WATT/VAR METER

TM 9-6625-2803-14&P

WATT/VAR METER

4.0

4.1

TYPE - The Watt/Var Meter is of the transducer type,

designed for operation with three-phase, four-wire circuits,

as well as two and three-wire single phase circuits.

4.2

SCALES - The Watt/Var Meter has a range of 0 to 1.2KW/KVAR,

corresponding to the 3-phase range on the 5.5A and 125V switch

positions.

Other ranges are obtained using internal or external

CT'S or PT's. The internal Potential Transformers are connected

to the "Select Power - Set - Range" switch. The CT inputs

are to the A, B and C load binding posts which are marked

with the current range. Use the full scale switch voltage and

the value of current determined from the binding posts to

determine the scale multiplier printed on the face of the

KW/KVAP Meter. Multiply the meter readings by this multiplier

(Note:

For single-phase, three-

to obtain correct KW/KVAR.

wire , the indication is half of the actual value).

4.3

KW/KVAR READINGS - EXAMPLE:

If the voltage setting is 250

on BOTH switches, and the load wires are in the 50A binding

posts, the scale multiplier is 20.

If the scale reading is .80,

then the power is .80 x 20 = 16KW, if the "Select Power" switch

is set on "3", or if the "Select Power" switch is set on lead

or lag KVAR, the indication is 16KVAR.

4.4

ACCURACY - The Watt/Var Meter indication is accurate

to 2% of full scale on any frequency from 45 to 425Hz.

4.5

CAUTION - Set the "Select Power - Set - Range" voltage

switch higher than the actual phase to phase voltage as read on

the Voltmeter, or damage can result. Observe maximum current

ratings in connecting to load terminals.