ESAB SVI-450i cvcc Power Source for 575-Volt Service Troubleshooting instruction

SUPPLEMENT to Form 15-071

SVI-450i cvcc POWER SOURCE FOR 575-VOLT SERVICE

Part No. 31955

F-15-072

July, 1995

I. General

This supplement covers the SVI-450i Power Source
specifically designed for 575 Volt — 60 Hertz service. It
is identical to the standard SVI-450i, P/N 31950 unit cov­ered in Form 15-071 except for the following:

IMPORTANT

As shipped from the factory, all 575-volt units are
hooked-up to operate “only” from a 575-volt input.
This unit “does not” contain a Voltage Changeover
Input Terminal Board assembly.

A. Replacement Parts:

Main Transformer Assy. (MTR) - P/N 31685 replaces
P/N 31133.
Control Transformer Assy. (CTR) - 31686 replaces
P/N 31134.
Power P.C. Board Assy. (PB1 and PB2) - P/N 31423
replaces P/N 674991.
Capacitors (C5 and C6) - P/N 672348 replaces
P/N 950516.

II. Form 15-071 is applicable to this unit except

as follows:

A. See Revised Specification Table following.

B. See Revised Table for Recommended Input Con-

ductors and Line Fuses.

Note that the customer can either use the factory sup­plied input power cable (No. 6 AWG, 4/c, type SO,
90° C, 12-ft. 19.), or provide his own leads per the
Input Table.

Rated Input Input & Gnd. Time-Delay

Conductor Fuse Size

Volts Amps CU/AWG Amps

575 29 8 50

* Sized per National Electrical Code for 90° C rated copper con-

ductors @ 30° C ambient. Not more than three conductors in
raceway or cable. Local codes should be followed if they specify
sizes other than those listed above.

SPECIFICATIONS

Rated Output @ 60% Duty ................. 450 amps @ 38 vdc

Open Circuit Voltage ................................................. 72 vdc

Input Voltage ...................................... 575 vac, 3 ph, 60 Hz

Input Current Rated Load .................. 29 amps @ 575 vac

Dimensions:

14.25" (362 mm) w x 23.0" (584 mm) d x 15.5" (394 mm) h

Weight ..........................................................115 Ibs (52 kg)

C. Changes To Troubleshooting Section Vl, as fol-

lows:

All resistance and (low) voltage check readings de­scribed in 15-071 are applicable to this unit, except
those designated with the symbol H.V. . This symbol
indicates “high” voltage checks which are not appli­cable and cannot be safely made in this unit because
it does not contain an input terminal board-reference
the Capacitor Warning in the booklet (15-071).

D. Revised Wiring Diagram Contained Herein.

E. Revised Schematic Diagram Contained Herein.

Be sure this information reaches the operator.
You can get extra copies through your supplier.

D-31956

2

Schematic Diagram - SVI-450i, cvcc, 575 VAC

D-31957

Wiring Diagram - SVI-450i cvcc, 575 VAC (Sheet 1 of 2)

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D-31957

F-15-072 7/95 1C

Wiring Diagram - SVI-450i cvcc, 575 VAC (Sheet 2 of 2)