4861
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.
![4861 - High Precision Standard Electronic Voltage Dividers](/fileadmin/_processed_/3/8/csm_4861_-_High_Precision__Standard_Electronic_Voltage_Dividers_-_HAEFELY_-_1_0fa3de81db.png)
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.
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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 1000V, 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