FC101 Design Guide

It is the responsibility of the installer or user of the
equipment to ensure, by consultation with the distribution
network operator if necessary, that the equipment is
connected only to a supply with a short-circuit power S
sc
greater than or equal to specied above.
Other power sizes can be connected to the public supply
network by consultation with the distribution network
operator.
Compliance with various system level guidelines:
The harmonic current data in Table 3.10 to Table 3.17 are
given in accordance with IEC/EN 61000-3-12 with reference
to the Power Drive Systems product standard. They may be
used as the basis for calculation of the harmonic currents'
inuence on the power supply system and for the
documentation of compliance with relevant regional
guidelines: IEEE 519 -1992; G5/4.
3.4.7 Immunity Requirements
The immunity requirements for frequency converters
depend on the environment where they are installed. The
requirements for the industrial environment are higher
than the requirements for the home and
oce
environment. All Danfoss frequency converters comply
with the requirements for the industrial environment and
therefore comply also with the lower requirements for
home and oce environment with a large safety margin.
3.5
Galvanic Isolation (PELV)
PELV oers protection through extra low voltage.
Protection against electric shock is ensured when the
electrical supply is of the PELV type and the installation is
made as described in local/national regulations on PELV
supplies.
All control terminals and relay terminals 01-03/04-06
comply with PELV (protective extra low voltage) (does not
apply to grounded delta leg above 440 V).
Galvanic (ensured) isolation is obtained by
fullling
requirements for higher isolation and by providing the
relevant creepage/clearance distances. These requirements
are described in the EN 61800-5-1 standard.
The components that make up the electrical isolation, as
described, also comply with the requirements for higher
isolation and the relevant test as described in EN
61800-5-1.
The PELV galvanic isolation can be shown in Figure 3.55.
To maintain PELV, all connections made to the control
terminals must be PELV, for example, thermistors must be
reinforced/double insulated.
0.25–22 kW (0.34–30 hp)
SMPS
130BB896.10
1
2
3
a
M
1 Supply (SMPS)
2 Optocouplers, communication between AOC and BOC
3 Custom relays
a Control card terminals
Figure 3.54 Galvanic Isolation
30–90 kW (40–120 hp)
130BB901.10
1
3
24
5
a
M
1 Supply (SMPS) including signal isolation of UDC, indicating
the intermediate current voltage
2 Gate drive that runs the IGBTs (trigger transformers/opto-
couplers)
3 Current transducers
4 Internal soft-charge, RFI, and temperature measurement
circuits
5 Custom relays
a Control card terminals
Figure 3.55 Galvanic Isolation
The functional galvanic isolation (see Figure 3.54) is for the
RS485 standard bus interface.
Product Overview
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HVAC Basic Drive FC 101
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