CIGWELD 200i Instruction Manual download pdf (Page 53)

TRANSTIG 300 AC/DC

January 16, 2008

11-1

SECTION 11:

VOLTAGE REDUCTION DEVICE (VRD)

11.01 VRD SPECIFICATION

TransTIG

Description 300 AC/DC Notes

VRD Open Circuit Voltage 15.3 to 19.8V Open circuit voltage between welding

terminals.

VRD Resistance 148 to 193 ohms The required resistance between

welding terminals to turn ON the

welding power.

VRD Turn OFF Time 0.2 to 0.3

seconds

The time taken to turn OFF the welding

power once the welding current has

stopped.

Table 11-1: VRD Specification

11.02 VRD MAINTENANCE

Routine inspection and testing (power source):

An inspection of the power source, an insulation resistance test and an earth resistance test should be carried

out.

a. For transportable equipment, at least once every 3 months.

b. For fixed equipment, at least once every 12 months.

The owners of the equipment shall keep a suitable record of the periodic tests.

NOTE

A transportable power source is any equipment that is not permanently connected and fixed in the

position in which it is operated.

In addition to the above tests and specifically in relation to the VRD fitted to this machine, the following

periodic tests should also be conducted by an accredited Cigweld Service Provider.

Description Required Parameters

VRD Open Circuit Voltage Less than 20V; at Vin=415V

VRD Turn ON Resistance Less than 200 ohms

VRD Turn OFF Time Less than 0.3 seconds

Table 11-2: Periodic Tests

If this equipment is used in a location or an environment with a high risk of electrocution then the above tests

should be carried out prior to entering this location.

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CIGWELD 200i Instruction Manual Page 53