Model: 91-28-858

Power Transformer

Properties:

Reliability Indicator
Not established
Overall Length
Between 3.719 inches and 3.781 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
2.734 inches single mounting facility single center group and 2.766 inches single mounting facility single center group
Center To Center Distance Between Mounting Facilities Parallel To Width
2.424 inches single mounting facility single center group and 2.456 inches single mounting facility single center group
Overall Height
5.255 inches
Overall Width
Between 3.099 inches and 3.161 inches
Frequency Rating
50.0 hertz single component or 60.0 hertz single component
Input-output Phase Relationship
Single phase to single phase single component
Maximum Transformer Power Rating
160.0 volt-ampere single component
Winding Shielding Method
Core grounded single component
Maximum Operating Temp
130.0 degrees celsius
Inclosure Type
Hermetically sealed
Mounting Facility Quantity
4 single group
Mounting Method
Threaded hole single group
Winding Function And Quantity
1 primary single component and 1 secondary single component
Thread Size
0.190 inches single group
Winding Operating Current
5.8 amperes ac single component single secondary
Winding Operating Voltage
115.00 ac volts single component single primary
Winding Operating Voltage
28.00 ac volts single component single secondary
Test Data Document
81349-mil-t-27 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unf single group
Terminal Type And Quantity
5 wire hook
Specification Data
81349-mil-t-27/320 government specification
NSN
5950-01-250-1562
Part Number
91-28-858
Description
Transformer,power
CAGE
81349

A transformer consisting of one or more primary winding(s) and one or more secondary winding(s). It may be designed for direct connection to an alternating current source for purposes of changing the secondary volts and amperes or designed to eliminate metallic interconnection between circuits in an overall one to one voltage ratio, with or without additional output windings, or items designed to automatically maintain a constant output voltage within specified limits under varying input or load conditions. Also includes items having a provision for mechanically changing the turns ratio or inductive coupling in progressive increments by means of voltage taps, ratio adjuster, or devices oe similar design. For transformers having winding(s) common to both input and output circuits, see transformer (1), power, autotransformer. Excludes transformer (1), pulse.

Part 91-28-858 NSN 5950-01-250-1562

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
5.3 X 3.8 X 3.2
Paclk Weight:
8.2000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
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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Schedule B and Export
  • Schedule B: 8504314065
  • SITC: 77119
  • End Use: Generators, accessories
  • NAICS: 334416
  • USDA: 1

Freight Class: Transformers, having a power handling capacity 40 va or greater but less than 1 kva, nesoi

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