Regeneration Protection - Parker Gemini GV Series Installation Manual

Connecting V Bus

Regeneration Protection

38
Gemini GV Hardware Installation Guide
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±
: Sharing the Power Bus (optional)
You can connect the power buses of Gemini GV-U3n/U6n/U12n/H40n drives in
parallel, through the V BUS+ and V BUS- terminals. With the buses connected in
parallel, regenerated energy from one drive will be used by the other drives. (Do
not connect GV-H20n drives in parallel to each other or to other Gemini drives.)
V BUS+ and V BUS- terminals are at hazardous voltages when power is applied to
the drive, and for up to 30 seconds after power is removed. Lower voltages may
still be present for several minutes after power is removed. Reinstall the clear
plastic terminal cover after you make connections.
Connect together only V BUS± terminals of drives that share the same fused AC
power source, as shown below.
GV-U3/U6/U12/H40*
VBUS+
VBUS–
L2/N
L1
Fuses
* Not shown: 3-phase
AC connections for
GV-H40
VAC
Sharing the Power Bus
If excess regenerated energy causes an overvoltage or regeneration fault, you can
connect the Gemini Power Dissipation Module (GPDM) to the drive's V BUS±
terminals. See Regeneration Protection below for connection instructions and
more information about the GPDM.
NOTE: Because the Gemini drive has a current inrush limiter, we recommend that
you do not add additional bus capacitance to V BUS+ and V BUS-.
The following sections describe regeneration protection for Gemini drives, and the
Gemini Power Dissipation Module.
WARNING
CAUTION
GV-U3/U6/U12/H40* GV-U3/U6/U12/H40*
VBUS+ VBUS+
VBUS– VBUS–
L2/N L2/N
L1 L1
Connect
to GPDM,
if necessary
Use a single point
safety earth