Tweco Maximizer 300 Torch for BNFL - Manual (Page 15)

Manual 0-2990 2-1 INTRODUCTION
SECTION 2:
INTRODUCTION
2.01 Scope of Manual
This manual contains descriptions, operating instructions
and maintenance procedures for the Liquid Cooled Maxi-
mizer 300 Torch and Torch Supply Leads Assemblies. Ser-
vice of this equipment is restricted to properly trained
personnel; unqualified personnel are strictly cautioned
against attempting repairs or adjustments not covered in
this manual, at the risk of voiding the Warranty.
Read this manual thoroughly. A complete understand-
ing of the characteristics and capabilities of this equip-
ment will assure the dependable operation for which it
was designed.
2.02 General Description
NOTE
Refer to Section 2.05, Introduction To Plasma, for
a more detailed description on plasma theory.
The Liquid Cooled Maximizer 300 Torch is a liquid cooled
torch that provides cutting capacity of up to 2 inches (50.8
mm), or 1 inch (25.4 mm) for production speed cutting,
at 300 amperes. In the torch, two torch leads provide
plasma and secondary gas to the torch head. The leads
also provide the closed loop for the liquid coolant flow
from the Power Supply.
Plasma torches are similar in design to the common au-
tomotive spark plug. They consist of negative and posi-
tive sections which are separated by a center insulator.
Inside the torch, the pilot arc is initiated in the gap be-
tween the negatively charged electrode and the positively
charged tip. Once the pilot arc has ionized the plasma
gas, the superheated column of gas flows through the
small orifice in the torch tip, which is focused on the metal
to be cut. The torch connects to fittings inside the Arc
Starter Box.
2.03 Specifications & Design
Features
A. Maximizer 300 Torch
The following applies to the Liquid Cooled Maximizer
300 Torch only:
1. Maximizer 300 Torch Configuration
Maximizer 300 Machine Torch is supplied with a
Mounting Tube in a 90° Torch Head configura-
tion. The Torch includes a trigger guard.
A-03728
2. Torch Leads Length
Torch leads are available in a 50 foot (15.2 m)
length. Lead lengths are from the Arc Starter Box
to the Torch Head Assembly .
3. Torch Ratings
Ambient
Temperature
104° F
(40° C)
Duty Cycle
100% @ 300 Amps @ 0.5 gpm
(1.89 lpm) Coolant Flow Rate
Maximum Current 300 Amps
Voltage (V
peak
) 500V
Arc Striking Voltage 12 kV
Torch Ratings
4. Cutting Range
• Production speed cutting:
3/4 inch (19 mm) at 150A
1 inch (25.4 mm) at 300A
• Maximum capacity when edge starting:
2 inch (50.8 mm)
5. Pierce Rating
3/4 inch (19 mm) at 150A
1 inch (25.4 mm) at 300A