Air isolated circuit breakers with disconnector which is used in eco-friendly switchgear and air insulated switgear (AIS), utilize a semi-encapsulated structure and adopts vacuum arc extinguishing method, offering advantages such as uniform electric field, reliable interruption, long service life, maintenance-free operation, and easy installation. The material recovery and degradation rate reaches over 95%.It conforms to the need of sustainable development strategy.
In medium-voltage power distribution systems, the most commonly used ring main units (RMUs) include SF6 gas-insulated RMUs, solid-insulated RMUs, and environmentally friendly gas-insulated RMUs. However, due to the greenhouse effect of SF6 gas and the difficulty in recycling solid insulation materials, the application of SF6 gas-insulated RMUs and solid-insulated RMUs will be limited. This circuit breaker contains no sulfur hexafluoride (SF6) greenhouse gas or solid epoxy resin waste, achieving remarkable energy conservation and emission reduction effects. The installation volume is small, the structure is safe and reliable, and there are multiple schemes such as upper isolation and lower isolation.
The GRHV-12/630 is primarily used as the top-mounted isolation unit in environmentally friendly air-insulated ring main unit cabinets. As the primary component within the cabinet, it performs the main circuit closing and opening functions, closing and opening rated load currents, and closing and interrupting short-circuit currents.
Operating Procedures
Power Outage Grounding Operation:
The product's initial state is: the circuit breaker is in the closed position, the disconnector is in the closed position, and the grounding switch is in the open position. Operation Steps: First, operate the circuit breaker to the open position Then confirming that the circuit breaker is in the open position, operate the disconnector to the open position After confirming that the circuit is de-energized through a voltage test, operate the grounding switch to the closed position Close the circuit breaker to achieve line-side grounding Open the cable compartment door.
Power Restoration Operation:
The product's initial state is: the circuit breaker is in the closed position, the disconnector is in the open position, and the grounding switch is in the closed position. Operation Steps: Close the cable compartment door First, operate the circuit breaker to the open position Operate the grounding switch to the open position After confirming that it is in the open position, operate the disconnector to the closed position Confirm that the disconnector is in the closed position Close the circuit breaker.
Standard
GB/T11022 "Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards"
GB/T3906 "3.6-40.5kV AC Metal-Enclosed Switchgear and Controlgear"
GB/T3804 "High-Voltage AC Load Switches"
GB/T1985 "High-Voltage AC Disconnectors and Earthing Switches"
GB/T1984 "High-Voltage AC Circuit Breakers"
GB/T4208 "Degrees of Protection Provided by Enclosures (IP Code)"
Usage Environment
- The altitude of the application site cannot exceed 2,000 meters, and the seismic intensity must not exceed 8 degrees.
- The product should be operated in an ambient humidity range of -30°C to +40°C, with a daily average relative humidity not exceeding 90% and a monthly average relative humidity not exceeding 90%.
- The installation location needs to be free from frequent and severe vibration, as well as the presence of water vapor, gases, and chemically corrosive deposits that could seriously affect the performance of the mechanism.
- The installation location should be free from smoke, dust, dirt, fire, and explosion hazards.
- If any deviation from normal usage conditions occurs, the customer should consult the manufacturer in advance so that we can adjust the product during production.
Product Parameters
| No. | Item | Unit | Data |
| 1 | Rated voltage | KV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-time withstand current | kA | 20/25 |
| 5 | Rated peak withstand current | kA | 50 |
| 6 | Rated short-circuit duration | s | 4 |
| 7 | Rated short-circuit closing current | kA | 50 |
| 8 | Operating times | times | 10000 |
| 9 |
Resistance of the main circuit
|
μΩ | ≤80 |
| 10 | 1min power frequency withstand voltage | KV | 42/48 |
Dimension
Supporting Operating Mechanism
Operating Mechanism Of Circuit Breaker- GRVD
This series of circuit breaker operating mechanisms are suitable for use in medium voltage ring network cabinets and are used in conjunction with this circuit breaker to realize operations such as opening and closing, opening, and grounding. This set also has a reclosing function and an interlocking function when used in conjunction with the isolation mechanism.
Our Clients
Our Advantage
10 years+ manufacture experience
Complete production technology and management
Greater flexibility to produce tailored or specialized products
Integrated supply chain
Strong after-sales service & support
Packing
Carton
Wooden Case
Pallet
FAQ
Q: Are you a trader or manufacturer ?
A: We are a manufacturer, welcome your visit to our factories.
Q: How can I get the sample?
A: Ship by air or express or sea according to your demands.
Q: How long does it usually produce?
A: Samples within 3 days, if purchase in bulk rely on the quantity.
Q: How can I trust you ?
A: We don't want one-off business, but a long-term cooperation with you, my dear friend.
Q: Which station is this circuit breaker for?
A: Three positions. We also offer two positions if you need.
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