HST
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HST Wideband Precision High Voltage Divider Very suitable for wideband power measurement at medium voltage inverters, HV discharge lamps, ultrasonic and plasma generators Rear side with high voltage input leads Precise measurement up to 20 kV peak voltage Negligible phase error One-, two- and three-phase version avalaible Difference measuring of floating voltages

Precision High Voltage Dividers for Precision Power Meters The wideband precision high voltage divider of series HST expand the voltage measuring range of ZES ZIMMER precision power meters LMG for use at nominal voltages over 1000 V. The high voltage inputs are equipped with 2 m leads that are attached to the voltage measured against earth. The open leads can be finished by the customer. The HST3 (resp. HST6/9/12) divides DC, AC or any distorted voltages with very high accuracy by the factor 1000 (resp. 2000 / 3000 / 4000). The divided voltage is available at the buffered low impedance BNC...

Wiring of 3-phase HST in 3-phase systems 3-phase system (e.g. medium voltage frequency inverter) U30 High voltage fuses with high breaking capacity with nominal current ≤ 1 A, designed for voltage transformer protection. Installation nearby HV line. Connection to power meter with star-delta conversion: (U∆ I* → U* I* or U∆ I∆) Surge arresters for limitation of transient overvoltage to the value admissible for HST. Installation of HST inside the high voltage switchgear. Up to 100 m shielded wire, shield not connected to the LMG, but only to the protective earth terminal of the HST....

Technical Data Series no. of channels ordering type maximum sine trms voltage for full scale maximum trms input voltage maximum peak voltage for full scale input impedance Nominal electrical rating dividing ratio of measuring inputs measuring accuracy dividing ratio phase error output burden maximum trms voltage* Overvoltage capability of high voltage input against earthed case *) voltages in accordance to EN 61010:2010, valid for max. altitude 2000 m over sea level maximum periodic peak voltage* maximum transient overvoltage* non-repetitive maximum peak voltage* measurement input signal...