Fuji Electric EW32EAG

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Selection and application

3-6 Applications on the primary side of transformers

Table 3-15 Selecting MCCB for transformer primary circuit (Single-phase)

Single-phase, 400-440V/210-105V Transformers

Transformer capacity (kVA) 0.5 1.0 1.5 2.0 3.0 5.0

In: Rated primary current (rms A) 1.1 2.3 3.4 4.5 6.8 11.4

Irush: Exciting inrush current (rms A)

28.4 56.8 85.2 113.6 170.5 284.1

Short-circuit

current at 440V

1.5 (kA) BW32AAG–2P003 BW32AAG–2P010 BW32AAG–2P015 BW32SAT–2P015

2.5 (kA) BW32SAG–2P003 BW32RAG–2P010 BW32SAG–2P015 BW32SAT–2P015

7.5 (kA) BW50SAG–2P010 BW50SAG–2P015 BW50SAT–2P015

10 (kA) BW50RAG–2P015 BW50RAG–2P020 BW50RAG–2P030

18 (kA) BW125JAG–2P015

30 (kA) BW125JAG–2P015

36 (kA) BW125RAG–2P015

50 (kA) BW125RAG–2P015

65 (kA) BW50HAG-2P015

Transformer capacity (kVA) 7.5 10 15 20 30 50 75 100

In: Rated primary current (rms A) 17.0 22.7 34.1 45.5 68.2 113.6 170.5 227.3

Irush: Exciting inrush current (rms A)

426.1 568.2 852.3 1136.4 1704.5 2840.9 4261.4 5681.8

Short-circuit

current at 440V

1.5 (kA)

BW32SAT–2P030 BW50SAT–2P045 BW125JAT–2P060 BW125JAT–2P090 BW250EAT–2P175 BW400EAT–2P300 BW400EAT–2P400

2.5 (kA)

BW32SAT–2P030 BW50SAT–2P045 BW125JAT–2P060 BW125JAT–2P090 BW250EAT–2P175 BW400EAT–2P300 BW400EAT–2P400

7.5 ( kA)

BW50SAT–2P030 BW50SAT–2P045 BW125JAT–2P060 BW125JAT–2P090 BW250EAT–2P175 BW400EAT–2P300 BW400EAT–2P400

10 (kA)

BW50RAG–2P040 BW63RAG–2P060 BW125JAT–2P060 BW125JAT–2P090 BW250EAT–2P175 BW400EAT–2P300 BW400EAT–2P400

18 (kA)

BW125JAG–2P060 BW125JAT–2P060 BW125JAT–2P090 BW250EAT–2P175 BW400EAT–2P300 BW400EAT–2P400

30 (kA)

BW125JAG–2P060 BW125JAT–2P060 BW125JAT–2P090 BW250RAT–2P175 BW400EAT–2P300 BW400EAT–2P400

36 (kA)

BW125RAG–2P060 BW125RAG–2P075 BW125RAG–2P125 BW250RAT–2P125 BW250RAT–2P175 BW400RAT–2P300 BW400RAT–2P400

50 (kA)

BW125RAG–2P060 BW125RAG–2P075 BW125RAG–2P125 BW250RAT–2P125 BW250RAT–2P175 BW400RAT–2P300 BW400RAT–2P400

65 (kA)

BW125HAG–3P060 BW125HAG–2P075 BW125HAG–2P125 BW250HAG–2P150 BW400HAG–2P250 BW400HAG–2P400

−−

Note: A peak inrush current of 25 times the rated current is used in the calculations.

Single-phase, 200-220V/100-115V Transformers

Transformer capacity (kVA) 0.5 1.0 1.5 2.0 3.0 5.0

In: Rated primary current (rms A) 2.3 4.5 6.8 9.1 13.6 22.7

Irush: Exciting inrush current (rms A)

56.8 113.6 170.5 227.3 340.9 568.2

Short-circuit

current at 220V

2.5 (kA)

BW32AAG-2P010 BW32AAG-2P015 BW32SAT-2P015 BW32SAT-2P020 BW32SAT-2P030

5 (kA)

BW32SAG-2P010 BW32SAG-2P015 BW32SAT-2P015 BW32SAT-2P020 BW32SAT-2P030

10 (kA)

BW50SAG-2P010 BW50SAG-2P015 BW50SAT-2P015 BW50SAT-2P020 BW50SAT-2P030

25 (kA)

BW50RAG-2P010 BW50RAG-2P015 BW50RAG-2P020 BW50RAG-2P030 BW50RAG-2P040 BW63RAG-2P060

36 (kA)

BW125JAG-2P015 BW125JAG-2P075

50 (kA)

BW125JAG-2P015 BW125JAG-2P075

85 (kA)

BW125RAG-2P015 BW125RAG-2P075

100 (kA)

BW125RAG-2P015 BW125RAG-2P075

125 (kA)

BW50HAG-2P015 BW50HAG-2P075

Transformer capacity (kVA) 7.5 10 15 20 30 50 75 100

In: Rated primary current (rms A) 34.1 45.5 68.2 90.9 136.4 227.3 340.9 454.5

Irush: Exciting inrush current (rms A)

852.3 1136.4 1704.5 2272.7 3409.1 5681.8 8522.7 11363.6

Short-circuit

current at 220V

2.5 (kA)

BW50EAT-2P045

BW100EAT-2P075

BW125JAT-2P100