GE Industrial Solutions ASTAT-CD Plus - Manual (Page 9)

2-3. ASTAT ® -CD Plus, Thermal characteristics
The ASTAT-CD Plus allows the user to select motor protection according to IEC Class 10, 20 and NEMA 10, 20 or 30, selectable by "o" -overload- parameter
2. Types and Ratings
2-3
IEC Class 10 IEC Class 20
NEMA 10 NEMA 20
NEMA 30
Thermal memory:
If the control voltage is not removed, the unit has a cool down
characteristic. The time for cool down is 300 sec. after the overload trip.
If the control voltage is removed after tripping, you must wait at least 2
minutes before the unit can be restarted.
Operations per hour:
Using a cycle T, with starting time of t1, running time of T-2t1 at rated
current and OFF time of t1 sec. (minimum), the ASTAT-CD Plus allows
the following operations per hour.
Starting Operations / Hour. Operations / Hour
Current Starting time t1= 10sec. Starting time t1=20 sec.
Sec. Sec.
Sec. Sec.
Sec.
2 Ir 180 90
3 Ir 160 60
4 Ir 30 10
COLD
HOT
COLD
HOT
HOT
COLD
HOT
COLD
HOT
COLD
Multiples of motor FLA rating I n
Multiples of motor FLA rating I
n
Multiples of motor FLA rating I
n
Multiples of motor FLA rating I
n
Multiples of motor FLA rating I n