abs will be sufficient

to hold the 515 module securely in place. If additional fastening is desired bend out the clamping

screw tabs at both ends of the chassis at right angles.

Insert the #8 screws provided in the accessory pouch into the tapped holes with the vibration

proof nut between the tab and the panel. Tighten each screw until the end of the screw butts firmly against the front panel.

Ensure the nut is installed tightly against the bent tab. Nylon inserts in these nuts prevent them from vibrating loose.

The 515 test switch module should now be securely mounted to the panel with no movement ready for rear terminal wiring.

When completed, place the front cover over the mounted 515 test module and turn

the fasteners at both ends ¼ turn to lock it in place, as shown in Figure 3.

As a safety precaution, a ground screw located on the bottom-right of the

rear side of the module is available to be connected to panel chassis ground.

This in turn shorts the Phase 1 CT. It is essential that the CT is connected to the shorted side 

of the switch as shown on the right. Otherwise, dangerously high voltages would be present

at the open circuited current transformer. Also note that currents can be

injected into the protection relay from a secondary injection test set.

With the switch between terminals 7 and 21 open and the switch between terminals 8 and 22 closed as shown below,

a 515 test plug can be inserted between terminals 7 and 21 to monitor the CT current.

See the diagrams below for details. Note that the 515 test plug is made up of two conductors separated by an insulator.