Product Parameter 1. It can output three-phase 0-500a current at the same time. 2. It can synchronously test the action time of thermal relay thermocouple and motor protector. 3. Normally open and normally closed contact detection. 4. Several calibrations can be connected in series at the same time to improve working efficiency. Product Parameter 1. AC current output: 0-500a (customizable) 2. Digital AC ammeter: 4 ½ 0.5 class accuracy A. Digital timer Timing length: 0 ~ 999.999 seconds Error: class 0.2 accuracy B. Boundary dimension: 44 30 34cm C. Weight: 7kg