3 8
Bas
i
c app
li
cat
i
on
D
i
sadvantages
The aux
ili
ary supp
li
es are de-energ
i
sed by the ma
i
n contactor. Th
i
s causes a turn on
de
l
ay of approx
i
mate
l
y 0.7 5 secs w h
il
e the synchron
i
sat
i
on c
i
rcu
i
ts estab
li
sh a
l
ock onto the supp
l
y pr
i
or to
the app
li
cat
i
on of po w er to the motor. A
l
so the f
i
e
l
d cannot rema
i
n energ
i
sed after contactor drop out w h
i
ch
proh
i
b
i
ts dynam
i
c brak
i
ng and/or condensat
i
on prevent
i
on
i
n standby f
i
e
l
d mode.
4.3.3 Ma
i
n contactor
i
so
l
at
i
ng D C armature
A dvantages
The aux
ili
ary supp
li
es are permanent
l
y energ
i
sed. Th
i
s a
ll
o w s the synchron
i
sat
i
on
c
i
rcu
i
ts to
l
ock onto the supp
l
y pr
i
or to the app
li
cat
i
on of po w er to the motor. Th
i
s resu
l
ts
i
n a fast re
l
ease of
current to the armature because
i
t avo
i
ds the synchron
i
sat
i
on de
l
ay. A
l
so the f
i
e
l
d can rema
i
n energ
i
sed after
contactor drop out a
ll
o w
i
ng dynam
i
c brak
i
ng and/or condensat
i
on prevent
i
on
i
n standby f
i
e
l
d mode.
D
i
sadvantages
The f
i
e
l
d w
i
nd
i
ng
i
s not e
l
ectromechan
i
ca
ll
y
i
so
l
ated by the ma
i
n contactor, w h
i
ch
may contravene safety codes w
i
thout add
i
t
i
ona
l
measures. The f
i
e
l
d standby
l
eve
l
may not be set to a
l
o w
enough
l
eve
l
by the user and cou
l
d cause overheat
i
ng of the f
i
e
l
d w
i
nd
i
ng.
The A C supp
l
y
i
s permanent
l
y connected to the PL/X un
l
ess further prov
i
s
i
on
i
s made to
i
so
l
ate the supp
li
es.
Not
e
. Th
e
a
r
m
a
tu
r
e
must b
e
c
onn
ec
t
e
d to th
e
r
e
mot
e
s
e
ns
e
t
e
r
m
i
n
a
l
s T41
a
nd T43. Th
i
s
e
nsu
r
e
s th
a
t th
e
PL
/X
ca
n m
ea
su
r
e
th
e
a
r
m
a
tu
r
e
vo
l
t
a
g
e
e
v
e
n wh
e
n th
e
c
ont
ac
to
r
i
s op
e
n.
I
t
i
s d
a
ng
e
r
ous to ut
ili
s
e
a
DC
c
ont
ac
to
r
wh
e
n f
i
e
l
d w
eake
n
i
ng
i
s
e
mp
l
oy
e
d w
i
thout
a
l
so
c
onn
ec
t
i
ng T41
a
nd T43 to th
e
moto
r
a
r
m
a
tu
r
e
.
See a
l
so 6.5 C H A N GE P A RA ME TERS / ST OP M O DE RA MP and 6.5.1. 1 B
T 4 1 + T 4 3 -
A V sens
i
ng
i
nputs
on
l
y used w
i
th D C
s
i
de contactors
L
i
ne
reactor
L1
L2
L3
EL1
EL2
EL3
Ma
i
n
Contactor
W
i
th aux
contact
F-
F +
A ux
ili
ary
Fuses
Motor
F
i
e
l
d
Ma
i
n
Fuses
A +
A-
Motor
Arm
D C Sem
i
conductor fuse for
regenerat
i
ve app
li
cat
i
ons
W
i
re the aux
ili
ary N/O contact
i
n ser
i
es
w
i
th RUN (T 3 1) and + 2 4 V (T 3 5)
Содержание PLX
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