Elevator Auxiliary Contactor Elevator AC Contactor Elevator Accessories Auxiliary Contact Block SZ-A31

Contact Expansion: A 3NO+1NC configuration compensates for insufficient auxiliary contacts in the main contactor, adapting to PLC/relay control and signal circuit expansion.

Signal Feedback: NO contacts are used for operating status, door position, and brake feedback; NC contacts are used for fault, phase loss, and overload warnings, facilitating remote monitoring and fault location.

Logic Interlocking: Implements forward/reverse rotation/star-delta circuit interlocking to prevent phase-to-phase short circuits, improving system safety and reliability.

Linkage Control: Integrates with thermal relays and time relays, extending functions to include delay, overload protection, and sequential start/stop, adapting to complex control requirements of elevator door operators, fans, etc.

Status Indication: Drive indicator lights, buzzers, etc., intuitively display equipment operating/fault status, simplifying on-site maintenance.

Xi’an Sulab Machinery Co., Ltd is committed to providing our customers with the highest quality elevator and escalator parts in the most timely and professional manner. The main brands are Otis, KONE, Sigma, Hyundai, , etc. There are also elevator and escalator spare parts of Chinese brands such as Canny, BLT and IFE. We also do OEM of escalators and moving walks, as well as modernization of elevators.

Our basic premise in building our business is to help our customers meet their requirements by providing exceptional customer service, competitive prices and quality OEM parts. We provide our valued customers with elevators and escalators with the best quality and competitive prices.

At the same time we also focus on modernizing our customers, but this is probably the best solution for those old elevator maintenance today. This not only solves high-value routine maintenance issues, but also extends the life of the elevator. Customers are our greatest asset, and we promise to all our customers that we will act with fairness, integrity and respect for everyone. We encourage and advocate innovation and creativity to serve every customer better than any competitor with value-for-money products and services. So far, we have successfully sold many elevator products to North America, South America, Middle East, Southeast Asia, Africa, Europe and other countries.

Xi'an Sulab Machinery Co., Ltd. uses excellent labels and packaging labels when delivering goods; carton boxes for light items; fumigation-free wooden boxes for heavy items; according to the urgency of customer needs and cost needs, using the most suitable delivery way to ship the parts. After delivery, write customers of the courier number and the latest logistics status in timely. When the goods nearly arrive at the destination place, remind the customer to contact the local express company or forwarder to make the custom clearance, so as to obtain the goods as soon as possible. We pay much attention to the order details. Before delivery, we will check and confirm the product information and pictures with the customer, after customer approval, then arrange the delivery.

Professional service,high quality parts and products,quick delivery, reasonable price,no after-care purchasing experience. No matter where you are,we will work with you to create a better future together.

Welcome to know more about us and look forward to cooperating with you.