CHAPTER 5: SETTINGS
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
5–57
(EQ 5.5)
(EQ 5.6)
where: TC
used
= thermal capacity used
TC
used_start
= TC
used
value caused by overload condition
TC
used_end
= TC
used
value dictated by the hot/cold safe stall ratio when
the motor is running (= 0 when the motor is stopped)
t
= time in minutes
τ
= Cool Time Constant (running or stopped)
I
eq
= equivalent motor heating current
ol_pkp
= overload pickup settings as a multiple of FLA
hot / cold
= hot/cold safe stall ratio
FIGURE 5–15: Thermal Model Cooling
Hot/Cold Safe Stall Ratio
The motor manufacturer may provide thermal limit information for a hot/cold motor. The
469 thermal model adapts for these conditions if the
HOT/COLD SAFE STALL RATIO
settings
is programmed. This settings value dictates the level of thermal capacity used the relay will
settle at for current levels below the
OVERLOAD PICKUP LEVEL
. When the motor is running
TC
used
TC
used_start
TC
used_end
–
(
)
e
t
τ
⁄
–
(
)
TC
used_end
+
=
TC
used_end
I
eq
ol_pkp
----------------
1
hot
cold
----------
–
100%
×
=
808
7
05A2.CDR
0
25
50
7
5
100
0
30
60
90
120
150
180
Time in Minutes
T
h
er
m
a
l
C
ap
a
c
it
y
U
s
e
d
C
oo
l
T
i
me
C
onstant
= 15
m
i
n
T
C
used
_
start
= 85%
H
ot/
C
o
l
d
R
at
i
o
= 80%
I
eq/Over
l
oad P
i
c
k
up
= 100%
0
25
50
7
5
100
0
30
60
9
0
120
150
180
Time in Minutes
T
h
e
rm
al
C
a
p
a
ci
ty
U
s
ed
C
oo
l
T
i
me
C
onstant
= 15
m
i
n
T
C
used
_
start
= 85%
H
ot/
C
o
l
d
R
at
i
o
= 80%
I
eq/Over
l
oad P
i
c
k
up
= 80%
0
25
50
7
5
100
0
30
60
9
0
120
150
180
Time in Minutes
T
h
e
rm
al
C
a
p
a
ci
ty
U
s
ed
C
oo
l
T
i
me
C
onstant
= 30
m
i
n
T
C
used
_
start
= 85%
H
ot/
C
o
l
d
R
at
i
o
= 80%
Motor Stopped after runn
i
ng
R
ated Load
T
C
used
_
end
= 0%
0
25
50
7
5
100
0
30
60
9
0
120
150
180
Time in Minutes
T
h
e
rm
al
C
a
p
a
ci
ty
U
s
ed
C
oo
l
T
i
me
C
onstant
= 30
m
i
n
T
C
used
_
start
= 100%
H
ot/
C
o
l
d
R
at
i
o
= 80%
Motor Over
l
oad
T
C
used
_
end
= 0%
MOTOR TRIPPED
100% LOAD
MOTOR STOPPED
80% LOAD
Содержание Masoneilan 469 Series
Страница 4: ......
Страница 91: ...CHAPTER 3 INSTALLATION 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL 3 27 3 2 14 2 Speed Motor Wiring ...
Страница 92: ...3 28 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 3 INSTALLATION ...
Страница 256: ...5 112 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 5 SETTINGS ...
Страница 298: ...6 42 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 6 ACTUAL VALUES ...
Страница 300: ...7 2 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 7 TESTING FIGURE 7 1 Secondary Injection Test Setup ...
Страница 319: ...CHAPTER 8 APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL 8 7 HGF5C 808841A1 HGF8 808842A1 ...
Страница 321: ...CHAPTER 8 APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL 8 9 808712A1 CDR ...
Страница 330: ...8 18 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 8 APPENDIX ...