Miller 244584, Руководство пользователя

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OM-237519 Page 16
Duty Cycle For Narrow Air-Cooled Blankets
D. Narrow Blanket Arrangement
Input Power
Supply
Induction
Power Source
Blanket
(Wrap Or Flat)
One Half Of Output Amperes Thru
Each Blanket
Blanket
(Wrap Or Flat)
Extension
Cable
Optional
On/Off
Remote
A two narrow blanket parallel arrangement requires two equally sized blankets and two extension cables connected to a single power source. One
blanket should be positioned on each side of the weld joint approximately four inches apart and equally spaced from the joint. In order to achieve full
power from the power source, the extension cables should be connected to the blankets as follows: cable A to blanket lead 1 and cable B to blanket lead
2 for one blanket; cable A to blanket lead 2 and cable B to to blanket lead 1 for the other blanket (see Section 4-3B). The output power from the power
source will divide equally between the two blankets (assuming both blankets are in direct contact with the surface of the material to be heated). The
power source will typically deliver approximately 500 amperes in this arrangement (~250A per blanket). For short duty cycle operation (less than 15
minutes) the wire in the blankets can withstand this current level. If operating at longer duty cycles (greater than 15 minutes), the power source will
automatically reduce the output current (~300A total, ~150A per blanket) to prevent damage to the blankets.