Description
Elevator travel limit switch LHP035053A49 Brief Introduction
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Product Name |
Elevator travel limit switch |
| Model Number | LHP035053A49 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Elevator Travel Limit Switch LHP035053A49: Critical Safety Component from Nanjing Zhuye Elevatorparts
The elevator travel limit switch is a vital safety component that prevents the elevator car from overtraveling beyond the top or bottom floors, directly safeguarding the safety of passengers and equipment. A reliable limit switch is non-negotiable for complying with elevator safety regulations. The Elevator Travel Limit Switch LHP035053A49, exclusively supplied by Nanjing Zhuye Elevatorparts, is engineered for modern elevator systems. Compliant with international standards including IEC/EN 60947-5-1 and GB 14048.5, this normally closed (NC) limit switch features high-precision triggering and durable mechanical structure, making it compatible with mainstream elevator brands such as Schindler, OTIS, KONE, and domestic brands like Mitsubishi. It is designed to accurately detect the car’s extreme positions and cut off the running signal in time, ensuring the elevator stops stably at the designated limit.
Nanjing Zhuye Elevatorparts adheres to a stringent quality control system, and the LHP035053A49 elevator travel limit switch is a testament to this commitment. Each unit undergoes comprehensive testing, including triggering accuracy verification, mechanical durability trials, waterproof and dustproof tests, and high-temperature operation assessments. The switch features a zinc alloy shell with IP65 protection rating, effectively resisting dust, water splashes, and corrosion in elevator shafts. Its internal contact is made of silver alloy, minimizing ablation and ensuring stable electrical connection even after 1 million+ mechanical operations. The operating temperature range of -30℃ to 70℃ enables reliable performance in harsh elevator shaft environments, while the built-in anti-vibration structure prevents false triggering caused by elevator operation.
Usage Guide for Elevator Travel Limit Switch LHP035053A49
Proper installation, calibration, and maintenance are crucial to maximizing the safety performance and lifespan of the LHP035053A49 limit switch. Nanjing Zhuye Elevatorparts strongly recommends that only certified elevator maintenance technicians perform these procedures to avoid safety hazards. Before installation, verify that the switch’s triggering type, contact configuration, and installation dimensions match the elevator system’s specifications. Refer to the product manual provided by Nanjing Zhuye Elevatorparts for detailed installation diagrams and calibration guidelines, or consult our technical team for model-specific support.
1. Pre-Installation Preparation
Begin by cutting off the elevator’s main power supply and control system power, then lock the power switch and place a “Maintenance in Progress” warning sign at the machine room and elevator entrances to prevent accidental activation. Prepare essential tools: a torque wrench, screwdriver, multimeter, level, and wire stripper. Clean the installation area (top and bottom of the elevator shaft, near the guide rail) to remove dust, debris, and oil stains—contaminants can affect the switch’s triggering accuracy. Inspect the LHP035053A49 limit switch for any external damage, loose components, or stuck moving parts; test the contact on-off status with a multimeter to ensure it is in the normal closed state (NC) before installation.
2. Installation & Wiring
Install the LHP035053A49 limit switch on the dedicated bracket at the top and bottom limit positions of the elevator shaft, ensuring the switch’s roller is aligned with the trigger plate on the elevator car. Use a level to adjust the switch to be horizontal and vertical, with the roller and trigger plate maintaining a gap of 2-3mm (as specified in Nanjing Zhuye’s manual). Secure the switch with high-strength bolts, tightening them to the recommended torque (M6 bolts: 8 Nm) to avoid loosening due to elevator vibration. Follow the wiring diagram strictly: connect the switch’s two signal wires to the elevator main controller’s limit signal interface, ensuring correct polarity (refer to the color-coding in the manual). Use shielded wires to reduce electromagnetic interference, with a wire stripping length of 6-8mm. After wiring, insulate the connection points with waterproof tape to prevent short circuits caused by moisture in the shaft.
3. Debugging & Daily Operation
After installation, conduct comprehensive debugging. Restore power and operate the elevator in inspection mode to slowly move the car to the top and bottom limit positions. Verify that the LHP035053A49 switch is triggered accurately when the car reaches the limit, and the elevator immediately stops running without overtravel. Use a multimeter to check the contact status during triggering—ensure the normally closed (NC) contact opens reliably to cut off the signal. Repeat the test 3-5 times to confirm stability. During daily operation, incorporate the switch into weekly maintenance per TSG T7001-2023 standards. Regularly clean the switch’s surface and roller to remove dust and debris; check for loose fasteners, damaged wires, and abnormal wear on the roller. Test the triggering sensitivity monthly to ensure it meets safety requirements.
Replacement Cycle of Elevator Travel Limit Switch LHP035053A49
The replacement cycle of the LHP035053A49 elevator travel limit switch depends on operating frequency, working environment, and maintenance conditions. Under normal parameters—elevator runs 12-24 hours daily, switch triggering ≤500 times/day, and the elevator shaft is dry and well-ventilated—Nanjing Zhuye Elevatorparts recommends a replacement cycle of 4-6 years. This timeline is based on long-term field data, accounting for mechanical component wear (roller, spring), contact ablation, and shell corrosion, which are key factors affecting triggering accuracy.
For elevators in high-traffic areas (e.g., shopping malls, airports) with frequent limit triggering or harsh environments (high humidity, heavy dust, frequent temperature fluctuations, or corrosive substances in the shaft), the replacement cycle should be shortened to 2-4 years. High-frequency mechanical contact accelerates component wear, while harsh conditions increase the risk of corrosion and short circuits. For low-usage elevators (e.g., villa elevators, daily operation <8 hours) in stable environments, the cycle can be extended to 6-8 years. However, semi-annual professional inspections by Nanjing Zhuye’s technicians are mandatory to confirm triggering accuracy, contact status, and shell integrity, in line with elevator regular inspection standards.
Immediately replace the LHP035053A49 limit switch if any of the following issues occur, regardless of service life: inaccurate triggering (elevator overtravels or stops prematurely); contact jamming or poor contact leading to failure to cut off the signal; obvious physical damage (cracked shell, damaged roller, broken spring); corrosion on the shell or terminals affecting performance; abnormal noise during triggering; or the switch fails semi-annual/annual safety inspections. Timely replacement is critical, as a faulty limit switch is a major safety hazard that can lead to elevator collisions or other serious accidents.
The Elevator Travel Limit Switch LHP035053A49 from Nanjing Zhuye Elevatorparts integrates precise triggering, durable design, and reliable safety performance, providing a critical safety barrier for elevator systems. Its strict quality control and compliance with international standards make it a trusted choice for elevator maintenance professionals worldwide. By following the recommended usage guidelines and replacement cycles, you can significantly reduce safety risks and ensure compliance with elevator safety regulations. Nanjing Zhuye Elevatorparts provides 100% authentic LHP035053A49 limit switches, along with professional support including model matching, on-site calibration guidance, and timely after-sales service. Choose Nanjing Zhuye Elevatorparts for reliable and safe elevator component solutions.
