phase and neutral (if used) conductors pass through the Core Window onceThe Equipment Grounding Conductor (If used) must not pass through the Core Window. The neutral conductor must befree of all grounds after passing through the Core Window (Figure 3)FIGURE 3When so specified by the system design engineer, the Sensor may be mounted so that only the conductor connecting theneutral to ground at the service equipment passes through the Core Window In such cases, the Sensor must provide asignal to the particular Ground Fault Relay which Is associated with the main disconnectMaintain at least two inches clearance from the Iron core of the Sensor windings to the nearest bus bar or cable to avoidfalse tripping. Cable conductors should be bundled securely and braced to hold them at the center of the Core Window.The Sensor should be mounted within an enclosure and protected from mechanical damageIf the electrical system will be energized at any time prior to completion of the installation, the Sensor output windings mustbe short circuited by a jumper across terminals X1, X3 to X2, X4. Remove this jumper when all wiring is completed to theGround Fault Relay and the Disconnect Trip Coil.RELAY MOUNTINGThe Ground Fault Relay should be mounted in a vertical position within an enclosure with the terminal block at the lowerend The location of the relay should be such that the trip setting knob is accessible without exposing the operator tohazard from contact with live parts or arcing from disconnect operation Means have been provided so that the trip settingcan be adjusted from outside the enclosure as shown in Figure 4. To do this, the potentiometer is removed from theprinted circuit board and remounted on the inside back of the box body In the holes provided, with its terminals toward theterminal block. If needed, a shaft extension is added and knob is adjusted to recommended protrusion.(page 3-91)
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