4861

High Precision Standard Electronic Voltage Dividers

The 4860 series (measuring unit and highly accurate HV divider combining compressed gas and air capacitors). 

High precision standard voltage divider is used as a  comparison standard in the differential method (bridge) measurement of high voltage instrument transformers. 

The special active guard controlled design of this divider set results in unmatched, high accuracy. 

The high voltage divider unit comprises a capacitive high voltage divider (compressed gas standard capacitor C1 and air capacitor C2) 

and an electronic device in series, combine to form a variable electronic divider. 

Capacitive voltage divider C1/C2 divides the primary voltage Uprim to voltage U1, which is matched by the electronic device to the required secondary voltage Usec. 
Voltage instrument transformers of less than 1 kV primary rated voltage can be connected directly to the electronic device via the adaptor box supplied with the divider. 

* Features

 · Universal comparison standard for any instrument transformer ratio within a wide range of voltages

 · Very accurate voltage divider ratio (±50 ppm, ±0.1 min)

 · Max. measurement voltage is dependent only on voltage rating of compressed gas capacitors

 · Electronic divider can be used directly for voltages below 1000 V, without needing a high voltage standard capacitor

 · Suitable for all Tettex (2767, 2765, 2711/22 and 2711/23) and many other manufacturers’ instrument transformer test sets (bridges)

 · Direct replacement of earlier series 4850

 · Existing compressed gas capacitors can generally be adapted to build a complete divider system

 · The complete system is certifiable

 · Remote control possibility via IEEE 488 or RS 232C interfaces

 · Technical solution based on a capacitive high voltage divider unit