... wave output 3. With manual bypass 4. UPS, ECO, EPS Mode Three Phase Double Conversion Online Uninterruptible Power Supply ... reliability by two methods :Hot standby redundancy : By dual loops designParallel redundancy : Unites up to 8 UPS ... bypass Switching time0ms(adopted static switch )protectioninputvoltage,frequency ultralimit,phase wrong,phase lost outputovercurrent, short circuit, power factor ...