將負(fù)載從常用電源轉(zhuǎn)換至備用電源，并在常用電源恢復(fù)正常時(shí)，
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以人民的名義，正品，全新，現(xiàn)貨，原裝。特價(jià)
將負(fù)載返回?fù)Q接至常用電源（兼斷相保護(hù)功能）。
◎開關(guān)可能根據(jù)用戶要求設(shè)置電源下降時(shí)切換電壓范圍。
技術(shù)參數(shù) ●開關(guān)控制器工作電壓為AC220V。 ●開關(guān)機(jī)械壽命(N-R-N循環(huán))為5000次。
●最小轉(zhuǎn)換動(dòng)作時(shí)間為1.5~4S。 ●開關(guān)具有失壓、欠壓、過壓、斷相、延時(shí)、啟動(dòng)油機(jī)、消防、
自投不自復(fù)、備用優(yōu)先、切換功能。 ●開關(guān)隨機(jī)攜帶操作手柄、作為應(yīng)急手動(dòng)操作開關(guān)之用。
（在斷電情況下使用） ●具有三種穩(wěn)定工作狀態(tài)：狀態(tài)Ⅰ：常用電源合，備用電源合，
狀態(tài)Ⅱ：常用電源分，備用電源合； ●狀態(tài)Ⅲ：常用電源分，備用電源分。
正常工作條件
The load is transferred from a common power supply to a standby power supply,
Change the load back to the common power supply (and phase protection).
The switch may be set according to user requirements of power down when the switching voltage range.
The working voltage of the switch controller is AC220V. Switch mechanical life (N-R-N cycle) for 5000 times.
Minimum conversion b time is 1.5~4S. Switch with pressure, under voltage, overvoltage, phase failure, delay, start the engine, fire,
Since the b is not self recovery, standby priority, switching function. Use the switch to operate the handle as an emergency manual switch.
(in the case of power failure) with three stable working state: state I: common power supply, standby power supply,
State II: commonly used power points, standby power supply; state III: common power points, spare power points.
Normal working condition