Full-range Certifications, Empowering Solutions ┃ Huanyu SLVA Low-Voltage Switchgear Selection Guide for 8 Cabinet Types
Industry: News
2026-09-17
Standardization is the inevitable path for power distribution equipment to achieve higher reliability. With the release and implementation of State Grid Q/GDW 12127—2025 Technical Specification for Low-Voltage Switchgear, standardized low-voltage switchgear (SLVA) is being rapidly deployed in power distribution frontlines. Faced with this brand-new technical system, Huanyu Hi-Tech has completed the full-series tests and certifications for SLVA-specific air circuit breakers and moulded case circuit breakers as one of the first batch of enterprises. It also provides selection solutions covering “4 categories and 8 standard cabinet types” to help panel builder partners achieve rapid implementation. Components form the backbone, and solutions deliver the answers. Below is the configuration list for the eight cabinet models for your direct reference and selection.
Incoming Cabinet·First Line of Defense Standardized Low-Voltage Assembly Main incoming circuit, with horizontal bus current ratings of 1250/2000/2500A, adopting Huanyu HYW3P air circuit breaker. The station service circuit is equipped with HYM3EP-100A moulded case circuit breaker, as well as secondary components including multi-function meters, transfer switches, signal lamps and push buttons.
Bus Coupler Cabinet·Power Supply Hub Standardized Low-Voltage Assembly The bus coupler cabinet connects two bus sections and is equipped with HYW3P air circuit breakers of the same specification as those in the incoming cabinet, ensuring parallel operation and selective coordination while balancing power supply continuity and maintenance safety.
Feeder Cabinet·Main Outgoing Feeder Standardized Low-Voltage Assembly Divided into two groups: air circuit breaker feeders (630A) and moulded case circuit breaker feeders (250/400/630A), covering four typical outgoing combinations: 2×630A, 3×630A, 2×250A+4×400A and 4×630A.
Reactive Power Compensation Cabinet·Power Quality Regulator Standardized Low-Voltage Assembly The main switch adopts HYM3EP moulded case circuit breaker (400/630/800A), compatible with SVG or intelligent capacitor compensation solutions to improve power factor and reduce line losses.
Standardization is not a threshold, but an opportunity. With fully certified components and proven solutions, Huanyu Hi-Tech stands side by side with every panel builder partner to embrace the SLVA standardization era. Please contact Huanyu’s regional sales team for the complete 8-cabinet solutions or technical support. Huanyu Electric, Committed to Smart Electrical Solutions for a Better Life!
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