HR□ Series
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Category:
Keywords:
High-Voltage Switchgear
Box-type substation
- Product Description
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Scope of Application
The HR□ series isolating switch-fuse combination (hereinafter referred to as the "switch") is a patented product developed by our company (Patent No.: ZL 98 210340.9). It is primarily designed for use in power distribution and motor circuits, serving as a manually operated, non-frequent-use power switch, isolating switch, and providing overcurrent and short-circuit protection. Additionally, the switch features a clearly visible break point when disconnecting. This product has been widely adopted by various power bureaus, including those in Shanghai and Hangzhou, for installation in urban pole-mounted transformer control boxes—also known as "Lingke boxes." The switch meets the technical performance standards outlined in IEC 60947-3 and GB 14048.3.
Model and Meaning
Normal operating conditions
The ambient air temperature should not exceed +40°C or fall below -5°C, and the average temperature over 24 hours must remain below +35°C.
The workplace is located at an altitude of no more than 2,000 meters;
At an ambient air temperature of +40°C with relative humidity not exceeding 50%, the monthly average maximum relative humidity in the wettest month reaches 90%, while the average minimum temperature for that same month is +25°C.
The pollution level of the surrounding environment is classified as Level 3.
Main technical specifications
Specification HR□ 630 1000 Main series 3 Rated Operating Voltage (V) AC 380 Rated Operating Current (A) 630 1000 Rated making and breaking capacity (A) 945 1500 Rated Short-Circuit Current (kA) 50 Maximum Circuit Breaker Current (A) 630 1000 Structural Features
The HR□ series switches feature a uniquely designed contact system that uses the linkage mechanism of the operating handle to drive the blades in a precise, reciprocating linear motion. This ensures synchronized opening and closing of the blades with the upper and lower contacts, enhancing safety while also making it easy to replace fuses. The switch employs a dual-break contact design combined with a double-head arc-extinguishing grid, effectively reducing arc intensity and minimizing arc-extinguishing time during switching operations. Additionally, auxiliary contacts are strategically placed at the ends of the upper and lower contacts to prevent welding, thereby eliminating the risk of localized fusion even when the switch is operated under load. As an optional feature, these switches can be equipped with grid-type fuses whose characteristic curves precisely match those of transformers, making them ideal for use in outgoing-line control boxes (cabinets).
External Dimensions and Mounting Size
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