Digital load relay TRM-12 - Three-phase, 0.1-25 A, LED display, timer

Product description

The TENSE TRM-12 digital thermal relays are designed to protect loads from damage caused by high currents.
They allow configuration of overcurrent, fault delay time, and operating mode.

They have internal current transformers and a 3×3 digit LED display for clear operation monitoring.

Main features

• Adjustable overcurrent value: 0.1-25 A

• Fixed current asymmetry: 50%.

• Adjustable error delay time: 0.1-20 s

• Operating modes: Manual, Semi-automatic, Automatic

• Three-phase operation with built-in current transformers

• LED status indication: OUT, ERR

• Display range: 3×3 digits + 5 LEDs

Operating principle

• When the power supply is turned on, the relay switches on and activates the output contact, the OUT indicator lights up.

• When the set overcurrent value is exceeded, the delay time starts counting down and the ERR indicator lights up.

• After this time, the relay switches off, the output contact switches off, and OUT turns off.

• The relay reset is automatic or manual, depending on the selected mode:

  • Manual: manual reset required after an error.

  • Semi-automatic: automatic reset 3 times, then manual reset

  • Automatic: automatic reset whenever an error occurs

50% asymmetry

• If the difference between the highest and lowest phase current exceeds 50%, the relay enters asymmetry error mode.

• Failure is indicated by flashing displays and the ERR indicator.

• Manual reset is required to return.

• Currents below 2 A are not monitored.

Technical parameters

• Supply voltage: 150-260 V AC, 50/60 Hz

• Power consumption: < 6 VA

• Operating temperature: -20 °C to +55 °C

• Display: 3×3 digits, 5 LEDs

• Overcurrent adjustment: 0.1-25 A

• Delay time: 0.1-20 s

• Connection type: terminal

• Output contacts: 5 A / 250 V AC

• Cable diameter: 2.5 mm²

• Mounting: DIN rail

• Weight: max. 250 g

• Altitude: < 2000 m

Applications

• Automatic shutdown of devices when maximum current is exceeded

• Protection of motors, heaters, transformers, and other three-phase equipment

• Prevent equipment damage during asymmetric phase load