| Characteristic | Value | 
        
            | AC power supply voltage, V 
 | 220±22 or 380±38 | 
        
            | Power supply frequency, Hz 
 | 50±1 | 
        
            | Maximum output current when powered from 220 V circuit, kA | 14 | 
        
            | Maximum output current when powered from 380 V circuit, kA 
 | 20 | 
        
            | Test current measurement range, kA | 3...20 | 
        
            | Range of measurements of the test current supply time, s 
 | 1...7200 | 
        
            | Range of measurements of the test current supply time, ms | 50...990 | 
        
            | Reduced error of the test current measurement, % 
 | ±3 | 
        
            | Reduced error of the measurement of the current flow duration and switching off time, %, max 
 | ±3 | 
        
            | Continuous running time under the maximum current, s, min 
 | 10 | 
        
            | Maximum consumed power, kVA | 55 | 
        
            | Net weight of IT-20 (current supply), kg, max | 80 | 
        
            | Net weight of the control unit (without flexible busbars), kg, max | 20 | 
        
            | Dimensions, mm, max 
 | 960х680х400 | 
        
            | Lifespan, years, avg | 10 |