The IT-25B Impulse Spark Tester is designed to

comply with the rigorous test requirements of Military

Specifications MIL-C-13777E, MIL-W-16878, and

NEMA Standards for hook-up wire used in high temperature

wire applications. This method is favored as an

alternate to wet dielectric test.

This unit produces a repetitive fast-rise negative

voltage pulse, followed by an exponentially damped

sinusoid having a frequency of several kilohertz. The

electrode voltage is regulated against line voltage and

load current changes. A repetition rate of 250 I.P.S.

allows two test pulses in a 2 inch electrode at a wire

speed of 1250 ft./min. Higher speeds may be attained

by using a longer electrode when specifications permit.

The phase splitting feature allows for wire

whip and vibration while retaining the high sensitivity

necessary to insure the detection of low current

arc faults. Process control output is provided

for the operation of machinery or an external alarm.