Transformer protection relay ABB Oy Distribution Automation
RET615

RET615 is a dedicated transformer protection and control IED for power transformers, unit and step-up transformers including power generator-transformer blocks in utility and industry power distribution systems. RET615 is a member of ABB’s Relion® product family and part of its 615 protection and control product series. The 615 series IEDs are characterized by their compactness and withdrawable design. Re-engineered from the ground up, the 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability between substation automation devices.
RET615 is the ultimate protection and control IED for two-winding power transformers and power generator-transformer blocks. RET615 is available in four standard configurations to match the applied transformer neutral earthing principles with either high impedance or numerical low impedance restricted earth-fault protection schemes. CT ratio differences and phase shifts of all commonly employed power transformer vector groups are numerically compensated for. The standard RET615 configurations feature also local or remote control of the transformer HV side circuit breaker.

Due to the standard configurations of RET615 for the transformer protection, the IED can be rapidly set up and commissioned, once it has been given the application-specific settings.

RET615 genuinely supports the new IEC 61850 standard for inter-device communication in substations. It also supports the industry standard Modbus® protocol, and the well-established DNP3 and IEC 60870-5-103 protocols.

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