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ABB MD21 User Manual

ABB MD21
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Feeder
Feeder is the control logic customized for the load
controlled by circuit breaker directly without using
a contactor. The feeder application in M10x pro-
vide measurement and control functionality only.
Name Pin Description
CCLI X4:6 Contactor control voltage input
CCA X4:7 Control YC /motor drive in MCCB (2 seconds holding)
CCB X4:8 Control YO/motor drive in MCCB (2 seconds holding)
DI6 (F_Ca) X1:7 Circuit breaker position aux. feedback
DI9 (External trip input) X1:10 Circuit breaker trip aux. feedback
DI5 (Loc/R) X1:6 Local/remote control switch input*

* The assigned DI and PIN code may change in actual design
Depending on the type of the load, pro-
tection functions which are designed
for motors in M10x may not be suitable
for feeder load and shall be carefully se-
lected or switched off.
Operating:
Start 1 command activates contactor output relay
CCA for 2 seconds. Start 2 command activates
contactor output relay CCB for 2 seconds.
External trip occurs a trip message and will be re-
set when the signal is inactive.
Monitoring:
Circuit breaker close/open status Circuit breaker
trip
Protection:
Motor protection functions are not suitable for
feeder application. All protections except earth
fault protection in M10x are automatically
disabled during parameter setting when feeder
type is selected.
Measuring:
Current, voltage are measured by M10x. Power,
energy and other parameters related to power
factor are NOT correct and should not be referred
to.
Feeder application is customized as following,
31 Control circuit for feeder
0 4 . MOTOR STARTERS CONTROL 39

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ABB MD21 Specifications

General IconGeneral
BrandABB
ModelMD21
CategoryControl Unit
LanguageEnglish

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