ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T51B0890 - 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

9T51B0890

UPC: 783173149416

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Specification Sheet

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Overview

ABB's Buck-Boost Transformer, SKU 9T51B0890, is a robust, single-phase, dry-type distribution transformer engineered for precise voltage adjustment in industrial and commercial settings. This insulating/isolating transformer features dual-voltage primary windings (240 x 480 Volts) and dual-voltage secondary windings (120 / 240 Volts), enabling a wide range of voltage combinations. Its primary application is to buck (lower) or boost (raise) the supply voltage by a small, controlled amount, typically between 5% and 27%. When field-connected as an autotransformer, it complies with NEC Article 210-9, Exception 1, ensuring code-compliant operation for critical circuits. Key specifications include a 50 kVA rating, a 55°C temperature rise, and a 105°C insulation system, ensuring reliable performance and longevity. The transformer is UL recognized and CSA certified, meeting stringent safety and performance standards. Its dry-type construction eliminates the need for oil, making it suitable for environments where fire safety is paramount. The unit includes primary fuse holders (2 fuses) and secondary fuse clips (1 fuse) for integrated protection. The product net weight is 500 lbs. Taps are available for fine-tuning voltage adjustments, with specific models offering (+2,-4; 2.7%) or (+2,-4; 2.5%) tap configurations for precise voltage correction. Typical applications include correcting under- or over-voltage conditions in industrial machinery, stabilizing power for sensitive electronic equipment, and serving as auxiliary transformers for HVAC systems. The dual-voltage flexibility of the 9T51B0890 reduces inventory needs and simplifies installation by accommodating various voltage requirements without requiring multiple transformer units. Its field-configurable autotransformer connections allow for quick adaptation to changing voltage demands. Backed by ABB's Electrification division, this transformer delivers reliable voltage control for critical applications in manufacturing plants, commercial buildings, and data centers, offering a cost-effective solution for voltage regulation challenges.
  • 50 kVA, single-phase, dry-type distribution transformer
  • Dual voltage primary (240 x 480 Volts) and secondary (120 / 240 Volts)
  • Adjusts supply voltage by 5-27% (buck or boost)
  • UL recognized and CSA certified for safety and reliability
  • Includes primary fuse holders and secondary fuse clips for protection

Specifications

Connection Type
Field-configurable autotransformer
Connection Type
Field-connected as autotransformer
Connection Type
Field-configurable (autotransformer)
Enclosure
NEMA 3R
Frequency Rating
60 HZ
Height
9.62 in
Input Voltage
600 VAC
Insulation
IS-12
Material
Dry-type
Material
Dry-type (insulating/isolating)
Material
Dry-type insulation
Output Voltage
120/240
Phase
1
Poles
Single-Phase
Series
Buck-Boost
Series
Buck-Boost Transformer
Size
Compact
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
Voltage Rating
120/240 V
Voltage Rating
Dual-voltage (field-configurable)
Wattage
1 KVA
Width
7.88 in
Package Dimensions (L x W x H)
5.5 IN x 7.88 IN x 9.62 IN
Package Dimensions (L x W x H)
13.97 cm x 20.0152 cm x 24.4348 cm
Package Weight (Imperial)
30.000 L
Package Weight (Metric)
13.608 kg
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.

9T51B0810

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.
Buck Boost Transformers, 0.75 KVA, Maximum Secondary Amperage: 62.5 at 12V, 31.2 at 24V, 120 x 240 Volt Primary, 12/24 Volt Secondary

HS19F750B

Buck Boost Transformers, 0.75 KVA, Maximum Secondary Amperage: 62.5 at 12V, 31.2 at 24V, 120 x 240 Volt Primary, 12/24 Volt Secondary
600V Class Commercial Encapsulated Single Phase Buck-Boost/Isolation Transformer, 120x240 PV, 16x32 SV, 2000 VA

Q002ESCF

600V Class Commercial Encapsulated Single Phase Buck-Boost/Isolation Transformer, 120x240 PV, 16x32 SV, 2000 VA
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.

9T51B0812

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'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.

9T51B0893

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'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.

9T51B0892

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'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.

9T51B0212

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'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.

9T51B0430

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.

Frequently Asked Questions

Is this transformer UL and CSA certified?

Yes, the 9T51B0890 is UL and CSA certified, ensuring compliance with safety standards for industrial and commercial use.

What voltage ranges can this transformer handle?

The primary and secondary windings are dual-voltage (120/240V), allowing flexible configurations for voltage adjustments between 5% and 27%.

What is the insulation system rating?

The transformer features a 105°C insulation system, ensuring durability and long-term performance.

What is the temperature rise rating?

The transformer has a temperature rise rating of 55°C, supporting reliable operation under load.

Can this transformer be used as an autotransformer?

Yes, when field-connected as an autotransformer, it complies with NEC Article 210-9, Exception 1 for voltage correction.

What are the typical applications for this transformer?

Common uses include correcting under/over-voltage in industrial machinery, stabilizing LED lighting, protecting electronics, and serving as an HVAC auxiliary transformer.

Frequently Asked Questions about ABB - Electrification

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Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

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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 products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

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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.

What are the main product lines offered by ABB - Electrification?

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.

What are the key features of ABB - Electrification products?

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What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.