RET670 1MRK004816-AB Transformer protection RET 670

RET670 provides fast and selective protection, monitoring andcontrol for two- and three-winding transformers,autotransformers,step-up transformers and generator-transformer block units, phase shifting transformers, specialrailway transformers and shunt reactors. The lED is designed tooperate correctly over a wide frequency range in order toaccommodate power system frequency variations duringdisturbances and generator start-up and shut-down.
RET670 has a fast, low-impedance differential protectionfunction with very low requirements on the CTs.lt is suitable fordifferential applications with multi-breaker arrangements withup to six restraint CTinputs. The differential protection functionis provided with a 2nd harmonic and waveform-block restraintfeature to avoid tripping for CT saturation and transformerinrush current, and 5th harmonic restraint to avoid tripping fotransformer overexcitation.
The differential function offers a high sensitivity for low-levelinternal faults by using a sensitive differential protection featurebased on an amplitude measurement and directionacomparison of the negative sequence components.

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Description

Overview

Essential details：RET670 1MRK004816-AB Transformer protection RET 670

Product Description

RET670 provides fast and selective protection, monitoring andcontrol for two- and three-winding transformers,autotransformers,step-up transformers and generator-transformer block units, phase shifting transformers, specialrailway transformers and shunt reactors. The lED is designed tooperate correctly over a wide frequency range in order toaccommodate power system frequency variations duringdisturbances and generator start-up and shut-down.
RET670 has a fast, low-impedance differential protectionfunction with very low requirements on the CTs.lt is suitable fordifferential applications with multi-breaker arrangements withup to six restraint CTinputs. The differential protection functionis provided with a 2nd harmonic and waveform-block restraintfeature to avoid tripping for CT saturation and transformerinrush current, and 5th harmonic restraint to avoid tripping fotransformer overexcitation.
The differential function offers a high sensitivity for low-levelinternal faults by using a sensitive differential protection featurebased on an amplitude measurement and directionacomparison of the negative sequence components.
Multiple low impedance restricted earth-fault protectionfunctions are available as a sensitive and fast main protectionagainst winding earth faults. This function includes a internal/external fault discriminator for additional security.
Additionally, a high impedance differential protection function isavailable.lt can be used for different applications includingrestricted earth fault protection as winding protectionautotransformer differential protection, shunt reactorprotection,T-feeder protection, busbar protection andgenerator differential protection.
Tripping and alarm signals from pressure relief, Buchholz andtemperature devices can be sent directly to RET670 via binaryinput channels for alarm and back-up purposes. The binaryinputs are highly stabilized against disturbances to preventincorrect operation due to, for example, DC system capacitivedischarges or DC earth faults.

RET670 1MRK004816-AC

Product parameter

Model: 1MRK002816-AC (RET670)
Type: protective relay module
Rated voltage: 110v ~ 220v AC
Rated frequency: 50hz to 60hz
Operating temperature: -25℃~ +70℃
Overall dimensions: 200mm × 150mm × 80mm
Weight: 1.5kg
Communication protocol: May support IEC 61850, Modbus, DNP3 and other standard protocols

APPLICATION

The RET670 is a control relay product commonly used for the protection, monitoring and control of power systems. Here are some details about the RET670 products:
Application field:
The RET670 is primarily used in power systems to provide protection and control functions for various devices in power systems, such as generators, transformers, cables and lines.
Functional features:
Power system protection: RET670 can detect a variety of faults in the power system, such as overcurrent, overload, short circuit, etc., and provide corresponding protection measures to prevent equipment damage or system crash.
System Monitoring and data acquisition: The product provides monitoring and data acquisition functions for the power system, which can be used to diagnose, record and analyze the operating status of the power system.
Differential protection: The RET670 may include differential protection to detect current differences in the system in order to identify and isolate faults in a timely manner.
Remote monitoring and control: Support for remote monitoring and control functions, allowing operators to remotely monitor the status of the power system and perform necessary operations.
Event recording and alarm: With event recording function, it is used to record the events and faults that occur in the system for subsequent analysis and troubleshooting.
Communication system: The RET670 has a communication interface to communicate with the monitoring system, SCADA system or other automation equipment to achieve remote monitoring and control of the power system.

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Superiority products RET670 1MRK004816-AB Transformer protection RET 670

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