PULL CORD SWITCH / SAFETY CABLE PULL SWITCH

Pull Cord Switch / Safety Cable Pull Switch Manufacturers and Suppliers

Features:

Universal (common) Cast Aluminium/ DMC enclosure.
Same overall and general mounting dimensions and hence reduction in variety of mounting brackets.
Rationalized design and construction allows inter changeability of parts.
Special rubber seal (0 ring) on shaft for better protection against ingress of dust, dirt etc.
Special Ring & Overlap Fitting to prevent ingress of dust & water.

Standard Features :

Enclosure : Weatherproof, field mounding type, IP65 Cast Al/ Cast Iron, epoxy painted, colour light gray
Colour : Epoxy painted, light gray,Yellow or as per request
DMC (FRP) enclosure for use in corrosive environment.
Special flame proof enclosure for use in hazardous area, Group lla, llb, llc
Output Contacts : 1NO + 1NC / 2NO + 2 NC
Contact Rating for standard models : 16Amp resistive at 440 VAC
Contact Rating for models with reed switch contact: 30VA, 24 VDC/ 230V AC, 1 Amp. (please specify your control voltage)
Standard Operating Position : 1 – 0
Reset : Pull Cord Switch : Manual Reset Type
Belt Sway Switch: Auto Reset Type

Optional Accessories / Function :

Separate junction Box for termination of cables
Indicating lamp : long life led indicating lamp for indication of operated pull cord switch
Mechanical flag indication for pull cord switch
Separate reset lever
Mounting Bracket
Operating Position 1 – 0 – 1
Communication card (For Trip Indicator)
Hermetically sealed reed contacts for use in extremely dusty and corrosive conditions

Application :

Pull cord switch also known as Rope Operated Emergency switch is used as a safety switch to stop the conveyor belt in case of an emergency. It is also known as pull switch cord.

Construction :

As These switches are used as safety or emergency switch, It is not operated very frequently, therefore, construction of these switches is such that it should be operated immediately though it kept idle for a long time. Pull cord switch is housed in dust and weatherproof enclosure with IP65 grade of protection. Sturdy and heavy-duty cam-Switch with robust contacts is used to give longer service life. Operating handle fitted with spring steel rings at both ends for fixing the rope. The design of the rings gives maximum flexibility in operating condition. The enclosure is epoxy painted to give high corrosion resistance. The switch is designed with manual reset type of mechanism.

Operation :

Pull cord switch is mounted on the walkway side of the conveyor belt, preferably at about every 20-25 meters. When the rope is pulled from any side. The switch get operated. Unless and until the handle is reset to normal position manually, the switch remains in operating condition. Pull Rope switch All the Pull Cord Switches installed along an individual belt are electrically wired in series and connected to the control station by a two core cable. Therefore actuation of any one of these Pull Cord Switches will stop the concerned conveyor until the particular switch is manually reset.

Pull Cord Wire / Rope and Typing Accessories :

Pull cord wire, Dia. Aprox. 5 – 6 mm, 6 x 7 construction, galvanized steel wire with PVC cover. Specially extruded for material handling industry. Tying clips, Cable Guide, Eye Bolt, Tension Spring, Cable Gland for tying pull cord cable to individual switch are also supplied at extra cost.

Frequently asked questions

PULL CORD SWITCH

1] How far apart are emergency stop button on a conveyor?

ANS: Pull cord switch should be placed at every 25 Mtr on both side of conveyor, with necessary supports to rope. These supports are either of I bolt or Cable carrier at turning or change in level of the conveyor.

2] How does an emergency Pull cord switch work?

ANS: Pull cord switch is mounted on the walkway side of the conveyor, Pull cord rope is attached to operating lever in such a way that it can be operated from both side. Typical Arrangement is shown in the below diagram. Various accessories are required for its proper function depending on-site condition.

3] How are Pull cord switch Wired?

ANS: Safe way of wire Pull cord switch is through NC contact. All Pull cord `s NC contact is connected in a series further interlock to turn OFF the Conveyor ( Motor)

A pull cord switch, also known as a pull switch or a pull chain switch, is a type of electrical switch that is activated by pulling on a cord or chain. It is commonly used to control lighting fixtures, ceiling fans, and other electrical devices in both residential and commercial settings. The basic principle behind a pull cord switch is that when the cord or chain is pulled, it activates a mechanism inside the switch that either completes or interrupts the electrical circuit, thereby turning the connected device on or off.

Key points about pull cord switches:

Activation Mechanism: Pull cord switches consist of an internal mechanism that responds to the pulling action. When the cord or chain is pulled, it engages a set of contacts within the switch, causing a change in the electrical state.

On-Off Control: The primary function of a pull cord switch is to provide a convenient way to turn a device on or off without the need for direct physical contact with the switch itself. This is particularly useful for ceiling-mounted fixtures like lights and fans.

Applications: Pull cord switches are commonly found in places where wall-mounted switches might not be practical, such as in attics, basements, utility rooms, and some outdoor areas. They are often used in bathrooms for controlling exhaust fans and light fixtures as well.

Design and Variations: Pull cord switches come in various designs. They may have a single cord for simple on-off control or multiple cords/chains for controlling different functions or devices independently. Some switches even have pull cords that can be extended or shortened for specific adjustments.

Safety Considerations: As with any electrical device, safety is important when using pull cord switches. Ensuring that the cords and chains are in good condition and properly maintained can help prevent accidents.

Maintenance: Over time, the cords or chains of pull switches can wear out or break. Regular inspection and maintenance are recommended to ensure the switch remains functional and safe to use.

Installation: Pull cord switches are typically installed by mounting them to a surface and connecting them to the electrical wiring of the device they control. Installation procedures may vary depending on the specific type and manufacturer.

In summary, a pull cord switch is an electrical switch that operates through the action of pulling on a cord or chain. It provides a convenient way to control various electrical devices, particularly those mounted on ceilings or in hard-to-reach areas.

Sales Area :

Pull Cord Switch, Cord Pull Switch, Rope Pull Switch Manufacturers, Suppliers, Exporters & Distributors in India

Safety Switch

Proximity Switch

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