An over-speed switch is a safety device used to monitor and control the rotational speed of machinery, such as turbines, engines, compressors, and motors. It triggers an alarm or shutdown if the speed exceeds a preset limit to prevent mechanical damage or hazardous conditions.
APPLICATION
Gas & steam turbines
Diesel/gas engines
Power generation systems
Industrial fans & pumps
Rotating machinery in manufacturing
KEY BENEFITS OF PRODUCT
1-Speed Sensing Mechanism
2-Adjustable Set-point
3-Instantaneous or Time-Delayed Response
4-Fail-Safe Operation
5-Output Contacts
6-Self-Diagnostics & Monitoring
7-Robust Construction
8-Manual Reset Function
BAISC PARAMETER
LY1 Series Over-Speed Switch with Manual Reset
The LY1 series over-speed switch is designed for auxiliary circuits with AC 50Hz, 380V or DC 220V. It limits the maximum rotational speed of motors, ensures rapid circuit disconnection, and guarantees safe operation.
Primary Application: Over-speed protection in the hoisting mechanism descent of cranes.
Suitable for other applications requiring similar over-speed protection.
Normal Operating Conditions：
Ambient Temperature: −5°C to +40°C. Average Temperature should be less or equal to +35°C within 24 hours. (Special Note: For temperatures below −5°C or above +40°C, specify requirements during ordering.)
Altitude: Installation site elevation ≤ 2000m.
Humidity: Relative humidity ≤ 50% at +40°C. Higher humidity is permissible at lower temperatures (e.g., 90% at 20°C). Condensation due to temperature fluctuations must be considered.
Environment: Free from excessive shock, vibration, or swaying.
Installation Category: Class II.
Pollution Degree: Level 3.
Ingress Protection (IP) Rating: IP42 (Protected against solid objects >1mm and dripping water).
LY1 Series Auto-Reset Over-Speed Switch
The LY1 series auto-reset over-speed switch is designed for auxiliary circuits with AC 50Hz, 380V or DC 220V. It limits the maximum motor speed, ensures rapid circuit disconnection, and maintains safe operation.
Primary Applications: Over-speed protection in crane hoisting mechanisms during descent.
Suitable for other applications requiring similar over-speed protection.
Standard Operating Conditions
Ambient Temperature Range: −5°C to +40°C. Average Temperature must not exceed +35°C. (Note: For environments below −5°C or above +40°C, special order requirements must be specified.)
Altitude Limit: Maximum installation altitude: 2,000 meters.
Humidity Conditions: Relative Humidity: ≤50% at +40°C.
Higher humidity allowed at lower temperatures (e.g., 90% at 20°C).
Condensation Risk: Must account for temperature-induced moisture buildup.
Environmental Stability: Must be installed in areas free from excessive shock, vibration, or swaying.
Installation Category: Class II.
Pollution Degree: Level 3.
Ingress Protection (IP) Rating: IP42 (Protection against solid objects >1mm and dripping water).
TDS Series Over-speed Switch Technical Specifications
The TDS series over-speed switch is a compact, high-precision protection component featuring wide rotational speed range and strong anti-interference capability. Primarily used in motors or rotating mechanisms to limit maximum rotational speed, it ensures operational safety by rapidly disconnecting auxiliary circuits.
Standard Operating Conditions
Ambient Temperature: Operating range: -5℃ to +40℃. 24-hour average temperature shall not exceed +35℃.
Special orders required for temperatures below -5℃or above +40℃.
Altitude: Maximum installation altitude: 2,000 meters above sea level.
Humidity: Relative humidity ≤50% at +40℃. Higher humidity permitted at lower temperatures (e.g., 90% at 20℃). Condensation due to temperature variations must be considered.
Environmental Conditions: Installation site must be free from excessive vibration, shock or swaying.
Installation Category: Class II
Pollution Degree: Level 3
Ingress Protection Rating: IP42 (Protected against solid objects >1mm and dripping water)
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