630A 12kV 50Hz Cable Junction Box Cable Branch Box Fixed Structure
Medium Voltage Products
Overview
XGW-12 box-type switching station (outdoor ring net box) is
equipped with ZBF series box-type gas-insulated metal-enclosed
switchgear. It is suitable for three-phase AC 50Hz, rated voltage
12kV power system, used for splitting and combining load current
and overload current, and used for electric energy distribution,
control and protection in the power system. As a ring network and
terminal power supply equipment, it is widely used in the
construction and transformation of urban and rural networks.
This box-type opening and closing has the characteristics of small
size, compact structure, convenient combination, beautiful
appearance, safe and reliable operation, convenient maintenance,
and small on-site installation workload.
The main technical parameters
| Serial number | First name | Single bit | Refer to the number |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-time power frequency withstand voltage (1min) (phase to
phase, phase to ground) | kV | 42 |
| 5 | Rated short-time power frequency withstand voltage (1min)
(isolation fracture) | kV | 48 |
| 6 | Rated short-time power frequency withstand voltage (1min)
(auxiliary and control circuit) | kV | 2 |
| 7 | Rated lightning impulse withstand voltage (peak value) (phase to
phase, phase to ground) | kV | 75 |
| 8 | Rated lightning impulse withstand voltage (peak value) (isolated
fracture) | kV | 85 |
| 9 | Rated short-time withstand current (main circuit) | kA/s | 20/4 |
| 10 | Rated short-time withstand current (ground loop) | kA/s | 17.4/2 |
| 11 | Rated peak withstand current (main circuit) | kA | 50 |
| 12 | Rated peak withstand current (ground loop) | kA | 43.5 |
| 13 | Main circuit resistance (two adjacent units) | μΩ | ≤300 |
| 14 | Protection level | | IP33 IK10 |
| 15 | Internal arc test | | Cable room 20 kA/0.5 s |
| Switch room 20 kA/0.5 s |
Use environment
lThe ambient air temperature does not exceed 40°C, and the average
value measured within 24 hours does not exceed 35°C.
The minimum ambient air temperature is -15°C.
Maximum wind speed: 35m/s.
The altitude does not exceed 1000m.
The surrounding air is not significantly polluted by dust, smoke,
corrosive and flammable gas, vapor or salt spray.
Humidity
Relative humidity: the daily average does not exceed 95%, and the
monthly average does not exceed 90%.
Water vapor pressure: the daily average value does not exceed
2.2kPa, and the monthly average value does not exceed 1.8kPa.
Vibration or ground movement from outside the switchgear and
control equipment can be ignored.
Compliance with standards
GB311.1-2012 Insulation coordination of high-voltage power
transmission and transformation equipment
GB1984-2003 High voltage AC circuit breaker
GB3804-2004 3.6kV~40.5kV high voltage AC load switch
GB3906-2006 3.6kV~40.5kV AC metal-enclosed switchgear and control
equipment
GB/T11022-2011 Common technical requirements for high-voltage
switchgear and control equipment
GB16926-2009 AC high voltage load switch-fuse combination
electrical appliance
GB1985-2004 High-voltage AC isolation switch and grounding switch
DL/T404-2000 3.6kV~40.5kV AC metal-enclosed switchgear and control
equipment
DL/T593-2006 Common technical requirements for high-voltage
switchgear and control equipment
