- Xi'an Excellent Electromechnical Co.,Ltd
- Shanxi
● Technical Specification:
⒈ | Application Range | Applicable to all elevators with moveable car platform in need of overload signal with a inspection clearance of 8～15㎜. |
2 | Sensitivity | Overload turning point≤Rated load adjusting point±0.05㎜ |
3 | System Error | ≤1.5% (5～40℃) |
4 | Output Mode | 1 pair of relay dynamic CLOSE or dynamic OPEN contacts respectively with the capacity of DC/AC 48V/500mA. |
5 | Operation Ambient Temperature | -25～55℃ |
6 | Power Supply | AC/DC 24V(±10%)/15mA. The operating current of the whole machine≤100 mA. |
7 | Install Position | Moveable elevator car platform |
8 | Overall Size | Column of Φ24×83 mm |
Type EWD-H-P1 Elevator Load Weighing Device
INTRODTION MANUAL
● This system is applicable to all elevators with moveable car platform in need of overload signals. This device is of extremely high performance-price ratio. This appliance is to overcome the inherent disadvantage of the mechanical overload switch and to replace it.
● Main Property:
1. Working in a contactless and inductive way. No mechanical movement itself. Being directly installed in the original place of overload switch. No necessity of changing the mechanism of elevator car.
2. Adopting strong inductive magnet, improving the anti-interference of the system to the utmost.
3. The electrical property is in compliance with the standard of the International Electrotechnical Commission (IEC).
4. More accurately positioning, small overall size, easy installation and adjustment, simple structure and low price.
● Working Principle:
This system weighs the elevator car load based on the principle of the elastic deformation of movable elevator car platform caused by loading with the HALL sensor measuring the change of displacement, fulfilling the aim of load weighing.
● Adjustment
1. Please refer to the above figure to install this device with the connecting support (made by the customer himself) close to the middle part of the car platform as near as possible.
2. Let the magnet adhesive on the car platform with the marking-face right facing the induction point of the device.
3. Install and adjust this device so that the magnet on the car platform aims at the center point of its upper face. Meanwhile, assure the end face of this device in parallel with that of the magnet.
When elevator is of rated loaded, adjust this device up and down to make the indicator just turn from dark to bright (or oscillating), at this time, fasten this device and the adjustment is finished.
● The principle of system wiring:
Wire | Function | Explanation |
Red, black | Sys Operating Power | Operating Power AC/DC24V(±10%)/100mA |
Yellow, White | Overloading relay dynamic Close contact |
Contact Capacity: DC/AC 48V/500mA |
Blue, green | Overloading relay dynamic Open contact |
● Comparison of the functions with other load weighing devices
| EWD-H-P1 | Mechanical overloading switch |
Working Principle | By the use of Hall sensor, the working way of contactless induction is realized. Advantages：①The system doesn’t bear the elevator load directly, extending its life.②Overloading signal is of point turning to position more accurately.③No system damage caused by the insufficiency of overloading competence or mechanical vibration. | Directly bearing the effect and impact of elevator load, unstable and damageable. |
Installingand adjusting | Just adjust the system up and down so that the indicator will turn from dark to bright. At the turning point, fasten this device well.
| Field adjustment is complicated. |
Output signal | A pair of relay dynamic Close and Open contacts respectively. | Single function |
Economic Analysis | ⒈High ratio of property to price, easy use, high reliability. | Average
|
● Others:
Accessory: Inductive magnet [20×20×4mm3] 1 piece Fastening Nut: 2 sets
If there is any abnormality during adjustment or operation, contact our company directly.
Attention: The tombarthite magnet with strong magnetic is specially made for this products, please be careful in the installation process; do avoid the temperature above 100℃ in case of demagnetization; our company will not responsible for any loss for person and the device caused by unsuitbale operation otherwise.
Contact information:
Contact person:Cherry Wang
E-mail:sales02@xaest.com wxjliang@hotmail.com
Website: ww.est-elevator.com
whatsapp:008615710486683
Tel:008615710486683
Skype:wxjliang
Wechat:wxjcherry