Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Electrical installation
4.9 Additional connections
Enclosed Drives
132
Operating Instructions, 12/2018, A5E36652151A
4.9.11 25 kW braking unit (option L61/L64); 50 kW braking unit (option L62/L65)
Description
Under normal circumstances, the braking energy is supplied back to the line. If a controlled
stop is also required in the event of a power failure, however, additional braking units can be
provided. The braking units comprise a chopper power unit and a load resistor, which must
be attached externally. To monitor the braking resistor, it has an integrated thermostatic
switch, which is included in the shutdown circuit of the cabinet unit.
Table 4- 39 Load data for the braking units
Line voltage Continuous
chopper
power
P
DB
Peak chopper
output
P
15
Chopper
P
20
output
P
20
Chopper
P
40
output
P
40
Braking resistor
R
B
Max.
current
Option
380 V ... 480 V 25 kW 125 kW 100 kW 50 kW 4.4 Ω ± 7.5% 189 A L61
380 V ... 480 V 50 kW 250 kW 200 kW 100 kW 2.2 Ω ± 7.5% 378 A L62
500 V ... 600 V 25 kW 125 kW 100 kW 50 kW 6.8 Ω ± 7.5% 153 A L64
500 V ... 600 V 50 kW 250 kW 200 kW 100 kW 3.4 Ω ± 7.5% 306 A L65
660 V ... 690 V 25 kW 125 kW 100 kW 50 kW 9.8 Ω ± 7.5% 127 A L61
660 V ... 690 V 50 kW 250 kW 200 kW 100 kW 4.9 Ω ± 7.5% 255 A L62
4.9.11.1 Installing the braking resistor
Installing the braking resistor
The braking resistor should not be installed in the vicinity of the drive. The installation
location must fulfill the following conditions:
● The braking resistors are suitable for floor mounting only.
● The maximum cable length between the cabinet unit and braking resistor is 330 ft
(100 m).
● Sufficient space must be available for dissipating the energy converted by the braking
resistor.
● A sufficient distance from flammable objects must be maintained.
● The braking resistor must be installed as a free-standing unit.
● Objects must not be placed on or anywhere above the braking resistor.
● The braking resistor should not be installed underneath fire detection systems, since
these could be triggered by the resulting heat.
● A roof is required for compliance with NEMA 1. For outdoor installation, braking resistors
must be installed in an enclosure (NEMA 3R) for protection against falling rain or sleet.