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The SZD11-100/40001K is a three-phase four-wire (3P+N) manual load disconnector with a rated current of up to 100A. The product is panel-mounted and integrates a padlock locking mechanism, allowing for mechanical locking in the OFF position to prevent accidental operation. Its design conforms to international electrical standards, featuring large insulation distance and fast disconnection characteristics, making it suitable for industrial and commercial power distribution applications requiring high current switching, reliable electrical isolation, and operational safety.
1. Main Technical Specifications
Rated Operating Current: 100A
Rated Operating Voltage: AC 440V, 50Hz
Standards: GB/T 14048.3, IEC 60947-3
Number of Poles and Functions
4 Poles (3P+N)
Two Handle Operation Positions (ON/OFF)
• ON Position: All three-phase main contacts (T1-L1, T2-L2, T3-L3) and the neutral pole (N) are connected.
• OFF Position: All poles (3P+N) are fully disconnected, providing a visible safety isolation point. A padlock can be added at this position (locker supplied separately) to meet safety locking requirements.
Safety Features: • Insulation distance greater than comparable products
Wiring Screw Size: M6
Connecting Wire Range: 16～35 mm²
Recommended Tightening Torque: 2.5 N·m
Electrical Life: Rated duty cycle 8 hours/intermittent cycle, operating frequency 30 times/hour. (Operating frequency ≤30 times/hour)
• AC-23 (Distribution/Resistive Load): ≥ 10,000 times
• AC-3 (Squirrel-cage Motor Load): ≥ 6,000 times
• Auxiliary Contacts (if present): ≥ 2,000 times
High Current Carrying Capacity: 100A rated current, meeting the power isolation requirements of medium to high power equipment.
Easy Installation: Panel mounting for easy integration and operation.
Strong Compatibility: Wide wiring range (16-35mm²) and M6 screws, compatible with mainstream cable specifications.
Normal Operating Conditions:
Ambient Temperature: -25°C to +40°C (24h average ≤ +35°C)
Altitude: ≤ 2000m
Relative Humidity: ≤ 50% at +40°C; up to 90% at +20°C (condensation prevention required)
2. Application Scenarios: This switch is specifically designed for manual isolation and switching of high-current three-phase four-wire circuits, especially suitable for applications with strict requirements on operational safety, maintenance standards, and electrical isolation integrity.
Main Power Switch and Maintenance Point for High-Power Equipment: Serves as the main power isolation switch for three-phase equipment such as high-power fans, central air conditioning units, large water pumps, and air compressors with a rated current not exceeding 100A.
