Core Technical Specifications

• Phase Configuration: Single-phase

• Rated Frequency: 50Hz

• Rated Voltage: 0.4kV (400V AC)

• Rated Current: 630A

• Transient Current Rating: 16kA

• Control Voltage: AC220V (switching operations)

• Mechanical Endurance: 20,000 operations

• Installation Environment: Indoor use only

• Enclosure: Electromagnetic shielded design

Primary Functions

• Electrical Isolation: Physical circuit separation capability

• Remote Operation: Switch-on/off via control signals

• Protection Systems:

• Over-voltage protection

• Over-current protection

• Measurement & Indication: Real-time electrical parameter monitoring

Key Components

• Instrument Transformers:

• Current transformers (CTs)

• Voltage transformers (VTs)

• Switching Devices:

• AC contactors

• Grounding switches

• Protection Relays:

• Current relays

• Voltage relays

• Intermediate (auxiliary) relays

• Control Interface:

• Operation buttons

• Status indicator lamps

Shielded Enclosure Features

• EMI/RFI electromagnetic shielding

• Corrosion-resistant coated steel

• Touch-safe design per IEC 61439

• Ventilation with particulate filters

• Grounding continuity assurance

Industrial Applications

• Commercial building main distribution panels

• Data center power distribution units

• Laboratory critical power systems

• Hospital electrical infrastructure

• Indoor industrial substations

Installation Requirements

Protection Coordination

• 16kA transient current withstand (3-cycle)

• Over-voltage threshold: 110% of rated voltage

• Over-current tripping: 125% of rated current

• Ground fault detection: 10% imbalance sensitivity

• Arc-flash mitigation design

Maintenance Protocol

1. Monthly: Visual inspection of indicators and contacts

2. Quarterly: Relay functional testing

3. Biannual:

• Contact resistance measurement

• Shielding integrity verification

4. Annual:

• Dielectric strength test (2.5kV AC)

• Protection relay calibration

Compliance Standards

• IEC 61439: Low-voltage switchgear assemblies

• IEC 62271: High-voltage switchgear standards

• IEEE C37.20: Indoor switchgear requirements

• EMC Directive 2014/30/EU

Certified for indoor electrical distribution in commercial and light industrial environments.