Fuji Electric BW32AAG - Selective Trip Coordination with a High-Voltage Fuse

49
3
Selection and application
3-3 Selective trip applications
High-voltage fuse
JC type
Transformer
6/0.42kV
MCCB
● 3 φ 6.3kV/420V
Capacity (kVA) 100 200 300 500 750 1000
Secondary current (A) 137 275 412 687 1031 1375
Secondary short-circuit current (kA) 3.4 6.9 10.3 17.2 25.8 34.4
JC type power fuse rated current (A) 20 30 50 60 75 100
MCCB type ELCB type
CB breaking
capacity (kA)
CB rated current (A)
BW32AAG– (2,3)P
○○○
EW32EAG–3P
○○○
1.5 5 to 32
＊＊＊＊＊＊
BW50AAG–(2,3)P
○○○
EW50AAG– (2,3)P
○○○
5 to 50
＊＊＊＊＊＊
BW32SAG–(2,3)P
○○○
EW32SAG–3P
○○○
2.5 3, 5 to 32
＊＊＊＊＊＊
BW50EAG–(2,3)P
○○○
EW50EAG–3P
○○○
5 to 50
＊＊＊＊＊＊
BW63EAG– (2,3)P
○○○
EW63EAG–3P
○○○
60, 63
＊＊＊＊＊＊
BW50SAG–(2,3)P
○○○
EW50SAG–3P
○○○
7.5 5 to 32
＊＊＊＊
BW63SAG–(2,3)P
○○○
EW63SAG–3P
○○○
60, 63
＊＊＊＊
BW50RAG–(2,3)P
○○○
EW50RAG–3P
○○○
10 10 to 50
＊＊＊＊
BW63RAG–(2,3)P
○○○
EW63RAG–3P
○○○
60, 63
＊＊＊＊
BW100EAG–(2,3)P
○○○
EW100EAG–3P
○○○
50, 60, 63, 75, 100
＊＊＊＊
BW125JAG– (2,3)P
○○○
EW125JAG–(3,4)P
○○○
30 15 to 75
＊
BW125RAG–(2,3)P
○○○
EW125RAG–(3,4)P
○○○
50
BW125JAG– (2,3)P
○○○
EW125JAG–(3,4)P
○○○
30 100 to 125
BW125RAG–(2,3)P
○○○
EW125RAG–(3,4)P
○○○
50
BW250EAG–(2,3)P
○○○
EW250EAG–3P
○○○
18 125
＊＊
BW250JAG–(2,3,4)P
○○○
EW250JAG–(3,4)P
○○○
30
＊
BW250RAG–(2,3,4)P
○○○
EW250RAG–(3,4)P
○○○
50
BW250EAG–(2,3)P
○○○
EW250EAG–3P
○○○
18 150 to 250
＊＊
BW250JAG–(2,3,4)P
○○○
EW250JAG–(3,4)P
○○○
30
＊
BW250RAG–(2,3,4)P
○○○
EW250RAG–(3,4)P
○○○
50
BW400EAG–(2,3)P
○○○
EW400EAG–3P
○○○
30 250
＊
BW400SAG– (2,3)P
○○○
EW400SAG–3P
○○○
36
BW400RAG–(2,3,4)P
○○○
EW400RAG–(3,4)P
○○○
50
BW400HAG–(2,3,4)P
○○○
EW400HAG–(3,4)P
○○○
70
BW400EAG–(2,3)P
○○○
EW400EAG–3P
○○○
30 300
BW400SAG– (2,3)P
○○○
EW400SAG–3P
○○○
36
BW400RAG–(2,3,4)P
○○○
EW400RAG–(3,4)P
○○○
50
BW400HAG–(2,3,4)P
○○○
EW400HAG–(3,4)P
○○○
70
BW400EAG–(2,3)P
○○○
EW400EAG–3P
○○○
30 350, 400
＊
BW400SAG– (2,3)P
○○○
EW400SAG–3P
○○○
36
BW400RAG–(2,3,4)P
○○○
EW400RAG–(3,4)P
○○○
50
BW400HAG–(2,3,4)P
○○○
EW400HAG–(3,4)P
○○○
70
BW630EAG–3P
○○○
EW630EAG–3P
○○○
36 500, 600, 630
BW630RAG–3P
○○○
EW630RAG–3P
○○○
50
BW630HAG–3P
○○○
EW630HAG–3P
○○○
70
BW800EAG–3P
○○○
EW800EAG–3P
○○○
36 700, 800
BW800RAG–3P
○○○
EW800RAG–3P
○○○
50
BW800HAG–3P
○○○
EW800HAG–3P
○○○
70
Note: 2 or 3 poles are entered for (2, 3), 3 or 4 poles are entered for (3, 4) and 2, 3 or 4 poles are entered for (2, 3, 4). The 3-pole 30A molded-case circuit breaker is
described as BW50AAG–3P030. The rated current described as “3A” is the rating applicable to a molded-case circuit breaker only.
Rangethatmayexceedtheallowable
time-currentrangeofthefuse
3-3-3 Selective trip coordination with a high-voltage fuse
This section describes selective trip coordination for a transformer primary-side high-voltage fuse and a
secondary-side molded case circuit breaker or earth leakage circuit breaker. The applicable range, however,
is within the short-circuit current determined by the transformer capacity and percentage of impedance for
the breaking capacity of the molded case circuit breaker or earth leakage circuit breaker. (Use caution for
the ranges marked with an asterisk (*).) This gives the secondary short-circuit current that is assumed to
have an impedance percentage of 4% of the transformer depending on the conditions of short-circuit current
calculation.