ABB 5HK Series - Dielectric Tests; Troubleshooting Guide; Control Device Electrical Characteristics

Aim
MWIP
IB
6.2
.
1.7
D
Page
11
ASEA
BROWN BOVERI
5.13
DIELECTRIC
TESTS
If
it
is desired
to
make
dielectric
tests
during
maintenance
periods
,
the
following
test
values
should be used
.
These
are
to
be
applied
for
a one
-
minute
period
.
TABLE
3
DIELECTRIC
TEST VALUES
5.15
ELECTRICAL
CHARACTERISTICS
OF
CONTROL
DEVICES
For
operating
voltage
ranges
for
various
nominal control
voltages
refer
to
Table
4
,
Operating
Voltage Ranges
.
For
average
current
values
at
various nominal
control
voltages
,
referto
Table
5
,
Average
Current
Values
.
Current
values
given
in
this
table
are
average
,
steady
-
state
values
and
momentary
inrush
currents
for
all
charging
motors
and
AC
coils
are
approximately
six
to
eight
times these
values
.
Circuit
60
Hz
Primary
Ciruit
11.5
kV
‘
Secondary
Circuit
1100
V
"
It
is
necessary
that the
changing
motor
be
disconnected
for
this
test
by
turning
the
motor
disconnect
switch
to
the
"
OFF
"
position
.
If
a
test
is desired
on
the
motor
,
then the
motor
disconnect
switch
should
be
turned
to
the
"
ON
"
position
and the circuit
retested
at
540
V
,
60
Hz
.
TABLE
4
OPERATING
VOLTAGE
RANGE
Undervoltage
Spring
Charging
Motor
Nominal
Control
Voltage
Close
Pick
up
Maximum
Trip
Coil
DropOut
Coil
18
-
28
35
-
50
90
-
130
180
-
260
95
-
125
190
-
250
7
-
14
24
Vdc
48
V
dc
125
Vdc
250
Vdc
115
V
dc
230
Vdc
21
14
-
30
28
-
60
70
-
140
140
-
280
*
95
-
125
*
190
-
250
35
-
50
90
-
130
180
-
260
95
-
125
190
-
250
15
-
29
38
-
75
75
-
150
34
-
69
69
-
138
41
5.14
TROUBLESHOOTING
The
following
chart lists
typical
problems
,
their
causes
and
corrective
action
required
to
remedy
the
malfunction
.
TROUBLESHOOTING
CHART
106
212
97
195
Problem
Breaker
Fails
to
Close
Probable
Cause Corrective
Action
Low
or
Incorrect
Control
Voltage
Adjust
to
proper
Level
Closing
Springs
Not
Charged
Control
Relay
Limit
switch
out
of
Adjustment
Adjust
per
section
5.10
TABLE
5
AVERAGE CURRENT
VALUES
Breaker
is
not
Racked
into
Test
or
Connected
Position
Turn
operating
crank clockwise until
lever is locked into
the
desired
position
Nominal
Control
Voltage
Spring
Charging
Motor
Trip
Lockout
Close
Under
-
Voltage
N
.
E
.
C
.
Fuse
Coil Coil
Coil
Latch
Check
Switch
not
Making
(
When
Supplied
)
Adjust
per
Section
5.9
24
Vdc
48
V
dc
125
Vdc
250
Vdc
115
Vdc
230
Vdc
0.30
22.0
22.0
0.9
30
10.7
0.15
25.0
10.7 0.5
30
Auxiliary
Switch
t
)
"
Contact
not
making
Determine
cause
and
0.06 5.0
10.0
5.0
0.2
30
0.03
2.2
5.0
2.2
0.1
30
*
4.5
0.40
10.0
4.5
02
30
Racking
Release Lever
Linkage
not
property
adjusted
Adjust
per
section
5.11
*
2.3
0.20
5.0
2.3
0.1
30
Excessive
Friction
Insufficient
or
contaminated
lubrication
(
see
section
5.12
)
*
Alternating
current
is
never
recommended because
the
control
power
is
affected
by
the
power
system
that
it
is
protecting
.
A
sufficient
reduction
in
control
power
during
a
heavy
fault
condition could
prevent
the
HK
circuit
breaker
from
opening
,
leading
to
loss
of
total load and
/
or
equipment
damage
.
"
Y
“
Contact
not
Making
*
Defective
"
Y
"
coil
curcuit
Undervoltage
not
operating
(
When
Supplied
)
Low
or
improper
Voltage
applied
Defective
Close
Coil
Assembly
Replace
close
coil
assembly
Breaker
Faite
to
Low
or
Incorrect
Control
Voltage
Adjust
to
proper
level
Trip
Auxiliary
Switch
“
a
"
Contact
not
Making
Determine
cause
and
repair
Section
6
.
ELECTRICAL
OPERATING
SEQUENCE
Please
refer
to
the
specific
schematic
diagrams
and
other
operational
information furnished
with
your
order
.
Figure
8
is
provided
as a
typical
schematic
for
general
information
on
electrical
operation
with
dc
closing
.
Figure
9
is
provided
as a
typical
schematic
for
general
information
on
electrical
operation
for
HK
breakers
with
ac
closing
.
The
following
is the
sequence
of
electrical
opera
-
tion
with
ac
closing
.
Defective
Trip
Coil
Assembly
Replace trip
coil
Assembly
Excessive Friction
Insufficient
or
Contaminated
Lubrication
(
See
Sec
.
5.12
)
*
Caution
-
Improper
"
Y
”
circuit
operation
could
permit
the
breaker
to
pump
to
destruction
.
Courtesy of NationalSwitchgear.com