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China Suppliers Factory XGTD7-(12/240.5 Indoor Gas Insulated Metal-clad Switchgear for Reliable Power Solutions
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 (FAQ)
Q
What are the key design features of this switchgear?
The product is characterized by its flexible combinations, high safety levels, complete interlocking logic, extensibility, miniaturization, and maintenance-free design.
Q
What is the maximum operating altitude for this equipment?
The equipment can operate at altitudes up to 5000m above sea level. Note that if the installation altitude exceeds 1000m, it must be specified during ordering so that the manufacturing inflation pressure can be adjusted accordingly.
Q
What are the degree of protection (IP) ratings for the compartments?
The high-voltage (HV) gas compartment is rated at IP67, while the low-voltage (LV) compartment is rated at IP4X.
Q
What are the allowable ambient temperature limits for installation?
The standard ambient operating temperature range is -25℃ to +40℃, with the daily average value not exceeding 35℃.
Q
What is the annual insulation gas loss rate for the system?
The system is highly sealed, ensuring that the annual loss rate of the insulation gas remains less than or equal to 5‰.