Operation; General - Hobart 6T28-600CL Operation And Maintenance Manual

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
Section 3
IMPORTANT
Before attempting to operate the converter, read this entire section to become fully
familiar with how the converter operates.

1) General

This section contains information for safe and efficient operation of the equipment. Operating instructions
are presented in step-by-step sequence of procedures to be followed in supplying 28 V DC to an aircraft
or similar load.
WARNING
Electric shock and fire can kill! Read and understand all operating instructions before
attempting to operate the equipment. Operation attempts by untrained personnel can
endanger people, this equipment, and the load. Do not attempt to operate the
equipment for uses not approved by the manufacturer, or at input and output ratings
not listed in the specification table located in 1-1, Figure 3.
The repeated opening of input fuses or repeated functioning of the overload trip circuitry indicates a
misapplication, a faulty main component, or an improper connection or load. Correct the problem by
following the instructions in Chapter 2 before attempting to operate the power supply. Be certain that a
input disconnect means is readily accessible between the power input source and this DC power supply.
You may need to quickly isolate the DC power source from all power during an emergency, fire, or
equipment malfunction.
2) Normal and Bridge Preparation
a) Normal Preparation
(1) Verify input power is disconnected at source.
(2) Verify that the supply-input connections agree with the input voltage available by comparison to
the voltage changeover diagram.
(3) Connect output cable between load and the proper connection points in the DC power supply.
(4) When all covers or panels are in place, turn on the source of input power.
(5) Set R13 start level control knob (1-1, 8, Figure 4) to the output surge limit required for your load.
b) Bridge Preparation
(1) Perform steps a) – e) under Normal Preparation.
(2) Place S1 Input Contactor Switch in ON position (1-1, 10, Figure 4).
December 15, 2014

Operation

Chapter 1-3
Page 1