Danfoss Turbocor Twin-Turbine TTS Series, Руководство по применению и установке

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M-AP-001-EN Rev. Q
to the main ground bus is recommended for top performance. A battery braid, litz wire, or flexible
welding cable with many fine strands, is recommended for best grounding performance. The multiple-
strand cabling provides more surface area in order to conduct the high frequencies that are on the
grounding cable.
Radiation of noise is also a concern for power line routing as it can effectively bypass the filter. Input
and output filter leads should be separated by a maximum practical distance within enclosures and
should be routed separately in interconnecting conduits when used.
NOTE
All TTS/TGS/TTH/TGH compressors are compliant with standards:
IEC 60335-2-34:2002
IEC 60335-1:2007 EN 61000-6-2:2005
EN 61000-6-4:2007 2004/95/EC
2006/42/EC
6.8 Surge Protection
All Turbocor compressors have been tested in accordance with IEC Standard 1000-4-4. Electrical Fast
Transient/Burst Requirement. For additional protection, a surge suppressor can be installed in parallel with
the compressor. It is recommended to install surge suppression in sites that are susceptible to lighting.
6.9 Line Reactor
It is mandatory to install a 5% line reactor for every Turbocor compressor. The installation of the
line reactor should be according to "Figure 20-9 Typical Electrical Connections" on page 106. The rule
of selecting the Line Reactor is:
P
Reactor_Rated
[kW] = FLA [A]*U
Rated
[V]*1.73*0.9*1.25/1000.
6.10 Harmonic Current Filtering (IEEE 519)
If it is necessary to provide additional current harmonic reduction beyond that provided by the
standard 5% line reactor, Danfoss LLC recommends the installation of a harmonic filter device in
parallel with the compressor as shown in "Figure 20-9 Typical Electrical Connections" on page 106.
The rule of selecting the Harmonic filter is:
P
Filter_Rated
[kW] = FLA [A]*U
Rated
[V]*1.73*0.9*1.25/1000.
6.11 Grounding (Earth) Connection Guidelines
1. All metal parts should be connected to ground, including the shields of electrical cables.
2. Verify continuity of all ground connections.
3. Ensure solid ground connections (both mechanical and electrical). Connections must be clean,
and grease and paint free.
4. At one point, usually the entrance of the power supply panel, all grounds should be connected
together (refer to Section "6.12 Equipment Panel" on page 43).
From an EMC standpoint, it is best to categorize different types of grounds and treat them
independently (refer to "Figure 6-1 Typical Ground Connections" on page 43):
• Safety ground (Protective Earth [PE]) and shields of mains cables.
• Analog grounds, shielding of interface cables.
• Digital grounds.
• Reference ground (panel doors, backplate, etc.).