Hengda Phase Sequence Protector XJ11: Critical Power Protection for Elevator Safety

Proper Usage Methods of Hengda Phase Sequence Protector XJ11

1. Installation & Commissioning

• First, thoroughly clean the installation position in the elevator control cabinet to remove dust, oil stains, and debris, ensuring a stable and flat mounting base for the protector. Avoid installing it near heat sources or high-voltage components to prevent interference.
• Fix the protector firmly on the mounting rail in the control cabinet using the matching clips. Ensure the installation direction is correct (as indicated by the arrow on the protector) and there is sufficient ventilation space around it to facilitate heat dissipation.
• Correctly connect the wiring: According to the wiring diagram provided by Nanjing Zhuye Elevatorparts and Hengda, connect the three-phase power input wires (L1, L2, L3) to the corresponding input terminals of the XJ11, and connect the output control wires to the elevator main controller. Ensure the wiring is tight and reliable, and the wire insulation layer is intact to avoid short circuits. Pay special attention to the phase sequence during wiring to ensure consistent with the protector’s detection requirements.
• After installation, conduct commissioning: Power on the elevator power supply system, check if the power indicator light of the XJ11 is on normally. Simulate common power supply abnormalities (such as phase reversal, phase loss, and undervoltage) using professional tools to verify if the protector can trigger the protection function accurately and send a fault signal to the elevator controller. Confirm that the elevator stops running immediately to avoid dangerous operations when the protector is triggered.

2. Daily Operation & Routine Inspection

• During daily elevator operation, monitor the indicator light status of the XJ11 through the observation window of the control cabinet. The normal working status is indicated by a steady green light; a red light or flashing light indicates a power supply abnormality or protector fault, which requires immediate inspection.
• Carry out weekly visual inspections: Open the control cabinet door (after power off and ensuring safety) to check the appearance of the XJ11 for damage, such as cracks or deformation of the shell, looseness of wiring terminals, and damage or aging of wires. Retighten loose terminals in a timely manner and replace damaged wires if necessary.
• Regularly check the protector’s fault recording function (if equipped). For frequent power supply abnormality alarms, trace the root cause of the power supply problem and solve it promptly to avoid long-term impact on the protector’s service life.

3. Regular Maintenance

• Every 3 months, thoroughly clean the protector and its surrounding area in the control cabinet. Use a dry, lint-free cloth to wipe off dust and debris; avoid using water, alcohol, or corrosive cleaners that may damage the shell and internal electronic components.
• Every 6 months, recheck the wiring connections and tightness. Use a multimeter to detect the input and output voltage of the protector, verifying that the detection parameters are within the standard range. If there is any deviation, contact Nanjing Zhuye Elevatorparts’ professional technicians for calibration.
• Annually, conduct a comprehensive performance test: Use professional instruments to detect the protector’s phase sequence detection accuracy, response time, and over/undervoltage protection range. If the performance indicators do not meet the requirements, replace the relevant components or the entire protector with original parts supplied by Nanjing Zhuye Elevatorparts to ensure consistent safety performance.

Recommended Replacement Cycle of Hengda Phase Sequence Protector XJ11

1. Standard Replacement Cycle

2. Scenario-Based Cycle Adjustment

• Harsh Operating Environments: For elevators operating in high-humidity coastal regions, high-dust construction sites, high-temperature unventilated machine rooms, or areas with unstable power grids (frequent voltage fluctuations), the replacement cycle should be shortened to 4–5 years. Harsh conditions accelerate the aging of internal electronic components, corrosion of terminals, and degradation of detection performance, reducing the protector’s reliability.
• Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with less than 3,000 monthly operations) and stable power supply conditions, the replacement cycle can be appropriately extended to 7–8 years after a professional inspection by Nanjing Zhuye Elevatorparts confirms that the protector’s detection accuracy, response performance, and structural integrity are intact.

3. Immediate Replacement Conditions

• The protector fails to trigger the protection function when power supply abnormalities (phase loss, phase reversal, over/undervoltage) occur, or triggers false alarms frequently (≥3 times per week) that cannot be eliminated after maintenance.
• The shell is severely cracked, deformed, or burned, and the internal electronic components are exposed or damaged.
• The wiring terminals are severely corroded or loose, and cannot be fixed firmly even after replacement, posing potential electrical hazards.
• The protector fails the annual performance test, and the performance indicators cannot be restored to the standard range after maintenance or component replacement.