400 Hz Transformers

4D Series

  • Category Power Transformer
  • Type Light Weight, High Altitude, Rugged Environment
  • Power Type Three Phase, 400 Hz
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4D Series Introduction

These 3-phase 400 Hz MIL-PRF-27 (MIL Grade 5 Class S Construction) power transformers are designed to meet the light weight and high temperature requirements of airborne and military electronics. The transformers are encapsulated for use in MIL-STD-810 environments. A unique design enables these transformers to be used in a variety of configurations. Standard inputs include both DELTA and WYE Configurations. The output has three separate windings that can be connected with DELTA or WYE. The 4D Series features a low profile design to save space. Standard power levels range from 90 to 3,000 watts. These transformers are easily modified to specific requirements.

Key Features

  • 4 Different Inputs Available
  • Capable of operation in Wild Frequency systems (380-1000 Hz)
  • DELTA or WYE Selectable Outputs
  • 60 VA to 5000 VA Power
  • Designed for Light Weight and High Temperature Requirements of Airborne, Shipboard, and Ground Mobile Applications
  • MIL-PRF-27 Grade 5 Class S Construction

Specifications

  • AC INPUT (VAC)
    WYE: 115V L-Com Standard
    WYE: 200V L-L Standard
    DELTA: 115V L-L Suffix A
    DELTA: 200V L-L Suffix B
  • AC INPUT (HZ)
    400Hz ± 20 Hz 3 Phase
  • EFFICIENCY
    Ranges from 90% to 95% Typical
  • LOAD REGULATION
    10% No Load to Full Load
  • SECONDARY VOLTAGE TOLERANCE
    Within 5% when Measured at Full Load and Listed Input
  • DIELECTRIC WITHSTANDING VOLTAGE
    1500 Vrms
  • STANDARD POWER LEVELS (VA)
    90, 120, 150, 200, 270, 375, 450, 500, 650, 800, 1000, 1500, 2000, 2500, 3000, 3500, 5000
    Additional Power Levels Available upon Request
  • STANDARD OUTPUTS (VOLTS)
    5, 12, 15, 20, 28, 48, 115
    Additional Outputs Available upon Request
  • OPERATING TEMPERATURE RANGE
    Maximum Operating Ambient Temperature 80° C. (For units above 1000 Watts 60° C.)
  • CONSTRUCTION
    90VA to 375VA Per MIL-PRF-27, Grade 5 Class S
    500-3000 VA to meet MIL-PRF-27, Grade 4, Class S
  • MATERIALS/FINISHES
    90VA to 375 VA - Fiberglass Case
    500 VA and above - Metal Case

Dimensions

Size A B C D E F G H J K
1
2
3 		2.90
2.90
3.65 		2.40
2.70
2.80 		1.45
1.55
1.70 		2.50
2.50
3.15 		2.00
2.30
2.30 		0.20
0.20
0.25 		0.45
0.45
0.82 		0.85
0.85
1.22 		0.20
0.20
0.20 		6-32
6-32
6-32
4
5
6 		3.65
3.65
4.95 		3
3
3.2 		1.7
1.95
1.9 		3.15
3.15
4.45 		2.5
2.5
2.7 		0.25
0.25
0.25 		0.82
0.82
1.47 		1.22
1.22
1.87 		0.2
0.2
0.2 		8-32
8-32
8-32
7
8
9
10 		5.31
5.62
5.31
6.12 		4.50
4.20
4.75
4.75 		2.00
2.31
2.31
2.31 		4.31
4.62
4.31
5.12 		3.50
3.20
3.75
3.75 		0.50
0.50
0.50
0.50 		0.62
0.78
0.78
0.78 		1.37
1.37
1.53
1.53 		—
—
—
— 		10-32
10-32
10-32
10-32

Load current more than 20A. Dimension H = 1.56
Dimension tolerance: D, E ±.02; all others ±.04

NOTE: Sizes 7-10 only:
Up to 20A – No. 6 terminal screws
Above 20A – No. 8 terminal screws

Mechanical Drawings

 

Circuit Diagram

Standard Model List

Volts RMS Load Current (Amps) Volts RMS Load Current (Amps) Size Weight Lbs. (Typical) Model Number QPL Model Number
5 6.00
8.00
10.00
13.34
20.00
30.00 		8.66
8.66
8.66
8.66
8.66
8.66 		3.47
4.62
5.78
7.70
11.55
17.32 		1
2
3
4
7
8
 1.3
1.6
2.3
2.4
6.1
6.8 		4D5-90
4D5-120
4D5-150
4D5-200
4D5-300
4D5-450 		M27/344-01
M27/345-01
M27/346-01
M27/347-01
**
**
12 2.50
3.34
4.17
5.56
7.50
10.42
13.88
18.05
22.22
27.78 		20.8
20.8
20.8
20.8
20.8
20.8
20.8
20.8
20.8
20.8 		1.45
1.93
2.41
3.21
4.33
6.02
8.01
10.42
12.82
16.02 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D12-90
4D12-120
4D12-150
4D12-200
4D12-270
4D12-375
4D12-500
4D12-650
4D12-800
4D12-1000 		M27/344-02
M27/345-02
M27/346-02
M27/347-02
M27/348-01
M27/349-01
**
**
**
**
15 2.00
2.67
3.34
4.45
6.00
8.34
11.11
14.44
17.78
22.23 		26
26
26
26
26
26
26
26
26
26 		1.16
1.54
1.93
2.57
3.47
4.82
6.41
8.33
10.25
12.82 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D15-90
4D15-120
4D15-150
4D15-200
4D15-270
4D15-375
4D15-500
4D15-650
4D15-800
4D15-1000 		M27/344-03
M27/345-03
M27/346-03
M27/347-03
M27/348-02
M27/349-02
**
**
**
**
20 1.50
2.00
2.50
3.34
4.50
6.25
8.33
10.83
13.33
16.67 		34.6
34.6
34.6
34.6
34.6
34.6
34.6
34.6
34.6
34.6 		0.87
1.16
1.45
1.93
2.60
3.61
4.81
6.26
7.70
9.63 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D20-90
4D20-120
4D20-150
4D20-200
4D20-270
4D20-375
4D20-500
4D20-650
4D20-800
4D20-1000 		M27/344-04
M27/345-04
M27/346-04
M27/347-04
M27/348-03
M27/349-03
**
**
**
**
28 1.08
1.43
1.79
2.38
3.22
4.47
5.95
7.74
9.52
11.91 		48.5
48.5
48.5
48.5
48.5
48.5
48.5
48.5
48.5
48.5 		0.62
0.83
1.03
1.38
1.86
2.58
3.43
4.46
5.50
6.87 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D28-90
4D28-120
4D28-150
4D28-200
4D28-270
4D28-375
4D28-500
4D28-650
4D28-800
4D28-1000 		M27/344-05
M27/345-05
M27/346-05
M27/347-05
M27/348-04
M27/349-04
**
**
**
**
48 0.63
0.84
1.05
1.39
1.88
2.61
3.47
4.51
5.56
6.95 		83.1
83.1
83.1
83.1
83.1
83.1
83.1
83.1
83.1
83.1 		0.36
0.49
0.61
0.81
1.09
1.51
2.00
2.60
3.20
4.01 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D48-90
4D48-120
4D48-150
4D48-200
4D48-270
4D48-375
4D48-500
4D48-650
4D48-800
4D48-1000 		M27/344-06
M27/345-06
M27/346-06
M27/347-06
M27/348-05
M27/349-05
**
**
**
**
115 0.26
0.35
0.44
0.58
0.79
1.09
1.45
1.88
2.32
2.9 		200
200
200
200
200
200
200
200
200
200 		0.15
0.2
0.25
0.34
0.45
0.63
0.83
1.08
1.33
1.66 		1
2
3
4
5
6
7
8
9
10 		1.3
1.6
2.3
2.4
2.8
3.8
6.1
6.8
7.6
8.1 		4D115-90
4D115-120
4D115-150
4D115-200
4D115-270
4D115-375
4D115-500
4D115-650
4D115-800
4D115-1000 		M27/344-07
M27/345-07
M27/346-07
M27/347-07
M27/348-06
M27/349-06
**
**
**
**