Essentials of ARD Elevator Emergency Rescue Device

Essentials of ARD Elevator Emergency Rescue Device: A Comprehensive Analysis from Installation and Debugging to Troubleshooting

During elevator operation, sudden power failure or phase sequence loss is one of the main reasons for passengers being trapped in the elevator. To ensure passenger safety and enhance the intelligence level of elevator systems, Automatic Rescue Devices (ARD) have emerged. ARD is used as a backup power source for charging when the mains power is normal. Once an abnormal mains power is detected, it immediately switches to emergency operation mode, drives the elevator controller to run the car to the nearest floor at emergency evacuation speed, and opens the door to release people. This article will take the MCTC-ARD-C-4015 ARD as an example to systematically explain its technical specifications, installation wiring, debugging process, maintenance points, and fault diagnosis, providing a complete technical manual for elevator maintenance engineers.

Product Overview and Working Principle

The core function of ARD is "monitoring switching rescue reset". When the mains power is normal, the ARD is in standby charging mode, and the internal battery pack is charged with constant current and constant voltage; At the same time, ARD will directly connect the mains power to the elevator control cabinet, and the elevator will operate normally. When ARD detects that the three-phase 380V input voltage is below the threshold or a phase loss occurs, the internal relay will activate, cutting off the mains input. The inverter circuit will take power from the battery and output a single-phase 380V/50Hz emergency power supply to the elevator control cabinet. After receiving the "emergency operation start signal", the elevator controller controls the elevator to run at a low speed (usually 0.3-0.5m/s) in the direction of light load to the nearest level position. After opening the door and delaying for a period of time, the ARD automatically closes the output and completes the rescue.

This design fully complies with the requirements of GB/T 26465-2019 "Safety Code for Manufacturing and Installation of Fire Elevators" and relevant international standards for emergency rescue devices in elevators.

Technical specifications and model rules

1. Model interpretation

Taking MCTC-ARD-C-4015 as an example:

MCTC: Product series identification.

ARD: Emergency rescue device.

C: Design code.

40: Suitable for elevator rated power? The actual corresponding battery capacity and inverter power should refer to the selection manual for details.

15: It may be a battery capacity code (such as 15Ah? But the technical parameters show 12V × 3 × 7Ah, which means three 7Ah batteries connected in series are 36V, and then stepped up to 380V through inverter).

2. Core parameters (taking MCTC-ARD-C-4015 as an example)

Project specifications

Input voltage three-phase 380-440VAC, 50/60Hz

Output voltage (emergency) single-phase 380VAC, 50 ± 5Hz

Battery parameters 12V × 3 × 7Ah (36V in series)

Protection function output short circuit, overcurrent, battery protection

Working environment -10 ℃ to+40 ℃,<95% RH, no condensation

Storage temperature -20 ℃ to+60 ℃

Protection level IP20

Vibration tolerance<5.9m/s ² (0.6g)

Altitude<1000m (if exceeded, reduce rating or consult manufacturer)

3. List of main components

Component specifications/models

Circuit Breaker (MCB) ARD3T153U1

Drive board ARD3T153M1

Battery LECOH DJW12-7.0 (12V 7Ah)

Contactor Siemens 3RT6028-1AN20380VAC/38kW

Air switch Delixi DZ47NC10400V/3A

The battery adopts three 12V 7Ah maintenance free lead-acid batteries connected in series, with a total nominal voltage of 36V and an actual working voltage range of about 30V~42V. The battery life is usually 3-5 years, depending on the ambient temperature and the number of charge and discharge cycles.

Installation points: Position selection and mechanical fixation

ARD is usually installed next to the control cabinet in the elevator machine room or shaft. The installation environment must meet the following requirements:

No conductive dust, corrosive gases, flammable gases, metal powders, oil mist.

The ambient temperature ranges from -10 ℃ to+40 ℃. If it exceeds this range, temperature control measures must be taken.

Reserve sufficient maintenance space, especially for battery replacement channels.

Installation method

ARD supports both wall mounted and floor standing installations, with specific dimensions varying depending on the model. Taking MCTC-ARD-C-4015 wall mounted as an example:

Width 248mm, height 383.4mm (including installation ears), thickness approximately 151mm.

Installation hole spacing: A=217mm (horizontal), H1=383.4mm (vertical top hole spacing), H2=480mm (bottom hole spacing), B=430mm (bottom plate width).

The gross weight is about 15kg.

Installation steps:

Use expansion bolts to fix the hanging plate to the load-bearing wall.

Hang the ARD onto the mounting plate and tighten the bottom bolt.

Ensure that the equipment is vertical and the tilt angle does not exceed 5 °.

Remove the front cover

Before carrying out electrical wiring, the front cover must be removed: