7
Startup sequence
Instruction manual
IM1002004E September 2015 www.powerquality.eaton.com
Startup sequence
WARNING
There are dangerously high voltages present within
the enclosure of the power supply system. Caution
must be taken when working with the enclosure. It is
recommended that all work be performed by qualified
electrical personnel only.
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Initial startup should be performed with no-load
on system.
1. Re-install all panels that may have been removed
during installation.
2. Make sure the input circuit breaker is in the OFF position.
3. Energize the primary building power.
4. Turn on the main AC input breaker.
5. Verify that the output voltage is within the
specified range.
6. Verify output phase rotation is correct.
7. Turn the system off.
8. Connect the loads one at a time and repeat Step 5.
Preventive maintenance
WARNING
Danger of electrical shock. Turn off all power supplying
this equipment prior to maintenance.
To ensure longer component life and trouble-free operation,
minor preventive maintenance procedures should be
performed at regular intervals, for example once every
year. More frequent inspection intervals would be needed
for more severe operating conditions and larger number of
hours of continuous operation.
A. Remove top and side panels and at each service
inspection any accumulated dust, dirt or foreign particles
should be carefully removed. Special care should be
exercised in cleaning the thyristors, heat sinks, and the
control assembly.
B.
Inverse parallel silicon rectifiers (SCRs) or thyristors
:
The silicon controlled rectifiers (SCRs) usually fail in the
shorted mode. When this happens, normally the fusible
link in series with the SCR will be blown open to clear
the short and prevent damage to the transformers. The
individual SCR can be checked with an ohmmeter. Refer
to
page 8
for resistance checking procedures.
C. Replace top and side panels. Turn unit on with no load.
D. Turn on loads.
E. Check to verify all fans are operational.
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Preventive maintenance plans are included on
page 38
of the manual.
General troubleshooting guide
Table 4. General Troubleshooting Guide
Symptom
Probable causes
1. No output on one or
more phases
A. Blown fuse
B. Defective SCR or power module
C. Defective control card
D. Defective sense card
E. No input
2. Output is too high or too low
A. Control card adjustment
B. Defective control card
C. Defective sense card
D. Defective SCR or power module
E. Input out of range
3. Input breaker tripping off
A. Defective breaker
B. System overloaded
C. Over/undervoltage detection is shutting
down system (see symptom #2)
D. Defective over/under detection card
E. Shorted taps
4. Blowing semi-conductor fuses A. Shorted SCRs or power modules
B. Output loads shorted
5. No output voltage
A. Defective over/under output
detection PCB
WARNING
There are dangerously high voltages present within
the enclosure of the power supply system. Under no
circumstances should any person reach within the
enclosure of this equipment. All service to this piece
of equipment should be performed by qualified
personnel only.
Troubleshooting
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Circuit diagrams in this manual are for reference only.
Always refer to the actual circuit diagrams received
with the system.
Introduction
This procedure is written in a specific order and must be
used from start to finish when troubleshooting. Any steps
skipped over may cause serious damage to the system.
