TRM-12 Digital Load Relay - Three-Phase, 0.1-25 A, LED Display, Timer

Product Description

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

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

Key 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

• Status indication LEDs: OUT, ERR

• Display range: 3×3 digits + 5 LEDs

Operating Principle

• When power is connected, the relay engages and activates the output contact, the OUT indicator lights up.

• When the set overcurrent value is exceeded, the delay time begins to count down, and the ERR indicator lights up.

• After the time has elapsed, the relay turns off, the output contact disconnects, and OUT turns off.

• The relay resets automatically or manually depending on the selected mode:

  • Manual: manual reset required after an error.

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

  • Automatic: automatic reset every time an error occurs

50% Asymmetry

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

• The fault is indicated by flashing displays and the ERR indicator.

• A manual reset is required for return.

• Current below 2 A is not monitored.

Technical Parameters

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

• Consumption: < 6 VA

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

• Display: 3×3 digits, 5 LEDs

• Overcurrent setting: 0.1-25 A

• Delay time: 0.1-20 s

• Connection type: terminal

• Output contacts: 5 A / 250 V AC

• Wire diameter: 2.5 mm².

• Weight: max. 250 g

• Altitude: < 2000 m

Application:

• Automatic disconnection of devices when maximum current is exceeded

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

• Preventing equipment damage during asymmetric phase loading