What's the differences between STS and ATS?

STS (Static Transfer Switch): 

Extremely fast (usually ≤5 milliseconds). Achieving essentially uninterrupted operation.

ATS (Automatic Transfer Switch): Slower (usually tens of milliseconds to several seconds). noticeable flickering of lights occurs during switching.

Applicable Loads

STS: Used for capacitive loads such as servers, storage devices, PLCs. These devices are extremely sensitive to power interruptions, and even a few milliseconds of outage can cause crashes, so STS must be used.

ATS: Such as air conditioners, lighting, motors, and pumps. These devices can tolerate brief power outages during switching and always used at the main building input.

Cost and Heat Dissipation

STS: Higher cost, generates heat during conduction, usually requires forced cooling.

ATS: Relatively lower cost,small contact resistance, basically no heat generation.

Power Supply Method: 

STS and ATS do not generate electricity; they are only responsible for switching between two input power sources.

STS: Provides millisecond-level switching to prevent instantaneous power interruptions.

STS Application

◆ Power plant/power dispatch center;

◆ Air traffic control/satellite communication broadcasting;

◆ Safety and Process Control in the Nuclear Industry;

◆ Financial Industry Computer Center;

◆ E-commerce Data Processing Center;

◆ Information Center for Large and Medium sized Industrial and Mining Enterprises;

◆Hospitals and Healthcare Facilities;

◆Semiconductor Manufacturing;

◆Telecommunications;

◆Any facility relying on distributed generators and sensitive electrical equipment.