ESAB MultiPower 460 Pulse Instrukcja Obsługi Pobierz pdf (Strona 42)

SECTION 5 MAINTENANCE

C2 E1

Set the VOM to ohms then check for continuity between all the legs of the IGBT. No continuity should be measured. Place

the red probe to the Collector (C1) and the black probe to the Emitter ( E1). The VOM should read very high resistance or an

open circuit. No shorts (continuity) should be measured. Repeat the steps on the second IGBT pair (C2 E2). This ensures

the IGBT is turned oﬀ.

Insulated Gate Bipolar Transistor (IGBT)

C2 E1

Place a DC power source (9 v battery) on the gate leads of the same IGBT. First the negative source on the gate with the

positive source on the emitter. This should not change the meter reading. Next place the positive source on the gate and

the negative source on the emitter. This should turn on the IGBT.

NOTE

The power source should be more the

6 volts and less than 20. A 9 volt bat-

tery is common and works quite well.

G. IGBT Handling and Replacement (continued)

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 68 69

Brak uwag

ESAB MultiPower 460 Pulse Instrukcja Obsługi Strona 42