Technical Specifications

• Model: LQPSC 0.4KV/750A

• Phase Configuration: Single-phase

• Rated Voltage: 0.4kV (400V AC)

• Rated Current: 750A

• Frequency: 50Hz

• Short-Circuit Rating: 8kA

• Control Voltage: AC220V (switching operations)

• Mechanical Endurance: 200,000 operations

• Installation: Indoor use only

• Key Features: Isolation switch, switch-on indicator lamp

Core Functional Capabilities

• High-Current Distribution: 750A continuous rating for demanding loads

• Visual Status Monitoring: Integrated switch-on indicator lamp

• Safety Isolation: Physical disconnection capability

• Remote Control: Switch-on/off via 220V control signals

• Fault Protection: 8kA short-circuit withstand capability

Durability & Reliability Features

• Extended Mechanical Life: 200,000 operations (4× industry standard)

• Robust Contact System: Silver-alloy contacts for reduced erosion

• Thermal Management: Optimized heat dissipation design

• Vibration Resistance: Reinforced structural integrity

• Corrosion Protection: Zinc-coated steel construction

Industrial Applications

• Heavy manufacturing power distribution

• Industrial furnace power control

• Large-scale HVAC systems

• Foundry and metal processing equipment

• Industrial pump station control

Protection System Details

Installation Requirements

• Mounting: Floor-standing with M16 anchor bolts

• Clearances:

• Front: 1000mm minimum

• Rear: 300mm minimum

• Environmental Conditions:

• Temperature: -5°C to +40°C

• Humidity: ≤95% RH (non-condensing)

• Altitude: ≤2000m ASL

• Cable Connections: 2× 400mm² per phase

Maintenance Protocol

1. Monthly:

• Visual inspection of indicator lamps

• Verify switch operation smoothness

2. Quarterly:

• Contact resistance measurement

• Terminal torque verification

3. Annual:

• Insulation resistance test (min 1MΩ)

• Full operational sequence test

4. 5-Year:

• Contact replacement (if wear >50%)

• Dielectric strength test (3.5kV AC)

Compliance Standards

• IEC 61439-1: Low-voltage switchgear assemblies

• IEC 60947-3: Switches, disconnectors and fuse-combination units

• ISO 9001: Quality management systems

• RoHS 3: Hazardous substance restriction

Certified for industrial power distribution in demanding environments.