HST Precision Wideband High Voltage Divider

The wide band precision high voltage divider of series HST expand the voltage measuring range of ZES ZIMMER precision power meter LMG for use at power grid of nominal voltage over 1000V. The high voltage inputs are equipped with 2m leads that is attached to the voltage measured against earth. The open leads can be aligned by the customer. The HST 3 (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 output. To avoid noise interference it is recommended to use shielded cables to the measuring input of the LMG. The HST can be delivered in one, two or three channel version as to match the particular measuring task.

The single phase HST is used in single ended systems (e.g. overhead traction line, ultrasonic applications).
Line to line voltages can be measured as difference between the output signals of the channels. For floating (difference) voltage measuring therewith the 2-phase HST is best suitable.

Typical Applications

For use at power grids of nominal voltages more than 1000V. Measurements e. g. at overhead traction lines or ultrasonic applications. Optimum for inverters at medium voltage (frequency inverters fed medium voltage drives) and power quality analysis at the distribution network.

Summary

• Precise measurement of high voltages up to 30kV
• DC to 300kHz bandwidth
• High resistivity against transient voltages
• One-, two- and three-phase version
• Line to line voltage as difference at outputs
• Negligible phase error, therefore very suitable for wideband power measuring