A kilovoltmeter is an indispensable instrument for accurately measuring voltage and current in high voltage applications. High voltage measurements are done by connecting a specialized voltmeter to the secondary unit of a voltage divider or to a current to voltage transducer, such as a shunt.
Haefely has now introduced two new and modern solutions – the DMI 552 laboratory-optimized version or DMI 553 portable, battery-operated version. The DMI 552 / 553 have been developed to measure, record, and visualize events during dielectric and breakdown tests in high voltage applications according to IEC 61083-3:2020.
Measured values are shown as large digits on the computer screen using the Haefely CaMS software. In addition, for pass/fail criteria during dielectric tests, Peak by √2 voltage is recorded and last value before breakdown is shown. Graphical indications as scope function, FFT, datalogger or flash detection are included. To facilitate easy comprehension, voltage divider ratio or shunt conversion factor (A/V) can be incorporated in the calculation to display parameters directly in kV or A. Fiber optic connection guarantees galvanic isolation between the operator and high voltage test lab, increasing safety.
The DMI 552 and 553 can generate reports based on templates, which can be printed or saved as a PDF. Snapshots of the display or charts can be easily included in the reports.
Brochure:
Datasheets:
DMI 552 / 553 Kilovoltmeter Instrument Features
Designed to measure voltage and current in high voltage applications
Measures AC voltage and currents as RMS, Peak, and Peak/√2, among others
Measures DC voltage and currents as Mean, Peak, and Ripple
Flash detection with voltage indication
Real time scope and frequency analysis FFT
Additional AC/DC input channel (optional)
Computer controlled with Haefely CaMS graphical user interface
Optically decoupled from computer
Compact, reliable, and EMC hardened design, IP50
DMI 553 is battery-operated and delivered in a convenient transport case
Tehnical Data
| Measured Values Voltage & Current¹ | |
|---|---|
| AC - Amplitude | ±Peak, ±Peak/√2, RMSfund, PeakAVG, RM, RMCorr, Mean, Peak Factor, Rate of Rise |
| AC - Frequency | Fundamental frequency |
| AC - Harmonics | 1…20th individual (Amplitude, Phase, Ratio), THC, THD |
| AC - Peak-hold values | Peak Flash, RMS Flash, Rate of Rise Flash |
| DC - Amplitude | Mean, Ripple, fRipple, Peak, Rate of Rise |
| DC - Peak-hold values | Peak Flash, RMCorr Flash, Rate of Rise Flash |
| AC & DC Measurement | |
|---|---|
| Input voltage | 0…400 Vpk |
| Input impedance | 1 MΩ || 3 pF |
| Frequency | DC, 10…600 Hz (Fundamental), 20th Harmonic (12 kHz) |
| Accuracy | ±0.1 % of reading ±10 V |
| Averaging | selectable (100 ms…10 s) |
| Sampling rate | 48.8 kS/s |
| ADC resolution | 24 bits |
| Recording depth | 500 kPoints of data stream |
DMI 552 / 553 Standard Package
Digital Measuring System
- DMI 552 – Rugged
- DMI 553 – Portable
Software on USB stick
Fiber Optic – USB/Ethernet adapter (Fiber Link)
Fiber Optic Cable, 20 m
Battery (DMI 553)
Transport case (DMI 553)
Connection set (per channel)
Instruction Manual & Quick Start Guide
Optional Extended Warranty (2 or 3 years)
DMI 552 / 553 Accessories
|
9231 | The 9231 High Voltage Divider (25 ... 200 kV) have been specially developed for AC high voltage measurement. Includes a double base to allocate the measuring instrument. |
|---|---|
| 9241 | The 9241 High Voltage Divider (25 ... 200 kV) have been specially developed for AC & DC high voltage measurement. Includes a double base to allocate the measuring instrument. |
| SEK463 | Secondary unit for AC & DC measurement. 140V output voltage. Other voltages on request. |