7-7
Table 7.4 Meters for Measurement of Main Circuit
Item
Input (primary) side
Output (secondary) side
DC link bus
voltage
(P (+)-N (-))
W
avefor
m
Voltage
Current
Voltage
Current
Name of
meter
Ammeter
A
R
, A
S
, A
T
Voltmeter
V
R
, V
S
, V
T
Wattmeter
W
R
, W
T
Ammeter
A
U
, A
V
, A
W
Voltmeter
V
U
, V
V
, V
W
Wattmeter
W
U
, W
W
DC voltmeter
V
T
ype of
meter
Moving iron
type
Rectifier or
moving iron
type
Digital
AC power
meter
Digital AC
power meter
Digital AC
power meter
Digital AC
power meter
Moving coil
type
Symbol o
f
meter
⎯
⎯
⎯
⎯
It is not recommended that meters other than a digital AC power meter be used for
measuring the output voltage or output current since they may cause larger
measurement errors or, in the worst case, they may be damaged.
Figure 7.1 Connection of Meters
Summary of Contents for FRENIC-Multi series
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