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China XGTD7 (12/240.5 Indoor Gas Insulated Metal-clad Switchgear - Suppliers & Factory Direct
General
The product has features of flexible combinations, great safety, complete interlocking logic as well as extensibility, miniaturization and free for maintenance. So that it was commonly used in infrastructure construction for power station, power substation, movable transformer pack, buildings that have the 35kV or below nominal voltage. Especially for some sever environment like high altitude, heavy pollution and high humidity.
Service conditions
a. Ambient temperature: -25℃~+40℃, the daily average value shall not exceed 35 ℃
b. Altitude: Not more than 5000m above the sea level (If the equipment is running above 1000m, please specify it specifically for the convenience of adjusting the inflation pressure during manufacturing)
c. Relative humidity: Daily average is not more than 95%, Monthly average is not more than 90％
d. Seismic grade: the seismic intensity shall not exceed grade 8
e. The electromagnetic interference amplitude induced by the secondary system: not more than 1.6KV
Note: if the service environment exceeds the above conditions, please consult with the manufacturer.
Technical parameter
Main technical parameters of switchgear
| Item | Unit |
Parameters |
|||
| Rated voltage | kV |
12 |
24 |
40.5 |
|
| Rated current | A |
630/1250/1600/2000/2500 |
|||
| Rated frequency | Hz |
50/60 |
|||
| 1 min rated power frequency withstand voltage (RMS) | Phase to Phase/Phase to earth | kV |
42 |
65 |
95 |
Isolating fracture |
48 |
79 |
118 |
||
| Rated Lightning impulse withstand voltage (peak) | Phase to Phase/Phase to earth | kV |
75 |
125 |
185 |
Isolating fracture |
85 |
145 |
215 |
||
| Rated power frequency withstand voltage of auxiliary circuit | kV |
2 |
|||
| Rated short-circuit breaking current (r.m.s) | kA |
20/25/31.5 |
|||
| Rated short-circuit making current (peak) | kA |
50/63/80 |
|||
| Rated short-time withstand current (4s) | kA |
20/25/31.5 |
|||
| Rated peak withstand current | kA |
50/63/80 |
|||
| Main circuit resistance of each phase | μΩ |
Rated current≤1600A, Rc≤200 Rated current≥2000A，Rc≤105 |
|||
| Rated voltage of auxiliary and control circuit | V |
DC110/220 AC220 |
|||
| Rated working pressure of insulation gas(20℃) | MPa |
0.05 |
|||
| Min working pressure of insulation gas(20℃) | MPa |
0.03 |
|||
| Annual loss rate of insulation gas | ‰ |
≤5 |
|||
| Degree of Protection | / |
HV gas compartment IP67 LV compartment IP4X |
|||
| Weight | Kg |
1000~1600 |
|||
Typical scheme
A - Cable room B- Main switch room C - Instrument room D - Mechanism room
Figure 1 Typical structure and outline dimension diagram of XGTD7-40.5/1250 Circuit Breaker Cabinet (Bus top expansion)
A - Cable room B- Main switch room C - Instrument room D - Mechanism room
Figure 2 Typical structure and outline dimension diagram of XGTD7-40.5/1250 Circuit Breaker Cabinet (Bus side expansion)
Frequently Asked Questions
What are the main applications of this switchgear?
This product is commonly used in infrastructure construction for power stations, power substations, movable transformer packs, and buildings with a nominal voltage of 35kV or below. It is highly suitable for severe environments such as high altitudes, heavy pollution, and high humidity.
What is the maximum altitude limit for standard installation?
The standard service condition allows for altitudes up to 5000m above sea level. However, if the equipment is intended to run above 1000m, please specify this during ordering so the manufacturer can adjust the inflation pressure during manufacturing.
What are the ambient temperature and humidity requirements?
The ambient temperature must be between -25℃ and +40℃, with a daily average not exceeding 35℃. The daily average relative humidity should not exceed 95%, and the monthly average should not exceed 90%.
What are the protection ratings (IP grade) of the compartments?
The switchgear features a high degree of protection, with the High-Voltage (HV) gas compartment rated at IP67 and the Low-Voltage (LV) compartment rated at IP4X.
What is the annual gas leakage rate of the insulation gas?
The annual loss rate of the insulation gas is highly controlled and is specified to be less than or equal to 5‰, ensuring long-term maintenance-free operation.
What should be done if the local environment exceeds the standard service conditions?
If your installation environment exceeds the specified limits for temperature, altitude, humidity, seismic activity, or electromagnetic interference, please consult directly with the manufacturer for custom adjustments.