Customization Live Tank Vacuum Circuit Breaker 123kV 145kV

Product Overview

The RVB-123/145 series dead tank vacuum circuit breaker is designed and manufactured in compliance with IEC 62271-100:2021 and IEEE standards for indoor and outdoor medium-to-high voltage power distribution applications. It employs a hermetically sealed vacuum interrupter with arc extinction time <10ms, providing reliable interruption of load currents and fault currents.

Rated voltage covers 123kV to 145kV, with non-standard voltages including 69kV and 132kV also available within the 11kV&ndash;145kV range. Custom rated currents are available to meet specific project requirements. The RVB series is ideally suited for grid retrofits, industrial power distribution, and renewable energy power plant grid connection.

Customization Service

Full-dimensional customization of rated voltage, rated current, and phase configuration (single-phase / three-phase) is available to meet diverse global grid standards. Proven non-standard production configurations include 69kV, 75kV, and 132kV. Rated current ranges from 1250A to 3200A, with a maximum customizable rating of 4000A. The series voltage ceiling is 145kV.

Each unit is fully assembled and factory-tested before shipment. Core components require no on-site disassembly, eliminating the need for on-site high-voltage withstand testing and significantly reducing project timelines and site installation costs.

Core Advantages

• Full-Parameter Flexible Customization：Covers standard voltages of 123kV and 145kV, plus non-standard voltages including 69kV and 132kV. Rated current up to 4000A. Single-phase or three-phase configuration available. For medium voltage requirements below 72.5kV, please consult our sales team separately.

• Efficient Vacuum Arc Extinction：High-seal vacuum interrupter with internal vacuum level &le;10⁻⁴ Pa, zero medium contamination. Electrical endurance &ge;10,000 operations at rated current; full-capacity short-circuit interruption &ge;20 operations (Class E2), suitable for frequent switching duty.

• 10‑Year Design Life, Low Maintenance：10‑year design life under normal operating conditions. Vacuum interrupter is maintenance-free for its entire lifetime. Spring operating mechanism requires periodic inspection every 10,000 mechanical operations or every 10&ndash;15 years (whichever comes first), significantly reducing lifecycle inspection and maintenance costs. Suitable for unattended smart substations.

• Wide Temperature Range, Harsh Environment Adaptability：Operating ambient temperature &ndash;50&deg;C to +60&deg;C. Compatible with high-altitude installations (with dielectric derating per IEC 62271‑1), Class IV heavy pollution, 20mm ice coating, and strong wind loads. Both outdoor dead tank pedestal mounting and indoor switchgear integration are available.

• Intelligent Online Safety Monitoring：Standard equipped with mechanical condition monitoring and overcurrent protection devices. Real-time operating data acquisition with advance anomaly warning to prevent insulation breakdown and mechanical jamming.

• Low Partial Discharge, High Insulation Reliability：Typical partial discharge <10pC (at 1.2&times;Ur). The full series has passed power-frequency withstand and lightning impulse withstand type tests, ensuring no discharge risk under long-term high-voltage operation.

• Modular Compact Design：Integrated modular design with small footprint and light weight. Strong electromagnetic interference immunity. Saves installation floor space.

Technical Parameters

Application Scenarios

• Regional Backbone Substations：Suitable for 145kV and below city-level backbone substation outgoing circuits. Custom parameters enable seamless integration into existing in-service grids, providing precise control of main feeder switching and fault protection.

• Renewable Energy Centralized Grid Connection：Customized for distributed photovoltaic and small-to-medium onshore wind power medium-to-high voltage grid connection requirements. Adapts to the intermittent and fluctuating nature of renewable generation, ensuring stable clean energy integration into the regional distribution network.

• Heavy Industry Power Distribution (Metallurgy / Chemical / Building Materials)：Designed for heavy-industry high-power production lines with non-standard voltage and frequent switching duty requirements. Ensures uninterrupted power supply to industrial production lines.