SIGMATEK 074.00660, Power Installation Manual

Page: 95 / 98

Sigmatek FDD Sizes 7 to 9 Power Installation Guide
95
S
afe
ty
inf
orm
at
io
n
P
rodu
ct in
fo
rm
at
ion
M
ec
ha
nical in
st
all
ati
on
E
le
ctri
cal installa
tion
Te
chn
ical
d
ata
U
L
ln
for
m
at
io
n
6.5 Environment
Drives must be installed in a Pollution Degree 2 environment or better (dry, non-conductive pollution
only).
The drives have been evaluated for use at ambient temperatures up to 40 °C. The drives have
additionally been evaluated for 50 °C and 55 °C ambient air temperatures with a derated output.
6.6 Electrical Installation
6.6.1 Overvoltage category
Drives have been evaluated for OVC III
6.6.2 Supply
When protected by the specified, Listed branch fuses, the drives are suitable for use on a circuit
capable of delivering not more than 100,000 RMS symmetrical amperes.
6.6.3 Terminal Torque
Terminals must be tightened to the rated torque as specified in the Installation Instructions.
6.6.4 Wiring Terminals
Drives must be installed using cables rated for 75 °C operation, copper wire only.
Where possible, UL Listed closed-loop connectors sized according to the field wiring shall be used
for all field power wiring connections.
6.6.5 Ground connection instructions
UL Listed closed-loop connectors sized according to the field wiring shall be used for grounding
connections.
6.6.6 Opening of branch circuit
Opening of the branch-circuit protective device may be an indication that a fault has been
interrupted. To reduce the risk of fire or electric shock, the equipment should be examined and
replaced if damaged. If burnout of the current element of an overload relay occurs, the complete
overload relay must be replaced.
6.6.7 Solid state short circuit protection
All drives incorporate solid state short circuit protection. However, this does not provide branch circuit
protection.
6.6.8 Branch circuit protection
Branch circuit protection must be provided in accordance with the National Electrical Code (NEC),
The Canadian Electrical Code, and any additional local codes. The fuse and circuit breaker types are
specified in the Electrical Installation section of this manual
6.6.9 Dynamic braking
The drives have not been evaluated for dynamic braking.
6.6.10 Regenerative operation
Drives can be configured as an AC Regenerative Unit (also known as a Regen drive). Regen
operation allows bi-directional power flow to and from the AC supply. The AC supply voltage must not
exceed 600 Vac.
In these systems the inverter output is connected to the AC supply via a reactor and switching
frequency filter. The drives are required to be protected by listed branch fuses as specified in the
installation instructions. For grid feed applications, further evaluation may be required to other
standards, such as, but not limited to UL1741, CSA C22.2 No. 107.1-01, IEEE 1547 etc.