System Structure
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3 System Structure
3.1 System Connection Diagram
When the AC drive is used to control asynchronous motors to form a control system, a
variety of electrical devices must be installed on the input and output sides of the AC
drive to ensure system safety and stability. The following figure shows how to
configure the AC drive.
Figure 3‑1 System structure
Table 3–1 Description of peripheral parts
Device
Description
Circuit breaker
Installed between power supply and AC drive input side.
Circuit breaker for protection against short circuit: Cuts off power supply when overcurrent
occurs on downstream devices.
Earth leakage circuit breaker: Provides protection against potential leakage current during
operation to prevent electric shock and even a fire. Select proper earth leakage circuit
breakers as needed.
Fuse
Protects downstream semiconductor components in case of short circuit.
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