GE MicroVersaTripPlus AK-50 - Page 24

SECTION
8
TESTING
AND
TROUBLESHOOTING
Table
8
-
1
.
Resistance
Values
Resistance
in
Ohms
between
Common
and
Tap
Terminals
Breaker
Frame
Size
Ampere
Tap
FALSE
TRIPPING
BREAKERS
EQUIPPED
WITH
GROUND
FAULT
(
CONT
’
D
)
300 20
-
24
27
-
32
42
-
50
58
-
68
42
-
50
58
-
68
93
-
109
130
-
154
Step
4
.
On
ground
fault
breakers
serving
four
-
wire loads
,
check
that
the
neutral
sensor
is
properly
connected
.
See
cabling diagram
Fig
.
8
-
1
.
In
particular
,
the fol
-
lowing
:
400
600
AK
-
50
AKS
-
50
800
600
Verify
that
the
neutral
sensor
has the
same
rat
-
ing
and
tap
setting
as
the
phase
sensors
.
Check
continuity
between
the
neutral
sensor
and its
equipment
-
mounted
secondary
discon
-
nect
block
.
Also
check
for
continuity
from
the
breaker
-
mounted neutral
secondary
disconnect
block
through
to
the female harness
connector
.
If
the breaker
’
s
lowrer studs
connect
to
the
sup
-
ply
source
,
then the
neutral
sensor
must
have
its
load
end connected
to
the
source
.
See
Fig
.
8
-
1
.
Make
sure
that
the
neutral
conductor is
carrying
only
that
neutral
current
associated
with the
breaker
’
s
load
current
(
neutral
not
shared
with
other
loads
.
)
800
A
.
1200
B
.
1600
1200
20
-
24
28
-
34
37
-
44
61
-
72
AK
-
75
1600
2000
C
.
3000
1600
36
-
43
47
-
55
75
-
88
108
-
127
AK
-
100
2000
D
.
3000
4000
Step
5
.
If
the
preceding
steps
fail
to
identify
the
problem
,
then
measure
the
sensor
resistances
.
Since
the
phase
and neutral
sensors are
electrically
identical
,
their
resistance should
closely
agree
.
)
24
Courtesy of NationalSwitchgear.com