Audited Supplier
Switchgear is a combination of electrical disconnect switches, circuit breakers, fuses, and other protective devices that are used to control, protect, and isolate electrical equipment in a power system. These devices are typically installed together in a metal enclosure or cabinet, forming a switchgear assembly. It ensures the safety of an electrical system by facilitating the safe operation, maintenance, and protection of the electrical network. It enables operators to de-energize specific parts of the system for maintenance or repair work, as well as to clear faults by automatically interrupting the flow of electricity when abnormal conditions like short circuits or overloads occur.
Qinghao Electric is developing and producing a variety series switchgear, which can be classified into different types based on various factors such as voltage level (LV--below 1000V, MV--up to 35kV, HV--above 35kV), installation location (indoor or outdoor), and the type of technology used (like air-insulated, gas-insulated, or oil-insulated). Main types include: KYN, XGN, HXGN, XGW, DFW, GGD, GCK, GBD, PGL MNS and so on.
Reliable, rapid deployment, cost-effective, safe and easy operation.
Main Characteristics
1. Voltage and Current Ratings: Switchgear is handling specific voltage and current levels based on the electrical system they are installed in.
2. Interrupting Capacity: This refers to the ability of a circuit breaker or switch to safely interrupt the flow of fault currents.
3. Isolation Capability: Switchgear allows for safe isolation of electrical circuits for maintenance or repair work.
4. Protection Features: Built-in protection mechanisms like overcurrent, undervoltage, and earth fault protection relays to automatically disconnect faulty parts of the system.
5. Arc Interruption: In the event of a fault, switchgear is able to safely extinguish the electric arc that forms when breaking a circuit under load.
6. Control and Monitoring: Advanced switchgear may have integrated control and monitoring systems.
Advantages
1. Protection of equipment.
2. Reliable and safe.
3. Easy to operate and free maintenance.
Applications
1. Power generation plants.
2. Electricity transmission and distribution networks.
3. Industrial facilities: factories, mines, and large commercial buildings.
4. Renewable energy systems: solar farms, wind turbines, and other renewable energy installations.
5. Transportation infrastructure: railways, airports, and seaports.
Service Environment
1. Ambient temperature: Maximum +40ºC, Minimum -25ºC
2. Altitude: less than 1000 meters.
3. Seismic level: less than 3m/s2 at horizontal direction and less than 1.5m/s2 at vertical direction.
4. Installation environment: No obvious and heavy pollution, no explosive and corrosive gas and dust, with good air ventilation and no severe vibration and shock.
(Note: If the application environment is different from the above standard conditions, please contact for customized designs.)
Please check below quick links for other product types.
| Control Transformer | Oil Immersed Transformer | Dry Type Transformer |
| Substation Transformer | Switchgear | Distribution Cabinet |
The rated voltage can be customized as customers' requirements. For instant communication, please click here.
No | Item | Unit | LV Parameter | MV Parameter |
| 1 | Rated voltage | kV | 7.2kV, 12kV, 17.5kV, 24kV | 36kV, 40.5kV |
| 2 | Rated frequency | Hz | 50/60 | 50/60 |
| 3 | Rated current | A | 630, 1250, 1600, 2000, 2500, 3150, 4000 | 630, 1250, 1600, 2000, 2500, 3150, 4000 |
| 4 | 1 min power frequency withstand voltage(wet/dry) | kV | 38/48, 50/60, 60/65 | 70/95 |
| 5 | Lightning impulse withstand voltage | kV | 75/95/125 | 170/185 |
| 6 | Rated short circuit breaking current(peak) | kA | 40/50/63/80/100 | 20/25/31.5/40 |
| 7 | Short time withstand current(4s) | kA | 20/25/31.5/40 | 40/50/63/100 |
| 8 | Protection type | IP4X for housing | IP4X for housing |
Except for ISO9001, ISO14001, ISO45001 certificates, we are also TUV audited suppliers with AAA enterprise and AAA products honors. All products comply with GB and IEC related standards, which mainly include oil immersed distribution transformer, dry-type transformer, amorphous alloy transformers, combined transformer substations, circuit breaker, cable branch box, high low voltage switchgear cabinet distribution equipment.
With the concept of "World-class transformers, smart solutions", Qinghao Transformer is devoting to provide high-quality power for customers.
Let us cooperate with a brighter future!
A: We are the original factory with approved export license.
Q: What's your warranty terms?
A: We offer 24 months warranty time.
Q: How long is the production time?
A: 25 to 45 days or depending on order requirements.
Q: What should provide to make custom transformer?
A: Technical drawing and specification documents are the best, or you can list key parameters for designing.
Q: How can I trust you?
A: We are TUV aduited supplier with many patent certificates, type test reports, CQC, CE, KEMA, ISO certificates. We can provide on site services for many areas like South America, Indonesia, etc.
 |  |
