ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T51B0137 - 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

9T51B0137

UPC: 783173011577


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Overview

Optimize your electrical systems with ABB's Buck-Boost transformers, SKU 9T51B0137. These compact, single-phase, dry-type distribution transformers are engineered for exceptional performance and flexibility. Shipped as insulating/isolating transformers, they feature a dual-voltage primary and a dual-voltage secondary, enabling a wide array of voltage configurations. Their primary application is to precisely adjust supply voltage, either lowering (bucking) or raising (boosting) it by a typical range of 5% to 27%. This capability is crucial for fine-tuning power to sensitive equipment or meeting specific voltage requirements without the need for complex rewiring. When configured in the field as an autotransformer, these ABB buck-boost units reliably comply with NEC Article 210-9, Exception 1, ensuring adherence to electrical code standards. Manufactured in the USA, these transformers offer a robust and efficient solution for various industrial and commercial power distribution needs, providing reliable voltage correction in a compact footprint. Specific models within this series, such as those with frame size XV173, offer kVA ratings of 37.5 or 50, with primary voltages of 240 x 480 Volts and secondary voltages of 120 / 240 Volts. For example, model 9T33C2672G15 (XV173 frame) is rated at 37.5 kVA, with primary 240 x 480V and secondary 120 / 240V, featuring taps (+2,-4; 2.7%). Model 9T33C2673G13 (XV173 frame) is rated at 50 kVA, with primary 240 x 480V and secondary 120 / 240V, featuring taps (+2,-4; 2.5%). These units also feature primary and secondary fusing for protection. They are UL and CSA certified with an insulation system of 105°C and a temperature rise of 55°C. These transformers are designed for reliable operation and safety.
  • Single-phase, dry-type distribution transformer
  • Dual voltage primary (240 x 480V) and secondary (120 / 240V)
  • Enables voltage bucking or boosting by 5-27%
  • UL and CSA certified, Insulation system 105°C, Temp rise 55°C
  • Includes primary and secondary fusing for protection

Specifications

Enclosure
NEMA 3R
Frequency Rating
60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
60 Hz
Height
8.38 in
Input Voltage
240 VAC
Insulation
IS-12
Output Voltage
120
Phase
1
Standard
Yes
Temperature Rating
40 °C
Temperature Rating, Maximum
104 F
Temperature Rating, Maximum
40 C
Temperature Rating, Minimum
104 F
Temperature Rating, Minimum
40 C
Voltage Rating
240x480 V / 120x240 V
Wattage
0.75 KVA
Width
6.88 in
Package Dimensions (L x W x H)
10.75 IN x 9.75 IN x 8.5 IN
Package Dimensions (L x W x H)
27.305 cm x 24.765 cm x 21.59 cm
Package Weight (Imperial)
18.270 L
Package Weight (Metric)
8.287 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 used to precisely adjust supply voltage, either lowering (bucking) or raising (boosting) it by a typical range of 5% to 27%.

Are these transformers compliant with electrical codes?

When field-connected as an autotransformer, these ABB buck-boost units reliably comply with NEC Article 210-9, Exception 1.

What certifications do these ABB buck-boost transformers hold?

These transformers are UL and CSA certified.

What voltage configurations can be achieved with this transformer?

These transformers feature a dual voltage primary and a dual voltage secondary, enabling a wide range of voltage combinations.

What is the temperature rise rating for these transformers?

The temperature rise for these transformers is rated at 55°C.

What is the insulation system class for this transformer?

The insulation system for these transformers is rated at 105.

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