Damped capacitive dividers have high dynamic behavior and can be used for measurements of full, front, and tail chopped lightning impulses (LI), switching impulses (SI), and AC voltages. The dividers meet all requirements of IEC 60060-2 in particular those with respect to measuring accuracy and step response. The divider can also serve as a base load for the impulse voltage generator.
Depending on the voltage rating, the high voltage part of the dividers consists of one or several oil-filled capacitors which are housed in cylinders made from glass fiber reinforced epoxy resin. Above a certain rated lightning impulse voltage, the dividers are equipped with a toroidal high voltage electrode to guarantee corona-free operation. All voltage dividers are erected on a mobile base equipped with castors.
A secondary unit is fixed at the bottom of the divider & consists of a capacitor and a damping resistor of low inductance both arranged in a coaxial design. This unit can be easily exchanged and connects to the control and measuring system.
CS model dividers are ideal for LI up to 1000 kV, SI up to 750 kV, and AC up to 300 kV. CR model dividers are ideal for LI up to 4000 kV, SI up to 3300 kV, and AC up to 1000 kV. All models are designed to achieve an output voltage of 1400 V at rated LI voltage. Upon request the dividers can be supplied with other ratios or with an attenuator to match the input voltage of non-Haefely measuring devices.