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China XGTD7- (12/240.5 Indoor Gas Insulated Switchgear Suppliers | High-Quality Factory Products
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 severe environments 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. Electromagnetic interference: 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 |
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| 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 (FAQ)
What are the main application environments for this switchgear?
This switchgear is widely used in infrastructure construction for power stations, power substations, movable transformer packs, and buildings with a nominal voltage of 35kV or below. It is particularly designed for severe environments featuring high altitude, heavy pollution, and high humidity.
Can this equipment be installed at high altitudes?
Yes, it supports service altitudes up to 5000m above sea level. Note that if the installation altitude exceeds 1000m, you must specify it during ordering so that the insulation gas inflation pressure can be properly adjusted during manufacturing.
What are the standard ambient temperature limits for operation?
The standard ambient operating temperature ranges from -25℃ to +40℃, and the daily average temperature must not exceed 35℃.
What is the degree of protection (IP code) of the compartments?
The high-voltage (HV) gas compartment is rated at IP67, providing complete protection against dust and temporary water immersion. The low-voltage (LV) compartment is rated at IP4X.
What should be done if the local environment exceeds the specified limits?
If your specific service environment exceeds the standard limits (such as seismic intensity above grade 8, extreme temperatures, or higher altitudes), please consult directly with the manufacturer to customize the equipment parameters.