Bosch 4306 Manuel de service télécharger pdf (Page 14)

• DOK-POWER*-KDV*2.3****-ANW1-EN-E1,44 • 06.97

Transformer power (kVA)

12.5

Mains contactor from Siemens

3TF44

3TF46

3TF47

3TF50

Secondary transf. nominal current (A)

25.1

31.4

37.7

45.2

50.3

62.8

88.0

3. Guidelines for installation and electrical connections

3.3. Fuse protection for the power connection

The KDV 2.3 mains connection can be protected by using either circuit

breakers or gL classsification fuses (slow-blow). Using power circuit breakers

has the advantage that faulty operation, with two phases, for example, is not

possible.

The protective device is generally placed on the primary side if a matching

transformer is used.

Figure 3.5: Selecting the mains contactor

Nominal (A)

current

14.5 25.1

18.1 31.4

21.7 37.7

26.0 45.2

28.9 50.3

36.1 62.8

50.6 88.0

Recommended

fuses of the

gL type

20 A slow-blow

25 A slow-blow

35 A slow-blow

50 A slow-blow

63 A slow-blow

Siemens power

circuit breaker

3V..

series

3VU1300-•MP00

3VU1600-•MP00

3VU1600-•MQ00

3VU1600-•MR00

3VF3111-5DN71

primary second.

Transf.

power

(kVA)

12.5

Setting

range

(A)

Setting

range

(A)

18 to 25

22 to 32

28 to 40

36 to 50

40 to 80

Fuses for

3 x AC 400 V mains

voltage

Maximum back-up fuse must be as per manufacturer's guidelines!

Figure 3.4: Fusing with 3 x AC 400 V mains voltage

If an INDRAMAT transformer is used and all connections are executed as

outlined in section 3.2 then fuses and protective circuit breakers with a mains

voltage of 3 x AC 400 V can be used (see table below).

Maximum permissible

fusing

secondary sideprimary side

3 x AC 220 V I

= 80 A --- ---

upto 3 x AC 240 V --- I

= 80 A I

= 80 A

upto 3 x AC 525 V --- I

= 63 A I

= 80 A

Nominal voltage fuse (gL) / power circuit breakerMains voltage

Figure 3.3: Maximum permissible fusing

3.4. Selecting the mains contactor

The following selection of transformers applies if power is connected on the

secondary side of the mains transformer (as per KDV 2.3 terminal diagram).

The choice must correspond to the nominal current of the secondary side of

the mains transformer. Peak making currents need not be considered because

of the KDV 2.3 charging current limitation.

connected without

matching transformer

connected with matching transformer

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 56 57

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Bosch 4306 Manuel de service Page 14

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