Siemens SIPROTEC 7UM62 User Manual

Technical Data
4.30 Restart Inhibit for Motors (ANSI 66, 49Rotor)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
506
4.30 Restart Inhibit for Motors (ANSI 66, 49Rotor)
Setting Ranges / Increments
Restart Threshold
Restarting Times
Motor starting current relative to the Nominal Motor Current
I
StartCurr
/I
Mot.Nenn
1.5 to 10.0 Increments 0.1
Max. admissable Startup Timen t
Start Max.
3.0 s to 120.0 s Increments 0.1 s
Leveling Time T
Leveling
0.0 min to 60.0 min Increments 0.1 min
Maximum admissible Number of Warm Starts n
WARM
1 to 4 Increments 1
Difference betwwen Cold and Warm Starts n
cold
- n
WARM
1 to 2 Increments 1
Extension Factor at Standstill k
τ Standstill
1.0 to 100.0 Increments 0.1
Extesion of Time Constant at Motor Running k
τ Operation
1.0 to 100.0 Increments 0.1
Minimum Restart Inhibit Time 0.2 min to 120.0 min Increments 0.1 min
Significance:
Θ
Re.Inh.
Temperature limit below which a restart is possible
Θ
R max perm
Maximum admissible rotor overtemperature (= 100 % of operational value Θ
R
/Θ
R Trip
)
n
cold
number of admissible starts from cold
T
Rem.
Time after which motor may be reswitched on
T
Leveling
Leveling time during which the thermal replica is "frozen"
T
Re.Inh.
Time until the thermal replica is again below the restart threshold depends on:
Θ
pre
Rotor temperature past history
τ
R
Rotor time constant, internally calculated
k
τ
Extension factor for the time constant k
τ OPERATION
or k
τ STANDSTILL

Siemens SIPROTEC 7UM62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7UM62
Category	Protection Device
Language	English