ZCW□-72.5/L Type Outdoor Enclosed SF₆ Combined Electrical Apparatus

 Compliant Standards

 GB156 Standard Voltages

 GB311.1 Insulation Co-ordination for High-Voltage Transmission and Distribution Equipment

 GB11022 General Technical Requirements for High-Voltage Switchgear and Controlgear

 GB1984 Alternating-Current High-Voltage Circuit Breakers

 GB1985 Alternating-Current High-Voltage Disconnectors and Earthing Switches

 GB1207 Voltage Transformers

 GB1208 Current Transformers

 DL/T402 Technical Specification for Ordering Alternating-Current High-Voltage Circuit Breakers

 DL/T486 Technical Specification for Ordering Alternating-Current High-Voltage Disconnectors and Earthing Switches

 DL/T593 Common Technical Specification for Ordering High-Voltage Switchgear and Controlgear

 Main Features

 Transformers, circuit breakers, disconnectors, earthing switches, current transformers, SF₆ voltage transformers, surge arresters, busbars and other components are organically integrated on earthed steel structural supports, featuring a compact structure.

 It occupies only 30%~50% of the space of split-type equipment, which saves land and reduces project construction costs.

 The entire bay is factory prefabricated, with assembly and commissioning completed ex-factory and delivered to the installation site as a whole, shortening the installation period.

 High-performance arc-extinguishing chambers, SF₆ voltage transformers and composite insulator surge arresters are adopted, realizing basically maintenance-free operation and high reliability.

 Factory-prefabricated self-supporting busbars are used between bays, eliminating the need for steel frames and insulators.

 The layout is flexible and adaptable to various wiring modes.

 Operating Environmental Conditions

ZCW□-72.5/L Type Outdoor Enclosed SF₆ Combined Electrical Apparatus is designed for outdoor application and can also be used indoors. The operating environmental conditions are as follows:

 a. Altitude: Not exceeding 2000m.

 b. Ambient temperature: -30℃ ~ +40℃ (-40℃ ~ +40℃ available on request).

 c. Relative humidity: Daily average not more than 95%, monthly average not more than 90% (at 25℃).

 d. Wind speed: Not more than 35m/s.

 e. Pollution class: Class Ⅳ, creepage distance of porcelain bushing greater than 1450mm (nominal creepage distance greater than 31mm/kV).

 f. No flammable, explosive, chemically corrosive or severe vibration environments.

 g. Seismic intensity: Not exceeding Grade 8.

 h. Ice coating thickness: Not more than 10mm.