EL731-21-00

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Protection relays & systems are used for protecting electrical networks, system components, and connected personnel from fault conditions which can cause damage or injury. The EL731-21-00 is a dual-function, backed up, surge tripping unit that provides both overcurrent and surge protection with one unit, making it ideal for industrial applications.

The EL731-21-00 unit is designed to provide flexible operation with adjustable current ratings. The unit provides primary protection based on adjustable current sensing and a secondary protection, which is short circuit current limiting. The short circuit current limiting feature works in conjunction with built-in protections that protect against both undercurrent and overcurrent events. The unit also includes adjustable delay settings. The adjustable delay settings allows users to configure the unit to provide short delay on operation with a high current and a longer delay when dealing with lower current events.

The surge protection provided by the EL731-21-00 comes from a built-in, transformer isolated surge absorber. This surge absorber works by dissipating surges in order to limit the amount of energy that reaches the protected device. The unit also includes overvoltage protection, which limits the amount of energy that can reach the protected device in the event of an overvoltage event.

In order to ensure proper operation of the unit, installation and maintenance must adhere to the instructions provided by the manufacturer. As with any protection system, the EL731-21-00 should be regularly tested to ensure it is providing adequate protection.

The EL731-21-00 protection relay & system is a reliable and cost effective way to protect personnel, equipment, and systems from hazardous conditions. The unit is designed to be easily installed and configured, making it an ideal choice for industrial applications. With its dual-function, backed up, surge tripping functionality, the EL731-21-00 is an ideal protection system for protecting industrial applications from overcurrents, overvoltages, and surge events.

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