MV & HV VACUUM CIRCUIT BREAKERS

Medium-Voltage Vacuum Circuit Breakers: From Standard Distribution to Severe Duty

A complete portfolio covering indoor and outdoor protection. Featuring the industry-standard VS1 for reliable distribution and the ultra-durable LZND series with electric repulsion technology for frequent switching applications.

From outdoor pole-mounted ZW32/ZW20 units to indoor metal-clad solutions, XBRELE helps OEMs and utilities build safer networks. Uniquely, we offer high-endurance VCBs (up to 300,000 operations) for mining and industrial automation.

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Overview

Reliable protection for 12kV–40.5kV networks

XBRELE provides a comprehensive range of vacuum circuit breakers (VCBs) optimized for utility grids, industrial plants, and mining operations. Our portfolio spans from outdoor pole-mounted units (ZW32/ZW20) to indoor metal-clad solutions (VS1/ZN85).

Uniquely, we offer specialized solutions for frequent operation scenarios. Utilizing advanced electric repulsion mechanisms (LZND Series), we achieve mechanical lives up to 300,000 operations—far exceeding industry norms for standard spring-operated breakers.

Whether you need a standard VCB for a KYN28 panel or a severe-duty breaker for an electric arc furnace, XBRELE ensures reliable switching performance in harsh environments, from high-altitude plateaus to humid coastal regions.

Product Series

ZW32, ZW20, VS1 and ZN85 — one MV vacuum circuit breaker portfolio

From pole-mounted ZW32 and ZW20 outdoor units to VS1 and ZN85 indoor vacuum circuit breakers, XBRELE provides a complete MV vacuum circuit breaker portfolio for 11kV–40.5kV distribution networks.

ZW32 OUTDOOR VACUUM CIRCUIT BREAKER

ZW32 pole-mounted vacuum circuit breaker for 11kV–33kV feeders

ZW32 is XBRELE’s outdoor pole-mounted vacuum circuit breaker for rural and urban distribution networks. It combines vacuum interruption technology with reliable spring mechanisms to provide fast fault clearing and sectionalizing on 11kV–33kV feeders.

Typical applications include overhead line feeder breakers, auto-reclosing points and compact pole-top substations where compact size, low maintenance and high reliability are critical.

Key features at a glance
  • Rated voltage up to 36kV, breaking current up to 25–31.5kA
  • Single-shot or multi-shot auto-reclosing schemes
  • Outdoor epoxy or porcelain insulators for polluted areas
  • Motorized operating mechanism for remote control & automation
  • Compact pole-mounted design with flexible mounting brackets
  • Customizable for OEM switchgear panels and utility standards
View ZW32 vacuum circuit breaker series →
ZW32 SERIES
ZW32 outdoor vacuum circuit breaker line-art illustration by XBRELE
Line-art view of the ZW32 outdoor vacuum circuit breaker — showing three-phase pole-mounted design, post insulators and operating mechanism layout.
ZW20 SERIES
ZW20 SF6 vacuum recloser and sectionalizer line-art illustration by XBRELE
Line-art view of the ZW20 vacuum recloser / sectionalizer — showing SF6 tank, operating mechanism and bushing layout for MV feeder automation.
ZW20 VACUUM RECLOSER / SECTIONALIZER

ZW20 SF6 vacuum recloser for smart feeder automation

ZW20 is XBRELE’s SF6-insulated vacuum recloser and sectionalizer for MV distribution feeders. It integrates vacuum interrupters, current transformers and intelligent control to deliver fast, selective fault clearing and self-healing distribution networks.

Typical use cases include feeder automation schemes, loop and radial networks, smart recloser points and pole-top substations where remote control and high reliability are required.

Key features at a glance
  • 11kV–24kV SF6 tank-type vacuum recloser up to 25kA
  • Configurable single-shot / multi-shot reclosing curves
  • Integrated CTs & VT inputs for protection and metering
  • Remote control via RTU / SCADA / IEC 60870 / IEC 61850 (on request)
  • Sectionalizer logic for improved service continuity
  • Compact pole-mounted design for fast installation
View ZW20 vacuum recloser series →
VS1 & LZND INDOOR CIRCUIT BREAKER SERIES

VS1 & LZND indoor vacuum circuit breakers for 12kV–24kV switchgear

This series combines the industry-standard VS1 for general 12kV–24kV distribution with the premium LZND for severe duty. While VS1 offers reliable protection for KYN28 panels, LZND features a unique electric repulsion mechanism, delivering an ultra-long life of 300,000 operations.

The portfolio covers all indoor needs: from utility feeders to demanding industrial applications like soft starters, electric arc furnaces, and mining equipment where frequent switching is critical.

Key features at a glance
  • Comprehensive range: 12kV (LZND) to 24kV (VS1)
  • Standard spring (VS1) or electric repulsion mechanism (LZND)
  • Life: Standard endurance vs 300,000 ops (LZND)
  • Available in withdrawable truck or fixed-mounted designs
  • Optimized for KYN28 panels and frequent operation duty
  • Maintenance-free options for severe industrial environments
View VS1 & LZND vacuum circuit breaker series →
VS1 / LZND SERIES
VS1 indoor vacuum circuit breaker line-art illustration by XBRELE
Line-art view of the VS1 indoor vacuum circuit breaker — showing withdrawable truck, front panel layout and main connection interfaces for 12kV–24kV switchgear.
ZN85 SERIES
ZN85 40.5kV indoor vacuum circuit breaker line-art illustration by XBRELE
Line-art view of the ZN85 indoor vacuum circuit breaker — showing high-voltage insulation distances, fixed and withdrawable arrangements for 40.5kV metal-clad switchgear.
ZN85 INDOOR VACUUM CIRCUIT BREAKER

ZN85 40.5kV indoor vacuum circuit breaker for high-voltage switchgear

ZN85 is XBRELE’s 40.5kV indoor vacuum circuit breaker for high-voltage metal-clad switchgear. It is designed for primary substations and heavy-duty industrial distribution systems requiring high insulation levels and reliable interruption performance.

Typical applications include 35kV–40.5kV utility substations, heavy industry, primary feeders and transformer protection panels using KYN61 and similar switchgear types.

Key features at a glance
  • ZN85 vacuum circuit breaker for 40.5kV switchgear
  • High creepage distance and insulation levels for HV applications
  • Compatible with KYN61 and other 40.5kV metal-clad panel designs
  • Spring-operated mechanism with robust mechanical endurance
  • Customizable for OEM panel builders and retrofit projects
  • Ideal for primary substations and heavy industrial power systems
View ZN85 vacuum circuit breaker series →
Technical Features

Advanced operating mechanisms, insulation, and performance parameters

XBRELE medium-voltage vacuum circuit breakers are built around high-performance vacuum interrupters, epoxy embedded poles, and robust operating mechanisms. Whether utilizing standard spring technology or advanced electric repulsion mechanisms, our VCBs are engineered for reliable switching in outdoor lines and severe indoor industrial applications.

  • High Mechanical Endurance: From standard 30,000 operations (VS1) up to 300,000 operations (LZND) for frequent switching duties.
  • Short-Circuit Breaking: Capability up to 50kA depending on rating, suitable for heavy-duty industrial protection.
  • Robust Insulation: Epoxy embedded poles tested for pollution, altitude, and humidity to ensure consistent dielectric performance.
  • Mechanism Choice: Reliable spring-operated mechanisms for distribution or electric repulsion mechanisms for ultra-fast response and long life.
  • Full Compliance: Routine and type testing in accordance with IEC 62271-100 / 111 and specific customer requirements.
Applications

From distribution grids to severe industrial duty

XBRELE vacuum circuit breakers provide reliable medium-voltage protection across overhead lines and metal-clad switchgear. We support utilities, OEMs, and heavy industries with solutions ranging from standard distribution to frequent operation scenarios.

Utility MV distribution networks

Vacuum circuit breakers for feeder protection, automatic recloser points and sectionalizing on 11kV–33kV overhead lines, pole-mounted systems and compact substations.

Heavy Industry & Mining

Severe-duty VCBs for electric arc furnaces, rolling mills, mining hoists, and petrochemical facilities where high reliability and frequent switching are essential.

Renewables & Soft Starters

MV interface protection for solar/wind farms and battery storage. Ideal for high-voltage soft starter cabinets requiring robust switching and longevity.

OEM panels & replacement projects

Integrated into KYN, XGN, HXGN and custom MV switchgear panels — also available as replacements or equivalent options for legacy and branded vacuum circuit breaker models.

Why XBRELE

Component-level expertise, system-level understanding

XBRELE is not just an assembler. We design and manufacture core components in-house—from vacuum interrupters to advanced **electric repulsion mechanisms**—giving us unique flexibility to meet both standard OEM needs and severe industrial requirements.

In-House Core Technology

We manufacture our own vacuum interrupters, embedded poles, and specialized **electric repulsion mechanisms**, ensuring complete quality control from component to assembly.

Proven in Harsh Industries

Extensive experience supplying high-endurance VCBs for mining, metallurgy, and cement plants, alongside standard utility projects in India, Russia, and the Middle East.

Flexible Customization

Whether you need a standard KYN28 retrofit or a custom **frequent-operation** breaker solution, we adapt our designs to fit your specific panel and performance needs.

Rigorous Verification

Our VCBs undergo strict routine and type testing, including C2 capacitive switching validation and mechanical endurance tests up to **300,000 operations**.

FAQ

Frequently asked questions about vacuum circuit breakers

Short answers to typical questions from panel builders, EPC contractors and utilities.

How do I choose between ZW32, ZW20, VS1 and LZND series?
ZW32/ZW20 are for outdoor pole-mounted use. VS1 is the standard indoor breaker for KYN28 panels. **Choose the LZND series** if your application requires frequent switching (e.g., electric arc furnaces, soft starters) or ultra-high mechanical life (300,000 ops).
What voltage and short-circuit levels do you cover?
We cover 11kV, 12kV, 24kV, and 40.5kV levels. Short-circuit breaking capacity ranges from standard 20kA up to **50kA** for heavy-duty industrial protection.
When should I use an electric repulsion VCB (LZND) instead of a standard spring VCB?
Standard spring VCBs (like VS1) typically last 20,000–30,000 operations. If your equipment operates dozens of times a day (e.g., mining hoists, metallurgy), standard springs will fail quickly. The LZND’s electric repulsion mechanism is designed for **300,000 operations** and is maintenance-free, making it the cost-effective choice for severe duty.
Can your VCBs replace other brands?
Yes. We provide compatible replacements for existing switchgear, considering mechanical interfaces and electrical ratings. Retrofitting with our high-endurance LZND series can significantly extend the maintenance intervals of older panels.
What standards do you comply with?
Our designs follow IEC 62271-100 (AC circuit breakers) and IEC 62271-111 (Reclosers). We conduct full routine tests and specific type tests like C2 capacitive switching and M2 mechanical endurance.
Do you supply components separately?
Yes. We supply vacuum interrupters, embedded poles, and operating mechanisms (spring or electric repulsion) to OEM panel builders.
Still have questions? Send us your single-line diagram and our engineers will suggest the optimal VCB configuration.