Description
Elevator limit switch LSE133-RLU1/U2 Brief Introduction
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Product Name |
Elevator limit switch |
| Model Number | LSE133-RLU1
LSE133-RLU2 LSE133-QLU3 LSE133-QLU4 |
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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 Limit Switch LSE133-RLU1/U2 – Nanjing Zhuye Elevatorparts
The elevator limit switch is a critical safety component that controls the elevator car’s upper and lower travel limits, preventing overtravel accidents caused by the car exceeding the allowable range. The Elevator Limit Switch LSE133-RLU1/U2 launched by Nanjing Zhuye Elevatorparts is a high-performance safety switch tailored for mainstream elevator systems, covering two models (RLU1 and RLU2) to adapt to different elevator stroke requirements. It is widely compatible with renowned elevator brands such as Schindler, OTIS, and KONE, suitable for both passenger and freight elevators. Crafted with high-strength engineering plastic shells, precision mechanical contacts, and corrosion-resistant components, this limit switch strictly complies with international elevator safety standards (EN 81-20, GB 7588-2003), making it a trusted choice for global elevator maintenance teams and manufacturers.
Nanjing Zhuye Elevatorparts adheres to the “quality first, safety-oriented” principle, implementing strict quality control throughout the production process of the LSE133-RLU1/U2 elevator limit switch. Each unit undergoes rigorous testing, including contact on-off reliability verification, mechanical durability assessment, corrosion resistance testing, and high-temperature resistance inspection. The switch adopts a snap-action contact design, ensuring fast and reliable triggering with a response time of less than 5ms, which can promptly cut off the elevator’s running circuit when the car reaches the limit position. The fully enclosed shell is dustproof, waterproof, and oilproof, with an IP rating of IP54, enabling stable operation in harsh environments such as elevator shafts with high humidity and dust (operating temperature range: -20℃ to 70℃). The internal wiring terminals are made of high-conductivity copper alloy, ensuring firm connections and low contact resistance.
Usage Guide for Elevator Limit Switch LSE133-RLU1/U2
Correct installation, debugging, and daily inspection of the LSE133-RLU1/U2 elevator limit switch are crucial to ensuring the elevator’s travel safety. Nanjing Zhuye Elevatorparts strongly recommends that only certified elevator maintenance technicians perform installation and maintenance, as improper operation may lead to switch failure, resulting in serious overtravel accidents.
1. Pre-Installation Preparation
First, confirm that the LSE133-RLU1/U2 model (RLU1 or RLU2) matches the elevator’s travel parameters and installation dimensions. Consult Nanjing Zhuye Elevatorparts’ technical team immediately if there is any uncertainty about compatibility. Then, cut off the elevator’s main power supply and control system power supply, lock the switch, and place a “Maintenance in Progress” warning sign at the elevator entrance and shaft access door. Fix the elevator car at a safe position (middle floor) to avoid accidental movement during installation. Finally, prepare professional tools including a screwdriver, wrench, torque wrench, multimeter, and feeler gauge, and clean the switch installation area (upper and lower limit positions of the shaft) to remove dust, debris, and oil stains.
2. Installation & Debugging
Remove the old limit switch from the shaft, and take photos to record the installation position, wiring direction, and terminal connections for future reference. Take the new LSE133-RLU1/U2 limit switch from Nanjing Zhuye Elevatorparts, install it on the dedicated bracket, and fix it firmly with screws (the torque should comply with Nanjing Zhuye’s specifications to avoid damaging the switch). Connect the switch’s wires to the corresponding terminals of the elevator control cabinet strictly according to the recorded photos and wiring manual—note that the limit switch is usually connected in series in the elevator safety circuit, so correct polarity and firm connection are critical. After installation, adjust the switch’s position: ensure the trigger lever aligns with the elevator car’s collision block, and the gap between them is 2-3mm (adjusted with a feeler gauge). Use a multimeter to test the switch’s on-off state (normally closed contacts should be on, normally open contacts off under static conditions). Switch on the power, enter the elevator’s inspection mode, and test the switch’s triggering performance: the elevator should stop immediately when the car touches the upper or lower limit switch, and the control system should report a corresponding fault.
3. Daily Use & Maintenance
According to the “Elevator Maintenance Rules” (TSG T5002-2017) and Nanjing Zhuye’s recommendations, the LSE133-RLU1/U2 limit switch should be inspected monthly and undergo professional comprehensive testing annually. For daily maintenance: Check the switch’s shell for cracks, deformation, or loose fixing screws; confirm the trigger lever is flexible without jamming. Regularly clean the switch surface and trigger mechanism with a dry cloth to remove dust and debris—avoid using oil or grease (it may cause jamming). Every 3 months, recheck the switch’s position and gap with the collision block, adjusting if there is any deviation; use a multimeter to test the contact on-off state. If the elevator reports an overtravel fault or the switch fails to trigger, stop using the elevator immediately and contact Nanjing Zhuye’s after-sales team for maintenance.
Replacement Cycle of Elevator Limit Switch LSE133-RLU1/U2
The replacement cycle of the LSE133-RLU1/U2 elevator limit switch is closely related to operating frequency and working environment. Under normal conditions (elevator daily operation 12-24 hours, dry and clean shaft environment, no frequent vibration), Nanjing Zhuye Elevatorparts recommends a replacement cycle of 3-5 years. This cycle is determined based on long-term field operation data and component aging tests, fully considering the wear of mechanical contacts, fatigue of the trigger lever, and attenuation of shell protection performance.
For elevators in high-traffic areas (e.g., large shopping malls, airports with frequent start-stop) or harsh environments (shaft with high humidity, heavy dust, large temperature fluctuations, or frequent vibration), the replacement cycle should be shortened to 2-3 years. High-frequency triggering accelerates the wear of contacts and trigger levers, while harsh environments cause corrosion of components and reduce the switch’s sensitivity. For low-usage elevators (e.g., villa elevators, small office buildings with daily operation time <8 hours) in stable environments, the cycle can be extended to 5-6 years, but only after inspection and confirmation by Nanjing Zhuye’s technicians that the switch’s triggering accuracy and contact performance meet safety standards.
Replace the LSE133-RLU1/U2 limit switch immediately if any of the following issues occur, regardless of its service life: The switch fails to trigger or triggers incorrectly during testing, leading to elevator overtravel; the contacts are severely oxidized, burned, or have poor contact (causing frequent safety circuit faults); the shell is severely cracked, deformed, or corroded, losing protective performance; the trigger lever is stuck or broken, unable to move flexibly; the switch’s wiring terminals are loose or damaged, posing electrical safety hazards.
The Elevator Limit Switch LSE133-RLU1/U2 from Nanjing Zhuye Elevatorparts integrates high reliability, durability, and strong compatibility, providing a critical safety guarantee for the elevator’s travel limit control. By following the correct usage, maintenance, and replacement guidelines, you can effectively prevent overtravel accidents, ensure the safe operation of the elevator, and protect the lives and property of passengers. Choosing Nanjing Zhuye Elevatorparts means you get 100% authentic LSE133-RLU1/U2 limit switches, as well as professional services including model matching, on-site installation guidance, and timely after-sales support. Trust Nanjing Zhuye Elevatorparts for the safe and stable operation of your elevator.
