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The E1 Suitcase is a portable test system used to satisfy the MIL STD 188-125 requirement for E1 short-pulse direct current injection up to 1 kA. The E1 suitcase may be used with an included inductive coupler or a direct injection output adapter. The E1 suitcase is operated using a handheld fiber-optic remote control and includes a calibration fixture which uses a current transformer with NIST traceable components.

The Military Standard (MIL-STD) 188-125 establishes minimum requirements and design objectives for high-altitude electromagnetic pulse (HEMP) hardening of fixed1 ground-based facilities that perform critical, time-urgent command, control, communications, computer, and intelligence (C4I) missions.

Refer to the latest published standard for any information regarding the MIL-STD-188-125. Safe operating principles for high voltage and high current should be followed at all times when using the E1 suitcase. Operators must abide by the authority having jurisdiction at the end-user facility.

 sys acc

(A) test fixture with current transformer diagnostic, (B) direct connection output adapter, (C) inductive coupler, (D) ground strap, (E) fiber optic remote control, and (F) the 188-125 portable test system.

 General Specifications of 188-125 suitcase

Size 24.6 x 19.7 x 8.6 in
(62.5 x 50.0 x 21.8 cm)
Weight 90 lbs (40.9 kg)
Requirements: Pressurized dry breathing air (SCUBA CGA grade-E air) for bottle refill
Mains power to recharge internal battery ( 108-250 VAC, 47-63 Hz)
Peak output current 1.1 kAmp*
Peak output voltage (open circuit) 46 kV

*for direct injection

 Electrical characteristics of the 188-125 portable test system

Symbol Parameter Value Units
N Number of Marx generator stages 2
VE Maximum Erected voltage 46 kV
Vch Marx charge voltage 23 kV
Imax Peak pulsed current direct drive at maximum charge voltage 1.1 kA
Cstage Capacitance per Marx stage 20 nF
CE Erected capacitance 10 nF
Epulse Maximum Marx energy per pulse 10.5 J
Pressure switch close pressure (at output of bottle regulator) 29 PSI
Pressure switch open pressure 10 PSI
PMarx Maximum Marx Generator Pressure 75 +/- 2 PSI
Pblow Marx Initial vent pressure of the Marx blowout switch 20 PSI
Pblow regulator Initial vent pressure of the Panel Regulator Blowout switch 85 PSI