Application Notes: Monitoring Lighting Circuits and Heaters

Monitoring Lighting Circuits and Heaters

Theory of operation for go/no switches:

Resistive loads such as lighting circuits and resistance heaters do not require adjustable thresholds to measure operation. To effectively monitor these loads, the VERIS 800 series current switch provides a cost-effective means to get positive status to an automation panel. The 800 series switch turns on at ~ 1/2 amp and remains on (closed) until the amp draw drops to 0 amps.

Advantages of Veris 800 switches over relay contacts:

Relay contacts will indicate contact closure, but do not measure actual loads (amps) and so will not detect failures between the relay and the load such as broken wires, etc.
Many lighting loads are 277 volts and thus require an expensive specialized relay to determine status. Veris sensors work on any voltage up to 600 volts
The small size and low cost of the 800 allow the user to install it in almost any location

The VERIS 800 series provides the ideal solution for monitoring lighting circuits and heating elements. Its small size and low turn-on point make it the perfect solution for adding monitoring to new or existing loads. It turns on at 1/2 amp and remains on (closed) until the load drops to 0 amps.

Installation instructions:

Disconnect the power to the lighting circuit or heater
Disconnect one power wire between the relay or switch and the load and insert the wire through the center hole of the 800
Reconnect the primary power wire to the load
Connect the output terminals from the 800 series to a digital or binary input at the automation panel
Turn the lights or heater on and verify proper operation

Applications are suggestions. Field applications vary; since manufacturer does not install the devices, it is up to the installer to ensure suitability and compliance to appropriate codes.