Functions
216
7UM62 Manual
C53000-G1176-C149-3
Under nominal conditions, the tripping time is the maximum starting time T
Startmax
. For
ratios deviating from nominal conditions, the motor tripping time changes. At 80 % of
nominal voltage (which corresponds to 80% of nominal starting current), the tripping
time can be:
After the delay time
has elapsed, the locked rotor binary input
becomes effective and initiates a tripping signal. If the locked rotor time is set just long
enough that during normal startup the binary input ”
” (FNo. 06805)
is reliably reset during the delay time
, faster tripping will be
available during motor starting under locked rotor conditions.
2.32.2.1 Settings of the Motor Starting Time Supervision
The following list indicates the setting ranges and the default settings of a I
N
= 1 A
secondary nominal current. For a secondary nominal current of I
N
= 5 A, these values
must be multiplied by 5. Consider the current transformer ratios when setting the
device with primary values.
2.32.2.2 Information for the Motor Starting Time Supervision
T
Trip
I
StartCurr.
I
----------------------
è
ø
æ
ö
2
T
Startmax
⋅
=
T
Trip
624 A
0.8 624 A
⋅
----------------------------
è
ø
æ
ö
2
8.5 s
⋅
13.3 s
=
=
Addr.
Setting Title
Setting Options
Default Setting
Comments
6501
STARTUP MOTOR
OFF
ON
Block relay for trip com-
mands
OFF
Motor Starting Time Supervision
6502
START. CURRENT
0.10..16.00 A
3.12 A
Starting Current of Motor
6503
STARTING TIME
1.0..180.0 sec
8.5 sec
Starting Time of Motor
6504
LOCK ROTOR
TIME
0.5..120.0 sec;
∞
6.0 sec
Permissible Locked Rotor Time
6505
I MOTOR START
0.60..10.00 A
1.60 A
Current Pickup Value of Motor
Starting
F.No.
Alarm
Comments
06801 >BLK START-SUP
>BLOCK Motor Starting Supervision
06805 >Rotor locked
>Rotor is locked
06811 START-SUP OFF
Starting time supervision switched OFF
06812 START-SUP BLK
Starting time supervision is BLOCKED
06813 START-SUP ACT
Starting time supervision is ACTIVE
06822 Rotor locked
Rotor is LOCKED after Locked Rotor Time
06823 START-SUP PU
Starting time supervision picked up
06821 START-SUP TRIP
Starting time supervision TRIP