Resistor braking 343
18
Resistor braking
Contents of this chapter
This chapter describes how to select, protect and wire brake choppers and resistors
with the ACL30 drive. It also provides technical data for selecting brake choppers and
resistors.
Brake choppers and resistors
Brake choppers
The ACL30 drives have a built-in brake chopper as standard equipment to handle the
energy generated by a decelerating motor.
When the brake chopper is enabled and a resistor is connected, the chopper starts
conducting when the DC link voltage of the drive reaches low limit. The maximum
braking power is achieved at high limit.
Low and high limits can be calculated:
Low limit
= 1.35 * 1.25 * USED SUPPLY VOLT - 30
High limit
= Low limit + 60
Summary of Contents for ACL30
Page 1: ...ABB high performance elevator drives User s manual ACL30 elevator drive ...
Page 4: ......
Page 20: ...20 Safety instructions ...
Page 34: ...34 Operation principle and hardware description ...
Page 42: ...42 Planning the cabinet installation ...
Page 60: ...60 Planning the electrical installation ...
Page 126: ...126 Using the control panel ...
Page 318: ...318 Maintenance ...
Page 334: ...334 The Safe torque off function ...
Page 338: ...338 Mains chokes ...
Page 342: ...342 EMC filters ...
Page 348: ...Dimension drawings 348 Frame size B D1 D2 W H1 H2 ...
Page 349: ...Dimension drawings 349 ...
Page 350: ...Dimension drawings 350 Frame size C D1 D2 H2 H1 W ...
Page 351: ...Dimension drawings 351 ...
Page 352: ...Dimension drawings 352 Frame size D ...
Page 354: ...354 Dimension drawings EMC filters JFI 0x ...
Page 356: ...356 Dimension drawings Brake resistors JBR xx ...
Page 358: ...358 Dimension drawings ...