4. SECONDARY RECTIFIER CARD Z003
The circuit of Z003 is a full wave rectifier. It rectifies the secondary current. There are (8+8) diodes (V1-V16) in parallel
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in the unit
Capacitors (C1-C4) and resistors (R2, R4, R6, R8) form a snubber circuit. The snubber reduces the voltage stress of the
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diodes after the reverse recovery current snaps off (The voltage stress is caused by leakage inductance and stray ca-
pacitance oscillation)
Capacitor C5, diode V17 and resistors (R9 and R10) form a filter circuit which reduces open circuit voltage ripple. Filter
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circuit is needed for controlling open circuit voltage
Varistors (R1, R3, R5, R7) are for TIG ignition spark protection
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4.1. Connectors
Kemppi OY
SERVICE MANUAL
FASTMIG X
Connector
Description
X1
Main transformer
X2
Main transformer
X3
Main transformer
X4
Main transformer
X5
Not in use
X6
Not in use
X7
Not in use
X8
Not in use
X9
Main transformer
9 (37)