ABB - Electrification Signature Partner Distributor
ABB - Electrification 9T33A2670 - ABB's 9T33 Single phase low-voltage dry type transformers are for balanced 3-wire 120/240 V secondary voltage systems having both NRCan (C802.2) and DOE (10 CFR 431, Subpart K) energy efficiency certification and compliance. UL and cUL listed to UL 1561 and CSA C22.2 No.47. Qualified to the seismic requirements of IEEE-693-2005 and the IBC-2021 and CBC 2022. The 9T33 transformers are also UL Energy Verified.
ABB - Electrification

9T33A2670

UPC: 783173365496


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Specification Sheet

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Overview

ABB's 9T33 Series single-phase, low-voltage dry-type transformers (SKU: 9T33A2670) deliver precise power conversion for balanced 3-wire 120/240 V secondary systems. These transformers are engineered with silicon steel cores for optimal efficiency and reliability, meeting stringent energy efficiency standards including NRCan (C802.2) and DOE (10 CFR 431, Subpart K). All models are UL Energy Verified and comply with UL 1561 and CSA C22.2 No.47 standards, ensuring safety and performance in commercial and industrial applications. Key specifications include multiple input voltage options (277V, 120x240V, 480V, 600V) and kVA ratings ranging from 0.25 kVA to 10 kVA. For example, the 1 kVA model (9T51B0190) weighs 30 lbs with a 277V input and features -2: 5.1% taps, while the 10 kVA model (9T21B1048G02) supports 277V input with a weight of 198 lbs and -2: 5.1% taps. The 5 kVA model (9T21B1013G02) operates at 480V input, weighs 103 lbs, and includes +2, -2: 2.5% taps for voltage adjustment flexibility. Designed for resilience, the 9T33 series meets seismic requirements per IEEE-693-2005, IBC-2021, and CBC 2022, making it suitable for earthquake-prone regions. All models operate at 60 Hz and are manufactured in the US, ensuring compliance with local and international standards. The transformers are ideal for applications requiring dependable, energy-efficient power transformation in commercial buildings, industrial facilities, and critical infrastructure.
  • Energy-efficient design compliant with DOE (10 CFR 431) and NRCan (C802.2) standards
  • UL and cUL listed to UL 1561 and CSA C22.2 No.47 for safety and reliability
  • Seismic-qualified per IEEE-693-2005, IBC-2021, and CBC 2022 for earthquake-prone regions
  • Available in multiple input voltages (277V, 120x240V, 480V, 600V) and kVA ratings (0.25 to 10 kVA)
  • Manufactured in the US with UL Energy Verified certification

Specifications

Connection Type
Balanced 3-wire system
Connection Type
3-wire
Efficiency
DOE/NRC
Frequency
60 Hz
Frequency Rating
60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
60 Hz
Insulation
IS-19C
KVA Rating
15 KVA
Material
Dry type transformer
Material
Silicon Steel
Phase
1
Poles
3-wire
Primary Voltage
240x480 V
Secondary Voltage
120/240 VAC
Series
9T33
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
120/240 V
Package Dimensions (L x W x H)
18.4 IN x 23.8 IN x 32.1 IN
Package Dimensions (L x W x H)
46.736 cm x 60.452 cm x 81.534 cm
Package Weight (Imperial)
320.000 L
Package Weight (Metric)
145.152 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 input voltages are supported by the 9T33 series?

The 9T33 series supports input voltages of 277V, 120x240V, 480V, and 600V, depending on the model.

What are the available kVA ratings for the 9T33 transformers?

The 9T33 series includes kVA ratings of 0.25, 1, 3, 5, and 10 kVA, with specific models tailored to each rating.

Are the 9T33 transformers compliant with seismic standards?

Yes, the 9T33 series is qualified to seismic requirements per IEEE-693-2005, IBC-2021, and CBC 2022.

What is the operating frequency of the 9T33 transformers?

All 9T33 transformers operate at a frequency of 60 Hz.

What certifications do the 9T33 transformers hold?

The 9T33 series is UL and cUL listed to UL 1561 and CSA C22.2 No.47, and UL Energy Verified.

Where are the 9T33 transformers manufactured?

The 9T33 transformers are manufactured in the United States.

What is the weight of the 10 kVA 9T33 transformer?

The 10 kVA 9T33 transformer weighs 198 lbs, regardless of input voltage (277V or 480V).

What is the output voltage of the 9T33 transformers?

All 9T33 transformers provide a secondary output voltage of 120/240V.

Do the 9T33 transformers have adjustable voltage taps?

Yes, some models include voltage taps such as -2: 5.1%, +2, -2: 2.6%, or +2, -2: 2.5%, depending on the kVA rating.

Are the 9T33 transformers suitable for outdoor use?

The 9T33 series is designed for indoor use as dry-type transformers. Outdoor applications require additional enclosures.

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