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ABB RET670 Transformer protection relay
ABB RET670 is a transformer protection relay, belonging to ABB's Relion® protection and control product family. It is specifically designed for comprehensive transformer protection and can protect transformers and other power system equipment from various faults and abnormal conditions. It can provide fast and customizable protection, monitoring and control functions for two - winding transformers, three - winding transformers, autotransformers and shunt reactors. The relay has advanced communication capabilities and can be integrated with substation automation systems or operate as an independent multi - functional device.
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ABB RET670 Transformer protection relay
Specific Parameters
- Rated voltage: Up to 245kV
- Rated frequency: 50/60Hz
- Rated current: Up to 5A
- CT inputs: Rated current 1A or 5A, dynamic range up to 100 times the rated current
- VT inputs: Rated voltage 100 – 220V, frequency range 35 – 70Hz
- Power supply:
- DC: Nominal range 48 – 250V DC, operative range 35 – 275V DC
- AC: Nominal range 100 – 240V AC, operative range 85 – 264V AC
- Binary inputs: Threshold voltage 24 – 250V DC
- Binary outputs: Contact ratings up to 250V AC/DC, 8A
- Communication interfaces: Ethernet 100Base – FX, 100Base – TX; Serial ports RS – 232, RS – 485; Supports communication protocols such as IEC 61850, Modbus, DNP 3.0, Profibus, IEC 60870 – 5 – 103
- Number of inputs: 32
- Number of outputs: 32
- Operating temperature: -25°C to +55°C
- Storage temperature: -40°C to +85°C
- Humidity: Up to 95% relative humidity
- Protection class: IP40 (front), IP20 (rear)
- Dimensions (width × height × depth): 483×267×252mm (19 – inch rack)
- Weight: 6000g
Product Performance
- Comprehensive protection functions:
- Differential protection: Can detect low – level internal faults and uses 2nd and 5th harmonic restraint to effectively deal with magnetizing inrush and overexcitation.
- Earth – fault protection: Has low – impedance and high – impedance protection functions to prevent winding earth faults.
- Distance protection: Serves as backup protection for phase – to – phase and phase – to – earth faults.
- Overcurrent and thermal protection: Configurable overcurrent and thermal overload protection with multiple time constants.
- Breaker failure protection: Can respond quickly when the breaker fails and trip the surrounding breakers.
- Precise and reliable: Through advanced algorithms and hardware design, it can accurately identify various faults and act quickly to ensure the safety of power equipment and reduce the scope and time of fault impact.
- Convenient communication: Supports multiple communication protocols, facilitating communication with other devices and systems. It can achieve remote monitoring, parameter setting and fault diagnosis, which is convenient for centralized management and maintenance of the power system.
- Strong environmental adaptability: Can work normally in the temperature range of -25°C to +55°C and in an environment with up to 95% relative humidity. With a protection class of IP40 (front) and IP20 (rear), it can adapt to a variety of industrial environments.
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