17
Magtrol Model 6530 Three-Phase Power Analyzer
Chapter 3 – Installation/Configuration
SETUP
Magtrol 7500 Series Power Analyzer
SINGLE PHASE
TWO-WIRE LOAD
THREE-PHASE LOAD
WYE CONNECTED
THREE-PHASE LOAD
DELTA CONNECTED
LOW
LINE
LINE
HIGH
(LINE)
(LOAD)
(LINE 1)
(LOAD)
NEUTRAL
L3
L2
L1
1
3
MOV >
V
V
LINE TO LINE
V
V
MOV >
LINE TO LINE
LINE TO LINE
V
MOV >
V
(LINE 1)
(LOAD)
L3
L2
L1
MOV
MOV
MOV
MOV
MOV
MOV
MOV
Figure 3–7 Transient Voltage Suppression
3.2.4
c
ircuit
B
reakers
With the circuits described in
Section 3.3.1.1 - Hardware Connections
, use the 7500 remote voltage
sense by measuring the voltage at the load. This increases measurement accuracy by eliminating
line voltage drop from the power measurement. For safety, an overload circuit breaker removes
all load voltage during an over-current condition. The voltage sense lines are connected at the line
side of the circuit breaker to help prevent inductive transients from entering the 7500 as the circuit
breaker opens. Make sure that connections from the circuit breaker to the load are heavy conductors
and short as possible.
C
aution
:
i
f
a
CirCuit
breaker
is
useD
in
the
input
line
to
the
7500 ,
a
CirCuit
shoulD
be
useD
that
prevents
the
breaker
from
opening
until
after
the
loaD
siDe
breaker
has
openeD
. o
therwise
,
potentially
Damaging
inDuCtive
transients
Can
be
applieD
to
the
7500 .
D
amage
CauseD
by
these
transients
are
outsiDe
the
sCope
of
the
m
agtrol
w
arranty
.
