Description

Introduction to Elevator Limit Switch LSE133-QFU1
Manufactured by NANJING ZHUYE ELEVATOR PARTS

The LSE133-QFU1 is a heavy-duty, safety-certified limit switch engineered for elevator over-travel, door position and counter-weight monitoring. Designed and mass-produced by NANJING ZHUYE ELEVATOR PARTS, it meets EN 81-20/50, ASME A17.1 and GB 7588, and is CE, UL, CCC and TÜV marked for global projects.

1. Technical Specifications
• Housing: die-cast zinc alloy, 2 mm wall, IP67 / IK08
• Dimensions: 66 × 42 × 32 mm (body), 134 mm total height with roller lever
• Contact Form: 1 NC + 1 NO, positive-opening, snap-action
• Rated Voltage / Current: 250 V AC 10 A (AC-15), 30 V DC 6 A (DC-13)
• Contact Material: silver-nickel 90/10 with gold flash, < 30 mΩ contact resistance
• Insulation Voltage: 1 000 V AC, 4 kV impulse withstand
• Mechanical Life: ≥ 10 million operations at 6 000 op/h
• Operating Force: ≤ 12 N (pre-travel 1.5 mm), over-travel 4 mm minimum
• Cable: 3 m PVC 22 AWG, 3-core, colour-coded; PUR or silicon options on request
• Temperature Range: –30 °C … +85 °C, 95 % RH non-condensing
• Protection Class: IP67 (dust-tight and temporary immersion), salt-spray 500 h per ASTM B117

2. Safety & Reliability Features
• Positive-opening NC contact guarantees break distance ≥ 0.5 mm even if contacts weld, satisfying SIL 2 / PL c.
• Dual-spring snap-action mechanism prevents slow-make/slow-break faults.
• Self-lifting terminal screws with captive washers ensure vibration-proof connection (tested 10 g RMS, 2 h).
• UV-stabilised housing and nitrile roller withstand hoist-way temperature cycles and cleaning chemicals.

3. Actuator Options
Standard roller lever, top-push plunger, side-push roller, or custom zinc-plated steel levers; all field-replaceable in < 30 s without tools.

4. Installation & Compatibility
Universal 30 × 60 mm mounting footprint matches OTIS, KONE, Schindler, Thyssen, Mitsubishi and most domestic controllers; pre-wired flying leads cut on-site labour by 40 %. Optional M12 quick-connect or Deutsch 3-pin connectors available.

5. Application Examples
• Upper / lower final limit and over-travel protection for car and counter-weight
• Door close/open confirmation on centre-parting or side-opening doors
• Buffer engagement detection in pit
• Hoist-way access hatch interlock

6. Performance Validation
Every LSE133-QFU1 undergoes 100 % function test at 250 V AC, insulation and 4 kV impulse test, plus 2 000 V DC contact resistance measurement; MTBF > 2 million cycles per MIL-HDBK-217F.

7. Environmental & Sustainability Credentials
RoHS 2.0, REACH and halogen-free compliant; 100 % recyclable zinc alloy housing; produced in NANJING ZHUYE ELEVATOR PARTS’ energy-monitored, waste-recycling facility certified to ISO 14001.

8. After-Sales Support
NANJING ZHUYE ELEVATOR PARTS provides a 3-year global warranty, 24-hour technical hotline, next-day spare-part dispatch worldwide, and free on-site commissioning support. Custom cable lengths, actuator shapes, or gold-plated contacts can be supplied within 7 working days.

Conclusion
Specifying the LSE133-QFU1 limit switch from NANJING ZHUYE ELEVATOR PARTS delivers code-compliant safety, ten-million-cycle reliability, and universal mounting flexibility—reducing maintenance costs and maximising passenger safety in every vertical-transportation project.