P9 ASD Installation and Operation Manual 5
Conductor Routing and Grounding
Precautions
• Use separate metal conduits for routing the input power, output power, and control circuits.
• A separate ground cable should be run inside the conduit with the input power, output power, and
control circuits.
• DO NOT connect CC to earth ground.
•Use IICC terminal as the return for the V/I input.
• Always ground the unit to prevent electrical shock and to help reduce electrical noise.
• If the ASD is being used in an ungrounded system (floating system) or in an unsymmetrically
grounded system, the EMI filter must be disconnected or removed. The ASD may be damaged if
the EMI filter is used.
• It is the responsibility of the ASD installer/maintenance personnel to provide proper grounding and
branch circuit protection in accordance with the NEC and any applicable local codes.
— The Metal Conduit Is Not An Acceptable Ground —
Grounding Capacitor Setting Precaution
If operating using an ungrounded 3-phase power source or within a high-resistance grounding
system, the Grounding Capacitance must be set to Small or Out (typeform-specific) as
shown on pg. 19. If set to High, a system malfunction, component failure, or fire may result.
Grounding Capacitor Switching
The ASD is equipped with noise reduction capacitors which are used to reduce the EMI leakage via the
3-phase power-input circuit and for compliance with the Electromagnetic Compatibility Directive
(EMC).
The effective value of the capacitor may be increased, reduced, or removed entirely via the Selector
Switch, Switching Bar, or the Switching Screw — the type used is typeform-specific.
The Grounding Capacitor Switch allows the user to quickly change the value of the capacitance of the
3-phase input circuit without the use of tools. The Switching Bar and the Switching Screw are easily
changed with the use of a wrench or a screw driver, respectively.
See the section titled System Grounding on pg. 18 for more on the Grounding Capacitor.
See figures 4, 5, 6, and 7 on pg. 19 for an electrical depiction of the leakage-reduction functionality of
the Grounding Capacitor and the methods used to set the capacitance value.
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