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.

Preparation of Tools and Materials: Prepare suitable tools such as screwdrivers, wire strippers, and crimping tools, as well as wires that meet specifications (selected according to terminal requirements, such as terminal X2.1 for 0.5... 6.0mm ² wires, X3.1 and X4.1 for 0.2... 2.5mm ² wires), wiring terminals, and other materials.

Equipment inspection: Open the box and check if the appearance of the relay is intact, verify if the model (REM610C55HCNN02) and accessories are complete, including installation brackets, instructions, etc.

2、 Mechanical installation

Choose installation method: Select the installation method according to actual needs, supporting semi embedded installation, wall mounted installation, 19 "rack installation, etc. Corresponding installation kits can be used (such as semi embedded installation kit 1MRS050696, 19" rack installation kit 1MRS050695, etc.).

Fixed equipment:

If it is a rack installation, place the relay smoothly into the corresponding position of the 19 "rack, fix it on the rack with screws, and ensure that the installation is firm and not loose.

If it is wall mounted or embedded installation, use expansion screws or fixing screws to fix the installation bracket to the wall or cabinet according to the size of the installation hole, and then fix the relay to the bracket.

3、Electrical connection

（1） Power connection

Find the power terminal at the back of the relay (X4.1-1 is "+", X4.1-2 is "-").

According to the rated auxiliary voltage indicated on the relay (this model is 100-240V AC/110-250V DC), connect the corresponding power supply wires to ensure correct positive and negative polarity.

The stripping length of the wire is moderate (about 5-8mm), and after inserting the terminal, tighten the screw to ensure good contact without looseness or virtual connection.

（2） Current input connection

Phase current connection: Connect the secondary side of the current transformer (CT) to the phase current input terminal. The specific terminal definitions are as follows:

X2.1-1/2: Connect L1 phase current

X2.1-3/4: Connect L2 phase current

X2.1-5/6: Connect L3 phase current

Grounding fault current connection: According to the CT type (which has a grounding fault current input of 5A), connect the grounding fault current circuit to terminals X2.1-7/8.

Ensure correct polarity of CT wiring to avoid phase errors affecting protection function.

（3） Digital input connection

The digital input terminals are located at X4.1 and X3.1 (when RTD module is optional), as follows:

X4.1-23/24: Connect DI1

X4.1-21/22: Connect DI2

If equipped with RTD modules, X3.1-1/2, X3.1-3/4, and X3.1-5/6 are respectively connected to DI3, DI4, and DI5

According to the rated voltage of the digital input (this model is 110/125/220/250V DC), connect the external control signal wire, pay attention to wire insulation, and avoid short circuits.

（4） Output contact connection

Power output (PO) and signal output (SO):

PO1（X4.1-16）、PO2（X4.1-14）、PO3（X4.1-12/13） For power output, used to control devices such as circuit breakers, connected to external circuits according to control requirements.

SO1（X4.1-9/10/11）、SO2（X4.1-6/7/8） For signal output, used for alarm or status indication, connected to indicator lights, alarms, etc.

IRF contacts: X4.1-3 (common terminal), X4.1-4 (closed when faulty), X4.1-5 (closed when normal), connected to the fault alarm circuit.