One of the core components of the switchgear--chassis truck.
The chassis truck, also commonly referred to as the withdrawable truck or removable unit, is one of the most critical operational and functional components in a removable (truck-type) medium-voltage switchgear, such as the common KYN28A-12 model. It is essentially a mobile platform that can be smoothly racked in and out of the switchgear cabinet along its ground rails.
What is a Chassis Truck?
You can think of it as a heavy-duty, industrial-grade "drawer." All primary electrical components, such as the vacuum circuit breaker, voltage transformer, arrester, or isolation switch, are fixed onto this "drawer." By racking the chassis truck into the "service position" or out to the "test/disconnected position," the main circuit can be connected, tested, or completely isolated.
Key Functions: Enabling the "Five Protections" Interlocking
Prevents operating the isolation switch on load.
Prevents erroneous opening/closing of the circuit breaker.
Prevents energizing with the earthing switch closed.
Prevents closing the earthing switch on a live circuit.
Prevents access to energized compartments.
What types of chassis trucks does Shuowei offer?
Manual Chassis Trucks
Electric (Motorized) Chassis Trucks
Simplified Selection Comparison Table: Manual VS Electric Chassis Trucks
|
Comparison Dimension |
Manual Chassis Truck
|
Electric Chassis Truck
|
|
Operation Mode |
Manual handle operation |
Electric/remote operation (some with emergency manual function) |
|
Operation Efficiency |
Labor-intensive, low efficiency |
Labor-saving, high efficiency |
|
Automation Compatibility |
Does not support remote/programmed operation |
Supports automation and remote control |
|
Structure & Failure Rate |
Simple structure, low failure rate |
Complex structure, relatively higher failure rate |
|
Cost (Purchase + Maintenance) |
Low cost |
High cost |
|
Power Requirement |
No power supply needed |
Stable power supply required |
|
Application Scenarios |
Low-frequency operation, cost-sensitive, no automation needs |
High-frequency operation, automated operation and maintenance, remote control needs |
