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LV, MV & HV VACUUM CONTACTORS

Vacuum Contactors for Motor Control & Capacitor Switching: 1.14kV to 40.5kV

From heavy-duty low voltage (LV) contactors for mining to medium voltage (MV) vacuum contactors for switchgear. XBRELE offers reliable switching solutions with mechanical life up to 1 million operations for motors, transformers, and capacitor banks.

As an OEM manufacturer, XBRELE serves panel builders and EPCs with a diverse range: standard air-insulated types (CKG/JCZ), solid embedded pole designs (LZNJ), and high-current LV units (CKJ/LCZ).

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VC Portfolio Snapshot
Complete range covering 1.14kV, 7.2kV, 12kV and up to 40.5kV. Includes specialized zero-bounce and solid insulation models.
CKG · JCZ · LCZ · CKJ · LZNJ
Typical use cases: MV motor control centers (MCC), capacitor bank switching, mining hoists, and soft starters.
Overview

Comprehensive vacuum switching: 1.14kV to 40.5kV

Vacuum contactors are the ideal solution for applications requiring frequent operations where circuit breakers are not suitable. XBRELE offers a complete spectrum of switching technologies, from low-voltage (1.14kV) units for mining equipment to medium-voltage (40.5kV) contactors for high-power networks.

Our portfolio includes the robust CKG & JCZ series for standard MV motor control and the premium LCZ/LZNJ series featuring solid embedded poles for harsh, dusty environments.

Uniquely, we also provide high-current Low Voltage (LV) vacuum contactors (up to 3200A) designed specifically for 1140V and 2kV industrial systems. Whether for a soft starter cabinet in a cement plant or a capacitor bank in a utility substation, our contactors deliver maintenance-free performance with electrical holding or mechanical latching options.

Product Series

CKG, JCZ, LCZ and CKJ – complete vacuum contactor portfolio

XBRELE supplies four main vacuum contactor series covering 1.14kV, 7.2kV, 12kV and 40.5kV. From heavy-duty mining contactors to precision MV capacitor switches, we provide the right solution for every industrial and utility application.

CKG VACUUM CONTACTOR SERIES

CKG3 / CKG4 vacuum contactors for 7.2kV & 12kV motor and feeder control

CKG vacuum contactors are the workhorse MV contactors for 3.3kV, 6.6kV and 11kV panels in India. With rated voltages of 7.2kV and 12kV and currents from 160A up to 630A, they are extensively used for motor feeders and specialized back-to-back capacitor bank switching.

Typical installations include cement plants, steel mills, and mining conveyors where frequent switching is required. The CKG4 series features optimizations for reducing bounce time to 0-2ms, extending contact life.

Key features at a glance
  • Rated voltage 7.2kV / 12kV, rated current 160–630A
  • Short-time withstand current up to 10Ie, peak withstand up to 25Ie
  • Zero-bounce technology available to reduce arc reignition
  • Suitable for AC3 / AC4 motor duty and C2 capacitive switching
  • Options for electrical holding and mechanical latching coils
  • Ideal for Indian OEM panel builders using withdrawable or fixed designs
View CKG vacuum contactor series →
CKG SERIES
Line-art placeholder for XBRELE CKG medium-voltage vacuum contactor series
Line-art for CKG3 / CKG4 medium-voltage vacuum contactors used in 7.2kV and 12kV motor control centres and capacitor bank panels.
JCZ SERIES
Line-art placeholder for XBRELE JCZ vacuum contactor series
Line-art for JCZ5 / JCZ1 vacuum contactors – compact MV contactors widely used in 3.3kV and 6.6kV indoor switchgear and capacitor control panels.
JCZ VACUUM CONTACTOR SERIES

JCZ5 / JCZ1 compact vacuum contactors for indoor MV switchgear

JCZ vacuum contactors are compact 7.2kV and 12kV contactors with rated currents from 160A to 630A. They are ideal for indoor metal-enclosed switchgear, ring main units and compact MCCs where panel depth is limited but high reliability is essential.

These units are widely used in F-C (Fuse-Contactor) cabinets for controlling high-voltage motors and transformers in utilities and building services.

Key features at a glance
  • Compact integrated frame structure for space-saving panels
  • Rated voltage 7.2kV / 12kV, mechanical life up to 500,000 operations
  • Compatible with F-C cabinets for short-circuit protection
  • Available in mechanical latching or electrical holding types
  • Flexible auxiliary contact arrangements for protection and interlocking
  • Well-suited to Indian OEMs building compact indoor MV control panels
View JCZ vacuum contactor series →
LCZ VACUUM CONTACTOR SERIES (MV)

LCZ1 / LCZ7 vacuum contactors – enclosed & plateau types up to 40.5kV

The LCZ medium-voltage range features enclosed pole designs and specialized plateau types (GF models) suitable for altitudes up to 3500m. The portfolio extends up to 40.5kV, offering robust single-pole solutions for high-voltage feeder automation and traction power.

These contactors are a good fit for Indian projects in high-altitude regions and demanding applications such as mining, renewable energy, traction power and outdoor control cabinets.

Key features at a glance
  • Rated voltage 12kV & 40.5kV, rated current 160–1250A
  • Enclosed and plateau (GF) types for high-altitude applications
  • Short-time withstand current up to 10Ie, peak withstand up to 25Ie
  • Mechanical life up to 50×104 operations (12kV types)
  • Suitable for outdoor cabinets, capacitor banks and transformer feeders
  • Option to customise terminals, control voltage and auxiliary contacts for OEMs
View LCZ vacuum contactor series →
LCZ SERIES
Line-art placeholder for XBRELE LCZ vacuum contactor series including plateau type and 40.5kV versions
Line-art for LCZ1 vacuum contactors, including enclosed and plateau-type designs for 12kV and 40.5kV systems used in harsh and high-altitude environments.
CKJ / LZNJ SERIES
Line-art for XBRELE Low Voltage CKJ vacuum contactor series
Line-art for CKJ series low-voltage vacuum contactors (1.14kV) and LZNJ resin-embedded pole contactors for heavy-duty mining and industrial applications.
LOW VOLTAGE & SPECIALIZED SERIES

CKJ & LZNJ series for 1.14kV–2kV industrial power & solid insulation needs

This specialized range covers low-voltage (1.14kV) heavy-duty contactors for mining and industrial drives, as well as the LZNJ solid-embedded pole series. The solid insulation technology protects the vacuum interrupter from dust, moisture, and external impact.

Ideal for 1140V mining networks, soft starter cabinets, and harsh environments where air-insulated contactors are prone to failure due to pollution or vibration.

Key features at a glance
  • CKJ Series: 1.14kV / 2kV ratings, high current up to 3200A
  • LZNJ Series: Resin-embedded poles for maintenance-free operation
  • No exposed arc, explosion-proof ready for mining applications
  • Suitable for frequent starting of large LV/MV motors
  • Robust mechanical latching options available
  • Perfect for soft starters and variable frequency drives (VFD)
View LV & Specialized contactor series →
Technical Features

Advanced structure, insulation, and switching performance

XBRELE vacuum contactors utilize sealed vacuum interrupters, robust air or solid-embedded (resin) insulation systems, and reliable electromagnetic or mechanical-latching mechanisms. Our designs are optimized for both low voltage high-current industrial applications and medium voltage distribution networks.

  • Wide Voltage Range: From 1.14kV mining contactors to 40.5kV high-voltage feeder switches.
  • Solid Insulation Technology: Resin-embedded poles available (LZNJ series) for superior dust and moisture resistance in harsh environments.
  • High Performance: Rated currents up to 3200A (LV series) and zero-bounce technology (CKG series) for extended contact life.
  • Flexible Operation: Electromagnetic holding, permanent magnet, or mechanical latching mechanisms to suit various control schemes.
  • Compliance: Engineered to meet IEC 62271-106 standards, ensuring compatibility with global switchgear designs.
Applications

From 1.14kV mining drives to 40.5kV grid switching

XBRELE vacuum contactors are engineered for the most demanding frequent switching duties. Our solutions power industrial motor control centers, mining hoists, and utility capacitor banks, offering robust performance across Low Voltage (1.14kV) and Medium Voltage (up to 40.5kV) networks.

Industrial Motor Control

Frequent starting of MV (3.3kV–11kV) and LV (1.14kV) motors for pumps, fans, and crushers in cement, steel, and petrochemical plants.

Mining & Severe Duty

Specialized 1.14kV vacuum contactors for mining hoists, conveyors, and explosion-proof starters requiring no exposed arc and high vibration resistance.

Capacitor Bank Switching

Zero-bounce CKG series designed for back-to-back capacitor switching in power factor correction panels, minimizing inrush current and reignition risks.

Soft Starters & OEMs

Compact, maintenance-free contactors (LZNJ/LCZ) ideal for integration into high-voltage soft starter cabinets and variable frequency drives (VFDs).

Why XBRELE

Manufacturing expertise: From 1.14kV to 40.5kV

XBRELE is a comprehensive vacuum switching specialist. By manufacturing our own vacuum interrupters, **solid embedded poles**, and operating mechanisms, we ensure consistent quality across our CKG, JCZ, LCZ, and Low Voltage CKJ series[cite: 1309, 1614].

In-house Core Technology

We produce not only vacuum interrupters but also **resin-embedded poles** (LZNJ series) in-house. This vertical integration ensures superior insulation and impact resistance for harsh mining and industrial environments.

Severe Duty Proven

Our contactors are engineered for the toughest jobs: 1140V mining hoists, **high-voltage soft starters**, and frequent-switching electric arc furnaces where standard breakers fail.

Advanced Switching Logic

Featuring patented **Zero-Bounce technology** (CKG4-12L) to eliminate arc reignition in capacitor banks, and **Electric Repulsion mechanisms** for ultra-fast response in critical circuits.

High Endurance Testing

Validated for **C2 class capacitive switching** and extreme mechanical endurance—up to **1,000,000 operations** for our Low Voltage series.

FAQ

Frequently asked questions about vacuum switching solutions

Short technical answers for panel builders and industrial users selecting low and medium voltage switching devices for motor starters, mining equipment, and capacitor banks.

What is the main difference between vacuum contactors and circuit breakers?
Vacuum contactors (like our CKG & JCZ series) are designed for frequent operations—typically up to 500,000 to 1 million cycles—making them ideal for daily motor starting and capacitor switching. In contrast, Vacuum Circuit Breakers (VCBs) are primarily used for short-circuit fault interruption and have a much lower mechanical life (typically 20k-30k operations).
Do you offer contactors for 1.14kV mining applications?
Yes. Our CKJ Low Voltage Series is specifically engineered for 1140V (1.14kV) systems used in underground mining. These contactors feature high vibration resistance, no exposed arcing, and compact designs suitable for explosion-proof enclosures used in hoists and conveyors.
How do you handle capacitor bank switching transients?
For back-to-back capacitor switching, we utilize patented technology found in our CKG4-12L Zero Bounce Contactors. This mechanism absorbs closing impact to reduce bounce time to 0-2ms, significantly minimizing overvoltage and arc reignition risks that can damage capacitors.
Do you provide high-current contactors for heavy industrial loads?
Absolutely. While most MV contactors stop at 630A, our LCZ3 Low Voltage Series offers rated currents up to 3200A at 2kV. This makes them capable of controlling massive industrial motors and main distribution circuits where standard contactors fall short.
When should I choose solid embedded pole (Resin) contactors?
You should choose the LZNJ Solid Insulation Series if your installation environment is dusty, humid, or chemically aggressive (e.g., cement plants or chemical industries). The resin encapsulation effectively protects the vacuum interrupter and main circuit from external pollution and impact.
What standards are relevant for vacuum contactor applications?
Our designs strictly follow IEC 62271-106 for medium-voltage contactors and relevant GB standards. For broader industry context on switchgear standards, you can refer to the IEEE Standards Association resources, which align closely with global best practices for industrial switching.
Can your contactors replace other manufacturers’ models?
Yes. Many OEMs use our CKG and JCZ series as direct replacements for legacy equipment. We can review your existing mounting dimensions and coil voltage to recommend a compatible retrofit solution.
Need support? Send your panel details and our engineers will select a suitable contactor configuration.