General Grounding Requirements - Gram IF 4000 Manual De Uso

1-4 Installation/Wiring
Input Power Conditioning
The drive is suitable for direct connection to input power within the rated
voltage of the drive (see
input power conditions which may cause component damage or
reduction in product life. If any of the conditions exist, as described in
Table 1.B, install one of the devices listed under the heading Corrective
Action on the line side of the drive.
Important: Only one device per branch circuit is required. It should be
Table 1.B Input Power Conditions
Input Power Condition
Low Line Impedance (less than 1% line reactance) • Install Line Reactor
Greater than 120 kVA supply transformer
Line has power factor correction capacitors
Line has frequent power interruptions
Line has intermittent noise spikes in excess of
6000V (lightning)
Phase to ground voltage exceeds 125% of normal
line to line voltage
Ungrounded distribution system
(1)
Refer to

General Grounding Requirements

The drive Safety Ground -
ground. Ground impedance must conform to the requirements of
national and local industrial safety regulations and/or electrical codes.
The integrity of all ground connections should be periodically checked.
Figure 1.3 Typical Grounding
Appendix
mounted closest to the branch and sized to handle the total
current of the branch circuit.
Appendix B
for accessory ordering information.
R/L1
S/L2
T/L3
A). Listed in
Corrective Action
• or Isolation Transformer
• or Bus Inductor – 5.5 & 7.5 kW
(7.5 & 10 HP) drives only
• Install Line Reactor
• or Isolation Transformer
• Remove MOV jumper to ground.
• or Install Isolation Transformer
with grounded secondary if
necessary.
(PE) must be connected to system
U/T1
V/T2
W/T3
SHLD
Table 1.B are certain
(1)