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Power Supplies - 25 KVA Power Substation - 480V to 120/240V 1PH - (12) 125V 5-20R Duplex Receptacles - Rotary Switch You're NOT logged in, Please log in   

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25 KVA Power Substation - 480V to 120/240V 1PH - (12) 125V 5-20R Duplex Receptacles - Rotary Switch

Part # MPD-DC-25KVA-480.240.208-120    Price: $10,519.56

Spec Sheet   

Wiring Diagram   

Made in Texas

The Larson Electronics MPD-DC-25KVA-480.240.208-120 power distribution substation converts 480V AC electrical current into single phase 120/240V AC. This unit provides operators the ability to safely tap into and distribute 480V AC power from a variety of sources including generators and direct grid power.


Portable Power Distribution Purpose and Use
The MPD-DC-25KVA-480.240.208-120 portable power distribution system gives operators the ability to power their 120 volt equipment from a single system. A rotary switch on the transformer is available for selecting the desired input voltage (480V, 240V or 208V). For safety, only one source disconnect on the primary side can be switched on at any given time. The disconnect being used to bring in the desired input voltage must match the selected input voltage on the rotary switch (and vice versa).

On the primary side, operators connect 480 volt, 240 volt or 208 volt line-in power via a customer provided cord. On the secondary side, operators connect to twelve 5-20R 125V duplex receptacles for 120V equipment.

Operation: Customer provided line-in cords bring 480V three phase power to the NEMA 3R 100-amp 480V three phase primary disconnect, which contains two 70-amp time delay fuses, or 240V three phase power to the NEMA 3R 200-amp 480V three phase primary disconnect, which contains two 125-amp time delay fuses, or 208V three phase power to the NEMA 3R 200-amp 480V three phase primary disconnect, which contains two 150-amp time delay fuses, and passes the selected input voltage in single phase through to the transformer. The NEMA 3R 25 KVA transformer converts the selected input voltage to 120/240V single phase and passes the current to the secondary panel. The secondary side of the transformer feeds a NEMA 3R 125-amp 120/240V single phase main lug only panel. This secondary panel contains twelve 20-amp breakers protecting twelve 20-amp 125V 5-20R duplex receptacles.

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Protective Construction: Unlike many portable power distribution boxes made of plastic and utilizing thin gauge, low grade metals in their construction, this unit is designed for serious use and is ruggedly constructed to withstand demanding conditions and heavy duty industrial applications. The transformer and load assembly is mounted on a 3/16" thick carbon steel mounting platform and the load center/distribution assembly is mounted to the standard 2" x 2" x 1/8" square carbon steel tubing frame, resulting in an extremely stable, durable and well protected power distribution platform. This model is equipped with forklift skid pockets, locking casters, and a top located lifting eyelet allows easy lifting with cable or chain hooks. This can be replaced with stainless steel, hot dip galvanized steel, or aluminum depending on the customer’s needs for an additional cost. Larger units are available upon request, and can be equipped with skids or trailer mounted.

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Click Photo to Enlarge
Click Photo to Enlarge

Certification: Larson Electronics is a UL 1640 panel shop and certified to build portable power distribution systems. All units are built in accordance to NFPA 70 (National Electric Code) and certified to UL 1640. All equipment is NEMA 3R rated for indoor and outdoor use and provide a degree of protection against dirt, water, and ice. NEMA 4 and NEMA 4x equipment can be equipped upond request.

Grounding: Transformer is grounded to the frame and we provide a grounding lug on the frame for the earth ground.
~Please check all motor loads for dual rated motors that will work 208 or 240.~

Applications: This power distribution system is ideal for indoor or outdoor use and applications including but not limited to, construction sites, plant maintenance, plant turnarounds, shows, exhibits, and shipyard operations. These power distribution systems are popularly used in applications where external power sources are often necessary. We also offer class rated transformers for use within explosion proof and hazardous location environments.

Custom Built Systems Available: Larson Electronics is a manufacturer and we can build portable power distribution systems to your specifications. Although we carry several models of portable power distribution systems in stock, we can deliver custom ordered units almost as quickly as our prebuilt units. If this model does not meet your needs, please contact us at 1-800-369-6671 or to discuss your specific requirements.

Specifications / Additional Information

MPD-DC-25KVA-480.240.208-120 Power Transformer
Line-In Cord: Customer Provided Max OCP Primary: 200A @ 480V
Line-In Cord Cap: Customer Provided Max OCP Primary: 125A @ 240V
Primary Voltage: 480V/240V/208V 3PH UL 1640 Portable Power-Distribution Equipment
Primary Disconnect: 480V 100A Fused @ 70A N3R, 480V 200A Fused @ 125A N3R, 480V 200A Fused @ 150A N3R NEMA 3R Indoor or Outdoor Use
Primary Panel: - Made in the USA
Primary Breakers: -
Primary Receptacles: -
Primary Protection: Disconnect Switches
Input Voltage Selection: Rotary Switch
Transformer: 25KVA 480V to 120/240V 1PH N3R
Secondary Voltage: 120/240V 1PH
Secondary Panel: 120/240V 1PH 125A MLO N3R
Secondary Breakers: (12) 20A
Secondary Receptacles: (12) 20A 5-20R [125V]
Secondary Protection: - Special Orders- Requirements
Form Factor: Square tube frame w/ 1/8" side walls, hinged access doors, skid pockets, top pick eye & locking 8” locking casters Contact us for special requirements
Frame Materials: Powder coated steel frame Toll Free: 1-800-369-6671
Dimensions: 48” X 48” X 62” Intl: 1-903-498-3363
Weight: 550 pounds E-mail:
*All grounding shall comply with state and local codes and meet the minimum requirements of the National Electronic Code section 250*
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Part #:MPD-DC-25KVA-480.240.208-120 (149719)
In Stock:Yes



Customer Rating:
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    Sale Prices in RED
Product  Part #PriceOption 1Option 2Option 3Qty
25 KVA Power Substation - 480V to 120/240V 1PH - (12) 125V 5-20R Duplex Receptacles - Rotary SwitchMPD-DC-25KVA-480.240.208-120$10,519.56N/AN/AN/A 


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