TM-716 Page 12 MSW And LMSW Series
1 Input Power Plug
Provides connection for line input
power.
2 Start Switch S1
Turns weld current On/Off.
3 Main Transformer T1
Supplies power to weld output cir-
cuit. The transformer steps up the
current and steps down the voltage.
Resistance spot welds are made
with very low voltage (1-3 volts)
and with very high current
(4000-5000 amperes) applied un-
der pressure for a brief time period
(1-3 seconds) which causes in-
tense localized heating and a weld.
Main
Transformer
T1
3
Weld Current Circuit
AC Control Circuits
1 Power
Single-Phase
Line Input
Power
Input
1
Power
Plug
Start
2
Switch
S1
For Models Without A Timer
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