System Manual V2 – MOVITRAC® B
51
4
BW series braking resistors
Technical Data
4.14
BW series braking resistors
4.14.1 General information
BW series braking resistors are adapted to the MOVITRAC
®
B inverter series. The type
of cooling is KS = self-cooling (air ventilation).
The resistor surfaces will heat up under a load of P
N
. Make sure that you select an
installation site that will accommodate these high temperatures. As a rule, braking resis-
tors are therefore mounted on the control cabinet roof.
Provide for a load derating of 4 % per 10 K from an ambient temperature of 45 °C
(118 °F). Do not exceed the maximum ambient temperature of 80 °C (176 °F). Note the
maximum permissible temperature of other components (e.g. MOVITRAC
®
B) when
installing in the control cabinet.
4.14.2 PTC braking resistors
Observe the following points for the PTC braking resistors:
•
4-quadrant operation is recommended for applications in which the level of
regenerative energy is low.
•
The resistor protects itself (reversible) against regenerative overload by changing
abruptly to high resistance and no longer consuming any more energy.
•
The inverter then switches off and signals a brake chopper fault (fault code 04).
Assignment of the PTC braking resistors:
Braking resistor type
BW1
BW2
BW3
BW4
Part number
800 621 0
800 622 9
800 623 7
800 624 5
Ambient temperature
ϑ
A
-25 °C ... +60 °C (–13 °F ... 140 °F)
For MOVITRAC
®
B
0003 / 0004 (400/500 V)
0003 / 0004 (230 V)
P
i
f
kVA
Hz
n
Содержание MOVITRAC MC07B0037-2A3-4-00
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