Resistive Capacitive Voltage Divider ROF highvoltage

Resistive Capacitive Voltage Divider ROF highvoltage

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Resistive Capacitive Voltage Divider ROF highvoltage,
Resistive capacitive voltage dividers type ROF (RC divider) are used in high-voltage networks within the 72.5-550 kV range.
They divide the primary voltage into a standardised,
equivalent secondary voltage for meters,
measuring and protection devices.

Features

  • Ferroresonance-free and no saturation effects
  • Secondary output can be operated under short-circuit or no-load conditions
  • AC and DC accuracy class ±0.1% @fR
  • Measurement of harmonics possible up to 1 MHz
  • Transient signals can be measured
  • Accuracy with harmonics up to 10 kHz of ±0.2

Type ROF

72

123

145

170

245

362

420

550
Standard IEC / IEEE
Highest voltage for equipment kV 72.5 123 145 170 245 362 420 550
Rated power-frequency withstand voltage kV 140 230 275 325 460 510 630 680
Rated lightning impulse withstand voltage kV 325 550 650 750 1050 1175 1425 1550
Frequency Hz 16.7 / 50 / 60
Accuracy class 0.1; 0.2; 0.5; 1.0; 3.0
Expanded frequency band Hz 15 – 10000
Burden R or R//C
Burden range ≥ 100 kΩ
Rated voltage factors 1.5 – 30 sec / 1.9 – 30 sec / 1.9 – 8 h

Type ROF

72

123

145

170

245

362

420

550
Height of unit* A mm 1306 1606 1806 2006 2606 3371 3771 4571
Height to primary terminal* B mm 1186 1486 1686 1886 2486 3491 3891 4691
Depth of unit including terminal box C mm 725 725 725 725 725 725 851 851
Depth of unit base D mm 500 500 500 500 500 500 650 650
Width of unit base E mm 500 500 500 500 500 500 700 700
Distance between screw holes at base F mm 450 450 450 450 450 450 600 600
Min. creepage distance*   mm 1340 1340 1950 3080 3900 4394 8250 10230
Approximate weight*   kg 220 220 230 285 295 300 830 800

 

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