AC/DC 300 A LOOP-POWERED CURRENT TRANSFORMER
The QI-300-I is an AC/DC current transformer which is galvanically isolated from the measuring circuit. The function and appearance of this device are very similar to a standard active CT, however it is able to measure the DC component and AC RMS.
The transducer is loop-powered with current 4-20 mA so needs no direct power supply. It is the first loop-powered Hall effect transformer with 0.5% accuracy on the market.
RMS AC/DC loop-powered current transformer, 0…300 A bipolar, analogue output 4…20 mA on loop, range set by dip-switch, ready for both vertical and horizontal DIN rail mounting.
TECHNICAL FEATURES
| POWER SUPPLY | Passive loop, 11…30 VDC, protections against polarity reversal and overtemperature. |
| ABSORPTION | Less than 3.5 mA |
| DEGREE OF PROTECTION | IP20 |
| ACCURACY CLASS | 0.5% FS |
| RESOLUTION | 12 bit |
| TEMPERATURE COEFFICIENT | < 200 ppm/°C |
| RESPONSE TIME | 1000 ms |
| HYSTERESIS | 0.2% FS |
| WORKING TEMPERATURE | -15…+65°C |
| TYPE OF MEASUREMENT | RMS (monopolar) or DC |
| RANGE | ±300 Arms or ±150 Arms set by dip-switch |
| CREST FACTOR | 2 |
| BAND WIDTH | DC or 20…2000 Hz |
| ISOLATION | 3 kV on bare wire |
| OVERLOAD | 2000 A pulse, 500 A continuous |
| OUTPUT | 4…20 mA |
