Overview: The document describes the Precision Wideband High Voltage Divider Series HST, designed for precise measurement of high voltages up to 20kV, suitable for DC to 300kHz applications. It is optimal for use with inverters at medium voltage and offers high transient voltage resistivity with negligible phase error, making it ideal for wideband power measuring.

Specifications: The HST series includes models HST3, HST6, HST9, and HST12, each available in one, two, or three-phase versions. Key specifications include:

• Max. trms input: 4.2kV to 16.8kV
• Max. peak value for full scale: 5kV to 20kV
• Overvoltage capabilities in accordance with EN61010:2001
• Input impedance varies from 10MOhms||50pF to 40MOhms||20pF
• Dividing ratio from 1/1000 to 1/4000
• Uncertainty for voltage measurement ranges from ±0.1% to ±0.3% depending on frequency
• Uncertainty for active power measurement ranges from ±0.08% to ±3%

Design and Safety: The device features a robust aluminum case with IP54 protection and operates within a temperature range of 0 to 50°C. It requires a supply of 85 to 265V and 45 to 65Hz. Safety is ensured by connecting the earth terminal of the enclosure to an appropriate earthing point, considering the possible short circuit current.

Applications: The HST series is suitable for various applications, including single-ended systems, floating voltage measurements, and three-phase systems like frequency inverter-fed medium voltage drives and power quality analysis at distribution networks.

Recommendations: To avoid noise interference, it is recommended to use shielded cables for the measuring input. The HST can be configured in one, two, or three-channel versions to match specific measuring tasks.