Catalog ID: 4860
The 4860 series (control unit and capacitive HV divider with compressed gas and air caps) high precision standard voltage divider is used as a variable 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 highest accuracy. This standard voltage divider is ideal for integration with the 2767 or 2769 test set in a full remote controlled instrument voltage transformer test system.High Voltage Divider Unit 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, constituting a variable electronic divider (see system diagram). Capacitive voltage divider C1/C2 divides the primary voltage Uprim to voltage U1, which the electronic device matches to the required secondary voltage Usec. Voltage instrument transformers of less than 1 kV primary voltage can be connected directly to the electronic system via the adapter box supplied with the divider.Electronic Device The main components of this system are an input amplifier and a guard-potential control (up to 1010 V), an electronic divider and a power amplifier with the output stage. The instrument is protected against setting errors, over voltages and short-circuits. Errors message are indicated on the dot matrix display.