5-13-1-100
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SERVICE BULLETIN
NOTICE:
The Type of Change and Recommended Compliance specified reflects Solar’s best judgment regarding the
Service Bulletin. All questions should be directed to your Solar Field Service Representative. Solar, Saturn,
Centaur, Taurus, Mercury, Mars, Titan, SoLoNOx, and Turbotronic are trademarks of Solar Turbines Incorporated.
Cat and Caterpillar are trademarks of Caterpillar Inc. Specifications subject to change without notice.
NUMBER:
5.13.1/100
ISSUED:
September 2000
REVISED:
PRODUCT:
All
MODEL(S):
All
Specifics:
Applies to all Turbotronic units with 24 VDC display computers
supplied directly from a 24 VDC distribution breaker.
SUBJECT: VOLTAGE SPIKE SUPPRESSION
Type of Change:
Product Enhancement
Recommended
Compliance:
Information
Purpose:
To inform customers of enhancements providing additional protection of 24 VDC control equip-
ment subject to high voltage spikes on the 24 VDC supply.
GENERAL INFORMATION:
Since 1996 Solar has supplied display computers in control consoles powered directly from the
24 VDC battery system (18-32VDC). Some applications in the field have experienced failures of
the power supply section of those computers. Analysis of the failed computers showed that the
power supply had been subjected to spike voltages in excess of 40 volts. Damaging ground spikes
have been found to occur when generating the arc on nearby welding equipment. Damaging signal
spikes have been found to occur when low performance battery chargers go into high charge. To
help protect against these spikes EMI filters conditioning the 24 VDC supply entering the consoles
were upgraded to EMI/surge/spike filters. All new production control systems are now configure
with the upgraded filter.
SERVICE BULLETIN
Page 1 of 2
NUMBER: 5.13.1/100
ACTION REQUIRED:
If you are having reliability problems on your display computer, verify that 24 VDC supply to the
display computer passes through an upgraded filter. If you do not have a configuration as described
in the recommended arrangement for surge/spike filters section, contact your local Solar Turbines
District Office for assistance.
Recommended Arrangement EMI/Surge/Spike Filters:
1.
24 VDC Battery Charger Systems:
a.
24 VDC from the battery charger splits and passes through one of two main circuit
breakers in the control console. After the main breakers the 24 VDC supply passes
through an EMI/surge/spike filter. Following the filters are separate distribution
breakers to each piece of equipment.
b.
Approved EMI/surge/spike filters:
I.
Solar part number 1022716-1. This is a 32 amp CSA class 1 div 2 filter
generally used in normal control systems driving the display PC.
II.
Solar part number 1022716-2. This is a 25 amp CSA class 1 div 2 filter
generally used for the backup shutdown system or in normal control system
on-skid boxes.
2.
120 VDC Battery Charger Systems:
a.
120 VDC power is converted to control 24VDC power through an integrated power
supply and EMI/surge/spike filter. The outputs of that power supply/filter then pass
on to the distribution breakers for the normal control system and backup shutdown
system equipment.
b.
Approved device:
I.
Solar part number 1021207-1. This is a double slot, 1200 watt, 50 amp, CSA
class 1 div 2 (pending) power supply with full EMI/surge/spike filters.
Page 2 of 2
SERVICE BULLETIN
NUMBER: 5.13.1/100
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