SF₆ Gas-Insulated Ring Main Unit
HXGNQ-40.5
Fully sealed SF₆ gas insulation for high stability and maintenance-free operation, flexibly adapting to 35kV grids to guarantee safe, reliable power supply.
Product Description
A ring main unit (RMU) is an electrical equipment that installs a set of high-voltage switchgear inside a steel plate metal enclosure and assembles them into compartmentalized ring power supply units, with secondary monitoring or protection equipment installed according to user needs. It is mainly used for ring-type power supply, as well as fault isolation and recovery in power supply. Its characteristics are simple structure, small volume, low price, and the ability to improve power supply parameters, performance, and safety. The HXGNS series ring main unit is an SF₆ gas-insulated metal-enclosed ring main unit suitable for secondary distribution networks with a rated voltage of 17.5kV and a frequency of 50/60Hz. HXGNS can be applied to most switching applications in 17.5kV distribution networks.
Product Advantages
SF₆ Gas-Insulated Ring Main Unit
Product Parameter Table
| Technical Parameters | Unit | V-Module | C-Module | F-Module |
| Rated Voltage | kV | 40.5 | 40.5 | 40.5 |
| Power Frequency Withstand Voltage | kV | 95 | 95 | 95 |
| Power Frequency Vacuum Break | kV | 95 | / | / |
| Power Frequency Isolation Break | kV | 118 | 118 | 118 |
| Lightning Impulse Withstand Voltage | kV | 185 | 185 | 185 |
| Lightning Impulse Vacuum Break | kV | 185 | / | / |
| Lightning Impulse Isolation Break | kV | 215 | 215 | 215 |
| Rated Current | A | 630 | 630 | HV Fuse Max 100 |
| Breaking Capacity | kA | 20,E2 | ||
| Making Capacity | kA | |||
| Transfer Current | A | 50 | 50(5 times) | 750 |
| Electrical Endurance | E2 | E3 | ||
| 3s Short-Time Withstand Current | kA | 20 | 20 | |
| Internal Arc | S | 1 | 1 | 1 |