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Product Overview: REM610 Motor Protection Relay
The REM610 is a multifunction motor protection relay designed to offer comprehensive protection for motors in a wide variety of applications. This relay utilizes a microprocessor-based system, providing continuous self-supervision to ensure reliable performance. The HMI (Human Machine Interface) features an easy-to-read LCD display, allowing for safe and convenient local use.
The REM610 can be controlled locally through serial communication with a computer or remotely via the rear communication connector, integrating seamlessly with control and monitoring systems.
Key Features of REM610
- Motor Protection Functions:
- Three-phase motor start-up supervision based on thermal stress calculations with speed switch blocking ability.
- Overcurrent protection with definite-time characteristic and speed switch blocking ability.
- Short-circuit protection with instantaneous or definite-time characteristics.
- Undercurrent protection (loss of load) with definite-time characteristics.
- Non-directional earth-fault protection with definite-time characteristic.
- Thermal overload protection for three-phase motors.
- Unbalance protection based on negative-phase-sequence current with inverse definite minimum time characteristic.
- Phase reversal protection using negative-phase-sequence current.
- Cumulative start-up time counter with restart inhibit function.
- Circuit-breaker failure protection.
- Temperature protection with multiple stages.
- Emergency start function.
- Optional RTD module with six measuring inputs.
- Support for PTC thermistors and various RTD sensors.
- Additional Inputs and Outputs:
- Four accurate current inputs for precise monitoring.
- Three galvanically isolated digital inputs (two standard, one from optional RTD module).
- Three normally open power output contacts.
- Two change-over signal output contacts.
- Digital input for time synchronization.
- Disturbance Recorder:
- Records up to 80 seconds of data.
- Triggers from internal or digital input signals.
- Tracks four analog channels and up to eight digital channels.
- Adjustable sampling rate and non-volatile memory for event logging.
- HMI Features:
- Alphanumeric LCD display with navigation buttons.
- Eight programmable LEDs for status indication.
- Multi-language support.
- User-selectable password protection for the HMI.
- Communication:
- Optical front communication via cable or wirelessly.
- Rear communication module supports various protocols like SPA-bus, IEC 60870-5-103, or Modbus.
- Battery back-up for real-time clock, ensuring continuous operation.
Applications of REM610
The REM610 is designed for the protection of standard medium and large MV asynchronous motors. It is ideal for use in pump, fan, mill, and crusher applications, protecting motors during start-up, normal operation, idling, and cooling down. The relay also provides protection for feeder cables and power transformers, safeguarding them against thermal overloads, overcurrents, and earth faults.
With its extensive range of protection functions, the REM610 offers a complete solution to prevent motor damage in diverse industrial settings. It can be used with both circuit-breaker controlled and contactor controlled drives, ensuring flexibility across various systems.
Protection Functions and IEC/IEEE Codes
The REM610 includes a wide array of protection functions, each represented by standard IEC symbols and IEEE device numbers:
| Function | IEC Symbol | IEEE Device No. |
|---|---|---|
| Three-phase thermal overload protection | θ> | 49M |
| Motor start-up supervision (thermal stress) | Is2 ts | 48/14 |
| Definite-time overcurrent protection | Is> | 51/14 |
| Short-circuit protection | I>> | 50/51 |
| Unbalance protection | I2> | 46 |
| Phase reversal protection | REV | 46R |
| Undercurrent (loss of load) protection | I< | 37 |
| Earth-fault protection | I0> | 50N/51N |
| Cumulative start-up time counter | ∑tsi | 66 |
| Circuit-breaker failure protection | CBFP | 62BF |
| Temperature protection (RTD or thermistors) | ThA>, ThB> | 49/38 |
Inputs and Outputs Overview
- Inputs:
- Four energizing inputs for earth-fault current monitoring.
- Two digital inputs and three optional digital inputs controlled by external voltage.
- Outputs:
- Three power outputs (PO1, PO2, PO3).
- Two signal outputs (SO1, SO2), with configurable functions for desired operation.
- Switch groups for routing internal signals from protection stages, motor start-up, and external trip signals.
Technical Specifications
- Nominal Voltage: 24 V DC (depending on the model)
- Nominal Current: 100 mA
- Display: Alphanumeric LCD with backlight
- HMI Buttons: Navigation buttons for easy configuration
- Protection Relay Type: Multifunction protection with extensive features
- Communication Protocols: Modbus (RTU/ASCII), IEC 60870-5-103, SPA-bus
- Dimensions: Compact design for easy installation
REM610 motor protection relay’s dimensions:
| Component | Dimensions |
|---|---|
| Width (Frame) | 177 mm |
| Width (Case) | 164 mm |
| Height (Frame) | 177 mm (4U) |
| Height (Case) | 160 mm |
| Depth (Case) | 149.3 mm |
| Weight (Relay) | ~3.5 kg |
| Weight (Spare Unit) | ~1.8 kg |
Ordering information
The following accessories are available:
| Accessory | Order Number |
|---|---|
| Mounting Kits | |
| Semi-flush mounting kit | 1MRS050696 |
| Inclined (/25º) semi-flush mounting kit | 1MRS050831 |
| Wall mounting kit | 1MRS050697 |
| 19” Rack mounting kit (two relays side-by-side) | 1MRS050695 |
| 19″ Rack mounting kit (single relay) | 1MRS050694 |
| 19″ Rack mounting kit (single relay and RTXP18) | 1MRS090938 |
| 19″ equipment frame mounting kit (Combiflex), single relay and RTXP18 | 1MRS090924 |
| 19″ equipment frame mounting kit (Combiflex), single relay | 1MRS050779 |
| Communication Cables and Modules | |
| Front communication cable | 1MRS050698 |
| Communication modules: | |
| – Plastic fibre module | 1MRS050889 |
| – RS-485 module | 1MRS050892 |
| – Plastic and glass fibre module | 1MRS050891 |
For detailed information, please refer to the official manual via the following link:
REM610 Technical Reference Manual (PDF)
This manual provides comprehensive details on the REM610 motor protection relay, including its features, specifications, and configuration options.
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