ABB REM543 is a digital relay commonly used in power systems to protect and control high-voltage motors. Here are some of its features and functions:

• Protection function:

• Magnetic balance differential protection: can effectively detect the internal fault of the motor, such as winding short circuit, etc., by comparing the difference of the current on both sides of the motor to determine whether there is a fault, with high sensitivity and reliability.

• Overcurrent protection: including fixed time overcurrent protection and inverse time overcurrent protection. Fixed time overcurrent protection operates after a fixed time delay when the current exceeds the set value; The inverse time overcurrent protection determines the action time according to the relationship between the current size and the fault duration. The larger the fault current, the shorter the action time, which can better adapt to different degrees of overload.

• Negative sequence protection: It can monitor and protect the negative sequence current generated by the motor due to the three-phase imbalance and other reasons to prevent the motor from being damaged due to excessive negative sequence current.

• Zero sequence protection: used to detect the motor grounding fault, when there is zero sequence current action in time to ensure the safety of personnel and equipment.

• Low voltage protection: When the power supply voltage drops to a certain extent, in order to avoid problems such as overheating caused by the motor running under low voltage, low voltage protection will cause the motor to trip and stop running.

• Measurement and monitoring function: It can measure various electrical parameters of the motor in real time, such as current, voltage, power, etc., and monitor and display these parameters, which is convenient for the operator to understand the operating status of the motor.

• Control function: It has the ability to control the motor to start, stop, accelerate, decelerate and other operations, and can achieve accurate control of the motor according to the needs of the system and the judgment of the protection device.

• Communication function: Usually with a communication interface, it can communicate with other devices or systems, achieve data transmission and remote monitoring, and facilitate unified management and monitoring of multiple devices in the centralized control room.

In practical applications, ABB REM543 can be widely used in various industrial fields, such as petrochemical, electric power, metallurgy, coal and other industries of high-voltage motor protection and control system, to ensure the safe and reliable operation of the motor, improve the stability and continuity of the power system plays an important role.

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ABB PLC System modules DCS system modules include some discontinued control system modules. (For example :PM645B, 5SHY3545L0014, 

PM630, 07AC91D, SPHSS13PP845PFEA111-20PFEA112-65 PPD113B01-10-150000, PPD115A102PPD113-B03-23-111615)

◆GE Gas Turbine clamp :IS200 series, DS200 series, etc. (e.g. IS200TRPGH1B, DS200PCCAG1A)◆Triconex: Redundant fault-tolerant control 

system, the most modern fault-tolerant controller based on triple module redundancy (TMR) structure. (e.g. 3721, 3625, 3008, 4351B, 3805E)

Foxboro (Foxboro) : 1 / ASeries system, FBM (field input/output module) sequence control, etc. (for example: FBM201CP270CP4BFCP280FCP270)

Bently Nevada(Bentley):3500 system cards. (e.g. 35/15350/2M5) HIMA(Dark Horse):F8650X, F8627X, F8651X, F8652X, F35, etc

Motorola(MOTOROLA):MVME162, MVME167, MVME1772, MVME177 and other series XOOl:1/0, Vne board and processor. 

(For example :XVME-653, XVME-674, XVME-976)

Rockvell (Allen-Bradley):1756, 1757, 1753, 1394 series. (Example :1756-L73XT1756-L611757-SRM)

◆Reliance: Discontinued spare parts (e.g. 0-60002-6, 5-D4022, S-D4006-D)

Westinghouse Emerson :VE3007CE3008, 5X00105G145X00119G01, 1X00416H011X00416H01

schneider :140 series processors, control cards, power modules, etc. (for example: 140 cpu67160c140cpu67260, 140 cpu65150140cpu43412140nwm110000

Medium description: ABB: Industrial robot DSQC series (series :DSQC202DSQC545A, DSQC627DSQC352DSQC679) Rexroth(Rexroth):

1/0 module PLC controller driver, etc. (e.g. TVD1.3-15-03, KDV3.1-100-220) Woodward: Control governor, etc. (e.g. 5464-414, 5466-409, 9907-164

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