Resistor braking
119
Resistor braking
What this chapter contains
This chapter describes how to select, protect and wire brake choppers and resistors.
The chapter also contains the technical data.
To which products this chapter applies
This chapter applies to the ACS800-01/U1 (frame sizes R2 to R6), the ACS800-02/
U2 (frame sizes R7 and R8), the ACS800-04/U4 (frame sizes R7 and R8) and the
ACS800-07/U7 (frame sizes R6, R7 and R8).
Availability of brake choppers and resistors for the ACS800
Frame R2 and R3 drives have a built-in brake chopper as standard equipment. For
frames R4 and up, brake choppers are optionally available as built-in units, indicated
in the type code by +D150.
Resistors are available as add-on kits. For the ACS800-07/U7, resistors are
available as factory installed.
How to select the correct drive/chopper/resistor combination
1. Calculate the maximum power
(P
max
) generated by the motor during braking.
2. Select a suitable drive / brake chopper / brake resistor combination for the
application according to the following tables (take account of other factors in the
drive selection also). The following condition must be met:
where
3. Check the resistor selection. The energy generated by the motor during a 400-
second period must not exceed the resistor heat dissipation capacity
E
R
.
If the
E
R
value is not sufficient, it is possible to use a four-resistor assembly in which two standard
resistors are connected in parallel, two in series. The
E
R
value of the four-resistor assembly is four
times the value specified for the standard resistor.
P
br
denotes
P
br5
,
P
br10
,
P
br30
,
P
br60
, or
P
brcont
depending on the duty cycle.
P
br
>
P
max
Содержание ACS800-02
Страница 1: ...ACS800 Hardware Manual ACS800 02 Drives 45 to 500 kW ACS800 U2 Drives 60 to 600 HP ...
Страница 4: ......
Страница 10: ...Safety instructions 10 ...
Страница 20: ...About this manual 20 ...
Страница 26: ...The ACS800 02 U2 26 ...
Страница 42: ...Planning the electrical installation 42 ...
Страница 76: ...Installation checklist 76 ...
Страница 106: ...Technical data 106 ...
Страница 107: ...Dimensional drawings 107 Dimensional drawings The dimensions are given in milllimetres and inches ...
Страница 108: ...Dimensional drawings 108 Frame size R7 US gland conduit plate 64579746 H ...
Страница 109: ...Dimensional drawings 109 Frame size R8 3AFE 64564161 D US gland conduit plate ...
Страница 110: ...Dimensional drawings 110 Frame size R7 with enclosure extension bottom entry 64625942 1 2 B ...
Страница 111: ...Dimensional drawings 111 64625942 2 2 C ...
Страница 112: ...Dimensional drawings 112 Frame size R7 with enclosure extension top entry 64626264 1 2 C ...
Страница 113: ...Dimensional drawings 113 64626264 2 2 C ...
Страница 114: ...Dimensional drawings 114 Frame size R8 with enclosure extension bottom entry 3AFE 64626388 1 2 B ...
Страница 115: ...Dimensional drawings 115 3AFE 64626388 2 2 B ...
Страница 116: ...Dimensional drawings 116 Frame size R8 with enclosure extension top entry 3AFE 64626370 1 2 C ...
Страница 117: ...Dimensional drawings 117 3AFE 64626370 2 2 C ...
Страница 118: ...Dimensional drawings 118 ...
Страница 127: ......