Conductor routing and grounding, The metal of conduit is not an acceptable ground, Warning – Toshiba H9 User Manual
Page 13: Grounding capacitor switch
H9 ASD Installation and Operation Manual
5
Conductor Routing and Grounding
•
Use separate metal conduits for routing the input power, output power, and control circuits and each
shall have its own ground cable.
•
A separate ground cable should be run inside the conduit with the input power, output power, and
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.
•
It is the responsibility of the person installing the H9 ASD or the electrical maintenance personnel
to provide proper grounding and branch circuit protection in accordance with the 2005 NEC and
any applicable local codes.
T h e M e t a l O f C o n d u i t I s N o t A n A c c e p t a b l e G r o u n d .
Grounding Capacitor Switch
The H9 ASD is equipped with leak 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 leakage-reduction
capacitance of the 3-phase input circuit without the use of tools.
See the section titled
Power Connection Requirements on pg. 17
for more on the
.
See figures
,
, and
an electrical depiction of the leakage-reduction functionality of the
and the methods used to set the capacitance value.
The H9 ASD is equipped with a noise reduction capacitor which is used to reduce the noise of the 3-
phase input circuit. The capacitor may be removed from the circuit electrically using the Grounding
Capacitor Switch (see
).
The switch has a push-pull activation mechanism. From the front of the unit, push the actuator to place
the noise reduction capacitor into the circuit. Pull the actuator to remove the noise reduction capacitor
from the circuit.
WARNING