MEDVAN 40 Portable Three-phase Network Medium Voltage Circuit Analyser
Features
Current Transformers burden testing
Real-time vector diagrams and network analysis
Simultaneous meter testing at primary and secondary circuits
Software calculation of the error of the entire measuring circuit – electricity meter + current transformer + voltage transformer
Application and Brief Description
The Medium Voltage Circuit Analyser was designed for a quick analysis of electricity meters measuring circuits without necessity of any disconnections. Both the primary and the secondary of the transformer can be simultaneously analysed, for which, along with the current clamps for 100 A and 100 A, high voltage current and voltage sensors, all electronically compensated, are provided with the instrument.
The meter’s error is calculated with the help of a scanning head. The instrument measures simultaneously three voltages, three primary and three secondary currents, and can calculate the error of the meter self, as well as the error of the entire measuring system meter + instrument transformers. Furthermore, the turn ratios of the voltage and current transformers can be measured and their error can be calculated. The circuit analysis includes also real time drawing of the phasor diagram, indication of powers, power factor, harmonic contents, etc. All the measurements quoted are memorized in a non-volatile memory of 100 measurement sites capacity, and can be recalled or transferred to a computer by means of a USB.
Standard Equipment
MEDVAN main unit
3 flexible primary current probes up to 2000 A (0.6 kV)
1 or 3 high voltage optical current probes up to 2000 A (100 kV)
1 or 3 high voltage optical voltage probes 0.2 kV ÷ 20 kV
3 secondary current clamps up to 100 A
1 test plug
4 voltage leads with alligator clips
1 scanning head
1 hand switch for manual testing
1 carrying case
1 Li-Ion battery pack and charger kit
Technical Data
| Power Supply | Auxiliary 70 V ÷ 275 V |
| Dimensions | XxXxX |
| Weight | 5 kg approx. |
| Housing | plastic |
| Operation Temperature | -10℃ ÷ 60℃ |
| Pulse Output | 100 000 imp/kWh (kVarh) |
| Graphic, back lit, LCD display | 320 x 240 pixels |
| Memory | 100 tests memorized |
| Voltage / Current Inputs | |
| Voltage Inputs | 3 channels, 10 ÷ 600 Vrms (plus neutral) |
| 3 channels for HV voltage probes – 0.2 ÷ 40 kV | |
| Current Inputs | 3 channels for flexible probes (2000 A, 0.6 kV) |
| Or for HV current probes (2000 A, 40 kV) | |
| 3 channels for current clamps (120 A, 0.6 kV) | |
| <1 channel for test plugs (10 A, direct)/td> |
| ERROR | RANGE | |
| Voltage (secondary) | ±0.1% | 50.0 V ÷ 300 V |
| Voltage (primary) | ±0.5% | 0.4 kV ÷ 40 kV |
| Current (secondary) | ±0.2% | 0.5 A ÷ 120 A |
| Current (primary) | ±0.5% | 50 A ÷ 2000 A |
| Energy | ±0.5% (typical) | KWh, kVARh, kVAh |
| Ratio test | ±0.2% typical; | VT, CT |
| Phase shift | ±0.1° | 0° ÷ 359.9° |