... :The machine has the following protect function such as over-current, over voltage, and anti-pole, missing phase, short circuit protection ... ; The machine has the following protect function such as over-current, over pressure/voltage, and anti-pole, missing phase, short ... 24h Range of voltage controlled : 0.5% ~ 100% Range of current controlled : 1% ~ 100% Minimum time interval data collection: 1 S ...