Elevator Limit Speed Governor XS3/XS3-B: Over-Speed Protection Core from Nanjing Zhuye Elevatorparts

Step-by-Step Usage Guide for Elevator Limit Speed Governor XS3/XS3-B

1. Professional Installation & Debugging

• Safety Preparation: Cut off the elevator’s main power supply and fix the elevator car to a safe position using a safety clamp. Locate the speed governor mounting position (usually in the machine room, above the elevator shaft) and clean the installation area to remove dust, oil stains, and debris that may affect installation accuracy and operation.
• Device Installation: Fix the XS3/XS3-B speed governor’s main body to the dedicated mounting bracket in the machine room using high-strength bolts provided by Nanjing Zhuye Elevatorparts. Ensure the device is installed horizontally (tilt angle ≤ 2°) to avoid affecting the normal operation of the internal centrifugal mechanism. Install the speed governor rope onto the guide wheels, ensuring the rope is properly tensioned (tension value: 15–20 kN, depending on elevator model) and aligned with the rope pulley of the car and counterweight.
• Speed Setting & Debugging: According to the elevator’s rated speed (provided by the elevator manufacturer and Nanjing Zhuye’s technical guidance), adjust the speed setting bolt of the XS3/XS3-B speed governor. Set the primary overspeed triggering speed (usually 115% of the rated speed) and the secondary emergency triggering speed (usually 140% of the rated speed). Use a professional speed tester to simulate the elevator’s running speed, verifying that the speed governor can trigger the corresponding braking signal accurately and sensitively at the set speed. After debugging, lock the speed setting bolt with a lock nut to prevent artificial modification.
• Post-Installation Testing: Restore the power supply and conduct comprehensive functional tests. Operate the elevator to run at normal speed, overspeed (simulated), and wrong direction (simulated) respectively, checking the operation state of the XS3/XS3-B speed governor (no abnormal noise, sensitive triggering); verify that the emergency braking system can be activated immediately when the speed governor triggers. Recheck the speed setting value and rope tension after testing, ensuring no obvious changes. If there is abnormal noise, delayed triggering, or incorrect speed setting, recheck the installation and debugging immediately.

2. Daily Operation & Routine Inspection

• Daily Visual Inspection: During machine room patrols, check the external state of the XS3/XS3-B speed governor. Ensure the main body is free of deformation, rust, or cracks; the speed setting bolt and lock nut are tight with no looseness; the guide wheels rotate smoothly (no jamming) and the wheel groove is free of severe wear or damage; the speed governor rope is intact (no broken wires, wear, or loose tension).
• Weekly Functional Check: Operate the elevator to run through the full stroke, listen for abnormal noise (such as friction or collision) from the speed governor area. Manually rotate the speed governor’s handwheel to check the flexibility of the internal mechanism and the reliability of the triggering signal. Check the connection between the speed governor and the emergency braking system, ensuring the signal line is intact and tightly connected.
• Monthly Parameter Monitoring: Use a professional speed tester to measure the speed monitoring accuracy of the XS3/XS3-B speed governor. Clean the main body, guide wheels, and rope with a dry, lint-free cloth to remove dust and oil stains. For elevators in harsh environments, apply a small amount of special anti-rust lubricant (provided by Nanjing Zhuye Elevatorparts) to the guide wheel shaft and internal rotating parts to prevent rust and jamming.

3. Regular Maintenance Schedule

• Quarterly Maintenance: Disconnect the power supply, remove the speed governor rope from the guide wheels (if necessary), and thoroughly clean the guide wheels, wheel shafts, and internal centrifugal mechanism. Inspect the guide wheels for wear (replace if the wheel groove depth is reduced by more than 1mm) and the speed governor rope for broken wires or wear (replace if the wear degree exceeds 3%). Recheck and tighten all fixed bolts and lock nuts.
• Semi-Annual Performance Test: Conduct a comprehensive performance test, including speed monitoring accuracy, triggering sensitivity, and braking signal transmission reliability. Use a professional speed governor tester to simulate different overspeed scenarios and verify the device’s triggering stability. For elevators in high-traffic areas (e.g., shopping malls, airports) or harsh environments (high humidity, dust), increase the test frequency and check the connection between the speed governor and the braking system.
• Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Disassemble the XS3/XS3-B speed governor (by professional personnel) to inspect internal components (such as centrifugal weights, springs, and contact switches) for aging or damage. Replace worn components with genuine parts. Recalibrate the speed setting accuracy to meet the original factory performance standards and the elevator’s actual operating requirements.

Recommended Replacement Cycle for Elevator Limit Speed Governor XS3/XS3-B

1. Standard Replacement Cycle

2. Adjustments for Special Scenarios

• Harsh Environments: For elevators in high-humidity coastal areas (salt spray corrosion), high-dust construction sites, or elevators with frequent start-stop and speed changes (e.g., high-rise office building elevators), the replacement cycle should be shortened to 4–6 years. Harsh conditions accelerate the rust of the main body, wear of the centrifugal mechanism, and aging of the internal springs, significantly reducing the device’s reliability.
• Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and clean, stable machine room environments, the replacement cycle can be extended to 8–10 years—only if Nanjing Zhuye’s professional inspection confirms that the device’s speed measurement accuracy, triggering sensitivity, and mechanical performance are all intact.

3. Immediate Replacement Conditions

• The speed governor fails to trigger the braking signal accurately at the set overspeed (error exceeding 5%), or there is a triggering delay (exceeding 0.3s), and the fault cannot be eliminated through debugging and maintenance.
• The internal centrifugal mechanism is stuck or severely worn, leading to inability to rotate flexibly with the elevator speed change; the guide wheels are cracked, stuck, or severely worn, affecting the normal operation of the speed governor rope.
• The main body is severely rusted, deformed, or cracked, failing to bear the rated mechanical load and posing safety hazards; the speed setting bolt is damaged, making it impossible to lock the speed value.
• The speed governor rope has more than 10 broken wires per meter or the wear degree exceeds 5%, and replacement of the rope cannot restore the device’s normal performance.