ABB RET670 is a digital protective relay for a wide range of applications in power system protection and control. Here are some of its main features and functions:

• Multiple protection functions: overcurrent protection, undervoltage protection, overvoltage protection, ground fault protection, etc. These protection functions can be configured and customized according to the needs of different electrical equipment and motors, such as differential protection for transformers, overcurrent protection, etc., to ensure the safe operation of transformers; It can also be used for the corresponding fault protection of generators, cables and lines in power systems.

• High precision measurement: advanced digital signal processing technology can be used to measure electrical parameters such as current and voltage with high precision. Through real-time monitoring and analysis of electrical parameter changes, accurately judge the running state of electrical equipment and motors, and timely issue protective actions.

• Fast response: It has a fast response speed, which can quickly cut off the fault circuit when the fault occurs, prevent the expansion of the fault and equipment damage, and help reduce the power failure time and the risk of equipment damage.

• Flexible configuration: Support flexible configuration and programming, function setting and parameter adjustment through software, users can customize personalized protection solutions according to actual needs and power system characteristics.

• Remote monitoring and control: Supports remote monitoring and control functions, allowing operators to remotely monitor power system status and perform necessary operations.

• Other features:

• With fast, low impedance differential protection function, low requirements on CT, differential protection function with 2 harmonic and waveform block suppression function, can avoid CT saturation and transformer surge current trip, and 5 harmonic suppression function, can avoid transformer overexcitation trip; Provides high sensitivity for low-level internal faults by using sensitive differential protection based on amplitude measurement and direction comparison of negative sequence components.

• A variety of low impedance limited ground fault protection functions are available as sensitive and fast primary protection against winding ground faults and include internal/external fault discriminators for increased safety; It also features high impedance differential protection for different applications such as limited ground fault protection for winding protection, autotransformer differential protection, shunt reactor protection, T-feeder protection, busbar protection and generator differential protection.

• Trip and alarm signals from pressure relief, Buholz and temperature devices can be sent directly to the RET670 via a binary input channel with highly stable anti-jamming capability.

• With distance protection function, it can be used as backup protection for faults inside the transformer and connected power system; Positive, negative and zero sequence overcurrent functions (optional direction and/or voltage control) provide further back-up protection; In addition, it also provides thermal overload, overexcitation, overvoltage/undervoltage and overfrequency/underfrequency protection functions; The circuit breaker fault protection function of each transformer circuit breaker allows the surrounding circuit breakers to trip at high speed.

• Built-in interference and event loggers that provide users with valuable data on status and operation for post-failure interference analysis; Complete control and interlocking functions are also available, including a synchronous check function to integrate master control or local standby control functions; With the function of pole slip protection, it can detect and evaluate the pole slip in the power system and take necessary measures.

• Can be used with the IEC61850-9-2LE process bus for up to six merging units (MU); Advanced logic functions can be programmed by graphical tools to achieve special applications, such as automatically opening the isolation switch in the multi-circuit breaker arrangement, closing the circuit breaker ring and load transfer logic, and real-time online monitoring and debugging logic for testing and debugging; Communication via a fiber optic connection ensures anti-interference capability.

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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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