Identify your application ?

 

A transformer is a static piece of electrical equipment which transfers power from one voltage system to another by means of electromagnetic induction.  The reason for using a transformer is to match the voltage of the load to line voltage supplied by the utility.

 

TO SELECT THE RIGHT TRANSFORMER FOR YOUR SPECIFIC NEEDS, DETERMINE THE FOLLOWING

 

§         Primary voltage of transformer (available voltage)

§         Secondary voltage (voltage required for load equipment)

§         Frequency (in Hz) and phases (normally single or three phase)

§         KVA load (add total number of pieces of equipment involved).  Consider possible      future additions

§         Is secondary voltage 2 wire or 3 wire (single phase) or 3 wire or 4 wire (three      phase)?

§         Is double-wound or auto transformer required?

§         Is transformer to be floor or wall-mounted?

§         Is transformer for use indoors or outdoors?

 

USE THESE CHARTS TO DETERMINE TRANSFORMER SIZE REQUIRED

 

SINGLE PHASE

TRANSFORMER FULL LOAD CURRENT IN AMPS

 

 

KVA

RATED LINE VOLTAGE

120

240

480

600

1

8.3

4.2

2.1

1.6

2

16.7

8.4

4.2

3.2

3

25.0

12.5

6.3

5.0

5

41.7

20.8

10.4

8.3

7.5

62.5

31.2

15.6

12.5

10

83.4

41.6

20.8

16.7

15

125

62.5

31.2

25.0

25

208

104

52.1

41.6

37.5

312

156

78.2

62.5

50

416

208

104

83.3

75

625

312

156

125

100

833

416

208

167

150

1250

625

312

250

167

1391

696

348

278

250

2083

1041

521

417

333

2775

1387

684

555

500

4166

2083

1042

833

 

SINGLE PHASE CALCULATION

 

kVA = Volts x Amps

                   1000

 

Amps = kVA x 1000

                   Volts

 

THREE PHASE

TRANSFORMER LOAD CURRENT PER LINE IN AMPS

 

 

KVA

RATED LINE VOLTAGE

208

240

480

600

6

16.6

14.4

7.2

5.8

9

25.0

21.6

10.8

8.7

10

28.0

24.0

12.0

9.6

15

41.6

36.1

18.1

14.4

30

83.3

72.3

36.1

28.9

45

125

108

54.0

43.2

75

208

181

90.5

72.1

112.5

312

272

136

108

150

416

360

180

144

225

624

541

270

216

300

832

722

361

288

450

1250

1080

542

433

500

1388

1203

601

481

600

1666

1445

722

578

 

THREE PHASE CALCULATION

 

kVA = 1.73 x Volts x Amps

                  1000

 

Amps = kVA x 1000

             1.73 x Volts

 

kVA

SOUND LEVEL (AVERAGE)

0-9

40 db

10-50

45

51-150

50

151-300

55

301-500

60

501-600

62

 

OPTIONS

 

§         Double electrostatic shielding is standard on all Marcus drive isolation and K-      Factor  transformers and is also available on all our distribution transformers

 

§         Sprinkler shields are available on request

 

§         All Marcus transformers operate quietly; if lower sound levels are required, we       can accommodate your needs

 

§         Space limitations do not permit us to show every possible voltage.  Ask about       special  regional and custom voltages

 

§         Special tap arrangements

 

§         Anti-vibration pad kits (model AVP4)

 

 

TRANSFORMER SELECTION GUIDE

 

Select the type of transformer you need, its kVA rating, primary voltage, secondary voltage and suffix from the chart below.

 

 

Type

KVA

Primary Voltage

Secondary Voltage

Suffix

MS – Single Phase                      

 

A – 600

1-120/208

50Hz – EUR

MT – Three Phase                        

 

B-480

2-120/240

Elec. Shield – S

MSWP – Outdoor Single Phase

 

C-416

3-240

115°C Rise – F

MTWP – Outdoor Three Phase

 

D-380

4-480/277

80°C Rise – B

RES – Epoxy Single Phase

 

E-347

5-600/347

Sprinkler Shield

– P

RET – Epoxy Three Phase

 

F-277

6 – 380/220

Core & Coil – CC

MK – K-Factor Rating

 

G-240

7 – 416/240

K – Factor – 4

MDI – Drive Isolation

 

H-208

8 - 120

K – Factor – 9

MAT – Auto Three Phase

 

I-240/480

9 – 220

K – Factor – 13

MATS – Auto Single Phase

 

J-2400

 

10 -220/127

K – Factor – 20

 

 

K-4160

11 -240/139

Stainless Steel

 

 

L-120

12 – 230

Enclosure- SS

 

 

M-440

13 – 230/133

 

 

 

N-460

14 – 120/208/240

 

 

 

O-575

15 – 440

 

 

 

P-230

16 – 440/254

 

 

 

Q-600/480

17 – 460

 

 

 

R-2300

18 – 460/266

 

 

 

S-220

19 – 480

 

 

 

T-120/240

20 – 400/231

 

 

 

U-550

21 – 208

 

 

 

 

22 – 380

 

 

 

 

23 – 600

 

 

 

 

24 – 110

 

 

 

 

25 – 347

 

 

 

 

26 – 575/332

 

 

MTZ – 0 PHASE SHIFT TRANSFORMER HARMONIC CANCELLATION TRANSFORMER

MTD – DOUBLE OUTPUT TRANSFORMER 0° AND 30° PHASE SHIFT

 

 

TYPE  KVA RATING  PRIMARY VOLTAGE  SECONDARY VOLTAGE  SUFFIX

600V PRIMARY, 208Y/120V SE

 

KVA

CATALOG NUMBER

 

30

MT 30A1 S

23

45

MT 45A1 S

29

50

MT 50A1 S

29

75

MT 75A1 S

29

112.5

MT 112.5A1 S

36

 

MT 30A1 S

Designates a three phase transformer, 30 kVA, 600V, 120/208 60Hz with an electrostatic shield

 

 

 
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