Digital overcurrent relay with LED display 3×3 digits TRM-400

Load monitoring/limiting relay, 3-phase, range 290-400 A, manufacturer TENSE (Turkey)

The TRM-400 digital overload relay is designed to protect loads from damage caused by high currents while allowing operation monitoring.

• 290-400 A (adjustable overload value)
• Adjustable fault delay time
• Adjustable operating mode (automatic, semi-automatic, manual)
• When purchasing the TENSE current relay, you receive a ready-to-use device - current transformers are included.

Device usage and operating principle

1. Connect the device according to the attached electrical diagram.
2. When the wiring is ready, connect the power supply. After switching on, the set values are displayed on the screen for 5 seconds.
3. Use the "A>" regulator to set the overload value. The set value is displayed on the left screen.
4. Use the "t" regulator to set the delay time. The set value is also displayed on the left screen..

When the device is switched on:

• The relay switches on, the output contact switches to terminal 3, and the OUT indicator lights up.
• If the current exceeds the set overload value (A>), the device counts the delay time back, after which the ERR indicator lights up.
• After the set time elapses, the relay switches the contact off, switches to terminal 1, and the OUT indicator goes off.

The TRM-400 series electronic current relay is designed for automatic disconnection of consumers when the maximum allowable current is exceeded. It has a programmable switching range and the ability to set switching time and rebound time. There are 3 modes to return to the "operating" state - MANUAL, SEMI-AUTO, AUTO.

Return modes

• Manual mode: To reset the device after overload, press the Reset button. The corresponding LED lights up in this mode.
• Semi-automatic mode: Allows the device to automatically reset the system three times in case of overload and then waits for manual reset on the next fault. The corresponding LED lights up.
• Automatic mode: The device allows the system to automatically reset every time an overload fault occurs. The corresponding LED lights up.

Note: To change the mode, hold the SELECT button for 10 seconds. The corresponding LED lights up when the mode changes.

Technical parameters

• Operating voltage: 150-260 VAC
• Operating frequency: 50/60 Hz
• Power consumption: <6 VA
• Operating temperature: -20 °C ... +55 °C
• Display: 3 × 3 digits, 5 LEDs
• Overload value (A>): 290-400 A
• Delay time: 1-200 s
• Connection type: clamp connection
• Contacts: 5 A / 250 V AC (active load)
• Cable diameter: 2.5 mm²
• Weight: max. 250 g
• Installation: DIN rail
• Maximum altitude: <2000 m

Note: TRM-50, TRM-100, TRM-200, and TRM-300 can only be used with the included current transformers.

TRM-400 can be used with the 400/5 current transformer included with the TRM-400.

Basic