139-H-FLC-NFS

About the 139-H-FLC-NFS

The primary function of the 139-H-FLC-NFS relay is to protect up to three-phase AC motors in a setting in which damages may occur. Along with the motor protection feature this relay is equipped with a number of features that can protect mechanical equipment that is used with this relay by giving an alarm before any possible damages occur due to a process malfunction, by diagnosing problems after a fault has occurred and by allowing authentication of the correct relay operation during routine maintenance of the relay. It should be noted that one relay is required per chosen motor. 

Along with the front panel controls on the 139-H-FLC-NFS relay there are several selector switches located internally that are used to program to the user's chosen requirements. Field changes for this device can be made by removing the cover of the relay and then altering the settings of the switches. Please make sure that when changing the settings all of the switches are firmly pushed in. 

One option that is available on the 139-H-FLC-NFS relay is an emergency restart. The emergency restart can override the memory after a lockout trip and a key switch can be connected across terminals three and four. Please ensure that the key switch is close to the relay to make sure that there are no long wire runs. 

Fourteen light indicators make up the front panel of this relay. Some of the indicators are a trip light, reset push button, unbalance control, and more. Each of the indicators has a different primary function. For example, the unbalance control indicator will set the level of the unbalance between phases to help indicate a potential unbalance fault.