72.5KV Outdoor high-voltage SF6 open type combination electrical appliances

Installation Site

Workshop

Product show

package

Product Definition:

The outdoor high-voltage SF6 open-type combined apparatus stands out as an integrated electrical device specifically designed for high-voltage power transmission and distribution systems. Its unique composition includes circuit breakers, disconnectors, earthing switches, current transformers, voltage transformers, and surge arresters, all enclosed in a metal housing filled with sulfur hexafluoride (SF6) gas, a highly effective insulating medium.

Working Conditions and Environment:

The SF6 open-type combined apparatus is designed to operate reliably in a wide range of environmental conditions, including:

- Ambient temperature: -40°C to +55°C

- Altitude: Up to 2000 meters above sea level

- Humidity: Up to 95% relative humidity

- Pollution degree: Up to Class IV according to IEC standards

- Seismic conditions: Designed to withstand seismic forces as per relevant standards

Product Features:

- High reliability and safety due to SF6 gas insulation

- Compact design with reduced footprint

- Easy maintenance and operation

- Long service life with minimal maintenance requirements

- Environmentally friendly as SF6 is a non-toxic, non-flammable gas with a high global warming potential (GWP)

- High resistance to environmental pollution and harsh weather conditions

Product Parameters:

- Rated voltage: Typically ranges from 72.5 kV to 550 kV

- Rated current: Varies depending on the application, typically from 1250 A to 4000 A

- Rated short-circuit breaking current: Up to 63 kA

- Rated short-time withstand current: Up to 63 kA for 3 seconds

- Rated peak withstand current: Up to 170 kA

Components and Construction:

- Circuit Breaker: Designed to interrupt fault currents and perform switching operations

- Disconnector: Used to isolate the circuit for maintenance purposes

- Earthing Switch: Provides a safe grounding point for the circuit

- Current Transformers (CTs): Used for measuring current in the circuit

- Voltage Transformers (VTs): Used for measuring voltage in the circuit

- Surge Arresters: Protect the equipment from voltage surges

- SF6 Gas System: Ensures proper insulation and arc quenching within the apparatus

Application Range:

- Substations for power generation, transmission, and distribution

- Industrial power systems

- Renewable energy integration (e.g., wind farms, solar parks)

- Urban and rural power distribution networks

Installation Method:

- The installation process involves several steps:

 1. Site preparation: Ensuring a level and stable foundation for the apparatus

 2. Assembly: Connecting the various components according to the manufacturer's instructions

 3. Gas filling: Filling the SF6 gas to the specified pressure

 4. Testing: Conducting electrical and mechanical tests to ensure proper operation

 5. Commissioning: Final checks and adjustments to ensure the apparatus is ready for operation

The outdoor high voltage SF6 open-type combined apparatus plays a pivotal role in modern power systems, providing not only reliable and efficient operation but also ensuring safety and environmental protection, a responsibility we take seriously.