AMMETER

TM 9-6625-2803-14&P

3.0

AMMETER

TYPE - The Ammeter is of the moving iron type designed

3.1

for use with the current transformers contained in the Analyzer.

3.2

SCALES - The Ammeter has four full scale ampere ranges --

220, 110, 55 and 5.5 amps. The proper full scale value is

selected by connecting the load wires to the proper binding

posts.

3.3

PHASE SELECTION - The "Line Amps" switch is used to insert

(Neutral

the Ammeter into Phase A, Phase B, Phase C or Neutral.

is used for 30, 4-wire only).

3.4

POINTER LIFT - The Ammeter is equipped with a device to

lift the pointer from the zero position. This is controlled by

a knob on the front of the Ammeter. The pointer lifter is used

in determining motor starting currents. To do this, the pointer

is "lifted" to a position where it just barely moves when the

motor is started. This value of current so indicated is the

motor starting current.

ACCURACY - Ammeter indications, together with the trans-

3.5

former contained in the Analyzer, are correct within +/- 1% of

It reads RMS value of

the full scale value from 45 to 425Hz.

applied current.