Grounding (Earthing); Control Wiring - Danfoss VLT FC Series Operating Instructions Manual

Installation

3.4.8 Grounding (Earthing)

WARNING
GROUNDING HAZARD!
FOR OPERATOR SAFETY, IT IS IMPORTANT TO GROUND
OPTION PANEL PROPERLY. FAILURE TO GROUND OPTION
PANEL PROPERLY COULD RESULT IN DEATH OR SERIOUS
INJURY.
NOTE
IT IS THE RESPONSIBILITY OF THE USER OR CERTIFIED
ELECTRICAL INSTALLER TO ENSURE CORRECT GROUNDING
(EARTHING) OF THE EQUIPMENT IN ACCORDANCE WITHNA-
TIONAL AND LOCAL ELECTRICAL CODES AND STANDARDS.
•
Follow all local and national codes for proper
electrical equipment grounding (earthing).
•
Correct protective grounding of the equipment
must be established. Ground currents are higher
than 3 mA.
•
A dedicated ground wire is required.
•
Connect the ground wire directly to a reliable
earth ground. Grounding studs are provided on
the back plate of the option panel for grounding.
•
Do not use conduit connected to the option
panel as a replacement for a ground wire.
•
Do not ground one panel to another in a "daisy
chain" fashion. Each panel must have a dedicated
ground connection.
•
A high strand count ground wire is preferred for
dissipating high frequency electrical noise.
•
Keep the ground wire connections as short as
possible.
Option Panel Operating Instructions

3.4.9 Control Wiring

Detailed instructions for terminal functions, control wiring
installation, and operation is shown in 5 Electromechanical
Bypass (EMB) Operation and 6 Electronically Controlled
Bypass (ECB) Operation.
NOTE
RUN INPUT POWER, MOTOR WIRING AND CONTROL
WIRING IN THREE SEPARATE METALLIC CONDUITS
ORRACEWAYS FOR HIGH FREQUENCY NOISE ISOLATION.
FAILURE TO ISOLATE POWER, MOTOR AND CONTROL
WIRING COULD RESULT IN LESS THAN OPTIMUM DRIVE
AND ASSOCIATED EQUIPMENT PERFORMANCE.
Illustration 3.14 Control Terminals Location
1 EIA-485 terminal
2 Jumper wire
3 Control terminals
4 Grounded restraining clips
Table 3.16 Legend to Illustration 3.14
®
MG14I102 - VLT is a registered Danfoss trademark
•
It is recommended that control wiring is rated for
600 V for 480 V and 600 V drives and 300 V for
200-240 V drives.
•
Isolate control wiring from high power
components in the drive.
•
See label inside of panel cover for details.
1
2
3 3
3
4
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