The Bypass Switch, also referred to as the Normal-Inspection Switch, plays a crucial role in elevator maintenance. This safety feature temporarily overrides the electrical safety circuits of both the floor (landing) doors and the car (cabin) doors. You can find the Bypass Switch in the control panel, emergency and test panel, or the inspection control station.
Purpose of Bypass Switch
The primary purpose of the bypass switch is to enhance safety during elevator maintenance or inspection. It allows maintenance personnel to safely isolate and work on the elevator doors without the risk of the elevator operating unexpectedly.
Functionality
- To ensure safety, technicians can override the safety circuits, allowing them to manually operate the doors or leave them open without causing the elevator to shut down automatically.
- Additionally, activating the bypass switch initiates a sequence that places the elevator into maintenance or inspection mode, thereby preventing its use for normal passenger service.
- Furthermore, some bypass switches are equipped to activate both audible and visual alarms, alerting everyone nearby that the elevator is in maintenance mode and should not be used.
Where will you see the Bypass Switch in elevator system
(1) In the PANEL BOARD DEVICE, collaboration is key for efficient maintenance at the Station. Combine the Emergency Stop Button, UP Push Button, Down Push Button, and Common Push Button to enhance operational safety. Furthermore, this device serves as an Enclosure Bypass Switch within an IP65 box and can be mounted using a Rear Fixing Bypass Switch with 2 holes (28mm apart) or via DIN-rail Mounting.
(2) In the PANEL BOARD DEVICE, collaboration is key for efficient maintenance at the Station. Combine the Emergency Stop Button, UP Push Button, Down Push Button, and Common Push Button to enhance operational safety. Furthermore, this device serves as an Enclosure Bypass Switch within an IP65 box and can be mounted using a Rear Fixing Bypass Switch with 2 holes (28mm apart) or via DIN-rail Mounting.
(3) For the PIT BOTTOM CONTROLS, the focus remains on safety and functionality. Connect the Emergency Stop Button, Common Push Button, UP Push Button, Down Push Button, and Socket Outlet to create an inspection box tailored to your specific needs.
SCHEME (Connecting Diagram)
1-2 Normal-Inspection 1NO+1NC / 2NO+2NC / 3NO+3NC
Contact us for more connecting diagrams or customize your own diagrams.
Setting Requirements
- Labeling: The bypass switch is typically labeled clearly to indicate its function, also it will show whether it is in the bypass or normal mode.
- Operation Restrictions: When the bypass is engaged, the elevator is restricted from normal operation, and it can only be moved in a controlled manner, usually in inspection mode.
Inspection and Safety
- Safety Checks: To ensure safety, the bypass switch includes essential safety checks that can only be performed by authorized personnel who follow strict procedures.
- Proper Use: For proper use, it is imperative that the bypass switch is operated correctly and subsequently returned to its original position post-maintenance. This step is vital to guarantee the elevator’s safe operation.
The bypass switch plays a crucial role in the elevator maintenance toolkit. It offers a vital safety measure, ensuring the correct operation and safety for both maintenance personnel and elevator users.
