Figure 4-6 Size 2 Ground Connections; Figure 4-7 Size 3 Ground Connections - Emerson unidrive sp User Manual

Safety Product Mechanical
Information Information Installation
4.1.2 Ground connections
Electrochemical corrosion of grounding terminals
Ensure that grounding terminals are protected against
corrosion i.e. as could be caused by condensation.
WARNING
Size 0
On a size 0, the supply and motor ground connections are made using
an M6 screw at the top (supply) and bottom (motor) of the drive. See
Figure 4-1 on page 67.
Size 1
On a size 1, the supply and motor ground connections are made using
the studs located either side of the drive near the plug-in power
connector. Refer to Figure 4-2 on page 68.
Size 2
On a size 2, the supply and motor ground connections are made using
the grounding bridge that locates at the bottom of the drive. See Figure
4-6 for details.
Size 3
On a size 3, the supply and motor ground connections are made using
an M6 nut and bolt that locates in the fork protruding from the heatsink
between the AC supply and motor output terminals. See Figure 4-7 for
details.
Size 4, 5 and 6
On a size 4, 5 and 6, the supply and motor ground connections are
made using an M10 bolt at the top (supply) and bottom (motor) of the
drive. See Figure 4-8 on page 71.
The supply ground and motor ground connections to the drive are
connected internally by a copper conductor with a cross-sectional area
given below:
2 2
Size 4: 19.2mm (0.03in , or slightly bigger than 6 AWG)
2 2
Size 5: 60mm (0.09in , or slightly bigger than 1 AWG)
2 2
Size 6: 75mm (0.12in , or slightly bigger than 2/0 AWG)
This connection is sufficient to provide the ground (equipotential
bonding) connection for the motor circuit under the following conditions:
To standard
Supply phase conductors having cross-sectional area
not exceeding:
IEC 60204-1 &
Size 4: 38.4mm
EN 60204-1
Size 5: 120mm
Size 6: 150mm
Supply protection device rating not exceeding:
Size 4: 200A
NFPA 79
Size 5: 600A
Size 6: 1000A
If the necessary conditions are not met, an additional ground connection
must be provided to link the motor circuit ground and the supply ground.
70
Electrical Getting Basic
installation Started parameters
Conditions
2
2
2
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Figure 4-6 Size 2 ground connections

Figure 4-7 Size 3 ground connections

M6 bolt
Onboard Advanced Technical
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PLC parameters Data
Plain washers
Spring washer
Unidrive SP User Guide
Issue Number: 13
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