Elevator Traveling Cable TVVBG30*0.75mm: Stable Transmission Core from Nanjing Zhuye Elevatorparts

Step-by-Step Usage Guide for Elevator Traveling Cable TVVBG30*0.75mm

1. Professional Installation & Commissioning

• Safety Preparation: Cut off the elevator’s main power supply and hang a “Maintenance in Progress—Do Not Power On” sign at the power switch. Fix the elevator car to a safe position using a safety clamp to prevent accidental movement. Clean the cable trough in the shaft and the cable fixing positions on the car and control cabinet to remove dust and debris.
• Cable Routing & Fixing: Route the TVVBG30*0.75mm cable along the dedicated cable trough in the shaft, ensuring no twisting, kinking, or overlapping. Fix the cable at intervals of 1–1.5 meters using corrosion-resistant cable ties provided by Nanjing Zhuye Elevatorparts. Pay special attention to the bending part (cable chain) at the top of the car—ensure the bending radius is not less than 8 times the cable diameter to avoid core breakage due to excessive bending.
• Wiring & Connection: Strip the cable sheath and insulation layer according to the required length (avoid damaging the conductors). Follow the elevator wiring diagram and Nanjing Zhuye’s technical guidance to connect the 30 cores to the corresponding terminals of the car electrical box and control cabinet respectively. Mark each core clearly to avoid wrong connection. For shielded variants, properly ground the shield layer to enhance anti-interference performance. Ensure all connections are tight and use insulating tape to protect the joints.
• Post-Installation Testing: Remove the safety clamp and restore the elevator power supply. Operate the elevator to run up and down the entire stroke, and check if the car’s electrical devices (lighting, fan, door system) operate normally. Use a professional signal tester to detect the cable’s transmission stability and a multimeter to measure the conductor resistance (normal value ≤ 2.8Ω/km). If there is signal interruption, device failure, or abnormal resistance, recheck the wiring and routing immediately.

2. Daily Operation & Routine Inspection

• Daily Visual Inspection: During shaft patrols, check the external state of the TVVBG30*0.75mm cable. Ensure the outer sheath is free of cracks, wear, bulges, or oil stains; check the cable ties for looseness or falling off; focus on inspecting the bending part and the area in contact with the guide rail for wear or deformation.
• Weekly Functional Check: Operate the elevator to run at different speeds and test the functions of the car’s electrical devices. If there are phenomena such as flickering lights, unresponsive door control, or intermittent intercom, it may be caused by poor contact or signal transmission failure of the traveling cable, and the cable needs to be inspected immediately.
• Monthly Parameter Monitoring: Cut off the power supply, use a megohmmeter to detect the insulation resistance between the cable cores and between the cores and the ground (normal value ≥ 100MΩ). If the insulation resistance is too low, it indicates insulation damage, and corresponding maintenance or replacement measures should be taken.

3. Regular Maintenance Schedule

• Quarterly Maintenance: Clean the cable surface and cable trough with a dry, lint-free cloth to remove accumulated dust and debris. Check the cable’s connection terminals for looseness or oxidation, retighten loose terminals, and clean oxidized terminals with a professional cleaner. Apply a small amount of anti-rust oil to the metal fixing parts to prevent corrosion.
• Semi-Annual Performance Test: Conduct a comprehensive performance test, including flexural performance inspection and signal transmission stability test. Simulate the elevator’s up and down operation to check if the cable bends smoothly without jamming. Use a signal analyzer to detect the cable’s signal attenuation, ensuring it is within the standard range. For elevators in harsh environments, increase the inspection frequency.
• Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Conduct a full-length inspection of the cable, use professional equipment to detect internal core breakage or insulation damage, and replace aging or severely worn cable ties and fixing parts. For cables used for a long time, conduct a comprehensive performance evaluation to determine whether they need to be replaced in advance.

Recommended Replacement Cycle for Elevator Traveling Cable TVVBG30*0.75mm

1. Standard Replacement Cycle

2. Adjustments for Special Scenarios

• Harsh Environments: For elevators in high-humidity coastal areas, high-dust construction sites, elevators with frequent high-speed operation (more than 120 times per hour), or shafts with oil leakage, the replacement cycle should be shortened to 3–4 years. Harsh conditions accelerate sheath wear, insulation aging, and core breakage, significantly reducing the cable’s reliability.
• Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with monthly rides < 3,000) and clean, well-ventilated shafts, the replacement cycle can be appropriately extended to 6–7 years—only if Nanjing Zhuye’s professional inspection confirms that the cable’s insulation performance, flexural performance, and signal transmission stability are all intact.

3. Immediate Replacement Conditions

• The cable sheath is severely worn, cracked, or broken, and the internal cores are exposed, posing short-circuit or electric shock risks.
• The elevator frequently malfunctions (such as sudden power failure in the car, unresponsive door control) and professional testing confirms the fault is caused by the traveling cable.
• The cable’s insulation resistance is persistently lower than 10MΩ, or the cable heats up abnormally during operation, indicating serious insulation damage.
• The cable has obvious kinks, core breakage, or deformation, and cannot be restored to normal use through maintenance.