R4780C AZBIL Protection Relay NEW

R4780C AZBIL Protection Relay NEW

Product Description:

The R4780 Protectorelay is a programmable flame safeguard controller for batch

operation of oil-fired, gas-fired, or oil/gas-fired burners with a combustion capacity

of 350 kW or more. Noteworthy features include the following:

• The progress of the control sequence is displayed on the status indicator.

• A ground fault detection circuit is built in to ensure safety if there is a ground

fault involving the valve, ignition transformer, etc.*

• Safe operation is ensured by a pilot-only proving period, even if the flame detector

has detected an ignition spark.

• The safe start circuit prevents startup if an external circuit fails or if there is a

false flame signal.

• If a lockout occurs, the combustion equipment cannot be restarted unless the

reset button is pushed manually.

• Both three-position control and proportional control of combustion are available.

* If deteriorated insulation or the like causes a ground fault in a load such as the

ignition transformer, pilot valve, or main valve, the R4780 detects the problem

and shuts down and locks out the combustion equipment even if the power does

not have hot and ground sides.