SR745-W2-P1-G1-HI-A-L-R Transformer protection relay
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SR745-W2-P1-G1-HI-A-L-R is a transformer protection relay belonging to General Electric’s (GE) 745 Transformer Protection System series. Here are its detailed specifications:
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Powerful Protection Functions:
It can monitor and respond to physical and electronic variables of transformers such as temperature, harmonics, and overexcitation. It is equipped with overload protection, short-circuit protection, overcurrent protection, and other functions to prevent transformer overload or damage. Additionally, it can ensure the safe operation of the transformer system by cutting off power supplies, issuing alarms, and other measures.
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Integrated Management Capabilities:
Users can manage and protect the transformer system through set points. It supports remote monitoring and control, allowing operators to keep track of the transformer system status in real-time.
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Advanced Technology:
It adopts multi-processor technology and can provide management functions for two-winding or three-winding transformers. It features an adaptive harmonic restraint function to prevent false tripping during inrush currents; it can also automatically adjust the overcurrent element threshold setting based on the harmonic components of the load current.
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Control Power Supply:
Multiple ranges are available. The low range includes DC 25-60V, AC 20-48V (48-62Hz); the high range includes DC 90-300V, AC 70-265V (48-62Hz).
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Phase Current Input:
Source CT is 1-50000A primary / 1 or 5A secondary; relay input is 1A or 5A (specified at the time of order).
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Frequency:
Nominal 50 or 60Hz; frequency following range is 2-65Hz.
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Operating Temperature: -40°C to +60°C.
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Operating Environment Humidity: Up to 90% (non-condensing).
Widely used in power, energy, and industrial fields. It is suitable for large, medium, and small transformer systems, providing strong protection for the stable operation of transformer systems and meeting the protection needs of power systems of different scales.
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