3 phase digital overload overcurrent relay / current monitoring relay / priority relay 90A – 200A

This current monitoring relay is designed by Tense Electronics to protect electrical loads (such as three-phase motors, heaters, and transformers) from high current damage. It also can monitor electrical current on a main or priority circuit. If the current exceeds a set threshold, the relay cuts off non-priority circuits to prevent breaker trips, then automatically restores them when current drops.

Key Specifications

• Current Control Range: 90A to 200A (adjustable overload value).
• Display: 3×3 digit LED display for real-time monitoring of three-phase currents.
• Asymmetry Protection: Fixed at 50% current asymmetry error.
• Delay Time: Programmable error delay time ranging from 1 second to 200 seconds.
• Mounting Type: Designed for standard DIN rail installation.
• Output Contact: 5A (1 x CO changeover contact). 

Operational Characteristics

• Operating Modes: The device features three adjustable reset modes to return to normal operation after a fault:
  • Manual: Requires physical human intervention to reset.
  • Semi-Automatic: Resets automatically under specific programmatic constraints.
  • Automatic: Disconnects and reconnects the load automatically based on user-defined cooling/return times. 
• Included Components: The package is sold as a ready-to-use solution and includes the necessary external current transformers.

Primary Application