Siemens
ÑÐÅÄÑÒÂÀ ÏÐÎÌÛØËÅÍÍÎÉ ÀÂÒÎÌÀÒÈÇÀÖÈÈ
îôèöèàëüíûé ïàðòíåð Ñèìåíñ
Êàòàëîã ÑÀ01 2018
(4872) 700-366
skenergo@mail.ru

Derating data

SINAMICS S150 converter cabinet units and the associated system components are rated for an ambient temperature of 40 °C and installation altitudes up to 2000 m above sea level.

At ambient temperatures > 40 °C, the output current must be reduced. Ambient temperatures above 50 °C are not permissible.

At installation altitudes > 2000 m above sea level, it must be taken into account that the air pressure, and therefore air density, decreases as the height increases. As a consequence, the cooling efficiency and the insulation capacity of the air also decrease.

Due to the reduced cooling efficiency, it is necessary, on the one hand, to reduce the ambient temperature and on the other hand, to lower heat loss in the converter cabinet unit by reducing the output current, whereby ambient temperatures lower than 40 °C may be offset to compensate.

The following table lists the permissible output currents depending on the installation altitude and ambient temperature for the various degrees of protection. The specified values already include a permitted compensation in respect of installation altitude and ambient temperatures < 40 °C (temperature at the air intake of the converter cabinet unit).

The values apply under the precondition that the cooling air flow stated in the technical specifications is ensured by the way the devices are installed in the cabinet.

As additional measure for installation altitudes from 2000 m up to 5000 m, an isolating transformer is required in order to reduce transient overvoltages according to EN 60664‑1. For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.

Current-derating factors for converter cabinet units depending on the ambient / air intake temperature, the installation altitude and the degree of protection

Degree of protection

Installation altitude above sea level

Current derating factor (as a percentage of the rated current)
for an ambient / air intake temperature of

 

m

20 °C

25 °C

30 °C

35 °C

40 °C

45 °C

50 °C

IP20, IP21, IP23, IP43

0 ... 2000

100 %

100 %

100 %

100 %

100 %

93.3 %

86.7 %

2001 ... 2500

100 %

100 %

100 %

100 %

96.3 %

 

 

2501 ... 3000

100 %

100 %

100 %

98.7 %

 

 

 

3001 ... 3500

100 %

100 %

100 %

 

 

 

 

3501 ... 4000

100 %

100 %

96.3 %

 

 

 

 

4001 ... 4500

100 %

97.5 %

 

 

 

 

 

4501 ... 5000

98.2 %

 

 

 

 

 

 

IP54

0 ... 2000

100 %

100 %

100 %

100 %

93.3 %

86.7 %

80.0 %

2001 ... 2500

100 %

100 %

100 %

96.3 %

89.8 %

 

 

2501 ... 3000

100 %

100 %

98.7 %

92.5 %

 

 

 

3001 ... 3500

100 %

100 %

94.7 %

 

 

 

 

3501 ... 4000

100 %

96.3 %

90.7 %

 

 

 

 

4001 ... 4500

97.5 %

92.1 %

 

 

 

 

 

4501 ... 5000

93.0 %

 

 

 

 

 

 



Current derating as a function of the pulse frequency

To reduce motor noise or to increase output frequency, the pulse frequency can be increased relative to the factory setting (1.25 kHz or 2 kHz). When the pulse frequency is increased, the derating factor of the output current must be taken into account. This derating factor must be applied to the currents specified in the technical specifications.

For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.

Derating factor of the output current depending on the pulse frequency for devices with a rated pulse frequency of 2 kHz

SINAMICS S150 converter cabinet unit

Type rating
at 400 V

Output current
at 2 kHz

Derating factor

at pulse frequency

6SL3710-...

kW

A

2.5 kHz

4 kHz

5 kHz

7.5 kHz

8 kHz

380 ... 480 V 3 AC

7LE32-1AA3

110

210

95 %

82 %

74 %

54 %

50 %

7LE32-6AA3

132

260

95 %

83 %

74 %

54 %

50 %

7LE33-1AA3

160

310

97 %

88 %

78 %

54 %

50 %

7LE33-8AA3

200

380

96 %

87 %

77 %

54 %

50 %

7LE35-0AA3

250

490

94 %

78 %

71 %

53 %

50 %



Derating factor of the output current depending on the pulse frequency for devices with a rated pulse frequency of 1.25 kHz

SINAMICS S150 converter cabinet unit

Type rating
at 400 V or 690 V

Output current
at 1.25 kHz

Derating factor

at pulse frequency

6SL3710-...

kW

A

2 kHz

2.5 kHz

4 kHz

5 kHz

7.5 kHz

380 ... 480 V 3 AC

7LE36-1AA3

315

605

83 %

72 %

64 %

60 %

40 %

7LE37-5AA3

400

745

83 %

72 %

64 %

60 %

40 %

7LE38-4AA3

450

840

87 %

79 %

64 %

55 %

40 %

7LE41-0AA3

560

985

92 %

87 %

70 %

60 %

50 %

7LE41-2AA3

710

1260

92 %

87 %

70 %

60 %

50 %

7LE41-4AA3

800

1405

97 %

95 %

74 %

60 %

50 %

500 ... 690 V 3 AC

7LG28-5AA3

75

85

93 %

89 %

71 %

60 %

40 %

7LG31-0AA3

90

100

92 %

88 %

71 %

60 %

40 %

7LG31-2AA3

110

120

92 %

88 %

71 %

60 %

40 %

7LG31-5AA3

132

150

90 %

84 %

66 %

55 %

35 %

7LG31-8AA3

160

175

92 %

87 %

70 %

60 %

40 %

7LG32-2AA3

200

215

92 %

87 %

70 %

60 %

40 %

7LG32-6AA3

250

260

92 %

88 %

71 %

60 %

40 %

7LG33-3AA3

315

330

89 %

82 %

65 %

55 %

40 %

7LG34-1AA3

400

410

89 %

82 %

65 %

55 %

35 %

7LG34-7AA3

450

465

92 %

87 %

67 %

55 %

35 %

7LG35-8AA3

560

575

91 %

85 %

64 %

50 %

35 %

7LG37-4AA3

710

735

87 %

79 %

64 %

55 %

25 %

7LG38-1AA3

800

810

97 %

95 %

71 %

55 %

35 %

7LG38-8AA3

900

910

92 %

87 %

67 %

55 %

33 %

7LG41-0AA3

1000

1025

91 %

86 %

64 %

50 %

30 %

7LG41-3AA3

1200

1270

87 %

79 %

55 %

40 %

25 %



The following table lists the maximum achievable output frequency as a function of the pulse frequency:

Pulse frequency

Max. achievable output frequency

1.25 kHz

100 Hz

2 kHz

160 Hz

2.5 kHz

200 Hz

≥4 kHz

300 Hz



Overload capability

The SINAMICS S150 converter cabinet units are equipped with an overload reserve to deal with breakaway torques, for example. If larger surge loads occur, this must be taken into account in the configuration. For drives with overload requirements, the appropriate base load current must, therefore, be used as a basis for the required load.

The criterion for overload is that the drive is operated with its base load current before and after the overload occurs on the basis of a duty cycle duration of 300 s.

Another precondition is that the frequency converter is operated at its factory-set pulse frequency at output frequencies >10 Hz.

For temporary, periodic duty cycles with high variations of load within the duty cycle, the relevant sections of the SINAMICS Low Voltage Engineering Manual must be observed.

The base-load current for a low overload IL is the basis for a duty cycle of 110 % for 60 s or 150 % for 10 s.

Low overload

The base-load current IH for a high overload is based on a duty cycle of 150 % for 60 s or 160 % for 10 s.

High overload

















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