Tweco RAS-1000 User Manual

82 Benning Street, West Lebanon, NH 03784 USA

[phone] • www.thermal-dynamics.com

Manual 0-4736

Remote Arc Starter

Model RAS-1000,

Catalog # 3-9130

Installation Instructions

Scope

These instructions cover the RAS-1000 Remote Arc Starter.
Installation and service 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 these instructions thoroughly. A complete understand­ing of the characteristics and capabilities of this equipment will
assure the dependable operation for which it was designed.

General Description

The Remote Arc Starter is for use with Thermal Dynamics
UltraCut® Plasma Cutting Systems only. Do not use this
device with any other equipment.

The Remote Arc Starter generates a high - frequency pulse
to start a pilot arc for a Thermal Dynamics Plasma Cutting
Torch. The Remote Arc Starter includes a liquid cooled
coil. The power supply circulates coolant through the
Remote Arc Starter and through the torch. A wire harness
connected to the plasma power supply controls the opera­tion of the Remote Arc Starter.

Installation

The Remote Arc Starter must be installed in a suitable lo­cation near the torch head. If the Arc Starter is mounted to
a gantry or any other support subject to motion or vibra­tion, the installer must fasten the Arc Starter to the support
securely.

A. Preparation

1. Loosen, but do not remove, the lower screws securing
the cover to the Arc Starter. Remove the upper screws
securing the Cover Panel to the Arc Starter.

NOTE

A ground wire connects the cover to the Arc Starter
base. This wire must remain in place.

2. Remove the Cover Panel.

Upper screws (4 per side)

Cover

Specifications

12" / 305 mm

Ground Wire

Lower screws

7"

178 mm

10.5" / 267 mm

Art # A-04747

19 lb / 8.6 kg

Dimensions (Input Side Shown)

© 2005 Thermadyne Corp.

January 3, 2006 1 Manual 0-4736

Art # A-07029

3. Position the Arc Starter on a flat, horizontal, mount­ing surface.

4. Use pre-drilled holes in at least two of the feet on
the bottom of the Arc Starter to secure the Arc Starter
to the mounting surface.

Minimum 2

Art # A-04749

B. Input Connections

1. Refer to the illustrations. Make the following in­put connections to the Arc Starter.

Art # A-04751

Green

Coolant Supply (Green)

Coolant Return (Red)

Red

Coolant

Return

(Red)

• Coolant Supply and Return Hoses from power

supply. The fittings and hoses are color-coded;
Red for Return, Green for Supply.

Art # A-04750

Coolant Supply and Return Hoses
(from power supply)

• NEGATIVE Cable (from Power Supply rear
panel)

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Art # A-04752

Art # A-04754

Negative Cable

from power supply

• PILOT Return Cable (from Power Supply rear
panel)

Negative Cable

(for > 150 Amps)

• CONTROL Cable from Power Supply rear
panel.

Art # A-04755

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C. Output Connections

1. Refer to the illustrations. Make the following input connections to the Arc Starter.

• Pilot Return Cable (to Torch)

Inner Shield Lead

Pilot Lead

Art # A-04933

Inner Shield
Connection Detail

Pilot Lead
Connection Detail

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• Coolant Supply and Return Hoses (to Torch)

Art # A-04757

Reinstall the Arc Starter Cover. Ensure that the ground

wire is not crimped between the cover and the base
assembly.

Upper screws (4 per side)

Coolant Return Fitting
(Tagged with Red)

Coolant Return (Red)
from Torch

Some items are removed
for clarity.

Coolant Supply Fitting
(Tagged with Green)

Coolant Supply
(Green) to Torch

Cover

Ground Wire

Lower screws

Art # A-07029

The Arc Starter must be grounded; the grounding ter-

minal is marked .

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NOTE

Art # A-04758

Torch Leads

1 Nut and 1 Washer
Remain in Place

Ground Cable

• Use a clamp to secure the Torch Lead Shield
braid to the port on the Remote Arc Starter as
shown.

Every effort has been made to provide complete
and accurate information in this manual.
However, the publisher does not assume and
hereby disclaims any liability to any party for
any loss or damage caused by errors or omis­sions in this Manual, whether such errors re­sult from negligence, accident, or any other
cause.

Art # A-04759

Torch Leads Shield

Shield Clamp

Coolant and Pilot Leads
to Torch Valve Assembly

This completes the installation of the Remote Arc

Starter.

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