Rotary Limit Switch- 20.5:1 Series 55 Gear Ratio With 2 Contact Blocks Hubbell 55-4E-2SP-WR-20

Product Information

Specification

Also Known As :

They are commonly used for controlling machinery as part of a control system, acting as safety interlocks, or to count objects passing a point.

About :

The Hubbell 55-4E-2SP-WR-20, if a valid model, seems to be a particular type of limit switch with specified features, which is a type of switch operated by the motion of a machine part or the presence of an object.

Common Applications: :

• 55: Might refer to the series or model number.
• 4E: This could indicate a specific feature or variant within the series.
• 2SP: Might denote that there are 2 set points, or it could refer to some other feature like the type of contacts or mounting options.

Standards:

• WR: This often stands for "Water Resistant," indicating that the switch is designed to resist water ingress, making it suitable for certain outdoor or wet environments.
• 20: This could be another specific identifier, or perhaps it could refer to a rating or other specification. It's not clear without additional context.
• 20.5:1 Gear Ratio: Indicates the mechanical advantage offered by the gearing mechanism inside the limit switch, i.e., for every 20.5 rotations of the input shaft, the output shaft completes one rotation.
• 2 Contact Blocks: Indicates that the limit switch includes two separate contact blocks for electrical connections, which might be used for different functions or redundancies.

Construction :

• Consists of springs, levers, and other components that transfer the motion of the actuator to the contacts.
• Made of materials that offer durability and reliability over many operating cycles
• Options to mount the limit switch in place, which could include flanges, brackets, or holes for screws/bolts.
• These are the points where the switch connects to the electrical circuit. They can be screw terminals, quick connect terminals, or cable glands.

Specification :

• Width - 5-1/3 in 
• Depth - 5-1/3 in
• Height - 3-1/3 in 
• Gear Ratio - 20.5:1 
• Color - Gray 
• Support Type - Base Mount 
• Capacity - 15 Amps. 
• Material - Die-cast Aluminum 
• Number of Shelves - Each 
• Package Quantity - 1 
• Manufacturers Part Number - 55-4E-2SP-WR-20 5
• Normally Closed - 2 
• Normally Open - 2 
• Brand - Hubbell 
• NEMA Class - 4

Features :

• Industrial Machinery: To detect the presence or position of objects or parts.
• Safety Interlocks: To ensure that dangerous machinery is powered down when access doors are opened.
• Position Detection: In elevators, doors, gates, etc., to detect the open or closed position.
• Installation: The switches should be installed according to the manufacturer's specifications and guidelines, considering the environmental and operational conditions.
• Maintenance: Regular maintenance checks to ensure that the switch is operating effectively and safely. It may include cleaning, inspection, and testing.
• Voltage and Current: Indicates the maximum voltage and current that the switch is rated for. Exceeding these ratings can cause failure or unsafe conditions.