ABB REM610C55HCNN02 motor protection relay

ABB REM610C55HCNN02 motor protection relay

ABB REM610C55HCNN02 belongs to the REM610 series motor protection relay, which is widely used in the industrial field. It is specially designed for the protection of medium and large asynchronous motors, which can effectively ensure the safe and stable operation of motors. It can also be used for the protection of equipment such as feeding cables and power transformers

Core functions

Protection function

Thermal overload protection: detects short-term and long-term overload, calculates thermal stress based on the square value of the motor's thermal capacity and load current, and can set parameters such as safe stalling time, weighting coefficient, time constant multiplier, etc.

Start monitoring: It can be based on thermal stress calculation or timed overcurrent protection to prevent damage to the motor during the starting process due to overload or short circuit faults.

Short circuit protection: detects overcurrent caused by phase to phase, winding to winding, and phase to ground short circuits, with instantaneous or timed characteristics.

Undercurrent protection: detects faults such as load loss, suitable for applications where undercurrent is considered a fault.

Ground fault protection: detects phase to ground current, has timing characteristics, and can be set to instantaneous action.

Unbalance protection: Based on negative sequence current detection of phase imbalance, it prevents rotor overheating.

Phase sequence protection: detects motor reverse rotation caused by phase sequence errors.

Accumulated startup time counter: prevents motor overheating caused by too frequent startup attempts.

Circuit breaker fault protection: detects the situation where the circuit breaker should have acted but did not.

Temperature protection (optional): Detect the temperature of motor bearings and windings through RTD sensors or thermistors.

Measurement function: It can measure various parameters such as phase current, zero sequence current, negative sequence current, thermal level, start-up time, cumulative start-up time, restart suppression time, motor running time, etc.

Control function: Supports local and remote control of switchgear, including opening and closing operations of circuit breakers and isolating switches, with interlocking function to prevent misoperation.

Data recording and event recording

Disturbance recorder: It can record data from 4 analog channels and up to 8 user selectable digital channels. The sampling frequency varies according to the rated frequency, the recording length can be adjusted, and there are various triggering methods.

Event recording: Up to 100 event codes and timestamps can be recorded, including events such as startup and tripping during the protection phase.

Communication function: Equipped with front optical communication port (infrared) and optional rear communication module, supporting communication protocols such as SPA bus, IEC 60870-5-103, Modbus (RTU and ASCII), etc.

Technical Parameter

Power supply: Supports multiple AC and DC auxiliary voltages, with different power consumption in static and operating states, and a maximum ripple of 12% of the DC value.

Input

Current input: rated frequency 50/60Hz, rated current 1A or 5A, with certain thermal and dynamic current tolerance capabilities.

Digital input: Supports multiple voltage levels, activation threshold and operating range vary depending on the model, with low current and power consumption.

Output

Signal output: Rated voltage 250V AC/DC, with certain continuous carrying capacity, short-term carrying capacity, and breaking capacity.

Power output: Parameters are similar to signal output and are suitable for controlling devices such as circuit breakers.

Environmental conditions: The recommended continuous operating temperature range is -10...+55 ° C, the extreme temperature range (short-term) is -40...+70 ° C, the storage and transportation temperature range is -40...+85 ° C, and the humidity is less than 95% RH.

Electromagnetic compatibility: Passed multiple electromagnetic compatibility tests, including 1MHz pulse interference, electrostatic discharge, radio frequency interference, etc.

Configuration and parameter settings

Setting group: Provides two optional setting groups that can be switched through HMI or serial communication, including parameters such as safety stall time, weighting coefficient, startup values and operation time for various protection stages.

Switch group: including SGF, SGB, SGR, SGL and other switch groups, used to configure the functions of relays, digital inputs, signal routing of output contacts, and LED indications.

Parameterization: External parameterization can be performed through HMI or using Relay Setting Tool, with set values within a specified range and some parameters requiring password protection.

Installation steps

1、 Preparation before installation

Environmental inspection: Ensure that the installation location meets environmental requirements, with a working temperature range of -10...+55 ° C, relative humidity<95% (no condensation), and avoid harsh environments such as severe vibration, dust, corrosive gases, etc.