Voltage measurement inputs

Inputs

Form 9: Va, Vb, Vc, Vref

Form 29 & 36: Va, Vc, Vref

Form 35: Vab, Vcb, Vref

Recommended wire gauge

5.26 mm² (10 AWG)

Nominal voltage

Form 9, 29 & 36: 57 to 277 V L-N rms (-20%,+25%)

Form 35: 100 to 480 V L-L rms (-20%,+25%)

Maximum voltage, auxiliary powered meters

Form 9, 29 & 36: 347 V L-N rms, 600 V L-L rms

35: 600 V L-L rms

Dielectric withstand

2500 V rms, 60 Hz for 1 minute

Rated impulse voltage

6 kV

Measurement / installation category

CAT III

Operating fundamental frequency range

42-69 Hz

Input impedance

5 MW per phase (phase to Vref)

Fuse (customer supplied)

2 A slow-blow (see wiring diagrams)