ZHUCO SZW26-32/D202.2YS 1-0-2 Three-position two-section changeover switch with electronic lock

SZW26-32/D202.2YS Changeover Switch
1. Product Overview
This product is a three-position (1-0-2) double-section (two-layer) rotary changeover switch, featuring an integrated electronic locking mechanism. Locking/unlocking is performed using a dedicated key, effectively preventing unauthorized or accidental operation and ensuring equipment and personnel safety. Its locking function is flexible; in addition to the standard middle "0" (OFF) position where the key can be removed for locking, it can be customized to lock in any position (such as "1" or "2") to meet specific safety logic or process requirements.
2. Electrical Parameters
Rated Voltage: AC 440V (50/60Hz); DC 240V
Rated Current: 32A
Contact Configuration: Two independent double-throw switching circuits (8 terminals in total).
Position I: Contacts 1-2 connected, 5-6 connected.
Position 0 (OFF): All contacts disconnected (standard lockable position, key can be removed).
Position II: Contacts 3-4 connected, 7-8 connected.
3. Safety and Locking Features
Locking Method: Key-operated electronic lock.
Locking Logic: Factory default allows key removal and locking in the middle "0" position (OFF). Customization is supported to allow locking in either the "1" or "2" working position; the key can only be removed in the locked position.
Safety Purpose: Prevents unauthorized operation, enables access control, and ensures safety during maintenance, commissioning, or specific operating modes.
4. Structure and Materials
Contacts: Silver alloy material, ensuring low contact resistance and high electrical life.
Conductors: Thickened copper components to meet the 32A current carrying requirements.
Insulation and Housing: Flame-retardant, high-temperature resistant, environmentally friendly engineering plastic, providing reliable mechanical strength and insulation performance.
Operating Mechanism: Clear position indication, combined with the electronic lock mechanism, provides a clear and reliable operating feel. 5. Environmental Conditions
Ambient temperature: -25°C to +40°C (average temperature over 24 hours ≤ +35°C)
Altitude: ≤ 2000 meters
Relative humidity: ≤ 50% at +40°C; up to 90% at +20°C. Protection against possible condensation is required.
6. Mechanical and Electrical Life
Mechanical life: ≥ 100,000 cycles
Electrical life: ≥ 30,000 cycles (at rated load)
Operating frequency: Recommended ≤ 120 cycles/hour
7. Typical Application Scenarios
This switch is specifically designed for critical electrical control circuits requiring strict control over operating permissions and prevention of accidental operation.
Safety isolation and maintenance lockout: Used as an authorized disconnection point for safety lockout (LOTO) during equipment maintenance, locked in the "0" position.
Permission control mode selection: Used in equipment requiring differentiation of operating permissions, for example: locking the "1" position (local manual) for maintenance personnel and the "2" position (remote automatic) for normal operation.
Critical equipment control: Applied in situations where arbitrary switching of states is not allowed, such as fire pump power selection, backup power switching, and mode switching of important production equipment.