Table 21: Motor voltage
NOTE:
Voltage range: Nominal voltage ± 10%. The voltage range indicates where the compressor can run in the majority
of the application envelope. A boundary voltage supply which accumulates under specic conditions such as high
ambiance, high superheat, or map boundary conditions, may lead to a compressor trip.
Voltage imbalance
The maximum allowable voltage imbalance is 2%. Voltage imbalance causes high amperage over one or several
phases, which in turn leads to overheating and possible motor damage. Voltage imbalance is given by the formula:
% voltageimbalance =
| Vavg − V1−2 | + | Vavg − V1−3 | + | Vavg − V2−3 |
2×Vavg
×100
Mean voltage of phases 1, 2, 3.
Voltage between phases 1 and 2.
Voltage between phases 1 and 3.
Voltage between phases 2 and 3.
IP rating
The compressor terminal box according to IEC60529 is IP54 for all models when correctly sized IP54 rated cable
glands are used.
First numeral, level of protection against contact and foreign objects
5 - Dust protected
Second numeral, level of protection against water
4 - Protection against water splashing
Terminal box temperature
The temperature inside the terminal box must not exceed 70°C (158°F). Consequently, if the compressor is installed
in an enclosure, precautions must be taken to avoid that the temperature around the compressor and in the
terminal box would rise too much. A ventilation installation on the enclosure panels may be necessary. If not, the
electronic protection module may not operate properly. Any compressor damage related to this will not be covered
by Danfoss warranty. In the same manner, cables must be selected in a way that ensures the terminal box
temperature does not exceed 70°C (158°F).
Three phase electrical characteristics
Table 22: Motor voltage code 3
Scroll compressors, DSH090 to DSH600 | Electrical connections
© Danfoss | Climate Solutions | 2022.10 AB288965961751en-001402 | 40
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