Technical Specifications

• Model: LQPSC 0.4KV/1875A

• Rated Frequency: 50Hz

• Rated Voltage: 0.4kV (400V AC)

• Rated Current: 1875A

• Short-Time Current: 25kA

• Protection Rating: IP20 (finger-safe design)

• Operation Time Delay: 5s

• Control Voltage: 220V AC (switching operations)

• Mechanical Endurance: 10,000 operations

• Installation: Indoor use

Control Panel Features

• Monitoring Instruments:

• Voltmeter for phase-to-phase voltage measurement

• Ammeter for current load monitoring

• Visual Indicators:

• Power supply switch-on indicator lamp

• Power supply switch-off indicator lamp

• Control Functions:

• Remote function selector switch

• Local/remote operation mode

Core Functional Capabilities

• High-Current Distribution: 1875A continuous rating

• Short-Circuit Protection: 25kA withstand capacity

• Delayed Operation: 5-second time delay for protection coordination

• Dual Control Modes: Local and remote operation

• Real-Time Monitoring: Voltage and current measurement

Protection System Details

Industrial Applications

• Steel manufacturing power distribution

• Industrial plant main switchboards

• Data center high-density power systems

• Large-scale industrial motor control

• Foundry and smelting operations

Design & Construction

• Robust Enclosure: 3mm powder-coated steel

• Thermal Management: Forced-air ventilation with filters

• Busbar System: Tin-plated copper with 2500A rating

• Component Layout: Segregated compartments for safety

• Cable Management: Bottom entry with 4×200mm² cable capacity

Installation Requirements

• Mounting: Floor-standing with M20 anchor bolts

• Clearances:

• Front: 1200mm minimum

• Rear: 500mm minimum

• Sides: 300mm minimum

• Environmental Conditions:

• Temperature: 0°C to +45°C

• Humidity: ≤90% RH (non-condensing)

• Altitude: ≤2000m ASL

• Power Connections: 4× 500mm² per phase

Maintenance Protocol

1. Monthly:

• Visual inspection of instruments and lamps

• Verify control voltage stability

2. Quarterly:

• Calibration check of meters

• Busbar connection torque verification

3. Biannual:

• Insulation resistance test (min 1MΩ)

• Time delay function verification

4. Annual:

• Full protection relay testing

• Contact resistance measurement

Compliance Standards

• IEC 61439-1: Low-voltage switchgear assemblies

• IEC 62271-200: AC metal-enclosed switchgear

• IEC 60529: IP degree of protection

• IEEE C37.20: Switchgear standards

Certified for industrial power distribution in high-current applications.