Product Overview
6.6kV metal-enclosed switchgear is an indoor high-voltage integrated power distribution assembly, suitable for three-phase AC 50Hz, 6.6kV single busbar and single busbar sectionalized power systems. It is widely used in medium and high-voltage power distribution places such as power plants, substations, industrial and mining enterprises, high-rise buildings, data centers, petrochemical and metallurgical industries. It is mainly used for power reception, distribution, control, protection and monitoring, and can adapt to various working conditions such as high-voltage motor starting, reactive power compensation and distribution transformer control.
The product adopts a metal-clad withdrawable middle-mounted structure with high-quality core components, featuring complete five-prevention interlocking, safe isolation, strong interchangeability, convenient maintenance, reliable operation and outstanding short-circuit resistance. It complies with national and industrial standards including GB/T 3906, GB/T 11022, IEC 62271-200 and DL/T 404, has passed type tests and CCC certification, with stable performance to meet the strict operation requirements of 6.6kV medium and high-voltage power distribution systems.
Operating Environment
1. Ambient temperature: -15℃～+40℃, 24h average temperature ≤+35℃
2. Indoor installation, altitude ≤1000m (customizable to 2000m for special working conditions)
3. Relative humidity: daily average ≤95%, monthly average ≤90%, anti-condensation measures required
4. Seismic intensity: no more than 8 degrees
5. Installation inclination: inclination to vertical plane ≤5°
6. Installation site: free from fire and explosion hazards, serious pollution, chemical corrosion, severe vibration and impact, and away from strong electromagnetic interference
Technical Parameters
Item | Unit | Parameter |
Rated voltage | kV | 6.6 |
Rated insulation voltage | kV | 12 |
Rated frequency | Hz | 50 |
Rated current of main busbar | A | 630/1250/1600/2000/2500 |
Rated short-time withstand current (4s) | kA | 16/20/25/31.5/40 |
Rated peak withstand current | kA | 40/50/63/80/100 |
1min power-frequency withstand voltage | kV | Phase-to-phase/earth 42; Breaking port 48 |
Lightning impulse withstand voltage | kV | Phase-to-phase/earth 75; Breaking port 85 |
Protection class | — | Outer casing IP4X, compartment interior IP2X |
Overall dimensions (W×D×H) | mm | 800/1000×1500/1650×2200/2300 |
Executive standard | — | GB/T 3906, GB/T 11022, IEC 62271-200, DL/T 404 |
Product Features
1. Armored middle-mounted structure with high safety level: Full metal armored enclosed design, middle-mounted circuit breaker trolley, enabling quick withdrawal for maintenance. Each functional unit does not interfere with each other, effectively ensuring continuous and stable power supply of 6.6kV medium and high-voltage power distribution system and reducing power outage losses.
2. Complete five-prevention interlocking to eliminate misoperation: Strictly comply with five-prevention design specifications, with functions of preventing mis-closing/opening of circuit breakers, preventing trolley push-pull under load, preventing closing of earthing switch with electricity, preventing power transmission when earthing switch is closed, and preventing entry into live compartments. It fully protects personal and equipment safety and avoids operation risks.
3. Independent compartment design with strong fault controllability: The cabinet is divided into busbar room, circuit breaker room, cable room and instrument room. Each compartment is independently isolated and equipped with a special pressure relief channel, which can effectively suppress arc spread, quickly control fault scope and improve system operation reliability.
4.Strong interchangeability and convenient maintenance: Circuit breaker trolleys and isolating trolleys of the same specification are universally interchangeable, enabling door-closed operation and front maintenance. It supports wall-mounted installation and back-to-back installation, greatly simplifying construction process and reducing maintenance cost and workload.
5. Excellent dynamic and thermal stability, suitable for medium and high-voltage working conditions: Optimized busbar layout and cabinet structural strength, high-strength conductive materials, low temperature rise and strong short-circuit resistance. It can stably adapt to 6.6kV medium and high-voltage high-current operation for a long time and various complex power distribution scenarios.
6.Anti-corrosion, durable and long service life: The cabinet is made of high-quality aluminum-zinc coated plate or cold-rolled steel plate, processed by precision CNC machining, phosphating and electrostatic plastic spraying. It features high strength, oxidation resistance, corrosion resistance and aging resistance, suitable for various medium and high-voltage power distribution environments and extending service life.
Our Advantages
1. Quick quotation response, providing professional primary/secondary electrical design, system scheme optimization and technical consulting services to meet 6.6kV power distribution scenario requirements.
2. Standardized production line operation, short delivery cycle, support for urgent orders, customizable special specifications according to customer needs to adapt to different power distribution scenarios.
3. Full-process technical support: installation and commissioning, operation and maintenance training, after-sales maintenance, providing special operation and maintenance guidance for equipment to quickly solve operation and installation problems.
4. Complete series of certifications, including CCC, ISO, type test reports and other authoritative certifications, ensuring quality and complying with relevant national and industrial standards.
5. Strict quality management system, full-process control from raw material procurement, production and processing to finished product inspection, ensuring stable product performance to meet 6.6kV power distribution system operation requirements.
Ordering Guide
The following documents shall be provided for ordering:
1. Main circuit system diagram, secondary schematic diagram, wiring diagram and control logic requirements to clarify the adaptation requirements of 6.6kV power distribution scenarios.
2. Cabinet layout drawing, power distribution room plan and section layout drawing to facilitate optimization of installation scheme.
3. Inlet and outlet mode (cable/overhead), busbar connection requirements, cabinet installation spacing and fixing method.
4. Key parameters such as model, rated current and short-circuit breaking current of core components like circuit breakers and isolating switches to adapt to 6.6kV operation conditions.
5. Special environment (high altitude, anti-corrosion, explosion-proof, etc.) and special function requirements shall be explained and negotiated in advance to ensure product adaptation to the scenario.
