Ac Mains Connection; Control Wiring; Access - GE AF-650 GP Design And Installation Manual

Installation
Illustration 2.8 shows mains input, motor, and grounding
for basic frequency converters. Actual configurations vary
with unit types and optional equipment.
2 2
Illustration 2.8 Example of Motor, Mains, and Ground Wiring

2.5.4 AC Mains Connection

•
Size wiring based on the input current of the
frequency converter. For maximum wire sizes, see
Table 12.1.
•
Comply with local and national electrical codes
for cable sizes.
•
Connect 3-phase AC input power wiring to
terminals L1, L2, and L3 (see Illustration 2.8).
•
Depending on the configuration of the
equipment, input power is connected to the
mains input power or the input disconnect.
•
Ground the cable in accordance with grounding
instructions provided in chapter 2.5.2 Grounding
Requirements.
•
All frequency converters may be used with an
isolated input source and with ground reference
power lines. When supplied from an isolated
mains source (IT mains or floating delta) or
TT/TN-S mains with a grounded leg (grounded
delta), set parameter SP-50 RFI Filter to [0] Off.
When off, the internal RFI filter capacitors
between the chassis and the intermediate circuit
are isolated to avoid damage to the DC link and
to reduce ground capacity currents in accordance
with IEC 61800-3.
22

2.5.5 Control Wiring

•
Isolate control wiring from high-power
components in the frequency converter.
•
If the frequency converter is connected to a
thermistor, for PELV isolation, optional thermistor
control wiring must be reinforced/double
insulated. A 24 V DC supply voltage is
recommended.

2.5.5.1 Access

•
Remove access cover plate with a screwdriver.
See Illustration 2.9.
•
Or remove front cover by loosening attaching
screws. See Illustration 2.10.
Tightening torque for front cover is 2.0 Nm for
unit size 15 Nm and 2.2 Nm for unit sizes 2X and
3X.
Illustration 2.9 Control Wiring Access for IP20/Open Chassis
Enclosures
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