Products Switchgear Medium-Voltage Switchgear

24/12kV SF6 Gas Insulated Medium Voltage Switchgear

Material: carbon steel/stainless steel
Color: Customizable
Place of Origin: Shanxi, China
Application: Industrial
Product Category: Industrial Automation Control

This 24/12 kV SF₆ gas‑insulated medium‑voltage switchgear is intended for 24 kV / 12 kV three‑phase AC medium‑voltage distribution systems. Using SF₆ gas as the insulating medium, it features a fully‑sealed metal‑enclosed construction with compact footprint, high reliability, maintenance‑free performance and long service life. It is equipped with vacuum circuit breaker, disconnector, earthing switch, voltage transformer, current transformer, surge arrester and other components. Multi‑protection functions including over‑current, instantaneous over‑current, earth‑fault, over‑voltage and under‑voltage are available. It performs power distribution, control and protection for medium‑voltage power grids, meeting medium‑voltage power‑supply requirements for substations, industrial & mining facilities, commercial complexes, data centers and other facilities.

‑ Rated Voltage: 24 kV / 12 kV
‑ Rated Current: 630 A ~ 3150 A
‑ Rated Short‑circuit Breaking Current: 20 kA ~ 40 kA
‑ Insulating Medium: SF₆ gas
‑ Protection Class: IP3X
‑ Compliance Standards: GB 3906, IEC 62271‑200
‑ Construction: Fully‑sealed metal‑enclosed design; vacuum circuit breaker as the interrupting element
‑ Protection Functions: over‑current, instantaneous over‑current, earth‑fault, over‑voltage, under‑voltage and zero‑sequence protection
‑ Optional Features: intelligent comprehensive protection relay, motor‑operated mechanism, remote monitoring system

① SF₆ gas insulation delivers outstanding dielectric performance and enables compact switchgear design. It occupies only 1/3‑1/2 of the floor space required by conventional air‑insulated switchgear, greatly saving substation footprint.
② Fully‑sealed metal‑enclosed structure isolates internal components from ambient conditions. It resists dust, humidity and heavy pollution for high operational reliability, suitable for outdoor, high‑altitude and heavily polluted sites.
③ Vacuum circuit breaker provides stable performance and long service life, with mechanical endurance of 30 000 operations and electrical endurance of 10 000 operations, minimizing frequent maintenance work.
④ Maintenance‑free design. Thanks to the fully‑sealed enclosure and low SF₆ gas leakage rate, 20‑year maintenance‑free operation can be achieved under normal service conditions, significantly cutting operation‑and‑maintenance costs.
⑤ Intelligent‑ready design. Optional intelligent protection relays, motor‑driven operating mechanisms and remote monitoring systems support intelligent protection, remote operation, condition monitoring and fault early warning, aligning with smart‑grid development requirements.

‑ Urban substations
‑ Main step‑down substations for industrial and mining enterprises
‑ Medium‑voltage distribution systems for commercial complexes
‑ Medium‑voltage power distribution for data centers
‑ Medium‑voltage distribution systems for hospitals
‑ Medium‑voltage power supply for airports and high‑speed‑rail stations
‑ Step‑up stations for photovoltaic power plants
‑ Box‑type transformers for wind farms
‑ Underground medium‑voltage distribution for mines
‑ Medium‑voltage power distribution for ports and terminals

Q1: What is the difference between SF₆ gas‑insulated medium‑voltage switchgear and conventional air‑insulated switchgear?

A: SF₆ gas‑insulated switchgear uses SF₆ gas for superior insulation, enabling a much smaller footprint. Its fully‑sealed enclosure is immune to external environmental influences for enhanced reliability in harsh conditions. Fitted with long‑life vacuum circuit breakers, it supports maintenance‑free operation. By contrast, conventional air‑insulated switchgear takes up more floor space, is susceptible to ambient conditions and requires periodic maintenance.

Q2: What differentiates 24 kV switchgear from 12 kV switchgear?

A: 24 kV switchgear applies to 24 kV medium‑voltage systems. It demands higher insulation capability and handles larger power loads, making it suitable for large‑scale substations and main step‑down stations of heavy industrial‑mining complexes. 12 kV switchgear is the most widely‑adopted medium‑voltage solution domestically and fits most medium‑voltage distribution applications for commercial and industrial facilities.

Q3: Can it operate maintenance‑free?

A: Built with fully‑sealed construction featuring low SF₆ leakage rate and long‑life vacuum circuit breaker, this unit allows 20‑year maintenance‑free service under normal operating conditions. Only routine visual inspections are needed, substantially reducing O&M expenses.