ABB ACS800-02 User Manual

Resistor braking
124
All braking resistors must be installed outside the converter module. The resistors are built in an IP 00 metal frame. The 2xSAFUR and
4xSAFUR resistors are connected in parallel.
Resistor installation and wiring
All resistors must be installed outside the drive module in a place where they will
cool.
WARNING! The materials near the brake resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. Protect the resistor against contact.
Use the cable type used for drive input cabling (refer to chapter Technical Data) to
ensure the input fuses will also protect the resistor cable. Alternatively, two-
conductor shielded cable with the same cross-sectional area can be used. The
maximum length of the resistor cable(s) is 10 m (33 ft). For the connections, see the
power connection diagram of the drive.
Combined braking cycles for R7:
•After P
br5
, P
br10
or P
br30
braking, the drive and the chopper will withstand P
brcont
continuously.
• P
br5
, P
br10
or P
br30
braking is allowed once every minute.
•After P
brcont
braking, there has to be at least 30 seconds without any braking if the subsequent braking power is greater than P
brcont
.
•After P
br5
or P
br10
braking, the drive and the chopper will withstand P
br30
within a total braking time of 30 seconds.
• P
br10
braking is not acceptable after P
br5
braking.
Combined braking cycles for R8:
•After P
br5
, P
br10
or P
br30
braking, the drive and the chopper will withstand P
brcont
continuously. (P
brcont
is the only allowed braking power
after P
br5
, P
br10
or P
br30
.)
• P
br5
, P
br10
or P
br30
braking is allowed once every minute.
•After P
brcont
braking, there has to be at least 60 seconds without any braking if the subsequent braking power is greater than P
brcont
.
P
br
t
P
br5
or P
br10
P
br30
P
brcont
min. 30 s max 30 s min. 30 s
No braking
Examples
min. 30 s
max 5 s or 10 s
max 30 s
P
br
t
P
br5
, P
br10
or P
br30
P
brcont
min. 60 s
No braking
Examples
min. 60 s
max 5 s, 10 s or 30 s

ABB ACS800-02 Specifications

General

Brand	ABB
Model	ACS800-02
Category	Control Systems
Language	English