Summary
HXGN15-12L HV switchgear metal enclosed AC ring main unit is a new HV apparatus which introduced from abroad and accord with the requirement of rural distribution and city distribution in nation. Main switch, operation mechanism and component use the SFL-12 model SF6 switch equipment produced by ABB company or FLN36-12D model SF6 switch equipment produced by our company. Also can use the HAD/US model SF6 circuit breaker or VD4-S model vacuum circuit breaker produced by company ABB according to requirement of customer operation type is manual and motor.
Ambient condition
- Ambient temperature: -25℃ ~+40℃；
- Altitude: ≦1000m；
- Relative humidity: daily average ≤ 95%, monthly average ≤ 90%;
- Occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration, without strong shake.
Model
Product feature
Panel structure: The panel body is enclosed by 2 mm aluminium-zinc plated steel plate after multi-bending. It is simple, firm, delicate and peculiar.
1. Busbar compartment
The busbar compartment is located in the top and connect with neighboring panel.
2. Load break switch is a separated unit with SF6 gas.
3. Cable compartment
Approximate 75% room for connecting cable and installing fuse, earthing switch and PT.
4. Mechanism chamber and interlock
The chamber consists of operating mechanism, mechanism interlock, position indicator, auxiliary contact trip coil, power indicator and interlock.
5. LV chamber
LV compartment is located in the top. It mainly user for installing instrument, relay and motor.
6. Circuit breaker compartment
The circuit breaker (SF6 or Vacuum) is located below load break switch.
Pressure release:
A. Upper pressure release
It is mainly used for releasing gas pressure which produced by arc accident in busbar load break switch compartment.
B. Down pressure release
It is mainly used for releasing gas pressure which produced by arc accident in cable small compartment.
Technical specification
| Item | Unit | Parameter |
| Rated voltage | kV | 10 |
| Highest working voltage | kV | 12 |
| Rated frequency | Hz | 50/60 |
| Main busbar rated current | A | 630 |
| Main loop, earthing loop rated short time withstand current | kA/s | 20/3 |
| Main loop, earthing loop rated peak withstand current | kA | 50 |
| Main loop, earthing loop rated short circuit making current | kA | 50 |
| Load break switch full capacity breaking time | Times | 100 |
| Fuse breaking current | 31.5-50 | |
| Mechanical life | Times | 2000 |
| Rated transfer current | A | 1700 |
| 1min P.F. Withstand(virtral value),phase to phase, earth/across open contacts | kV | 42/48 |
| Lightning impulse withstand voltage(peak) phase to phase, earth/across open contacts | kV | 75/85 |
| Secondary loop 1min P.F. Withstand | kV | 2 |
| Protection degree | IP3X |
Outline and dimension
XGN(W)74-12 series consisting of bottom compartment, gas compartment, operating mechanism, interlock mechanism and LV control compartment. Each compartment disconnected by copper plate. Gas compartment have pressure release device. Lower compartment have pressure release guide in order to avoid accident. Degree of protection is IP3X.
| Width of circuit breaker panel | mm | 750 |
| Other width of panel | mm | 375/500 |
| Height | mm | 1600/1850 |
| Depth | mm | 980 |
| Height of LV case | mm | 450 |
