100w - 120w Elevator Electrical Parts Elevator Bistable Switch Sn-kcb_r-iii Series

An elevator bistable switch is a critical control component in elevator systems, designed to maintain stable electrical contact in either of two distinct positions (open or closed) without continuous power input. This latching mechanism ensures reliable operation of elevator doors, floor selection, or safety circuits by remaining in its last set state until deliberately changed.

Typically constructed with durable materials like silver alloy contacts and high-grade insulation, bistable switches feature a mechanical or magnetic actuation system. Their snap-action design provides positive contact engagement, preventing arcing and reducing contact wear. Common applications include door zone detection, car position verification, and emergency stop circuits, where maintaining state during power fluctuations is crucial.

The switch's hysteresis characteristic prevents chatter during vibration, while its low-power consumption makes it ideal for safety-critical circuits. Modern variants incorporate sealed designs for dust resistance and may integrate with electronic control systems through auxiliary contacts. Compliance with elevator safety standards (EN 81-20, ASME A17.1) ensures fail-safe operation—for instance, forcing a closed-circuit state if door sensors detect obstructions.

Bistable switches contribute to elevator reliability by eliminating the need for constant energization, reducing heat generation and energy use. Their robust design supports millions of cycles, making them indispensable for maintaining operational integrity in both traction and hydraulic elevator systems.

Product Shape

P/N:SN-KCB_R-IIIA/B C cable outlet in the left.
Application in elevator car level for position sensing.
Power:100~120W,voltage:250VAC/DC,current:3.0A;shock-resistance:50G
Testing distance:5mm~15mm;
Bi-stable door switch is with dustproof and explosion-proofplastic case,foreign-made reed switch with orginal package,high life;
Actuating magnet choice depends on actual environment conditions.

FAQ
1. Are the elevator wire ropes durable?
The elevator wire rope has special provisions and requirements. Configuration is not only for wire rope and rated load, but also considered the size of the traction, as a result, the tensile strength of wire rope is greater than the weight of the lift. The safety factor is equipped with more than four wire rope. So it won’t break at the same time.
2. Is it dangerous for power failure suddenly during the elevator running?
If it occurs, the elevator will automatically stop due to the electrical and mechanical safety device. In case of power failure,elevator brakes will automatically taken. In addition, the power supply departments such as planned outage, prior notice are also operating.
3. Will us be hurt when it closed suddenly?
In the closing process, if people touch the hall door, the door of elevator will automatically restart without any danger. With anti clamping switch, once the gate touched, this switching action make the elevator unable to be closed and even reopened. In addition, closing force is also available here.
4. How the elevator running?
Elevators are operated with a counterweight wire rope through the (tractor) traction drive, making ups and downs on the guide rail.
5. Is the escalator installation complicated?
We believe the functions of an escalator are not necessarily proportional to the operation complexity. Therefore, escalators designed by us apply an integrated structure, so that the equipment is more precise and more efficient and allows easier and more convenient commissioning.
6. Do you have any cerifications?
Yes, we do with ISO9001 / CCC / CE Certificates for u.

SUNNY Elevator is always engaged in researching into, developing, manufacturing various building traffic and transport systems such as elevator, escalator, moving walk etc. Through the centurial trials and hardships, SUNNY Elevator never changes its advanced technology.

SUNNY Elevators safely operate in all kinds of high grade buildings in over 100 countries and regions. As time flies, it continues the rigorous and conscientious spirits of the German nation. SUNNY Elevator popular-fixes the most superb elevators and escalators all aver the world and opens the gate of the artistic elevator palace.

As a distinguished figure in the contemporary elevator industry, SUNNY Elevator witnesses the past and strides forwards a bright future. It connects classical German art with the advanced modern technology. It links the western european buildings with the eastern chinese style buildings.

From now on, space talks to light, aesthetics combines with high tech. Grace integrates with comfortable operation. It wholeheartedly creates a smooth urban sight line. It starts a big vision of SUNNY brand.

As a professional “one-stop” elevator and escalator solution plan supplier, Shanghai SUNNY elevator Co.,Ltd. intergrates the elevator research, development, design, manufacture, sales, installation, repair, maintenance, transformation into one.

SUNNY Elevator is located in the most economically prosperous Changjiang River Delta Economic Zone(Jiading District, Shanghai, China). It owns 20,000 square meters of modern factory zones in Jiangqiao Industrial Zone, Jiading District, Shanghai, China. Total investment is 50 million RMB. It builds up 80m high elevator test tower, 7 elevator test wells. It can annually produce 5,000 sets of various elevators and escalators.

SUNNY Elevator inherits the outstanding German manufacture technology. It introuces the advanced internation manufacture installations, combines with pioneer German elevator design concept. The first-class R&D, design, production, site service groups bring about the secure, reliable, outstanding elevators and escalators for vast clients.

SUNNY Elevators accord with GB7588-2003 and European En81 standards. It passes ISO9001 Internation Quality System Certification. In normal production process, the strict and comprehensive product inspection and testing system ensures the superior elevators and escalators with excellent operation.

SUNNY Elevator provides modern cities with the international product standards and operation experiences by the superior services. With the vigorous support of advanced management and invovative technology, it integrates with the advantageous resources to enhance its strength. It leads the elevator industry. It offers you the extraordinary German experience. This is also the unchanged pursuit of SUNNY Elevator.