NOTE
All TTS/TGS/TTH/TGH compressors are compliant with the following directives and standards:
LVD – Low Voltage Directive (2014/35/EU)
l EN 60335-1:2012+A11:2014 Household and similar electrical appliances – Safety – Part 1: General requirements
l EN 60335-2-34:2013 Household and similar electrical appliances – Safety – Part 2-34: Particular requirements for motor-
compressors
EMC – Electromagnetic Compatibility Directive (2014/30/EU)
l EN IEC 61000-6-2:2019 - Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial
environments
l EN IEC 61000-6-4:2019 - Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission standard for industrial
environments
6.9 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.
6.10 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. The rule of selecting the Line Reactor is:
PReactor_Rated [kW] = LRA [A]*URated [V]*1.73*0.9*/1000.
6.11 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. The rule of selecting the Harmonic filter is:
PFilter_Rated [kW] = LRA [A]*URated [V]*1.73*0.9/1000.
NOTE
Turbocor compressors are qualified for Class 3 Voltage Harmonics according to IEC 61000-2-4
6.12 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 6.13 Equipment Panel).
From an EMC standpoint, it is best to categorize different types of grounds and treat them independently (refer to
Chapter 6.0 Electrical Specifications):
l Safety ground (Protective Earth [PE]) and shields of mains cables
l Analog grounds, shielding of interface cables
l Digital grounds
l Reference ground (panel doors, backplate, etc.)
M-AP-001-EN Rev. S-9/8/2021 Page 49 of 136
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