ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T51B0102 - 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

9T51B0102

UPC: 783173008522


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Specification Sheet

Contact for Pricing

Overview

ABB’s 9T51B0102 Single Phase Buck-Boost Transformer (SKU: 9T51B0102) is a compact, dry-type distribution transformer designed for precise voltage adjustment in industrial and commercial electrical systems. This insulating/isolating transformer features a dual-voltage primary (e.g., 240/480V) and dual-voltage secondary (e.g., 120/240V), enabling flexible configuration for a wide range of voltage combinations. The primary application is to buck (lower) or boost (raise) supply voltage by 5% to 27%, ensuring optimal equipment performance and longevity in environments prone to voltage fluctuations. When field-connected as an autotransformer, the 9T51B0102 complies with NEC Article 210-9, Exception 1, simplifying installation while maintaining code adherence. The transformer is UL-listed and CSA-certified, with a 105°C insulation system and 55°C temperature rise, making it suitable for demanding applications. Primary and secondary fuse holders (2 primary, 1 secondary) are included for enhanced safety and protection. Manufactured in the USA, this transformer is built to meet the rigorous demands of industrial electrification, offering reliability and adaptability for voltage stabilization in control panels, lighting systems, and HVAC equipment. Key applications include correcting under-voltage or over-voltage conditions, stabilizing motor starting voltages, and optimizing transformer efficiency in single-phase systems. The 9T51B0102 is ideal for retrofitting existing systems where voltage correction is required without replacing major components. Its compact design and field-configurable voltage taps provide versatility for engineers and electricians seeking a cost-effective solution for voltage regulation. The transformer’s dual-voltage primary and secondary allow for multiple wiring configurations, reducing inventory needs and simplifying procurement.
  • Dual-voltage primary and secondary for flexible configuration
  • 5-27% voltage adjustment (buck or boost) for precise regulation
  • UL-listed and CSA-certified with 105°C insulation system
  • 55°C temperature rise and built-in fuse holders (2 primary, 1 secondary)
  • Field-configurable for autotransformer operation (NEC Article 210-9, Exception 1)

Specifications

Color
Blue
Connection Type
Field-configurable
Connection Type
Field Connectable (Autotransformer)
Enclosure
NEMA 3R
Frequency
60 Hz
Frequency Rating
60 HZ
Height
6.38 in
Input Voltage
120x240
Insulation
CLASSA
Material
Poly
Material
Dry type
Output Voltage
12/24
Phase
1
Poles
Single Phase
Series
9T51B
Series
Buck-Boost Transformers
Series
Buck-Boost
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
Wattage
0.05 KVA
Width
5.12 IN
Package Dimensions (L x W x H)
3.25 IN x 5.12 IN x 6.38 IN
Package Dimensions (L x W x H)
8.255 cm x 13.0048 cm x 16.2052 cm
Package Weight (Imperial)
6.000 L
Package Weight (Metric)
2.722 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 material is the coil made of?

The coil material for this transformer is copper (CU).

Is this transformer UL listed?

Yes, this transformer is UL listed.

Is this transformer cUL listed?

Yes, this transformer is cUL listed.

What is the KVA rating of the 9T51B0102 transformer?

The transformer has a KVA rating of 10 KVA.

What is the enclosure type of this transformer?

The enclosure type is NEMA 3R.

What is the temperature rise rating for this transformer?

The temperature rise rating for this transformer is 150 degrees Celsius.

What is the frequency rating for this transformer?

The frequency rating for this transformer is 60 Hz.

What is the insulation system class?

The insulation system class for this transformer is Class A.

What type of transformer is the 9T51B0102?

The ABB 9T51B0102 is a small, single-phase, dry-type distribution transformer designed as an insulating/isolating transformer.

What is the common application for this transformer?

The most common use is to buck (lower) or boost (raise) the supply voltage by a small amount, typically 5-10%.

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