ABB REX521GHHPSH06G

Description

1. Product Description

2. Product Parameters

• Voltage: The rated primary voltage of the voltage transformer can be set from 0 to 440 kV, and the rated voltage of the voltage input is the same as the secondary rated voltage of the connected primary voltage transformer, which can be 100 V, 110 V, 115 V, or 120 V5.
• Current: The rated primary current of the current transformer is in the range of 0 – 6000 A5.
• Interface Type: It has optical communication ports, isolated RS – 485 connections, and front – panel optical connections for PCs2.
• Compatibility: Compatible with conventional current and voltage transformers, as well as current and voltage sensors developed by ABB3.

3. Advantages and Characteristics

• High Reliability: The relay is designed with advanced protection functions and has undergone strict testing and verification, which can operate stably in harsh environments, ensuring the reliability of power system protection. For example, in some power distribution systems, it has successfully withstood the test of long – term operation and effectively protected the safety of the power grid.
• Easy Integration: With pre – made standard configurations and various interface types, it can be easily integrated into different power distribution systems and is convenient for users to install, configure, and use. It can quickly adapt to the needs of different projects, reducing the difficulty and cost of system integration.

4. Application Areas and Application Cases

• Application Areas: Widely used in the power distribution systems of utilities and industrial substations, such as the protection of incoming and outgoing feeders, motor feeders, and substation protection. It can also be used as backup protection for power transformers and high – voltage line – protection relays3.
• Application Case: In a certain industrial park, the power distribution system uses the ABB REX521GHHPSH06G to protect the incoming and outgoing feeders. Through its precise protection functions, it can quickly detect and isolate faults, effectively ensuring the normal operation of the power supply in the park and reducing the impact of power outages on production.

5. Comparison with Competitors

6. Selection Suggestions

• Compatibility: Consider the types of current and voltage transformers or sensors used in the existing system to ensure the compatibility of the ABB REX521GHHPSH06G.
• Installation Environment: Pay attention to the environmental conditions such as temperature, humidity, and the presence of chemically active gases or dust around the installation location. If the conditions are harsh, appropriate protective measures should be taken2.
• Budget: Although the price of the ABB REX521GHHPSH06G is relatively high, considering its comprehensive functions, high reliability, and long – term operation stability, it has a high cost – performance ratio in the long run.

7. Precautions

• Safety Specifications: Dangerous voltages may exist on the connectors even when the auxiliary voltage is disconnected. Therefore, national and local electrical safety regulations must be followed, and only qualified electricians are allowed to install and maintain the relay2.
• Maintenance Suggestions: Regularly check the operating status of the relay and visually inspect it during secondary testing. If the environmental conditions are poor, increase the frequency of inspection2.