Vector SIMOVERT MASTERDRIVES 6SE70 VC Instrukcje Operacyjne Pobierz pdf (Strona 155)

Vector Control Chassis Type Frequency Converter Forming

SIEMENS AG 476 869 4070 76 J AB-74

SIMOVERT MASTERDRIVES Operating Instructions 13-1

13 Forming

If a unit has been non-operational for more than one year, the DC link

capacitors have to be newly formed. If this is not carried out, the unit

can be damaged when the line voltage is powered up.

If the unit was started-up within one year after having been

manufactured, the DC link capacitors do not have to be re-formed. The

date of manufacture of the unit can be read from the serial number.

(Example: A-J60147512345)

Digit Example Significance

1 and 2 A- Place of manufacture

1996

1997

1998

4 1 to 9

January to September

October

November

December

5 to 14 Not relevant for forming

The following applies for the above example:

Manufacture took place in June 1997.

During forming, the DC link of the unit is connected up via a rectifier, a

smoothing capacitor and a resistor.

As a result, the DC link capacitors receive a defined voltage and a

limited current, and the internal conditions necessary for the function of

the DC link capacitors are restored.

Motor-

connection

U2/T1

V2/T2

W2/T3

PE2

DC link

U1/L1

V1/L2

W1/L3

Inverter

C / L+ D / L-

PE1

Disconnect

AC R

Forming

3AC

Pre-charging

Rectifier

Fig. 13-1 Forming circuit

How the serial

number is made up

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 161 162

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Vector SIMOVERT MASTERDRIVES 6SE70 VC Instrukcje Operacyjne Strona 155

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