ABB Relion 605 Series Applications Manual page 39

1MDU07212-YN Rev. D
4.9.2.2
4.9.2.3
4.10
4.10.1
4.10.2
REF601 / REJ601 / REM601
Application Manual
Inputs to Motor startup / Stalling protection
Table 19: Inputs to startup supervision/stalling protection I2t n<, 51LRS/14/48/66
Parameter Type
I REAL
L1
I REAL
L2
I REAL
L3
Spd Sw BOOL
Table 19: Inputs to startup supervision/stalling protection I2t n<, 51LRS/14/48/66, continue
Parameter Type
BLOCK BOOL
Outputs to Motor startup / Stalling protection
Table 20: Outputs from startup supervision/stalling protection I2t n<, 51LRS/14/48/66
Parameter Type
Motor start BOOL
Stall trip BOOL
I t trip BOOL
2
Block close BOOL
t REAL
MS
Istr max REAL
Restart Enabled t REAL
Phase reversal protection
Functionality
The phase reversal protection is used to detect the reversed connection of the
phases to a three-phase motor by monitoring the negative phase sequence current
(I2) of the motor. Function starts when the negative sequence current (I2) exceeds
the set value. The operate time characteristics is based on definite time (DT) i.e.
function operates after a predefined operate time.
Principle of operation
The measured negative sequence current is compared to the set I2R>. If the
measured value exceeds the set I2R>, the level detector activates the timer module.
On activation, timer activates the I2R> START output. The time characteristic is
according to Definite Time (DT). When the operation timer has reached the value
set by the tI2R>, the protection TRIP output is activated. If the fault disappears
before the module operates, the function resets immediately, and the protection
START output is deactivated.
The protection could be blocked by settings or via binary input of the relay.
Protection and Control Function
Description
Phase A current
Phase B current
Phase C current
Input signal for showing the motor is not
stalling (from speed switch)
Description
Blocking of function via binary input
Description
Motor startup indication
Motor operate signal for stalling protection.
Motor operate signal for thermal stress.
Lockout condition for restart of motor
Measured motor latest startup time in sec
Measured motor latest current time in amp
Time left for restart when lockstart is enabled
in minutes
Section 4
33