To meet the rising global demand for uninterrupted power in fire safety, medical facilities, data centers, solar microgrids and high-rise commercial buildings, our company officially releases the upgraded LMS2 Series PC-Class Automatic Transfer Switching Equipment (ATSE) this month. Built fully in compliance with IEC 60947-6-1 international standards, the LMS2 range covers 63A to 800A rated current with GN1, GA split type and GA1 economic variants, integrating phase loss, overvoltage/undervoltage protection, fire linkage control and automatic generator start output to deliver all-in-one reliable dual-power switching solutions for worldwide low-voltage distribution projects.

Against the backdrop of frequent grid instability, booming off-grid solar storage and stricter fire electrical codes across Southeast Asia, the Middle East, Africa and Europe, standard dual power switches can hardly satisfy multi-scenario complex power demands such as fire emergency cut-off, generator auto-start and hybrid grid-solar-battery switching. Our engineering team optimized mechanical structure, control terminal logic and safety interlock systems after 18 months of field testing, launching the brand-new LMS2 ATS series with three configurable controller types to cover entry-level to mission-critical engineering needs.

Complete Product Portfolio & Frame Specifications

The LMS2 ATSE lineup includes 4 frame sizes: 63, 125, 250, 400, 800 Amp, supporting 3P/4P pole configurations and three controller versions:

1. GN1 Normal Integrated Controller: Built-in unit with phase loss, under/over voltage protection, dedicated for fire protection loads; equipped independent neutral wiring terminals for three-phase 4-wire systems.
   
2. GA Split Remote Controller: Separable control panel connected via wiring harness, suitable for cabinet door remote monitoring and large integrated power distribution panels.
   
3. GA1 Economic Controller: Cost-effective basic variant retaining core phase loss switching function for general commercial and residential backup power systems.
   

All models adopt PC-class integral changeover structure with double-break horizontal pull contacts, rated transfer time under 2 seconds, rated short-time withstand current up to 16kA/60ms for the 800A frame, fully meeting AC-33iB heavy-load switching category requirements. The whole series reaches IP20 housing protection grade, working stably in -5°C ~ +40°C ambient temperature with altitude below 2000m, adapting to tropical humid and dusty industrial environments.

Core Upgraded Functional Highlights (Unique Selling Points)

1. **Professional Fire Linkage Passive Control Terminals Independent terminals 3-4 support passive fire input signal; short-circuit the two ports to force the ATS to double-break isolation position, cutting off both main and standby power simultaneously to satisfy fire safety mandatory standards. Matching passive feedback terminals 5-6 feed real-time isolation status to fire alarm control panels for full system linkage monitoring.
2. **Built-in Generator Auto-Start Signal Output Terminals 9-10 provide passive dry contact output to directly connect generator controllers. When main power fails, the ATS sends trigger signal to start diesel backup generators automatically without additional intermediate relays, simplifying wiring for solar-generator hybrid microgrid systems widely deployed in rural Africa and Southeast Asia.
   

3. **Multi-Position Passive Status Feedback Rich dry contact signals cover four core working states: main power closed, standby power closed, double-break isolation, auto running mode. Installers can connect indicator lights, PLC or remote SCADA systems to realize real-time unattended power room monitoring, ideal for telecom base stations and unmanned factory workshops.
4. **Strict Phase Sequence Protection & Anti-Parallel Interlock Mechanical + electrical double interlock design completely avoids parallel connection of two power sources to eliminate reverse power feed risks. The controller continuously detects phase loss, unbalanced voltage and wrong phase sequence; switching action is locked if main and standby phase sequences mismatch to protect downstream sensitive loads like medical equipment and semiconductor production lines.
5. **Flexible Manual & Automatic Dual Operation All LMS2 ATS come with dedicated manual operating handle. When the intelligent controller malfunctions or during routine maintenance, engineers can manually complete three-cycle switching without power supply. The switch body has lockable isolation position to comply with maintenance safety isolation specifications.

Wide Application Scenarios

The LMS2 PC-class automatic transfer switch targets all critical power continuity sectors:

• Fire protection systems: High-rise buildings, shopping malls, chemical plants fire pump and emergency lighting loads
• Medical infrastructure: Hospitals, clinics ICU life-support equipment backup power
• Renewable energy: Grid + solar + battery + generator hybrid off-grid microgrids
• Data & communication: IDC computer rooms, remote telecom tower base stations
• Industrial manufacturing: Continuous production assembly lines, water treatment plants
• Municipal public facilities: Banks, subway stations, airport emergency power distribution

Our advantages

“Traditional ATS often lack standardized fire linkage and generator trigger terminals, requiring customers to add extra auxiliary relays on-site, which raises installation costs and hidden wiring risks,” said our Chief Electrical Engineer. “The new LMS2 series integrates all common engineering functional terminals in factory pre-design, unifying wiring logic across GN1/GA/GA1 variants. Contractors can finish commissioning within 30% less time, and the unified IEC certification supports direct export to over 50 global markets without additional compliance testing.”

Support and purchasing information

The full LMS2 ATS datasheet, wiring diagrams and installation dimension drawings are available for free download on our official website. We support customized controller logic, OEM brand printing and complete ATS distribution cabinet integrated solutions for bulk project orders. Global customers can submit project parameters including rated current, pole number, controller type and special fire/energy storage requirements to obtain tailored quotation within 24 hours.