GE Industrial Solutions ASTAT XT - Manual (Page 72)

72 • Application diagrams
8.18
Short Circuit Protection
8.18.1
Type 1 Coordination
For Type 1 coordination either aM type fuses or Circuit breakers can be applied as shown in the tables below:
8.18.1.1
Type 1 Coordination with GE Circuit Breakers:
GE Circuit Breaker Soft Starter
Rated Current
O/L Breaking Capacity
A A Frame Type O/L Type KA
8 16 FD63 LTMD 16 65
17 40 FD63 LTMD 40 65
31 50 FD63 LTMD 50 65
44 63 FD160 LTMD 63 65
58 80 FD160 LTMD 80 65
72 80 FE160 LTMD 80 65
85 125 FE160 SMR1-125 65
105 160 FE160 SMR1-160 65
145 160 FE160 LTMD
160 65
170 250 FE250 LTMD 250 65
210 250 FE250 LTMD 250 65
310 400 FG630 SMR1-400 65
390 400 FG400 SMR1-400 65
460 630 FG630 SMR1-630 65
580 630 FG630 SMR1-630 65
650 800 FK800 SMR1s-800 50
820 1250 FK1250 SMR1s-1250 50
950 1250 FK1250 SMR1s-1250 50
1100 1250 FK1250 SMR1s-1250 50
1400 1600 FK1600 SMR1s-1600 50
8.18.1.2
Type 1 Coordination with Type aM Siba Fuses:
SIBA aM Fuses Soft Starter
Rated Current
Rated
Current
Breaking
Capacity
A A P/No. Size Un Type KA
8 16 20 477 08.16 000 690 aM 120
17 20 20 477 08.20 000 690 aM 120
31 35 20 477 08.35 000 690 aM 120
44 50 20 477 08.50 00 690 aM 120
58 80 20 209 08.80 00 690 aM 120
72 100 20 209 08.100 00 690 aM 120
85 125 20 209 08.125 00 690 aM 120
105 160 20 210 08.160 0 690 aM 120
145 200 20 211 08.200 1 690 aM 120
170 200 20 211 08.200 1 690 aM 120
210 250 20 211 08.250 1 690 aM 120
310 400 20 212 08.400 2 690 aM 120
390 500 20 213 08.500 3 690 aM 120
460 630 20 213 08.630 3 690 aM 120
580 800 20 225 08.800 4 690 aM 120
650 800 20 225 08.800 4 690 aM 120
820 1000 20 225 08.1000 4 690 aM 120
950 2x630 2x20 213 08.630 2x3 690 aM 120
1100 2x800 2x20 225 08.800 2x4 690 aM 120
1400 2x800 2x20 225 08.800 2x4 690 aM 120
8.18.2
Type 2 Coordination
For Type 2 coordination, use fuses for semiconductor protection to protect the ASTAT-XT from a short circuit.
Fuses for semiconductor protection give excellent results because they have low I²t values and high interruption
ratings.
Recommended fuse selection procedure:
Fuse rated voltage: Choose minimum fuse rated voltage which is above the rated voltage of the mains.
Fuse rated current: Select a fuse which is able to carry 8 times the rated ASTAT-XT current for 30 seconds (this is
double the maximum ASTAT-XT current for the maximum acceleration time).
Fuse I²t: Verify that the I²t value of the fuse is less than or equal to the I²t value of the thyristor in the ASTAT-XT as
shown in the table below.