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This
is an interesting recent industrial project
that we completed in 2025 for Mid America Car
- a leading American manufacturer of high quality
custom railway cars.
The
main role of this 20kW 68 Volt DC Polar Power
diesel generator is to provide power to a 6,000
VA 68 Volt DC DC to 120 Volt AC Converter used
to operate the air temperature control systems
and provide some 120 Volt AC power for some
other devices.
Here
is a breakdown of what was included in this
order:
1.
Polar Power 20kW, 64V, Yanmar 3TNV88,
16-14-8340-01-52-1 74 – 12 VOLT DC-DC diesel
generator
Model number: F020D270MGA01
Includes: DB-F340-01A: DUAL DIODE BRIDGE, 340A
OUT, W/ TRANSDUCER EN-FDYA-01A: ENCLOSURE, STEEL
OPEN FRAME, YANMAR 3TNV88 EC-F015-01A: ENGINE/SYSTEM
CONTROL PANEL, OPEN FRAME
We
will also supply a high volume oil pan. With
synthetic oil and our oil refining kit, we could
extend oil changes to 500 hours. Currently,
it’s 250 hours. We also supply an engine mounting
cradle.
Base
engine measurements: Length: 24.7 in (627.4
mm). Please add approx. 6” to length for the
Polar alternator attachment.
Width: 20.2 in (513.1 mm) Height: 26.2 in (665.5
mm) Dry Weight: 326 lbs / 148 kg. Add 40 pounds
for Polar Alternator.
2 year limited Warranty.
2.
SUPERCAP starting system
Model number: 84-28-0001
3.
JUMP START KIT (BRACKET, MODULE, FILTER CAPACITOR,
HARNESS) ALUM RADIATOR W/ 12V COOLING FAN, OPEN
FRAME Model number: MS-20-16-0500
4.
MUFFLER EXHAUST SYSTEM, YANMAR 3TNV88
Model number: ES-FDYA-01A
5.
POWER OUTPUT DISTRIBUTION PANEL, 300A
Model number: PD-F340-01A
6.
BATTERY MONITORING KIT, 20M
Model number: 08-13-0039-655
7.
DC To DC charger This is required and connects
to your 64 Volt battery pack and recharges the
Supercapacitor starting system.
8.
Polar Power fuel filtration system Fuel refining
kit. This will not help with water, but will
help with particulates. A water separator and/or
polisher would be required to eliminate water
from the fuel.
9.
EKRail 6,000 VA 120VAC output inverter.
Please note this is two independent 3,000 VA
inverters sharing the same chassis. You will
need to wire each inverter’s output to its own
separate 30 Amp 120VAC circuit breaker panel.
Specification:
Input:
Voltage 74 Vdc nominal, 64 to 89 Vdc
Current 46 Amperes @74 Vdc and 3000 VA load
per channel (2 channels)
Output:
Voltage 117 Vac ±5% over full operating range
Power 3000 Va nominal, 3100 Va (max) (per channel)
Current limit 27 Amperes rms
Load regulation 5% from no load to max load
Waveform Sinusoidal (THD ‹5%)
Frequency 60 Hz ±1 Hz
Load power factor 0.7 lead to 0.7 lag
Efficiency =85% at nominal load Indicators
DC input On when voltage present and within
operating range
Flashing when voltage present and over or under
range
AC output ON when available
Flashing when not available due to over temperature
OFF when overcurrent
Fault Indicator ON when input fuse is open
Protection:
Over-current Cut-off after 2 seconds, automatic
reset after 30 seconds
Input overvoltage Shutdown above 90 Vdc
Input undervoltage Shutdown at 64 Vdc
Restart at 69 Vdc
Overload Output thermally protected
Over Temperature Cutoff at +100ºC(212F), restart
at +90ºC(194F) (Internal temperature)
Input reverse polarity Protected
Input protection Fuse, surge suppression and
filter.
Isolation Transformer, floating output
Environment:
Operating temp. -40°F to 158°F (-40°C to 70°C)
Storage temp. -40°F to 185°F (-40°C to 85°C)
Dimension 14.25’’H 18.43’’ L 9.5’’ D
Weight 108 Lbs. (49.09 kg)
Option Control input (Must be define when ordering)
Warranty: 2 years.
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