Power Partners’ T-T, or T-connected, overhead distribution transformers can be used for most three-phase applications up to 500 kVA. T-connected transformers consist of two single-phase core/coil assemblies. This type of connection is also referred to as a Scott-T connection.

For three-phase applications in which large motors are the load and these motors are frequently started, Triplex designed three-phase transformers are required rather than T-T transformers. Oil field pumping loads and some irrigation pumping loads should use only the Triplex designs as well. ISO 9001: 2008 Certified

Standard Features

Wound core with step-lap joints for increased efficiency and lower noise levels.

Progressively wound coils with adhesive resins on insulating paper or conductors for increased short circuit strength, efficiency, and thermal strength.

CSP protection package available as an option for increased protection against surge currents, short circuits, and overloads:

  1. Primary protective links
  2. Surge arresters
  3. Secondary circuit breaker
  4. Secondary breaker operating handle with emergency overload reset and overload signal light

Self-venting and resealing cover that eliminates the need for an auxiliary pressure-relief device and offers increased safety through higher tank withstand.

Durable, corrosion-resistant paint finish.

Cover has 15 kV dielectric insulation and increased resistance to corrosion. The cover is sloped 15, preventing water from collecting and thereby reducing the chances of corrosion and leaking.

Lighter weight, lower cost, and cleaner installations than conventional three-phase design.

Oil fill-plug

Cover ground-strap

Tank ground-pad

Laser-etched, anodized, aluminum nameplate with bar-coded serial number

Durable, corrosive-resistant paint finish

The following additional features are all standard on self-protected type CSP units (CSP protection package consists of four components that work together to provide complete, self-contained protection against surge currents, short circuits, and overloads):

  • Primary protective link
  • Surge arrester
  • Secondary circuit breaker
  • Secondary breaker operating handle with emergency overload reset
  • Overload signal light if desired

  • 30 – 225 kVA
  • 65C rise
  • 60 Hz standard, 50 Hz optional
  • High voltages: 13,800 and below
  • Low voltages: 208T/120, 240T x 480T, and 480T/277

Transformer BIL ratings:

Primary BIL
2400 T 60 kV
4160 T 60 kV
7200 T 75 kV
8320 T 75 kV
12,000 T 95 kV
12,470 T 95 kV
13,200 T 95 kV
13,800 T 95 kV

Standard Design Dimensions and Weights. All dimensions are approximate.

kVA Height
Inches
(mm)		 Width
Inches
(mm)		 Depth
Inches
(mm)		 Tank
Dia
Inches
(mm)		 Distance
Between
Hanger
Brackets		 Weight
Lbs.
(kg)		 Shipping
Weight
Lbs.
(kg)		 Oil
Gallons
(L)
High Voltages 2400T, 4160T, 4800T
30 49
(1245)		 26
(660)		 25
(635)		 17.5
(445)		 11.25
(286)		 685
(311)		 720
(327)		 35
(133)
45 49
(1245)		 29
(737)		 28
(711)		 20
(508)		 23.25
(591)		 990
(450)		 1035
(470)		 44
(167)
75 49
(1245)		 33
(838)		 28
(711)		 20
(508)		 23.25
(591)		 1100
(500)		 1175
(534)		 52
(198)
112.5 57
(1448)		 31
(787)		 30
(762)		 22
(559)		 36
(914)		 1530
(695)		 1625
(739)		 62
(236)
150 57
(1448)		 40
(1016)		 30
(762)		 22
(559)		 36
(914)		 1770
(805)		 1940
(836)		 70
(266)
225 61
(1550)		 37
(940)		 34
(864)		 24
(610)		 36
(914)		 2215
(1007)		 2303
(1047)		 81
(308)
300 64
(1626)		 41
(1041)		 36
(914)		 27
(686)		 36
(914)		 2750
(1250)		 2860
(1300)		 98
(372)
500 78
(1981)		 45
(1143)		 42
(1067)		 27
(686)		 – 3560
(1616)		 3650
(1659)		 118
(448)
High Voltages 12,000T, 12,470T, 13,200T, 13,800T
30 54
(1372)		 23
(584)		 25
(635)		 17.5
(445)		 11.25
(286)		 700
(318)		 735
(334)		 38
(144)
45 54
(1372)		 29
(737)		 28
(711)		 20
(508)		 23.25
(591)		 905
(411)		 965
(438)		 43
(163)
75 54
(1372)		 33
(838)		 28
(711)		 20
(508)		 23.25
(591)		 1175
(534)		 1225
(557)		 50
(190)
112.5 62
(1575)		 33
(838)		 30
(762)		 22
(559)		 36
(914)		 1505
(684)		 1565
(711)		 59
(224)
150 62
(1575)		 40
(1016)		 30
(762)		 22
(559)		 36
(914)		 1725
(784)		 1780
(809)		 65
(247)
225 61
(1549)		 37
(940)		 34
(864)		 24
(610)		 36
(914)		 2285
(1040)		 2275
(1034)		 84
(319)
300 69
(1753)		 41
(1041)		 36
(914)		 27
(686)		 36
(914)		 2915
(1325)		 3015
(1370)		 100
(380)
500 80
(2032)		 45
(1143)		 42
(1067)		 27
(686)		 – 3815
(1734)		 3900
(1772)		 123
(467)

All approximate dimensions shown reference designs with 2.5% taps.

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