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Howard Industries Mobile Power
transformers are specially designed
for use with mobile power systems
and are the ideal choice for applications
requiring step-up transformation
and interconnection with an electrical
distribution grid. These rugged
transformers can take all the abuse a
transportable system typically
receives. And, they are specially
designed and equipped for the rental
power market, with many valuable
features that improve portability and
increase flexibility for use with
different grid voltages.
Contact the factory or your local
Howard Industries representative for
more information about our Mobile
Power transformer line and about the
many custom solutions we can offer. |
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| Ratings |
• 45, 75, 112.5, 150, 225, 300, 500, 750, 1000,
1500, 2000, 2500, 3000, 3750, 5000 kVA
and 10000 kVA
• Standard high-voltage ratings: 14400 Volts delta,
with taps at 13800, 13200, 12870, 12470, 12000, and 11700 Volts.
Optional high-voltage ratings from 2400 through 19920 Volts
• Standard low-voltage rating: 480Y/277 Volts.
Optional low-voltage ratings from 120 through 600 Volts
• Standard frequency: 60 Hertz
Optional frequency: 50 Hertz
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| Standard Features |
• Designed and manufactured in accordance with all applicable
IEEE/ANSI and NEMA standards
• Non-loadbreak high-voltage tap switch with operating handle
located in the high-voltage compartment
• Externally clamped porcelain high-voltage
bushings with spade terminals (live-front construction)
• Mounting provisions for lightning
arresters in the high-voltage
• Externally clamped epoxy or porcelain low-voltage bushings
with integral spade terminals
• Removable neutral ground strap in
low-voltage compartment
• Lifting provisions
• Jacking and rolling provisions
• Removable steel forklift channels
• Removable terminal compartment
and front sill
• Tamper resistant removable tank
access cover
• Three-point door latching system with padlock provision and
recessed interlocking pentahead security bolt
• Tank grounding provisions
• Welded mild steel tank construction
with mild steel terminating
compartment
• Mild steel barrier between highvoltage
and low-voltage
compartments
• Corrosion resistant hardware
• Recessed tank compartment
bottom
• Domed covers on tank and terminal
compartment
• Electrostatically applied powder paint finish with
polyurethane topcoat (ANSI 70 light gray)
• Oil fill/oil level plug
• Oil drain valve with sampling device
• Automatic pressure relief device
• Dial-type liquid level gauge
• Dial-type liquid temperature gauge
• Electrical grade mineral oil
insulating fluid with oxidation
inhibitor
• Laser engraved nameplate
• Bushing designation labels
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| Optional Features |
• Insulated interphase barriers
• Lightning arrester mounting
provisions (live front construction
only)
• Two 2.5% high-voltage taps above and below normal voltage,
or four 2.5% high-voltage taps below normal voltage,
or four 2.5% taps above normal voltage, or no high-voltage taps
• Dual high-voltage rating with nonloadbreak switch handle located
in the high-voltage compartment (not available in combination
with high-voltage taps)
• High-voltage fuses, including internal expulsion fuses, draw-out
expulsion fuses, internal backup current limiting fuses,
and draw-out full-range current limiting fuses in
dry-well canisters
• Internal load-break high-voltage ON/OFF switch with operating
handle located in the high-voltage compartment
• Stainless steel tank and
terminating compartment
• Cover mounted high-capacity
pressure relief device
• Beta, silicone, or seed-based
vegetable oil insulating fluid
• Cooling fans with control or fan
mounting provisions only
• Mounting provisions for external
electricity meter
• Hexhead security bolt (pentahead
standard)
• Temporary service access provision
(conduit hole) in terminal
compartment sill
• Optional topcoat paint color: ANSI 49 light gray, ANSI 61 light gray,
ANSI 24 dark gray, olive green (Munsell 7GY3.25/1.5), or white
• Tank grounding connectors
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