Hager NBN125A Manual

Hager Ikke kategoriseret NBN125A

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Side 1/5

4.44 General Catalogue • Protection Devices • Technical

Transformer/Motor Protection

Transformer Protection

Tables 19 & 20 show the recommended MCB’s for the protection of

single phase (230V) and three phase (400V) transformers.

Single Phase 230V

Recommended MCB

Transformer

Rating (VA)

Primary

Current

NBN NCN NDN

50 0.22 - 1 6

100 0.43 - 2 6

200 0.87 - 3 6

250 1.09 6 4 6

300 1.30 10 4 6

400 1.74 10 6 6

500 2.17 16 10 6

750 3.26 16 10 6

1000 4.35 25 16 10

2500 10.87 63 40 20

5000 21.74 - 63 32

7500 32.60 - - 50

10000 43.48 - - 63

Three Phase 400V

Recommended MCB

Transformer

Rating (VA)

Primary

Current

NBN NCN NDN

500 0.72 - 3 6

750 1.08 6 4 6

1000 1.44 10 6 6

2000 2.88 16 10 6

3000 4.33 25 16 10

4000 5.77 32 20 10

5000 7.21 40 25 16

7500 10.82 63 32 20

10000 14.43 - 50 25

15000 21.64 - 63 32

20000 28.86 - - 50

25000 36.07 - - 63

Motor Circuit Protection

Tables 28,29,30 and 31 give general recommendations for the

selection of circuit breakers and HRC fuses for the protection of

motor power circuits and are based on the assumptions shown in

Table 28 for a cage motor running at approximately 1400 Rev/Min.

Motor Rating DOL Starting

Conditions

Assisted Start Conditions

Up to 0.75kW 5 x FLC for 6 secs 2.5 x FLC for 15 secs

1.1 to 7.5kW 6 x FLC for 10 secs 2.5 x FLC for 15 secs

11 to 75kW 7 x FLC for 10 secs 2.5 x FLC for 15 secs

90 to 160kW 6 x FLC for 15 secs 2.5 x FLC for 20 secs

1 Phase 230V DOL Starting

Recommended Circuit Breaker

kW hp FLC A (A)

NBN

(A)

NCN

(A)

NDN

Fuse

(A)

0.18 0.25 2.8 16 10 10 10

0.25 0.33 3.2 16 10 10 16

0.37 0.5 3.5 16 10 10 16

0.55 0.75 4.8 20 16 16 16

0.75 1.0 6.2 25 20 20 20

1.1 1.5 8.7 40 25 25 25

1.5 2.0 11.8 50 32 32 32

2.2 3.0 17.5 - 50 50 40

3.0 4.0 20 - 63 63 50

3.75 5.0 24 - - - 63

5.5 7.5 36 - - - 80

7.5 10 47 - - - 100

3 Phase 400V Assisted Starting Star-Delta

Recommended Circuit Breaker

kW hp FLC A (A) NCN (A) NDN HRC Fuse (A)

3 4 6.3 16 10 16

4 5.5 8.2 20 10 16

5.5 7.5 11.2 32 16 20

7.5 10 14.4 40 25 25

11 15 21 50 32 32

15 20 27 - 40 35

18.5 25 32 - 50 40

22 30 38 - 63 50

30 40 51 - - 63

37 50 63 - - 80

45 60 76 - - 80

55 75 91 - - 100

75 100 124 - - 160

90 125 154 - - 200

110 150 183 - - 200

132 175 219 - - 250

150 200 240 - - 315

160 220 257 - - 315

4.45

Sales Service Centre • 01952 675612 Technical Support Helpline • 01952 675689

Transformer/Motor Protection

3 Phase 400V DOL Starting

Recommended Circuit Breaker

kW hp FLC A (A) NBN (A) NCN (A)

NDN

HRC

Fuse (A)

0.18 0.25 0.87 - 2 - 4

0.25 0.33 1.17 - 3 - 4

0.37 0.5 1.2 - 3 - 4

0.55 0.75 1.8 - 4 - 6

0.75 1.0 2.0 10 6 6 6

1.1 1.5 2.6 16 10 6 10

1.5 2.0 3.5 16 10 10 16

2.2 3.0 4.4 20 16 16 16

3.0 4.0 6.3 25 20 20 20

4.0 5.5 8.2 32 25 25 25

5.5 7.5 11.2 50 40 40 32

7.5 10 14.4 63 50 50 40

11 15 21 - - - 63

15 20 27 - - - 80

18.5 25 32 - - - 80

22 30 38 - - - 80

30 40 51 - - - 100

37 50 63 - - - 125

45 60 76 - - - 125

55 75 91 - - - 160

75 100 124 - - - 200

90 125 154 - - - 250

110 150 183 - - - 315

132 175 219 - - - 355

150 200 240 - - - 355

160 220 257 - - - 355

Protection

Devices

Produkt Specifikationer

Mærke:	Hager
Kategori:	Ikke kategoriseret
Model:	NBN125A
Dybde:	70 mm
Højde:	83 mm
Certificering:	EN 60898-1, IEC 60947-2
Indgangsstrøm:	25 A
Antal poler:	1
Nominel spænding:	400 V
Moduler, antal (maks.):	1 modul(er)
Nominel strøm (30 °C):	25 A
Strømbryder type:	Miniature strømafbryder
Smeltekurvetype:	Type B