ABB - Electrification 9T51B0111 - 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

9T51B0111

UPC: 783173008607

Contact for Pricing

Overview

Optimize voltage levels with the ABB 9T51B0111 Single Phase Dry Type Buck-Boost Transformer (SKU: 9T51B0111). Manufactured in the USA by ABB Electrification, this compact distribution transformer is designed for precise voltage adjustment. It functions as both an insulating and isolating transformer, featuring a robust dry-type construction for reliable operation. The unit offers a dual voltage primary (240 x 480 Volts) and a dual voltage secondary (120 / 240 Volts), enabling flexible connection configurations. Its primary application is to buck (lower) or boost (raise) the supply voltage by a typical range of 5% to 27%, ensuring stable and specific voltage inputs for sensitive equipment. This model is rated at 50 kVA, with a frame size of XV173. It includes taps for voltage adjustment, specifically (+2, -4; 2.5%) for the 9T33C2673G13 sub-model or (+2, -4; 2.7%) for the 9T33C2673G15 sub-model. The transformer is UL and CSA listed, with an insulation system of 105°C and a temperature rise of 55°C. It is equipped with primary fuse holders (2 fuses) and a secondary fuse clip (1 fuse) for protection. When field-connected as an autotransformer, these buck-boost transformers comply with NEC Article 210-9, Exception 1. The product net weight is approximately 500 lbs. This transformer is ideal for applications requiring fine-tuned voltage regulation, ensuring optimal performance and longevity of connected equipment.
  • 50 kVA, 50/60 Hz, Single Phase Dry Type Transformer
  • Dual Voltage Primary: 240 x 480 Volts
  • Dual Voltage Secondary: 120 / 240 Volts
  • Taps for voltage adjustment: (+2, -4; 2.5%) or (+2, -4; 2.7%)
  • UL and CSA Listed, Insulation System 105°C, Temp Rise 55°C

Specifications

Enclosure
NEMA 3R
Frequency Rating
60 HZ
Height
11.12 in
Input Voltage
120x240
Insulation
IS-12
Output Voltage
12/24
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 voltage rating of this ABB transformer?

The primary voltage rating for this ABB buck-boost transformer is 240 x 480 Volts.

What is the secondary voltage output?

The secondary voltage output of this transformer is 120 / 240 Volts.

What is the kVA rating of the 9T51B0111 transformer?

The ABB 9T51B0111 transformer has a kVA rating of 50.

Does this transformer comply with NEC Article 210-9?

Yes, when field-connected as an autotransformer, these buck-boost transformers comply with NEC Article 210-9, Exception 1.

What are the available tap settings for voltage adjustment?

Tap settings include (+2, -4; 2.5%) or (+2, -4; 2.7%), depending on the specific sub-model configuration.

What is the insulation system and temperature rise rating?

This transformer features an insulation system of 105°C and a temperature rise of 55°C.

Is this transformer UL and CSA listed?

Yes, the ABB 9T51B0111 transformer is UL and CSA listed.

What is the approximate net weight of the transformer?

The approximate net weight of this transformer is 500 lbs.

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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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