ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T51B0203 - 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

9T51B0203

UPC: 783173012499


Documents & Media
Specification Sheet

Contact for Pricing

Overview

The ABB 9T51B0203 is a compact, single-phase, dry-type distribution transformer engineered for precise voltage adjustment in industrial and commercial settings. Manufactured in the US, this transformer offers a versatile solution for compensating for voltage drops or fine-tuning supply voltages. It operates efficiently at a 50/60 Hz frequency and boasts a 0.5 kVA rating. The primary input voltage is 480 Volts, with a dual secondary output providing 120/240 Volts. This unit is shipped as an insulating/isolating transformer and can be field-connected as an autotransformer, complying with NEC Article 210-9, Exception 1, for specific voltage boosting or bucking applications. Equipped with (-2: 5.0%) taps, it allows for a 5.0% voltage reduction. The transformer features frame size 10225 and weighs 20 lbs. ABB's dry-type construction ensures enhanced safety and reduced maintenance requirements, making it suitable for diverse operational environments. Refer to wiring diagram no. 2 for installation guidance. This transformer is ideal for applications demanding precise voltage control within a narrow range, such as motor control circuits or lighting systems where voltage fluctuations can negatively impact performance. The 9T51B0203 model exemplifies ABB's commitment to delivering reliable power distribution solutions.
  • 0.5 kVA, single-phase, dry-type distribution transformer
  • 480V input, 120/240V dual output
  • 50/60 Hz frequency operation
  • (-2: 5.0%) taps for 5.0% voltage reduction
  • NEC Article 210-9, Exception 1 compliant when field-connected as autotransformer
  • Output Voltage: 120/240 Volts
  • Frequency: 50/60 Hz
  • Taps: (-2: 5.0%) for voltage reduction
  • Frame Size: 10225
  • Weight: 20 lbs

Specifications

Connection Type
Field-connected as autotransformer
Connection Type
Dual Voltage Primary and Secondary
Enclosure
NEMA 3R
Frequency
50/60 Hz
Frequency Rating
60 HZ
Height
6.38 in
Input Voltage
240x480
Insulation
CLASSA
Material
Dry-type (insulating/isolating)
Material
Dry type
Output Voltage
24/48
Phase
1
Poles
Single-Phase
Poles
Single Phase
Series
Buck-Boost
Series
9T51B
Size
Frame size 10225
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
480 VAC / 120/240 VAC
Wattage
0.075 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 is the kVA rating of the ABB 9T51B0203 transformer?

The ABB 9T51B0203 transformer has a kVA rating of 0.5.

What are the input and output voltages for this transformer?

The input voltage is 480 Volts, and the output voltage is 120/240 Volts.

What is the frequency range for the ABB 9T51B0203 transformer?

This transformer operates at a frequency of 50/60 Hz.

Does this transformer comply with NEC Article 210-9, Exception 1?

Yes, the ABB 9T51B0203 complies with NEC Article 210-9, Exception 1, when field-connected as an autotransformer.

What is the purpose of the taps on this transformer?

The transformer is equipped with (-2: 5.0%) taps, allowing for a 5.0% voltage reduction.

What is the weight of the ABB 9T51B0203 transformer?

The ABB 9T51B0203 transformer weighs 20 lbs.

What is the frame size of this ABB transformer?

The frame size for the ABB 9T51B0203 transformer is 10225.

How to Install the ABB 9T51B0203 Buck-Boost Transformer

Step-by-step guide for installing the ABB 9T51B0203 Buck-Boost Transformer.

Estimated time: 30m

Tools needed:

Screwdriver, Wire strippers, Wire connectors, Voltage tester

Supplies needed:

Mounting screws, Appropriate gauge wiring

  1. Mount the Transformer

    Securely mount the ABB 9T51B0203 transformer to a stable surface or DIN rail using appropriate mounting screws. Ensure adequate ventilation around the unit.

  2. Connect Primary Wiring

    Refer to wiring diagram no. 2. Connect the 480V primary input voltage to the designated primary terminals of the transformer using appropriate gauge wiring and wire connectors.

  3. Connect Secondary Wiring

    Connect the desired 120V or 240V output voltage from the dual secondary terminals to your load circuit using appropriate gauge wiring and wire connectors.

  4. Configure Taps (if needed)

    If voltage adjustment is required, configure the (-2: 5.0%) taps according to the wiring diagram to achieve the desired voltage buck or boost.

  5. Verify Connections and Voltage

    Double-check all wiring connections for security and correctness. Use a voltage tester to verify that the correct input and output voltages are present before energizing the circuit.

Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

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 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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