Todays deals on Transformer Type?

145000-34500Y/19918 Volts Westinghouse Three Phase Type SL Transformer $150,000.00

SOLA 63-28-315-8 MINI/MICRO COMPUTER REGULATOR TYPE CVS TRANSFORMER NEW $8,500.00

300T3H SQUARE D Dry Type N1 300KVA 480-120/208Y Transformer – NEW IN BOX $3,950.00

ACUTRANS Dry Type Voltage Regulator Step Transformer $3,600.00

Eaton Cutler Hammer 150KVA/3phase Dry type transformer. New never been used! $3,000.00

MGM DRY TYPE POWER TRANSFORMER 150 KVA (2010) $2,500.00

SORGEL DRY-TYPE 3 PHASE INSULATED 225KVA TRANSFORMER (1729) $2,499.00

HAMMOND 150KVA TRANSFORMER, 480 HV, 240 LV, DRY TYPE, #MK150KD $2,499.00

75 KVA Dry Type Distribution Transformer 3PH 240 – 208Y $1,692.00

75 KVA Dry Type Distribution Transformer 3PH 240 Delta – 480Y/277V 423-7233-000 $1,692.00

75 KVA Dry Type Distribution Transformer 3PH 480 – 208Y $1,692.00

Del Electronics Type AD 4378 Filament Transformer $2,000.00

3 Phase, 75 KVA, General Electric NEMA Class AA Dry Type Transformer $1,900.00

Transformer GE 225 KVA 480/240 Dry Type $1,800.00

Square D Power Zone Dry-Type Transformer 167KVA 480V $1,600.00

45 KVA Dry Type Distribution Transformer 3PH 240 – 460Y $1,296.00

45 KVA Dry Type Distribution Transformer 3PH 480 – 208Y $1,288.00

45 KVA Dry Type Distribution Transformer 3PH 240 – 208Y $1,287.00

GE 150 KVA DRY TYPE TRANSFORMER 3 PHASE $1,500.00

30 KVA Dry Type Distribution Transformer 3PH 240 – 460Y $1,091.00

30 KVA Dry Type Distribution Transformer 3PH 240 – 208Y $1,066.00

30 KVA Dry Type Distribution Transformer 3PH 480 – 208Y $1,065.00

15 KVA Dry Type Distribution Transformer 3PH 600V – 240V Jefferson 423-716A-000 $969.00

15 KVA Dry Type Distribution Transformer 3PH 600V – 208Y Jefferson 423-7169-000 $969.00

BEAVER 30 kVA TRANSFORMER BC30JS/B 600/240Y 3 Phase TYPE-2 Enclosure $1,150.00

General Electric Dry Type Transformer Type QL 9T23Q1126 30 KVA 3 PH 480/575Y-332 $995.00

15 KVA Dry Type Distribution Transformer 3PH 480V 240V Jefferson 423-7167-000 $909.00

15 KVA Dry Type Distribution Transformer 3PH 240 – 208Y $905.00

15 KVA Dry Type Distribution Transformer 240 Delta 208Y $903.00

15 KVA Dry Type Distribution Transformer 480 Delta 208Y $841.00

15 KVA Dry Type Distribution Transformer 600 Delta 208Y $841.00

HPS 1 Phase Iron Core Dry Type Reactor 690V transformer $735.00

SIEMENS DRY TYPE TRANSFORMER 45KVA CAT NO. 3F1Y045 (1965) $999.00

NUNOME ELECTRIC CO. DRY-TYPE 6.93KVA TRANSFORMER (1119) $999.00

75 KVA GENERAL ELECTRIC TRANSFORMER # 9T23Q3464G13 , TYPE QL 480 VOLT PRIMARY $965.00

WARNER POWER 50 KVA DRY TYPE TRANSFORMER 3 PH. 60 Hz. $925.00

GE General Electric 45 KVA Transformer 480 Primary 208/120 Secondary Dry Type $739.00

SCHAEVITZ Engineering Linear Variable Differential Transformer Type 1000 MP $895.00

MICRON INDUSTRIES CORP. 45 KVA DRY TYPE DISTRIBUTION TRANSFORMER (1944) $890.00

MGM 30 kVA 240 – 208Y/120V 60hz Three Phase DRY TYPE TRANSFORMER HT30C3B2SH $800.00

SOLA ELECTRIC 23-26-210 TRANSFORMER TYPE-CVS IN 190-260X380-520 OUT 120×240 $725.00

Challenger Dry Type Distribution Transformer 63KVA SEC 230Y133 Cat No. 632-LQ3T $750.00

SQUARE D 75 KVA DRY TYPE TRANSFORMER $750.00

REX 3 Phase Dry Type 15 KVA Transformer FREE SHIPPING $748.00

REX 3 Phase Dry Type 15 KVA Transformer FREE SHIPPING $748.00

HAMMOND Dry Type Transformer 1 Phase 7.5kVA 277V-240V $645.00

astra type tcb cat# 234 current transformer 400:5 amp .06kv b.i.l. 10kv new 3 $660.00

Siemens Dry Type Transformer 45 KVA #3F3Y045TP1 NEW $476.00

HITRAN Transformer D3000834H5 TYPE dit CLASS AA $649.99

SQUARE D, NEMA SIZE 6 MOTOR STARTER W/ TRANSFORMER, CLASS 8502, TYPE-SHO-1 $649.00

Eaton Dry Type Distribution Transformer S20N11S07N *NEW $599.95

Used GE Dry Type QL Power Transformer 769G CLASS AA 3Ph 60HZ $590.00

ACME T-2-53515-3S GENERAL PURPOSE TRANSFORMER STYLE SR TYPE 3R OUTDOOR $464.99

Current Transformer Type CM 15 FREE SHIPPING $550.00

Current Transformer Type CM 15 FREE SHIPPING $550.00

SQUARE D CLASS 9070 TYPE EO-81 NEW INDUSTRIAL CONTROL TRANSFORMER 9070EO81 $500.00

RONK TYPE 2P/4P MODEL 92 ROTO-CON MARK II ROTARY TRANSFORMER $520.00

Transformer New 25 KVA Dry Type by NWL $500.00

Square D Dry Type Transformer 1 PH, 3KVA, 3S39F1S $350.00

3 Phase Dry Type Distribution Transformer 208 Primary volts delta 480/277 Y sec $455.00

SOLA 23-23-125-8 TYPE CVS CONSTANT VOLTAGE TRANSFORMER NEW CONDITION NO BOX $425.00

HEAVY-DUTY TYPE SI TRANSFORMER 1.5KVA *NNB* $429.00

Square D 1.5 S1F Type S 1.5KVA Transformer $400.00

SQUARE D 5S1F DRY TYPE TRANSFORMER, SINGLE PHASE, 5KVA, TYPE 3R ENCLOSURE, 1PH - $425.00

GE Transformer 9T21B1005 G2 Single Phase 240/480 120/240 7.5KVA Type 1 NEW $300.00

SQUARE D COMPANY DRY TYPE TRANSFORMER SINGLE PHASE $400.00

REO Transformer Reostat type RRTWM4 $396.00

USED Staco Type 2520 Variable Transformer 2.80kVA $400.00

SQUARE D CLASS 9070 TRANSFORMER DISCONNECT TYPE SK1000G1 SERIES A LOT OF 2 $400.00

SQUARE D 3S1F NEW 3 KVA DRY TYPE TRANSFORMER 3S1F $300.00

WESTINGHOUSE T-6E196 NEW 3 KVA TYPE EP TRANSFORMER T6E196 $300.00

Electronic Test ESS TFX 5318 Powerstat Type 116 / Hevi-Duty Transformer $324.35

GENERAL ELECTRIC TRANSFORMER 9T51B0030 TYPE QB 1PH 1kVA $355.00

Power Magnetics 14 KVA Transformer #5435 Type D 1 Ph Pri 440V Sec 90-110 V $350.00

Dominit 50 KVA Substation Type Transformer $350.00

New 5 KVA Transformer Acme T2531741S outdoor type encapsulated 277 volt primary $350.00

Staco Type 171-3 3-Ganged Variac Variable Transformer 100 Series $341.90

SQUARE D CLASS 9070 TYPE EO-71 NEW INDUSTRIAL CONTROL TRANSFORMER 9070EO71 $300.00

HITRAN 15KVA TRANSFORMER, 1PH, TYPE-ISO, 460V, 115X230Y COMES W/ 30 DAY WARRANTY $325.00

FEDERAL PACIFIC 15 KVA DRY TYPE TRANSFORMER CLASS AA GOOD WORKING CONDITION $325.00

P003KBKB Hammond Dry Type Transformer 3KVA 480-208Y/120V Nema 3R excellent used $245.00

General Electric Transformer Dry Type QMS3 9T21J9702 7.50 KVA 3 Ph 460/460Y-266 $185.25

NIB GRAUS TYPE JGD06 TRANSFORMER 30671-7 20A 306717 $300.00

General Electric Dry Type Transformers (2) Units $250.00

Southern Transformer 54 kva Transformer Type AA $300.00

EGS ELECTRICAL GROUP HS5F3AS HEAVY DUTY TRANSFORMER 3.00 KVA TYPE HS $238.99

VINTAGE GENERAL RADIO CO. VARIAC VARIABLE TRANSFORMER TYPE 1OO-R $250.00

SQUARE D 9070 TYPE SK 500G1 SK500G1 TRANSFORMER DISCONNECT BOX $288.00

NEW GE POTENTIAL TRANSFORMER TYPE: JVM-3 $249.00

Sola 23-22-150 Harmonic Neutralized Transformer type CVS 500 VA $271.74

ISMET Transformer Type: MTDN-1016 IN: 200/230/400/420/460v Out: 0/230/0/24v $259.99

Square D Company Transformer 45 KVA 54.1A 60Hz Class AA Type 2 480 208Y/120 XFMR $259.99

Sola Hevi Duty Type CVS Constant Voltage Transformer 23-23-125-8 120VAC NIB $254.99

Huber Control Circuit Transformers 85/1036 Type EI200 $250.00

Sangamo Weston Inc. Potential Transformer Type SMP-150 7200Primary Voltage $249.99

GE General Electric 9T55Y53 Transformer Type IP *NEW $225.00

ACME Transformer Control Type FS-2-2000 240/480-120 $166.25

GE TRANSFORMER # 9T51B0030 TYPE: QB VOLTAGE: 120×240 $229.00

G.E.Current Transformer P/N 755X042011 Type JKM-5 150:5 $200.00

ACME TRANSFORMER DRY TYPE 3.0 KVA 1 PHASE T-2-53013-4S $220.00

Transformer Type Questions

How to Choose a Transformer

When choosing a transformer, there are two primary concerns: the load and the application. Several factors must be evaluated carefully while making the choice, to ensure that the needs of both primary concerns are met.

To use a cliché, it is typically a ‘no-brainer’ to choose smaller transformers. A unit with a kVA rating that is larger from the anticipated load can quickly be picked up. But if you are selecting a large unit for an electrical utility system, to be part of a large distribution network, you are typically making a much larger investment; thus the evaluation process is much more detailed and elaborate. With over 90 years of experience in this industry, Pacific Crest Transformers has put together a quick checklist to help you make your choice judiciously.

Top Questions

There are three major questions that influence your choice:

• Does the chosen unit have enough capacity to handle the expected load, as well as a certain amount of overload?

• Can the capacity of the unit be augmented to keep up with possible increase in load?

• What is the life expectancy of the unit? What are the initial, installation, operational, and maintenance costs?

Evaluation Factors

The cost and capacity of the transformer typically relate to a set of evaluation factors:

1. Application of the Unit

Transformer requirements clearly change based on the application.

For example: in the steel industry, a large amount of uninterrupted power is required for the functioning of metallurgical and other processes. Thus, load losses should be minimized – which means a particular type of transformer construction that minimizes copper losses is better suited. In wind energy applications, output power varies a great extent at different instances; transformers used here should be able to withstand surges without failure. In smelting, power transformers that can supply constant, correct energy are vital; in the automotive industry, good short-term overload capacity is a necessary attribute. Textile industries, using motors of various voltage specifications, will need intermittent or tap-changing transformers; the horticulture industry requires high-performance units that suit variable loading applications with accurate voltage.

These examples serve to underline that type of load (amplitude, duration, and the extent of non-linear and linear loads) and placement are key considerations. If standard parameters do not serve your specific application, then working with a manufacturer that can customize the operating characteristics, size and other attributes to your needs will be necessary. Pacific Crest regularly builds custom transformers for unique applications.

2. Insulation Type (Liquid-Filled or Dry Type)

While there is still debate on the relative advantages of the available types of transformers, there are some performance characteristics that have been accepted:

• Liquid-filled transformers are more efficient, have greater overload capability and longer life expectancy.
• Liquid-filled units are better at reducing hot-spot coil temperatures, but have higher risk of flammability than dry types.
• Unlike dry type units, liquid-filled transformers sometimes require containment troughs to guard against fluid leaks.

Dry type units are usually used for lower ratings (the changeover point being 500kVA to 2.5MVA). Placement is also a crucial consideration here; will the unit be indoors serving an office building/apartment, or outdoors serving an industrial load? Higher-capacity transformers, used outdoors, are almost always liquid-filled; lower capacity, indoor units are typically dry types. Dry types typically come in enclosures with louvers, or sealed; varnish, vacuum pressure impregnated (VPI) varnish, epoxy resin or cast resin are the different types of insulation used.

3. Choice of Winding Material

Transformers use copper or aluminum for windings, with aluminum-wound units typically being more cost-effective. Copper-wound transformers, however, are smaller – copper is a better conductor – and copper contributes to greater mechanical strength of the coil. It is important to work with a manufacturer that has the capability and experience to work with either material to suit your specific requirement.

Read more on how to choose a transformer

About the Author

Mike Dickinson began his carrier in transformer industry in 1972 at Pacific Crest Transformers. Currently Mike is in charge of Business Development at PCT .
Pacific Crest Transformers is a leader in the design and construction of liquid filled distribution transformer

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