Non-shielded Upper Isolation
Product Overview
Environmental Protection: The solid-insulated ring main unit eliminates sulfur hexafluoride gas and associated gas-separation components, employing insulated-cylinder-encapsulated switchgear and closed busbars to connect individual circuits, thereby achieving complete enclosure and full insulation throughout the entire assembly.
Safety: The solid-insulated ring main unit integrates vacuum arc extinction, the main conductive circuit, and insulating supports into a single, fully integrated assembly, achieving complete insulation, full sealing, and maintenance-free protection. It provides complete phase-to-phase isolation and features anti-misoperation functionality.
Intelligent: The modular operating mechanism can be configured according to grid voltage requirements, enabling flexible on-site switching between manual and electric operation. When the load switch is opened, it fully meets the requirement for instantaneous automatic reclosing.
Flexibility: Solid-insulated ring main units achieve compact modular design and flexible configuration while meeting the IP67 pollution-proof rating, eliminating the need for sealing and thereby significantly reducing operating costs. They also offer distinct technical advantages in intelligent upgrades, internal monitoring, and resilience to harsh environmental conditions, including extreme cold, high-altitude environments, humid salt spray, strong winds and sandstorms, and underground installations.
Terms of Use
● Ambient temperature: -45°C to +40°C
● Humidity: maximum daily average of 95%, maximum monthly average of 90%
● Altitude: not exceeding 1,000 meters
● Maximum daily average temperature: +35℃
● Maximum daily relative humidity: 95%
● Install in locations free from fire hazards, explosion risks, and severe vibration.
Implementation Standard
GB311.1-2012
GB/T 4109-2022
GB/T 3906-2020
GB7354-2003
GB/T 5582-1993
GB/T 5169.16-2008
GB/T 11022-2020
Technical Specifications
Category | Model | Rated Voltage kV | Rated current A | 4s rated short-time withstand current, kA | Rated peak withstand current, kA | 1 min power-frequency withstand voltage, kV | Rated Lightning Impulse Withstand Voltage (kV) | 1.2 Partial discharge value ≤ | ||||
Phase-to-phase and phase-to-ground | Isolation fracture | Phase-to-phase and phase-to-ground | Isolation fracture | Unshielded | Shielding (630A only) | |||||||
Lower isolation | FEP3 | 12 | 630/1250 | 25/31.5 | 63/80 | 42 | 48 | 75 | 85 | 3 | 20 | |
Enter isolation | FEP6 | 12 | 630/1250 | 25/31.5 | 63/80 | 42 | 48 | 75 | 85 | 3 | 20 | |
Outline Dimension Drawing (mm)
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Contact Us
0411-83167110
No. 95, West Section of Shiji Road, Pulandian District, Dalian City, Liaoning Province
Leave a message to get a product quote.
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