The 3370 is a series of SF6 insulated, highly stable capacitors and is used together with a power factor / tan d measuring instrument as a comparison...
The 3730 is a compactly designed 12 kV SF6 reference capacitor with seven calibrated, manually selectable values of tan delta (power factors) A fast...
The HAEFELY 3320 standard air capacitors are especially built for high accuracy dissipation factor (tan d) measurements or for calibrating measuring...