Reactive power VAr transducers |
Powertek |
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Selection Guide |
| MT100-XA1 | Single Phase |
| MT100-XA2 | 3 phase 3 wire balanced load |
| MT100-XA3 | 3 phase 4 wire balanced load |
| MT100-XA4 | 3 phase 3 wire unbalanced load |
| MT100-XA5 | 3 phase 4 wire unbalanced load |
| MT100-XA6 | 3 phase 3 wire balanced load externally connected |
| reverse C.T's | |
| MT100-XA7 | 3 phase 3 wire balanced load internally reversed C.T's |
Typical Applications |
| The MT100-XA series measure reactive power in single, 3 phase 3 or 4 wire balanced and unbalanced systems. Using the time division multiplier circuit means that they can be used over a wide range of input waveforms. The D.C. output signal is directly proportional to the instantaneous reactive power being measured. Typical Applications include the measurement of reactive power in switchboards, power stations and generating sets etc. The high isolation of 4kV as with all MT100 series allows these VAr transducers to be connected to a variety of measuring and control devices and systems, such as analogue meters, PLC, computer systems, data loggers, digital instruments and telemetry systems. Both auxiliary powered and self powered versions of each type are available. It is recommended to use an auxiliary powered version if the system being measured has voltage variations in excess of ±20% |
Technical Specifications |
| INPUT | |
| Rated value In: | 1A or 5A C.T connected or 0.5A-10A direct connected |
| Rated value Un: | 57.8Vrms to 600Vrms |
| Power Consumption | < 1VA voltage < 0.2VA current |
| Working Range | 0-125% Un auxiliary powered or 75%-125% Un self |
| powered 0-150% In | |
| Rated Frequency | 50 / 60 / 400Hz |
| Frequency Influence | 0.005% / Hz |
| Overload continuous | 4 x In 1.5 x Un |
| Overload for 1 sec. | 50 x In 2 x Un |
| OUTPUT | |
| Rated value mA | 0-1/5/10/20mA & live zero 4-20mA |
| Rated value volts | 0-5V/0-10V & live zero 1-5V |
| ADJUSTMENT | |
| Zero | ±2% |
| Span | ±10% |
| AUXILIARY | |
| A.C. Voltage | 115 / 230 / 400V (±25%/45-65Hz/<2VA) |
| D.C. Voltage | 24/48/110V (±20%/galvanically isolated/<3W) |
| WEIGHT&CASE SIZE | |
| MT100-XA1,2,3,6,7 | Approx 0.6kg. 100mm case |
| MT100-XA4,5 | Approx 0.8kg. 100mm case |
Ordering Information |
| Product Code | IP In | Un | O/P | Range | Aux | Freq | Opt |
| MT100-XA4 | 400/5A | 400 | 0-20mA | 300kW | 120v | 50Hz |
Options |
| 1 | Non standard inputs / outputs as far as technically viable |
| 2 | A.C. Auxiliary in range 57.7 to 450 volts |
| 3 | Calibration at nominal Hz 35....450Hz |
| 4 | Calibration at temperature other than 23șC |
