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02,Apr,2025
What is the main purpose of a current transformer? + Read More
Digital Combined meters (instrument for shortbelow) are a sort of electronic measuringinstrument developed for measuringseveral parameters of the electric network, which are mainly used in thereal-time measurement and indication on three-phase current, three-phasefour-wire voltage and frequency The main features are as following:
Mostly instruments can measure three current of (lA, lB, IC)six voltageOf (UA, UB, UC, UAB, UBC, UCA) and one frequency ,can an instead ofseveral common indicating meters;
Adopt SMT product techniques ,compact circuit, high reliability;
AC sampling,RMS measuring mode, wave distortion doesn't effect theaccuracy;
Display multiply power is programmable and apply transformer withspecifications of 5-10000A;
Setting function of digital filtering time.
| Input | Voltage | Rated value | AC57.7V,100V,220V,380V |
| Overload | Consistent 1.2times instantaneous 2times/30sec | ||
| Consumption | <1VA(each phase) | ||
| Impedance | >500kΩ | ||
| Current | Rated value | AC 1A、5A | |
| Overload | Consistent 1.2times instantaneous 2times/ses | ||
| Impedance | <20m Ω(each phase) | ||
| Frequency | 45~65Hz(Availablein30%~120% ofvoltage scope) | ||
| Measuring accuracy | Voltage,current | ±(0.5%FS+2digital) | |
| Frequency | ±0.1HZ | ||
| Source | Scope | AC220V+10%,0/60HZ | |
| Consumption | <5VA | ||
| Safety | Withstand voltage | >2kV 50Hz/1min | |
| Insulatingresistance | Any two ofinput,output,source,casing>20MQ | ||
| Environment | Temperature | Operation:-10-50℃ Storage:-25~70℃ | |
| Humidity | ≤85%RH, free of wet and corrosive gas | ||
| Elevation | <3000m | ||
