Table of Contents
Advertisement
Trip reasons 1, 2, 3, and 4 for the PKE motor-protective circuit-breaker have
the following effects on the DS7-SWD soft starter:
•
Profiles 1, 2, 3: The DS7-SWD soft starter will be stopped. After the PKE
motor-protective circuit-breaker is switched back on, the soft starter can
be switched back on with the DS7 start/stop 1 command.
•
Profiles 4, 5, 6: The DS7-SWD soft starter will be stopped. After the PKE
motor-protective circuit-breaker is switched back on, the soft starter can
be reset with the FaultAck = 1 command. The soft starter will be
switched on again directly depending on the position of the EN_Set and
EN_Op bits.
•
Profiles 7, 8, 9, 11: The DS7-SWD soft starter will stop.
After the PKE motor-protective circuit-breaker is switched back on, the fault
can be reset with the FaultAck = 1 command and the soft starter can be
switched back on with the relevant bits.
With the exception of trip reason "05
function," the transmitted trip reasons will be reset if the main contacts of
the PKE motor-protective circuit-breaker are closed back again and a current
flow is sensed through the PKE trip block. The "05
activated ZMR function" trip reason will be reset as soon as the thermal
motor map (TH) falls below a value of 100 %.
The "03
Phase failure/Phase unbalance" message will be set if a phase
hex
current difference of 50 % is measured between the maximum measured
phase current and the relevant phase. The message will be reset as soon as
the phase current difference falls below 25 %.
The "Phase failure/Phase unbalance" message will not necessarily cause the
main circuits to be interrupted. In order to protect the connected motor in the
event of a phase failure or phase unbalance, the tripping time in the event of
an overcurrent will be reduced to 40 % of the value used when the phase
load is balanced. The main circuits will be interrupted early.
The "Test" position on the PKE trip block and remote tripping via the R-TRIP
output bit causes a trip if a phase current of at least 85 % of the minimum
marker of the adjustable overload release on the PKE trip block flows through
all three main circuits (example: for device PKE-XTUA-4 I
0.85 x 1 A = 0.85 A).
Motor current [%] PKE (I_REL)
The DS7-SWD soft starter uses input byte 2 to provide the current motor
current to the PKE motor-protective circuit-breaker. The motor current is
represented as a relative value within a range of 0 % (00
(FF
). The relative value is calculated as the value of the maximum
hex
measured phase current relative to the set current value of the overload
release. The accuracy of the relative current indication depends on the
measured phase current relative to the PKE trip block's current range.
For a sufficiently accurate measurement of the phase current, a phase
current of at least 85 % of the adjustable overload release on the PKE trip
block must be flowing. The maximum measuring accuracy of the transferred
relative current value is 5 %.
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
Overload with activated ZMR
hex
Overload with
hex
r
hex
8 SmartWire-DT
8.9 Programming
= 1 A ￫ I
=
min
) to 255 %
165
Advertisement
Table of Contents
