Overview
This 29Elevator UKT Switch tracks mechanical positions in traction elevators, specifically functioning as a limit switch, speed governor, tensioner cutoff, or oil buffer safety mechanism.
Product Specification
|
Item |
Key Specification |
|
Electrical Contact Rating |
AC-15 220V / 4A; DC-13 110V / 0.3A |
|
Mechanical Operating Force |
11 N ±2 N |
|
Actuator Travel |
Total stroke 9 mm; minimum positive break travel 4.5 mm |
|
Ingress Protection |
IP67 (dust-tight and protected against water immersion up to 1 meter for 30 minutes) |
|
Operational Lifespan |
≥10,000,000 mechanical cycles; ≥500,000 electrical make-and-break cycles |
|
Ambient Temperature Range |
-30°C to +70°C |
Applications
Pit Buffer Monitoring: Interrupts the elevator safety circuit immediately during hydraulic oil buffer over-travel compression to prevent structural impact.
Speed Limiter Tension Wheels: Monitors governor rope tensioner pulleys to instantly trip the safety line upon detecting mechanical slack or counterweight cable failure.
Car Top Inspection Over-Travel: Limits vertical travel distance during inspection and maintenance procedures to protect technicians on the crosshead structure.
Hoistway Terminal Boundaries: Acts as the final electronic deceleration switch to stop the car or counterweight before mechanical buffer engagement.
Escalator Skirt Deflection Safety: Detects sidewall deformation inside commercial escalator trusses under structural loads to prevent passenger entrapment.
Manufacturing Capabilities
6 dedicated FANUC injection lines ensure housing dimensional tolerances within ±0.05 mm for consistent enclosure fit.
Automated Swiss micro-riveting of ≥99.9% Ag contacts controls contact resistance under 10 mΩ to prevent terminal overheating.
Baseline capacity of 150,000 completed safety switches per month to support high-volume OEM supply chains. Permanent inventory of 5,000 finished standard UKT switches combined with a rolling 60-day raw material supply (copper and PA66).
Every switch undergoes automated dielectric withstand and contact resistance testing, backed by MES batch-level traceability from raw PA66 polymer to final serial number.
Production lots undergo 2-meter concrete drop testing, with any micro-fractures immediately triggering factory FMEA isolation protocols.
Logistics
Logistics execution across FOB, CIF, and DDP via integrated freight forwarding networks.
Real-time dispatch notifications and cross-border shipping milestones sync directly into buyer ERP systems via API.
Standard orders up to 5,000 pieces are dispatched within 14 calendar days from payment clearance.
Customs Documentation: Pre-filed HS Code 8431310090, Country of Origin (CO) certificates, and MSDS documentation supplied as standard.
Packaging: Vacuum-sealed in 0.1mm anti-static poly-bags with active desiccants, packed in dual-wall corrugated cartons on ISPM-15 heat-treated pallets (ISTA-3A compliant).
Commercial Terms
Sample Orders: 5-piece testing batches provided at cost; EXW dispatch within 3 business days.
Minimum Order Quantity (MOQ): Fixed at 100 pieces per purchase order for standard production runs.
Tiered Pricing Structure: Volume discount thresholds established at 500 pcs, 2,000 pcs, and 5,000 pcs.
Standard Payment Terms: 30% deposit, 70% balance pre-shipment for initial accounts; Net-30 or Net-60 credit terms open to established clients based on a 12-month transaction history.
Multi-Currency Settlement: Contracts accepted in USD, EUR, and GBP.
Compliance & Certifications
EN 81 Certification: Type-examination certified by an EU Notified Body under European Lift Directive standards EN 81-20 and EN 81-50 for global elevator safety enforcement.
UKCA & CE Marking: Compliant with UK and EU statutory instruments, eliminating regulatory barriers for import, customs clearance, and installation across the UK and European markets.
Functional Safety (SIL 3): Certified to SIL 3 (Safety Integrity Level 3) according to IEC 61508, with a Probability of Failure on Demand (PFD) within the 10⁻⁴ to 10⁻³ range to meet global OEM safety system configurations.
Environmental Compliance: Compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006, qualifying the switch for immediate integration into standard factory audit workflows.
FAQ
Q: What is the expected service life under real elevator shaft conditions?
A: In continuous-duty traction elevator systems at 25–35°C with moderate humidity, the switch typically maintains stable performance for 7–10 years.
Q: What does 10,000,000 mechanical cycles mean in real elevator service?
A: In a busy commercial building with 500 door cycles per day, 10 million cycles translates to approximately 54 years of mechanical life. In high-traffic transit hubs running 2,000 cycles daily, rated mechanical life is reached after 13–14 years.
Q: How fast does the switch respond once mechanical travel is triggered?
A: Contact separation occurs within approximately 12–18 ms after reaching the positive break point.
Q: What happens if the actuator is jammed or partially blocked?
A: The internal mechanism forces a safe open-circuit state under any incomplete travel, rather than a partial contact condition.
Q: Can this switch operate reliably in high humidity or condensation?
A: In environments with intermittent condensation up to ~95% RH, the enclosure prevents conductive tracking across terminals. Long-term field data show no measurable drift in contact resistance under such conditions.
Q: How is failure handled in the event of wiring damage or internal wear?
A: The default failure state is open circuit, meaning the safety loop is interrupted immediately upon electrical discontinuity. The elevator cannot continue operation under unknown switch status.
Q: Is there measurable performance change after long-term cycling?
A: After approximately 500,000 electrical switching cycles, contact bounce time may increase slightly by 1–3 ms but remains within safety circuit tolerance.
Q: Can the switch withstand vibration and shock from emergency stops?
A: The internal mounting system tolerates repetitive vibration equivalent to emergency deceleration events. No contact rebound or unintended reclosure has been observed under simulated 2G–3G transient shock conditions.
Q: What is the recommended maintenance or inspection interval?
A: Visual inspection every 12 months is sufficient in standard commercial buildings. In high-traffic elevators, a 6-month electrical continuity check is recommended to detect early wiring fatigue rather than internal switch degradation.
Q: What is the practical value of SIL 3 certification for procurement teams?
A: SIL 3 is the highest functional safety rating required by EN 81-20 for elevator safety circuits, meaning dangerous failure probability is below 1 in 10,000 per demand.
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