Omron SX-F, Инструкция по эксплуатации

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268
Brake chopper
Section 13-3
13-3 Brake chopper
All VSD sizes can be fitted with an optional built-in brake chopper. The brake
resistor must be mounted outside the VSD. The choice of the resistor
depends on the application switch-on duration and duty-cycle. This option can
not be after mounted.
!Warning The table gives the minimum values of the brake resistors. Do not use
resistors lower than this value. The VSD can trip or even be damaged due to
high braking currents.
The following formula can be used to define the power of the connected brake
resistor:
Where:
P
resistor
required power of brake
resistor
Brake level V
DC
DC brake voltage level (see Table 35)
Rmin minimum allowable brake resistor
(see Table 35 and Table 36)
ED% effective braking period. Defined as:
Table 34 Brake Voltage levels
Supply voltage (V
AC
)
(set in menu [21B]
Brake level (V
DC
)
220–240 380
380–415 660
440–480 780
500–525 860
550–600 1000
660–690 1150
Table 35 Brake resistor SX 400V type
Type
Rmin [ohm] if supply 380–
415 V
AC
Rmin [ohm] if supply 440–
480 V
AC
SX-D40P7-EF 43 50
SX-D41P5-EF 43 50
SX-D42P2-EF 43 50
SX-D43P0-EF 43 50
SX-D44P0-EF 43 50
SX-D45P5-EF 43 50
SX-D47P5-EF 43 50
SX-D4011-EF 26 30
SX-D4015-EF 26 30
SX-D4018-EF 17 20
SX-D4022-EF 17 20
Presistor =
(Brake level VDC)2
Rmin
x ED%
ED% =
Active brake time at
120 [s]
Maximum value of
1= continuous braking
nominal braking
power [s]