Model: ST 28978

Power Transformer

Special Features:

One primary winding; five secondary windings with first, second, fourth, and fifth windings center tapped

Properties:

Reliability Indicator
Not established
Center To Center Distance Between Mounting Facilities Parallel To Length
2.190 inches single mounting facility single center group and 2.210 inches single mounting facility single center group
Center To Center Distance Between Mounting Facilities Parallel To Width
1.510 inches single mounting facility single center group and 1.530 inches single mounting facility single center group
Frequency Rating
400.0 hertz single component
Input-output Phase Relationship
Three phase to single phase single component and three phase to two phase single component
Transformer Winding Connection Type
Wye-open delta
Body Length
2.860 inches
Body Width
2.250 inches
Body Height
2.300 inches
Maximum Operating Temp
170.0 degrees celsius
Inclosure Type
Fully enclosed
Mounting Facility Quantity
4 single group
Mounting Method
Threaded hole single group
Winding Function And Quantity
1 primary single component and 5 secondary single component
Thread Size
0.138 inches single group
Winding Operating Current
1.02 amperes ac single component 3rd secondary
Winding Operating Current
11.0 milliamperes ac single component 4th secondary
Winding Operating Current
38.0 milliamperes ac single component 2nd secondary and 133.0 milliamperes ac single component 2nd secondary
Winding Operating Current
25.0 milliamperes ac single component single primary and 825.0 milliamperes ac single component single primary
Winding Operating Current
3.0 milliamperes ac single component 1st secondary and 200.0 milliamperes ac single component 1st secondary
Winding Power Rating
0.638 volts-amperes single component 4th secondary
Winding Power Rating
22.8 volts-amperes single component 1st secondary
Winding Power Rating
26.5 volts-amperes single component 3rd secondary
Winding Power Rating
9.3 volts-amperes single component 2nd secondary
Winding Operating Voltage
16.00 ac volts single component 2nd secondary and 19.00 ac volts single component 2nd secondary and 54.00 ac volts single component 2nd secondary and 70.00 ac volts single component 2nd secondary
Winding Operating Voltage
20.00 ac volts single component 1st secondary and 37.00 ac volts single component 1st secondary and 94.00 ac volts single component 1st secondary and 114.00 ac volts single component 1st secondary
Winding Operating Voltage
3.47 ac volts single component single primary and 26.00 ac volts single component single primary and 200.00 ac volts single component single primary
Winding Operating Voltage
26.00 ac volts single component 3rd secondary
Winding Operating Voltage
58.00 ac volts single component 4th secondary
Thread Series Designator
Unc single group
Terminal Type And Quantity
23 tab, solder lug
NSN
5950-00-946-3305
Part Number
ST 28978
Description
Transformer,power
CAGE
97102

Part ST 28978 NSN 5950-00-946-3305

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
32496
FIIG:
A058B0
Concept No.:
1
App. Key:
J
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
2.9 X 2.3 X 2.3
Paclk Weight:
2.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
M
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
063420
UFC:
35355
LTL:
RATING VARIABLE
LCL:
--
WCC:
595
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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