HV EQUIPMENT · CIRCUIT BREAKERS

HV Circuit Breakers

High-voltage circuit breaker solutions for reliable interruption, operational safety and demanding environmental conditions in transmission and substation applications.

HV CIRCUIT BREAKER / SWITCHING FUNCTION

HV FEEDER — CIRCUIT
BREAKER — SYSTEM
INTERFACE

Conceptual switching topology; no device rating implied.

TECHNICAL OVERVIEW

Three breaker platforms for high-voltage switching duty.

LMZ supplies dead-tank, hybrid and live-tank circuit breaker solutions. Product selection depends on voltage level, continuous current, short-time withstand duty, environmental conditions and the wider substation arrangement.

PRODUCT SCOPE

Dead tank, hybrid and live tank configurations.

Dead Tank CB

Designed for reliable performance, maximized safety and operation in extreme environmental conditions including high elevation, severe temperatures, seismic zones and polluted or corrosive atmospheres.

Up to 550 kV · Up to 5000 A · Up to 63 kA

Hybrid CB

Compact hybrid switchgear combining circuit breakers, disconnectors and earthing switches in a common gas tank, with current and voltage transformers available as part of an integrated solution.

Up to 550 kV · Up to 5000 A · Up to 63 kA

Live Tank CB

Widely used high-voltage breaker design suitable for seismic, polluted and low-temperature environments.

Up to 800 kV · Up to 5500 A · Up to 63 kA

Selection Basis

Configuration is selected around system voltage, current, fault duty, environmental exposure and substation layout.

Project-specific engineering and supply

SYSTEM APPLICATION

For transmission substations and demanding high-voltage switching applications.

Transmission and grid substations.

High-seismic and high-altitude installations.

Polluted or corrosive environments.

Projects requiring compact hybrid high-voltage switching arrangements.

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