JCZ8G-12 High Altitude Vacuum Contactor | Reliable 12kV Motor and Transformer Control | Chennuo Electric-Chennuo Electric Technology Group Co., Ltd

JCZ8G-12 Vacuum Contactor for high-altitude applications

JCZ8G-10kv(12 kv) Vacuum Contactor for high-altitude applications

This series of high-altitude high-voltage vacuum contactors have been developed by our company in response to market demands. We use high-quality vacuum interrupters , which achieves military-grade quality. The structure consists of a metal frame and insulating supports, ensuring robustness and reliability with more stable performance. The main circuit center distance ranges from 190mm to 210mm. The main circuit vacuum arc-extinguishing chamber features a sealed structure, providing stable and reliable insulation performance with a large creepage distance, large stroke, and strong breaking capacity. It is suitable for plateau and high-altitude areas with altitudes between 2000 and 4000 meters. It is used for long-distance switching, analysis, and frequent starting and controlling of AC motors, transformers, and capacitors, and other applications. There are two types available: electromagnetic holding and permanent magnet holding.

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Feature

Designed for High-Altitude Operation: Specially optimized for plateaus and high-elevation regions ranging from 2000 meters to 4000 meters (and below).

Military-Grade Vacuum Interrupters: Built with premium vacuum switches sourced from military-grade manufacturing lines to guarantee exceptional reliability and stable performance.

Solid-Sealed Pole Architecture: The main circuit vacuum interrupters adopt a solid-sealed structure, providing stable and reliable insulation alongside large creepage distances to prevent flashovers.

Robust Structural Framework: Formed by a sturdy metal frame and an insulation bracket, delivering high mechanical rigidity and operational safety.

Flexible Holding Mechanisms: Available in two operational holding configurations: electromagnetic holding and permanent magnet holding.

Optimized Dimensions: Features a main circuit center distance ranging from 190mm to 210mm with a large operational stroke and strong breaking capacity.

Parameter

Tech. parameters	Unit	160/12KV	250/12KV	400/12KV	630/12KV	800/12KV
Rated voltage of Main Loop	(KV)	12	12	12	12	12
Rated current of Main Loop	(A)	160	250	400	630	800
Main loop making capacity	(A/100times)	1600	2500	4000	6300	8000
The main circuit is on/off	(A/25times)	1280	2000	3200	5000	6000
Ultimate breaking capacity	(A/3times)	3200	4000	4500	6300	8000
Mechanical life	(10,000 times)	100	100	100	100	100
Electrical endurance AC3	(10,000 times)	25	25	25	25	25
Power-frequency withstand voltage of main circuit (fracture)	(KV)	48	48	48	48	48
Phase-phase/phase-to-ground power frequency withstand voltage	(KV)	50	50	50	50	50
Lightning impulse withstand voltage	(KV)	75	75	75	75	75
Rated operating frequency	(Times/h)	300	300	300	300	300
Terminal voltage	(N)	>100	>100	>100	>100	>100
Clearance between open contacts	(mm)	7±0.5	7±0.5	7±0.5	7±0.5	7±0.5
Overtravel	(mm)	1.5±0.5	1.5±0.5	1.5±0.5	1.5±0.5	1.5±0.5
weight	(KG)	35	35	35	35	35
Main loop resistance	(μΩ)	≤200	≤200	≤200	≤200	≤200
Secondary control voltage	(V)	AD or DC: 110/220/380 or customized

Typical Application Scenarios：

High-Altitude Power Grids & Substations: Deployed in regions with elevations between 2000m and 4000m for long-distance power making and breaking.
Frequent Motor Starting & Control: Ideal for heavy industrial settings requiring frequent starting, stopping, and control of high-voltage AC motors.
Transformer & Capacitor Switching: Reliable operation for controlling transformers and switching capacitor bank loads in plateau environments.

Why Choose Chennuo Electric?

Specialized Plateau Engineering: Unlike standard contactors that suffer from insulation degradation at high elevations, our JCZ8G-12 series is purpose-built with extended creepage distances for high-altitude reliability.
Versatile Holding Options: Offers both electromagnetic and permanent magnet holding mechanisms to match your secondary control system specifications.
Global Export Readiness: Backed by professional technical support, export-grade packaging, and strict adherence to international safety and quality standards.

Frequently Asked Questions (FAQ)

Q1: What makes the JCZ8G-12 different from standard vacuum contactors?
A: The JCZ8G-12 is specifically engineered as a high-altitude (plateau) model. It features larger creepage distances, a solid-sealed pole structure, and optimized insulation coordination designed to withstand the reduced air density found at elevations between 2000m and 4000m.

Q2: What is the specific altitude range supported by this contactor?
A: It is specifically designed and rated for high-altitude and high-elevation regions ranging from 2000 meters to 4000 meters below sea level.

Q3: What holding mechanism options are available for the JCZ8G-12?
A: This series provides two types of holding modes to accommodate your control system requirements: electromagnetic holding and permanent magnet holding.

Q4: What types of electrical loads can the JCZ8G-12 control?
A: It is designed for long-distance connection, analysis, and frequent starting/control of AC motors, transformers, and capacitor bank applications in plateau environments.