ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T51B0811 - ABB's Buck-boost transformers are small, single phase, dry type distribution transformers designed and shipped as insulating/isolating transformers. They have a dual voltage primary and a dual voltage secondary. These transformers can be connected for a wide range of voltage combinations. The most common use is to buck (lower) or boost (raise) the supply voltage a small amount, usually 5 to 27%. Buck boost transformers comply with NEC Article 210-9, Exception 1, when field connected as an autotransformer.
ABB - Electrification

9T51B0811

UPC: 783173149362


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Specification Sheet

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Overview

The ABB Buck-boost Transformer, SKU 9T51B0811, is a compact, single-phase, dry-type distribution transformer engineered for precise voltage regulation in industrial and commercial settings. Designed as an insulating/isolating transformer, it features dual-voltage primary and secondary windings, allowing for flexible configuration across a broad spectrum of voltage combinations. This transformer is ideal for applications requiring minor voltage adjustments, typically between 5% and 27%, to optimize equipment performance and safeguard sensitive loads. When field-connected as an autotransformer, this ABB unit complies with NEC Article 210-9, Exception 1, ensuring safe and compliant operation within distribution systems. Its dry-type construction eliminates the need for liquid insulation, enhancing safety and reducing maintenance overhead. The compact design facilitates installation in space-constrained areas, while its robust build guarantees long-term reliability in demanding operational environments. Common applications include adjusting supply voltage to match specific equipment requirements, compensating for voltage drops in extended cable runs, supporting lighting, HVAC, and motor control systems, and improving overall power quality in industrial facilities. Manufactured in the USA, this transformer is built to UL and CSA standards, featuring a 105°C insulation system and a 55°C temperature rise. It includes primary and secondary fusing for enhanced protection. The UNSPSC code for this product is 39121025.
  • Single-phase, dry-type distribution transformer
  • Dual voltage primary and secondary windings for flexible configurations
  • Adjusts voltage by 5-27% for precise equipment operation
  • Complies with NEC Article 210-9, Exception 1 when field-connected as autotransformer
  • UL and CSA certified with 105°C insulation system and 55°C temperature rise

Specifications

Enclosure
NEMA 3R
Frequency Rating
60 HZ
Height
11.12 in
Input Voltage
240x480
Insulation
IS-12
Output Voltage
120/240
Phase
1
Special Features
ABB's Buck-boost transformers are small, single phase, dry type distribution transformers designed and shipped as insulating/isolating transformers. They have a dual voltage primary and a dual voltage secondary. These transformers can be connected for a wide range of voltage combinations. The most common use is to buck (lower) or boost (raise) the supply voltage a small amount, usually 5 to 27%. Buck boost transformers comply with NEC Article 210-9, Exception 1, when field connected as an autotransformer.
Standard
Yes
Temperature Rating
40 °C
Wattage
1.5 KVA
Width
9.38 in
Package Dimensions (L x W x H)
6.72 IN x 9.38 IN x 11.12 IN
Package Dimensions (L x W x H)
17.0688 cm x 23.8252 cm x 28.2448 cm
Package Weight (Imperial)
40.000 L
Package Weight (Metric)
18.144 kg
A - 15.0 kV bushing

015J0400AN

A - 15.0 kV bushing
O Plus C - 34.5 kV bushing

034Z3000AW

O Plus C - 34.5 kV bushing

Frequently Asked Questions

What is the primary function of an ABB buck-boost transformer?

ABB buck-boost transformers are designed to lower (buck) or raise (boost) the supply voltage by a small amount, typically 5% to 27%, to match equipment requirements or compensate for voltage drops.

Does this transformer comply with NEC Article 210-9?

Yes, when field-connected as an autotransformer, the ABB Buck-boost transformer complies with NEC Article 210-9, Exception 1, ensuring safe and compliant operation.

What are the benefits of a dry-type construction?

The dry-type construction eliminates the need for liquid insulation, enhancing safety and reducing maintenance requirements compared to oil-filled transformers.

What is the typical voltage adjustment range for this transformer?

The most common use is to buck or boost the supply voltage a small amount, usually between 5% and 27%.

What are the voltage capabilities of this transformer?

This transformer features a dual voltage primary and a dual voltage secondary, allowing for connection to a wide range of voltage combinations to suit various applications.

Frequently Asked Questions about ABB - Electrification

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What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

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ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

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ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

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ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

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