GE Industrial Solutions AF-300C AC Drive User Manual
Page 38
Figure 4-7. GROUND CONNECTIONS
GROUND TERMINAL CONNECTIONS
CONTROL CIRCUIT WIRING
It is necessary to provide grounding in order to pro-
tect against an electral shock due to leakage and to
reduce the effects of electrical ‘noise”. (See Figure
Preferably, each inverter or other piece of equipment
should be grounded individually. If this is not pos-
sible, the alternative method is common grounding
where the ground wire from each piece of equipment
is connected at the ground point.
NOTE: The ground wire
be as large a gauge
as possible and the length should be kept as
as
possible.
Avoid grounding method where the ground wire is
used in common with other equipment i.e., do not
daisv chain around connections.
INVERTER CONTROL
CIRCUIT WIRING
I
C
I
R
C
U
I
T
W
I
R
I
N
G
CROSS AT RIGHT
ANGLE AND KEEP
KEEP NOT LESS
AT LEAST 1 INCH
Figure 4-8. CONTROL WIRE ROUTING
Perform all control wiring in accordance with the
following applicable subparagraphs (and referenced
Figures) and the applicable circuit as shown in Fig-
ures 4-15 to 4-26 (located at the end of this Section).
Refer to TABLE 2for terminal descriptions and TABLE
3 for wire sizing.
CAUTION:
reliabilitv contacts for lowvoltaqe
and current sianals must be used on the control
circuit terminals (FWD, REV, BX, THR,
PU, IL,
X2. X3,
, RT2,
When the contact is open,
the voltage is approximatelv
when the
contact is closed, the current is approximatelv 3
DC (see
4-12 for circuit).
CAUTION:
The control circuit terminal wirina should
be kept as far
as possible from the main power
wirinn to prevent operational error due to noise inter-
ference. Never install both
of wirinq in the same
duct or conduit. (A separation distance of 10 centi-
meters
inches1 or more is recommended.) If the
control circuit wirina must cross the main power
inn, it should cross at a riaht
and be seperated
at least
4-8).
CAUTION:
Use shielded twisted wire for the con-
trol circuit wirina; wirinn should be as short as
i.e. 20 meters
feet) or less. Connect shield
to the
terminal and leave the other
end open and
insulated.
CAUTION:
a suppressor in parallel with any
or
coils, etc. that mav be close to
the inverter.
4-6