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Adding Common Mode Chokes
st
(1
Gen GP4 Classic Compressor
Only)
Common mode chokes are necessary to maintain
protection against bearing currents causing pre-mature
failure of the compressor bearings. With the removal of
the output inductor, common mode chokes are necessary.
The choke assembly encircles all current carrying
conductors between the drive and compressor (meaning
do not include ground conductors). Individual cores must
also be installed on the power conductors. Refer to the
schematic and image below. With removal of the output
inductor, the power conductors will be need to be spliced
together. Polaris electrical connectors are recommended
(Catalog No.: IT-250). Six (6) pieces are needed. There are
two conductors per phase.
Table 7.
Common mode chokes
Description
Common Mode Core
One (1) per circuit
Assembly
Individual Conductor
Five (5) per conductor
Core
Figure 9.
Output chokes locations
PART-SVN237B-EN
Quantity
Mnemonic
COR00252
COR00253
Figure 8.
Electrical schematic with output chokes
4C
,D
L1/R
5C
,D
L2/S
6C
,D
L3/T
GND
2A35
AUX POWER
AP+ (1)
1T1
AFD POWER
MODULE
AP- (2)
Sh (3)
Installation
1T16
Add
25A
3M1
T1/U
T1
M
26A
T2/V
T2
27A
T3/W
T3
28A
PE
DRIVE
GRN
PE
PANEL
GND
400A
401A
13
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