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2–6
Regenerative DC Bus Supply Operation
380-480VAC Power
Wiring
Sensitive Circuits
It is essential to define paths
through which high frequency
ground currents flow to ensure that
sensitive circuits do not share a
path with these currents. Control
and signal conductors should not
be run near or parallel to power
conductors.
TE (True Earth) Termination
The converter's TE terminals are
used for all control signal shields
internal to the 1336 REGEN
Converter and must be connected
to the converter's TE terminals by
a separate continuous lead.
D Frame
USE 75° C COPPER WIRE ONLY
PE (Power Earth) Termination
A safety ground is required by
code. This point must be
connected to adjacent building
steel or a floor ground rod
provided grounding points comply
with NEC and local regulations.
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Grounding
All 1336 REGEN components must be connected to system
ground at the PE power ground terminal provided. Ground
impedance must conform to the requirements of national and local
industrial safety regulations (NEC, VDE 0160, BSI, etc.), and
should be inspected and tested at appropriate intervals. In any
cabinet, a single low-impedance ground point or ground bus bar
should be used. All circuits should be grounded independently and
directly. The AC supply ground conductor should also be
connected directly to this ground point or bus bar.
Conduit/4-Wire Cable
Nearest
Building Structure Steel
1
1
PE
PE
TE
DC+
DC–
R2
S2
T2
TORQUE TERM. TO 6 N-m (52 lb-in)
(2) jumpers connect PE and TE at the 1336 REGEN
1
Converter Main Terminal Block. Consult
Allen-Bradley Application Engineering prior
to removing either jumper.
Figure 2.3 — Regenerative DC Bus Supply Grounding
R
R
R
IN
OUT
Power
S
S
S
IN
Line Filter
OUT
T
T
T
OUT
IN
PE
GND
TB1-1
GND
TB1-3
USER
SUPPLIED
120V AC
120 RTN
120V AC
1
COMMON BUS
DRIVE
PE
COMMON BUS
DRIVE
PE
1336 REGEN
Precharge
R1
S1
T1
PE
GND
R1
S1
T1
1321 10%
Line Reactor
R2
S2
T2
GND
PE
R2
S2
T2
1336 REGEN
Converter
PE
TE
+DC
–DC
PE
–DC
+DC
PE
–DC
+DC
PE
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