![background image](http://html1.mh-extra.com/html/danfoss/dsf090/dsf090_application-manual_3439655036.webp)
Vavg
V1-2
V1-3
V2-3
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:
% voltage imbalance = | 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 19: Motor voltage code3
Compressor model
LRA
RLA
Max operating current
Winding resistance
A
A
A
Ω
DSF090
203
31
34
0.39
DSF100
203
32
37
0.39
DSF115
267
38
44
0.27
DSF130
267
44
48
0.27
DSF155
304
41
55
0.24
DSF175
315
47
62
0.22
DSF200
351
56
70
0.22
DSF270
471
70
96
0.16
DSF325
574
84
118
0.13
DSF485
824
142
174
0.17
DSF530
824
137
190
0.17
Table 20: Motor voltage code4
Compressor model
LRA
RLA
Max operating current
Winding resistance
A
A
A
Ω
DSF090
98
17.1
17
1.47
DSF100
98
17.9
19
1.47
DSF115
142
20
22
1.05
DSF130
142
22.9
24
1.05
Scroll compressors, DSF090 to DSF530 | Electrical connections
© Danfoss | Climate Solutions | 2023.06
AB309735209512en-000603 | 36