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A Brief Self-Nomination, Why Choose 123?

Founded in 1999, 123 electric is an industry leader in Dual Power Switching Equipment (ATSE) with 20 years of experience in the design,
manufacture and distribution of solutions.

1.Launched China's first integral type YUQ3 special CB ATSE in 2015.

2.The first ATSE manufacturer that can provide AC-DC and DC-DC switchover.

3.The first ATSE manufacturer in China that can provide 16A-3200A current level of the same structure (special PC level).

4.The first ATSE manufacturer in China that can provide pull-out type with bypass.

5.The first ATSE manufacturer in China that can provide Instantaneous closed circuit switchover.

6.The first ATSE manufacturer in China that can provide neutral line overlap switchover.

7.The first ATSE manufacturer that can provide AC-DC and DC-DC switchover.

All 123 products are covered by a 2 year standard warranty. When our products have questions, our team will feedback the solution within 24 hours and engineers can arrive at the site within 48 hours. Our support return and exchange services.

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PC Class Automatic Transfer Switch

PC automatic transfer switch referred to as ATS,does not have overload and short circuit protection function, its executive element for the isolation switch, its driving element for the electromagnetic coil, the action speed is very fast.

16A-32A Automatic Transfer Switch

NA series 16A-630A integral type two working positions intelligent ATSE with 2p/3p/4p

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100 amp changeover switch

SA series 16A-630A integral type three working positions ATSE intelligent mini automatic transfer switches with communicating generator changeover 2p/3p/4p

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3 Phase Automatic Changeover Switch

GN series 16A-630A integral type three working positions ATSE intelligent three-phase sampling function china automatic changeover switch with 2p/3p/4p

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CB Class Automatic Transfer Switch

CB automatic transfer switch referred to as ATS, overload and short circuit protection function, its executive element is the circuit breaker, its driving element is the motor, the action speed is relatively.

The Classification Of Automatic Transfer Switch Equipment(ATSE)

Automatic transfer switches fall into two categories: derived ATSE and specialized ATSE.
Derived ATSE :
CC class, use the contactor as the main switch, general complete set of electrical manufacturers will use CC class lap;
Derived PC class, use load isolation switch as the main switch, such as SOCOMEC products;
CB class ,use circuit breaker as the main switch, such as ABB, Schneider, products.

PC Class

CB Class

What Are The Specific Differences Between The All Kinds Of Automatic Transfer Switch Equipment(ATSE)?

PC Class：Able to connect and load current, but is not used for breaking short circuit current.
CB class：ATSE with current release,its main contact can be switched on and used to break short circuit current.
Derived CB calss：It is equipped with two isolating switches, which can be switched on and loaded. It is not used to break short circuit current.
CC class：Able to connect and load current, but is not used for breaking short circuit current.The main body is composed of electromechanical contactor to meet the requirements.Main contact is allowed for fusion welding after being impacted by short-circuit current.However, in ATS, fusion welding is not allowed.

So,all ATSE made up of circuit breakers are class CB ATSE.The ATSE composed by load isolating switch belongs to the derived PC class ATSE.Teh integrated design combination ATSE is special ATSE

Precautions & Guide For Automatic Transfer Switch

To prepare for everything and avoid potential risks, it is important to note the following

Considering personal safety and switching speed, the debugging handle is only used for debugging. Users is not allowed use the debugging handle with load operation. And it is not allowed use when the arc extinguishing device is not installed. When debugging, the switch is operated with the debugging handle .To observe the close of the main contact and Running conditions.All are no abnormal situation, then the ATS switch can be work.

1. After debugging Controller and part of mechanical ,the controller and electrical part can be adjustedof the power-on debugging, the load is prohibited during the debugging process.

2. Put in the normal power into the products, the normal power indicator is light up, and then put in the standby power ,the standby power indicator is light up. and press the“Manual/Auto” button is placed in the manual position,Then press the "main power manual" button,The ATS will transfer to Main power quickly, The normal power indicator and external connecting indicator lamp is light up.Press the "standby power Manual", The ATS will transfer to Standby power quickly, The standby power indicator and external connecting indicator lamp is light up.

3. The "Manual/Auto" buttonis placed in the automatic position, delay time of normal power and standby power are adjusted to the appropriate value. The normal power supply is disconnected first, and the indicator of normal power Switch on is flashed on. When reached the setting of delay time value, The ATS will quickly switch to standby power supply automatically.The standby power indicator and external connecting indicator lamp is light up.

When the main power is return,the ATS will switch to Normal power supply, the indicator of standby power switch on is flashes, When reached the setting of delay time value, the ATS will quickly transfer to the normal power supply, The normal power indicator and external connecting indicator lamp is light up.

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