ATSE dual power automatic transfer switch terminology dual power automatic transfer switch (ATSE) into CB-level and two-level PC level. CB Grade: with overcurrent release of ATSE, it can be switched on and the main contact for breaking short-circuit current. PC level: the ability to access, load dual power device business, but not for short-circuit breaking current ATSE. Use category: AC-33B, applicable motor mixed loads, which include motor dual power supply units, resistive load and 30% or less incandescent load, making and breaking 6le, cosφ = 0.5. Use category: AC-31B, apply no sense or slightly inductive loads, making and breaking current 1.5le, cosφ = 0.8. Principle of double power automatic switch explanation dual power automatic transfer switch is mainly used in the emergency electrical power supply system, the load circuit from a power supply connected to wrap another (backup) power switch appliances, to ensure that critical loads continuous, reliable operation. Therefore, it is often used in important places of electricity, and its reliability is particularly important. Once the conversion failure may cause harm to one of the two following, a short circuit between the power load or significant outage (even brief power outage), the consequences are serious, not only will bring economic losses (so that the production halt, financial paralysis), may also cause social problems (make life and safety at risk). Therefore, the industrial countries regard the automatic transfer switching equipment production, use as a key product restrictions and specifications. Our dual power automatic transfer switch on the switch and the market time to compare STQ4 series dual power automatic transfer switch is my factory developed its own new high performance automatic transfer switching equipment, given by two GM Series Plastic insulation voltage 690V and below WATSG double power supply units, AC 50Hz dual power emergency power supply system that can be completed automatically converted common power supply and backup power supply to the load off between. Mechanical switch currently used on the market, generally divided into two kinds of electromagnetic drive and motor drive, electromagnetic drive conversion faster, like a general is 2-4s. Therefore, according to the load off time permitted to choose ATSE forms and types. Here emphasize that: A fast conversion speed again, and you can not omit the UPS. ATSE, UPS is the emergency power supply system from the different interactions can not be replaced electrical equipment. Select ATSE conversion time, to distinguish it from time to determine whether or not to convert. To clear whether the conversion of judgment, one should first look at the power load on the power supply requirements, primarily power supply voltage and frequency, so ATSE also monitors the input voltage and frequency of the power supply. Most load above; frequency of more than 95% of the rated frequency. In some special cases, power requirements may be higher. The delay occurs when the system is in the selection so we, the grid is often affected by outside interference and voltage fluctuations (frequency fluctuations are relatively rare), then the low voltage to a value other than the choice often), taking into account the conversion time of ATSE seconds level, this set the delay time for the second level can be. When setting the conversion of delay as the consumer, to determine a clear understanding of ATSE conversion time delay difference between mechanical conversion time. Dual power device company | Double-Electric (certified) | Dual power supply unit from Shanghai only Thai Industrial Co., Ltd. Yueqing Branch provided. Shanghai only Thai Industrial Co., Ltd. Yueqing Branch (www.cnats.cc) is Wenzhou, Zhejiang Province, switch leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the only Thai Industries led the staff warmly welcome all inquiries negotiations to create only a better future for Thai Industries.