ABB Relion 620 Series - Signals

n specified maximum allowed number of motor start-ups
t start-up time of the motor (in seconds)
margin safety margin (~10...20 percent)
Setting of Counter Red rate
Counter Red rate is calculated by
∆ t
t
t
s
reset
∑
=
(Equation 146)
t specified start time of the motor in seconds
t
reset
duration during which the maximum number of motor start-ups stated by the
manufacturer can be made; time in hours
4.10.6 Signals
Table 721: STTPMSU Input signals
Name Type Default Description
I_A SIGNAL 0 Phase A current
I_B SIGNAL 0 Phase B current
I_C SIGNAL 0 Phase C current
BLOCK BOOLEAN 0=False Block of function
BLK_LK_ST BOOLEAN 0=False Blocks lock out condi-
tion for restart of mo-
tor
CB_CLOSED BOOLEAN 0=False Input showing the
status of motor cir-
cuit breaker
STALL_IND BOOLEAN 0=False Input signal for show-
ing the motor is not
stalling
ST_EMERG_ENA BOOLEAN 0=False Enable emergency
start to disable lock
of start of motor
Table 722: STTPMSU Output signals
Name
Type Description
OPR_IIT BOOLEAN Operate/trip signal for ther-
mal stress.
OPR_STALL BOOLEAN Operate/trip signal for stall-
ing protection.
Table continues on the next page
Protection functions 1MRS757644 H
766 620 series
Technical Manual