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ABB REX521GHHGSH51G Relay protection device
ABB REX521GHHGSH51G is an intelligent protection device suitable for medium - voltage power grids. It can provide basic protection for busbars and feeders in utility substations and industrial power distribution systems. The device can also be used for the protection of large and medium - sized three - phase AC motors in circuit breaker - controlled motor drives. Typical applications include incoming and outgoing feeders, motor feeders, and substation protection. In addition, it can be used as a backup protection for power transformers and a backup protection for high - voltage line protection relays. Its protection relay is equipped with energized inputs for traditional current and voltage transformers, and there is also a hardware version with current and voltage sensor inputs.
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ABB REX521GHHGSH51G Relay protection device
Specific Parameters
- Electrical parameter protection range: Current protection range is 100 – 400A; Voltage protection threshold is configurable
- Operating voltage: 220V
- Output frequency: 30HZ
- Processing speed: 15HZ
- Program capacity: 3MB
- Data capacity: 2MB
- Weight: 1.1KG
- Supported communication protocols: Modbus RTU/TCP, IEC61850, etc.
- Operating temperature range: -30°C to +70°C
- Humidity range: Up to 95%
- Human – machine interface: Equipped with an LCD display, navigation buttons are set, providing multi – view display (such as real – time data, event records, setting interface); Setting values are password – protected, and multi – language interfaces are supported
Product Performance
- Comprehensive protection functions: Integrates over – current, over – voltage, under – voltage, leakage protection and other functions to effectively ensure the safety of equipment and systems.
- Strong fault diagnosis ability: Has the function of indicating fault types and locations. Fault codes are presented in real – time through the HMI interface, which can shorten the maintenance response time.
- Thermal overload protection: Built – in thermal model algorithm, monitors the thermal state of the motor by combining current and temperature data to prevent insulation damage caused by overload.
- Good communication expandability: Supports multiple communication protocols, can be seamlessly connected to DCS or SCADA systems to achieve remote monitoring and parameter setting; Compatible with traditional current/voltage transformers and electronic sensors, supports multi – channel data acquisition to improve measurement accuracy; Equipped with an optically isolated serial communication port, supports cascading expansion, and is suitable for complex power grid topologies.
- Convenient display and operation: The human – machine interface includes buttons for operation, and operations such as language selection, adjustment of display backlight, adjustment of display contrast, and display test can be carried out.
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