Advertisement
Quick Links
Larson Electronics LLC
9419 E US HWY 175, Kemp, TX 75143
Phone: 800.369.6671
MT-BBT-480Y-380Y.220-3P-781A
3-Phase Wye Buck/Boost Step-Down Transformer - 480V Wye Primary - 380Y/220 Wye
Secondary - 781 Amps
Product ID: 282191
Larson Electronics LLC manufactures a wide variety of products, including custom built to spec designs.
The pictures displayed for this unit are a general representation of form factor for the product line and
may not accurately represent this exact configuration in every detail due to custom builds and changes
between similar products in our standard catalog. The specifics for this configuration are listed in the
specification table and supporting documentation (CAD files, Dimensional Drawing, Name Plate Diagram,
Wiring Diagram, etc.). This means that specific details (receptacles, plugs, wires, connections, mounting
brackets, external finishes, etc.) may not be accurately represented in images vs specifications. Please
review specifications and do not order based solely on images.
MT-BBT-480Y-380Y.220-3P-781A Buck and Boost Step-Down Transformer
Transformer Type: Buck/Boost Step-Down Autotransformer
Phase: Three Phase
Frequency: 50/60 Hz
Input Voltage: 480 V Wye
Primary Amps: 625 A @ 480 V Wye
Primary Configuration: Delta
kVA: 519
Output Voltage: 380Y/220 V Wye
Secondary Amps: 781 A @ 380Y/220 V Wye
Voltage Difference: 79%
Winding Material: Copper
Knockouts: Side and Rear
Primary Termination: Front Access Copper Tabs or Lead Wires
Secondary Termination: Front Access Copper Tabs or Lead Wires
Cooling: Air / Dry Type
Insulation: 220°C
Temperature Rise: 150°C
Sound Level: 36 dB
Enclosure Rating: NEMA 3R
Encapsulation: Silica Sand & Resin Compounds
Enclosure Material: NEMA Type 3R Heavy Duty Ventilated
Finish: ANSI 61 Grey
Mounting: Floor Mount
Dimensions: 26.88"-L x 95.70"-W x 35.47"-H
Weight: 1,290 lb
Email: sales@LarsonElectronics.com
Ratings
NRTL Listed for United States
CSA Certified for Canada
NEMA 3R Indoor/Outdoor Enclosure
Meets or Exceeds NEMA ST-20 Standards
Buck and Boost Step-Down Transformer
Special Orders - Requirements
Contact us for special requirements
Toll Free: 1-800-369-6671
Intl: 1-214-616-6180
E-mail:
sales@larsonelectronics.com
1
www.LarsonElectronics.com
Fax: 903.498.3364
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for LARSON MT-BBT-480Y-380Y.220-3P-781A
Summary of Contents for LARSON MT-BBT-480Y-380Y.220-3P-781A
- Page 1 Secondary - 781 Amps Product ID: 282191 Larson Electronics LLC manufactures a wide variety of products, including custom built to spec designs. The pictures displayed for this unit are a general representation of form factor for the product line and may not accurately represent this exact configuration in every detail due to custom builds and changes between similar products in our standard catalog.
- Page 2 Phone: 800.369.6671 Fax: 903.498.3364 The MT-BBT-480Y-380Y.220-3P-781A Three Phase Step-Down Buck and Boost Transformer from Larson Electronics is powerful, reliable, and designed with the environment in mind. Suitable for both indoor and outdoor applications, the MT-BBT-480Y-380Y.220-3P-781A provides increased reliability, higher efficiency, protection against critical equipment failures, and an extra level of protection by isolating the power source from the connected device.
- Page 3 For single phase transformers, click on the following link: Single Phase Delta Buck/Boost Transformers Larson Electronics is a manufacturer and as such can build stationary and portable transformer systems to your specifications. Although we carry several models of power distribution transformer systems, we can deliver custom ordered units almost as quickly as our prebuilt units.
- Page 4 THREE-PHASE BUCK & BOOST TRANSFORMERS INSTRUCTION MANUAL This manual applies to all three-phase buck & boost transformers sold by Larson Electronics. Please refer to the connection diagram on pages 4-6 for properly connecting the transformer. Warning: Do not attempt installation until you are familiar with all warnings, precautions, and procedures outlined within this instruction sheet.
- Page 5 When windings are connected in parallel (in the case of dual voltage primaries), the primary taps for all coils must be connected to the identical percentage tap positions to avoid the shorting of turns. For tap positions, refer to the transformer nameplate. Larson Electronics, LLC Phone: (800) 369-6671 Fax: (903) 498-3364 www.larsonelectronics.com...
- Page 6 Warning: Do not perform internal maintenance without first de-energizing the transformer! The transformer must be isolated and the terminals grounded. Check all ground connections to ensure a low impedance connection. Larson Electronics, LLC Phone: (800) 369-6671 Fax: (903) 498-3364 www.larsonelectronics.com...
- Page 8 DIAGRAM L BUCK & BOOST TRANSFORMERS TYPE A TYPE B Larson Electronics, LLC Phone: (800) 369-6671 Fax: (903) 498-3364 www.larsonelectronics.com 5 of 7...
-
Page 9: Wiring Diagram
8. Connect Low Voltage PHASE C to X1, X3, H4 on transformer 3 9. Connect H3 and H2 for each transformer 10. Connect NEUTRAL to H1 11. Bridge H1 connections between ALL transformers Larson Electronics, LLC Phone: (800) 369-6671 Fax: (903) 498-3364 www.larsonelectronics.com... - Page 10 DIAGRAM L BUCK & BOOST TRANSFORMERS Larson Electronics, LLC Phone: (800) 369-6671 Fax: (903) 498-3364 www.larsonelectronics.com 7 of 7...
-
Page 15: Frequently Asked Questions (Faq)
Frequently Asked Questions (FAQ)
Need help?
Do you have a question about the MT-BBT-480Y-380Y.220-3P-781A and is the answer not in the manual?
Questions and answers