MEDCAL ST three phase network analyzer

MEDCAL ST is an advanced three phase network analyser, specifically designed for power quality studies. It is extremely easy to configure and setup, with no external switches or settings. Covering the requirements of EN50160, it is the first three-phase monitor able to fully implement the recommendations of EN-50160 standard for fast voltage variations.

MEDCAL ST is available in two different configurations: the standard version is suitable for laboratory use or indoor installation. The IP-65 version is recommended whenever the instrument must be used outdoors or in extreme climatic conditions.

MEDCAL ST also includes an advanced transient detection capability on the voltage channels. The high resolution voltage waveform will be recorded whenever there is a voltage distortionon the instantaneous voltage. As an additional advantage, the RMS voltage profile can be stored whenever there is a RMS-related event: dip, voltage peak or fast voltage variation.

MEDCAL ST can store, under normal conditions, more than three months of recordings without external intervention. The absence of any mechanical elements makes the instrument extremely robust and reliable. The included USB interface and cable allows direct communication with a personal computer. As an option, it is possible to include an internal GSM/GPRS modem for remote operation of the instrument.

The instrument is designed for both laboratory and permanent installation, and is provided with both front (4-mm banana) and rear (screw-type) connectors. Wall-fixing accessories are also supplied. In the IP-65 version all the connectors are waterproof and sealed.

With every MEDCAL ST three phase network analyzer a copy of MEDCALScope PC software is included at no additional cost. MEDCALScope allows a complete and exhaustive analysis of recorded data. It is possible to save the recorded data for later use, and export the data to other computer applications, as well as check compliance with power quality standards.


MEDCAL ST Three Phase Network Analyzer Specifications

Measured parameters
  • RMS Voltage and Current: maximum, average and minimum values.
  • Power: Active, Apparent and Reactive/Non-Active. Maximum, average and minimum for every interval.
  • Voltage dips and swells. In addition to voltage level and duration of the dip/swell, MEDCAL ST can record the RMS voltage profile during the event.
  • Transient waveforms.
  • Flicker: PST and PLT.
  • Voltage and Current harmonics: up to 50th.
  • Total Harmonic Distortion (THD).
  • Unbalance.
  • Fundamental frequency: Nominal frequency from 50 to 60Hz. Measuring ranges from 48.5 to 51.5Hz, and 58.5 to 61.5Hz.
  • Nominal voltage range from 110 to 480V.
  • From 10 to 3000A, depending on the employed current clamps.
Power supply
  • From 100 to 230V (AC or DC).
  • Maximum power consumption: 5W.
Recording capacity
  • 4 Mbytes flash memory, equivalent to 650.000 recordings. Enough for 3 months of continuous measurement under normal conditions (10 minutes averaging interval).
  • The memory can be configured as linear or circular storage.
  • Adjustable averaging period from 1 second to 30 minutes.
  • Optoisolated high-speed USB interface. USB 1.1 and 2.0 compatible.
  • Optional internal GSM modem.
Dimensions and weight
  • 220 x 145 x 50 mm
  • 450gr.
Operational conditions
  • Temperature: -10 to 55ºC
  • Humidity: < 90%
  • 600V CAT III / 300V Cat IV
  • Pollution degree 2
  • Double isolation
  • IEC/EN 61010-1
Internal real time clock
  • Powered by a rechargeable Lithium-ion battery.
  • Precision: deviation lower than 2sec/day.