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M-AI-VT-001-EN Rev.C.1
M-AI-VT-001-EN Rev.C.1
All Drive Modules may be used with an isolated
input source, as well as with ground reference
power lines when supplied from an isolated line
power source
• Comply with local and national electrical
codes for cable sizes and circuit protection
requirements
• Size wiring based upon the input current of
drive module
• Connect three-phase AC input power wiring
to terminals L1, L2, and L3
• Ground the cable in accordance with the
instructions provided
Refer to Figure 54 Typical Mains for
interconnection details
Mains AC Input Line
Connection
Electrical Power Wiring
Figure 54
Typical Mains AC Line
Connections
L1
L2
L3
93
92
91
L1
L2
L3
GROUND
DISCONNECT
CIRCUIT PROTECTION
MAINS
AC
INPUT
DRIVE MODULE
Ground the frequency converter and motor
solidly to the equipment frame. A good
connection allows the high frequency currents
to return to the drive module rather than
travel through the power network. The earth
connection is ineffective if it has high impedance
to high frequency currents. Make the connection
as short and direct as is practical. Flat-braided
cable has lower high-frequency impedance than
round cable. Mounting the frequency converter
or motor onto a painted surface does not create
an effective earth connection. In addition,
running a separate earth conductor directly
between the frequency converter and the
running motor is recommended.
1. All metal parts should be connected to ground,
including the shields of electrical cables.
2. Verify continuity of all ground connections.
3. Ensure solid ground connections (both
mechanical and electrical); connections must
be clean, and grease and paint free.
4. All grounds should be connected together
at a central point (usually the entrance of the
power supply panel). See Figure 55. From
an EMC standpoint, it is best to categorize
different types of grounds and treat them
independently:
• Safety ground (Protective Earth [PE]) and shields
of mains cables.
• Analog grounds, shielding of interface cables.
• Digital grounds.
• Reference ground (panel doors, back plate, etc.).
Grounding Connection
Guidelines
Disconnect
Circuit Protection
Wire Type and Ratings
• • • DANGER • • •
An input disconnect (for example, a switch or circuit breaker) must be installed in the line before
the drive module in accordance with applicable local, national, and international codes (for
example, NEC/CEC). Size the disconnect according to the full-load current.
User supplied circuit protection must be installed in accordance with local, national, and
international codes (such as NEC/CEC). The circuit protection must be installed in the line
before the drive module’s input terminals.
• All wiring must comply with local and national regulations regarding cross-section
and ambient temperature requirements.
• All the cables should be CSA, UL, or CE approved. The cable must be rated for 90 C
(194 F) minimum at maximum applicable current.