1.Product Overview
        High-voltage motor control switchgear features a modular metal-clad structure, comprising circuit breaker, cable, relay, and busbar compartments. Key components include vacuum circuit breakers (VCB), current transformers (CT), voltage transformers (VT), multifunction protection relays, and surge arresters. Compliant with IEC 62271-200 “AC Metal-Enclosed Switchgear and Controlgear”, it ensures operational safety in solid/resistance-grounded neutral systems.

2. Primary Functions
        Motor Control: Supports direct-on-line (DOL), soft-start, and variable frequency drive (VFD) starting (requires integrated VFD compartment).
Integrated Protection:
        Inverse-time overcurrent protection (IEC 60255-151)
        Instantaneous short-circuit protection (IEC 60255-3)
        Earth fault protection (core-balanced CT or residual current monitoring)
        Undervoltage/overvoltage, phase loss, stall, and unbalance protection.
        Condition Monitoring: Real-time measurement of current, voltage, power factor, and temperature.
        Safety Interlocks: Mechanical/electrical five-safety interlocking (IEC 62271-200) to prevent maloperation.
        Communication: Supports Modbus RTU/TCP and IEC 61850 GOOSE/MMS protocols for DCS/SCADA integration.

3.Product Features
        High Reliability: Vacuum interruption technology eliminates arcing risks; maintenance-free interval >10 years.
        Smart Integration: Embedded  protection relays (IEC 60255 series) with fault recording and remote diagnostics.

Enhanced Safety:
        Pressure relief venting (Internal Arc Fault Withstand Level: AFLR 40kA/1s per IEC 62271-200 Annex AA)
        Automatic shutter system for contact protection.
        Compact Modularity: Expandable with metering, VT, or surge arrester compartments.
        Ease of Maintenance: Withdrawable breaker carriage with Test/Disconnect/Connect positions.
        Eco-Friendly Design: SF₆-free insulation (dry air) compliant with IEC 62271-201 environmental standards.

Product Parameters
        Circuit Breaker Type: Vacuum circuit breaker (IEC 62271-100); mechanical endurance: 10,000 operations; electrical endurance: 100 full-capacity interruptions.
        Insulation Medium: Dry air / SF₆ (specific designs).
        Temperature Rise Limit: ≤65K for main circuits (at 40°C ambient, IEC 62271-1).
        Partial Discharge Level: ≤10pC (for 12kV systems, IEC 60270).
        Control Supply: DC 110V/220V or AC 230V, ±10% tolerance.
        Ambient Conditions: Operating temperature -25°C to +55°C; ≤95% relative humidity (non-condensing).

Switchgear Models & Dimensions
        Standard Models: KYN28A-12, UniGear ZS1 (vacuum type); constructed as metal-clad withdrawable type (IEC 62271-200).

        Typical Dimensions:
        Width: 800/1000mm
        Depth: 1500/1800mm
        Height: 2200/2300mm
        (Note: Dimensions may vary based on circuit breaker type and scheme configuration).