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

Load control/limitation 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 providing operational control.

• 290-400 A (adjustable overload value)
• Adjustable fault delay time
• Adjustable operating mode (automatic, semi-automatic, manual)
• When you purchase a 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 wiring diagram.
2. Once wiring is complete, connect the power supply. After switching on, the display will show the set values for 5 seconds.
3. To set the overload value, use the "A>" controller. The set value is displayed on the left display.
4. Use the "t" controller to set the delay time. The set value is also displayed on the left display.

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 down the delay time, and then the ERR indicator lights up.
• When the set time has elapsed, the relay switches off the contact, switches to terminal 1, and the OUT indicator turns off.

The TRM-400 series electronic current relay is designed for automatic disconnection of consumers if the maximum permissible currents are exceeded. It has a programmable activation range, as well as the ability to set the activation time and reverse activation time. There are 3 modes to return to "working" state - MANUAL, SEMI-AUTO, AUTO.

Reset modes

• Manual mode: To restore device operation after an overload, the Reset button must be pressed. In this mode, the corresponding LED indicator lights up.
• Semi-automatic mode: This allows the device to automatically reset the system three times when an overload occurs, and then, upon the next failure, wait for a manual reset. The corresponding LED lights up.
• Automatic mode: The device allows the system to automatically reset every time an overload error occurs. The corresponding LED lights up.

Note: To change the mode, hold the SELECT button pressed for 10 seconds. When the mode is changed, the corresponding LED lights up.

Technical parameters

• Operating voltage: 150-260 V AC
• 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: on 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.

The TRM-400 can be used with the 400/5 current transformer, which is included with the TRM-400.

Basic