An Integrated Publishing, Inc. Site

An Integrated Publishing Website

MIL-DTL-23659 Initiators, Electric, General Design Specification ForThis specification furnishes general requirements for design and establishes uniform methods for testing electric initiators and electric initiator subassemblies. The purpose of the testing program is to determine the electric characteristics, soundness of mechanical design, output, and resistance to deleterious service environments. For purposes of this specification the term electric initiator includes items classified in FSC 1377 such as hot wire initiators, exploding bridgewire initiators, exploding foil initiators, conductive mix initiators, etc. Electric primers are not covered in this specification. All requirements for in-line initiators used in safety sensitive, non-interrupted energetic materials train applications are contained in Appendix A. Requirements for all other initiators are in the main body of this document.

Pages 1 - - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34|||

MIL-DTL-23659F

APPENDIX A

High Voltage Switch

Charging

Bleed-Down

Resistor

Load

(Initiator

Connector)

High Voltage

Input

High

Voltage

Capacitor

1000:1 High

CVR

Voltage Monitor

FIGURE A-1. FIRESET SCHEMATIC

TABLE A-2. MAXIMUM ALLOWABLE ELECTRICAL SENSITIVITY (MAES)

FIRESET PARAMETER REQUIREMENTS AT 500 AND 1000 VOLTS

Parameter

Requirement

0.50 Ω load

0.50 Ω load at

Test Condition

Short at 500

Short at 1000

Volts

at 500 Volts

Volts

1000 Volts

(Ringdown)

10% to 90% Risetime

93 ns max.

105 ns max.

93 ns max.

105 ns max.

(tr)Time to first peak

83 ns min.

95 ns min.

83 ns min.

95 ns min.

First Peak Current (I1)

800 Amps

380 Amps

1700 Amps

780 Amps

minimum

Second Peak Current (I2)

490 Amps

1150 Amps

minimum

Period (Ćt)

430 ns

N/A

425 ns

N/A

maximum

P /2

 i Rdt

N/A

9.5 mJ

N/A

40 mJ

Delivered Energy

- 25 -