Solar Electronics Company logo

Model 7399-3 Spike Generator 2500 V

for conducted transient susceptibility testing

Model 7399-2 Spike Generator 2500 V
back arrow
next arrow
  DESCRIPTION top of page button

Effective March 2, 2017
Paragraph Apparatus paragraph c of MIL-STD-1399-300B refers to Solar Spike Generators Models 7399-1 and 7933-2 needing modifications in order to accept an independent 60 Hz sync input.

In response to the changes in MIL-STD-1399-300B, we have incorporated an independent 60 Hz sync input function. This is accomplished through the addition of a selector switch position and associated internal wiring. The discharge switch has also been updated to a solid-state type switch. Due to these changes, we have rolled the part number of the generator from 7399-2 to 7399-3.

The Solar Model 7399-3 Spike Generator is capable of providing high energy spikes with amplitudes adjustable up to 2500 V peak into low impedance loads, as required in MIL-STD-1399, Section 300B. The shape of the spike approximates Figure 6 of MIL-STD-1399-300B. (Solar Model 7399-3 is specified in MIL-STD-1399-300B.)

Modes of operation:
Repetitive spikes up to 2500 V peak at two pulse per minute
Single non-synchronous spike actuated by a pushbutton on the panel
Sync functions provide for placing the spike on the power frequency waveform of 50, 60 or 400 Hz power lines. The spike can be moved to any point on the sine wave from 0 to 360°.

A SYNC TEST function is provided for adjusting the trigger circuit of the associated oscilloscope for response to a single pulse. After this adjustment of the scope, it is ready for viewing the spike. When the READY lamp indicates the storage circuit has been charged to the selected peak voltage, the pushbutton is depressed which triggers the sync circuit of the oscilloscope.

All connections to the Solar Model 7399-3 are isolated from the chassis. The chassis is grounded through the third wire in the power cord in accordance with safety regulations. QR Code generator

  SPECIFICATIONS top of page button
Peak amplitude: No load 100-2500 V100-2000 V 0.5 Ω load
Rise time: No load ≈1 µS 0.5 Ω load ≈2 µS
Duration: No load to 50% of peak 0.5 Ω load ≈50 µS≈31 µS
Duration to zero: No load crossover ≈100 µS 0.5 Ω load ≈77 µS
Repetition rate: 2 pulses per minute
Phase adjustment: Spike position adjustable from 0 to 360 on 50, 60 or 400 Hz sine wave
Internal impedance: Less than 0.1 Ω
Peak output power: 8 MW into 0.5 Ω load
Power current in series injection mode: Handles up to 100 A of current at power frequencies
Power requirements: 115 V 60 Hz, 2.0 A (230 V 50 Hz, 1.0 A available)
Dimensions: 12.56" wide x 21.06" high x 15.50" deep (31.9 cm x 53.5 cm x 39.4 cm)
Weight: 90 pounds plus 5 pounds for accessories (43.09 kg)
Total shipping weight: 120 pounds (54.4 kg)
  FIGURES top of page button
  COMPONENTS (supplied) top of page button
Solar Type 739945 Plug-in Unit
For series injection of spike into power lines
Solar Type 739950 Plug-in Unit
For parallel injection (using external components)
Mating connectors
Two 100 A styles, for power connections; two 50 A styles, for external resistor
  USEFUL ACCESSORIES (not included) top of page button
Type 6220-1B Transformer
Can be used as a high current series inductor
Type 7032-1 Isolation Transformer
For removing power ground from the case of the scope (see Figure 23, MIL-STD-1399-300B)