The Coaxial Shunt for Measurement of Current Pulses of Artificial Lightning with the Amplitude up to ±220 kA

ANALYSIS OF CHARACTERISTICS AND POSSIBILITIES OF HIGH-VOLTAGE COMPLEX SCIENTIFIC-&-RESEARCH PLANNING-&-DESIGN INSTITUTE «MOLNIYA» OF NTU «KHPI» FOR THE TESTS OF OBJECTS OF ENERGY, ARMAMENT, AVIATION AND SPACE-ROCKET TECHNIQUE ON ELECTRIC SAFETY AND EMC

“…In contrast to the high-voltage test installations created in foreign countries in the field of electrical safety, EMC, and the resistance of technical facilities to the action of artificial lightning and PEMIs according to [4][5][6][7][8][9][10][12][13][14][15][16], the high-current high-voltage test electric equipment available in Ukraine is characterized by the originality of constructing its discharge electric circuits with a global priority and made of domestic components, structural and insulating materials [17][18][19][20][21][22][23][24]. For well-known reasons, the acquisition of expensive foreign electrical installations is an unrealistic task for us.…”

The Metrology Support in Ukraine of Tests of Objects of Energy, Aviation and Space-Rocket Engineering on Resistibility to Action of Pulses of Current (Voltage) of Artificial Lightning and Commutation Pulses of Voltage

“…Similar shunt designs are characterized by their small inductance values (not more than 10 nH) and active resistance (no more than 0.2 m), which provides insignificant influence of the own electrical parameters of the measuring shunt on the electromagnetic processes occurring in the load. A significant difference between the designs of these highcurrent shunts from known (for example, described in [6]) is the use in them instead of a thin-walled (with a thickness of not more than 0.3 mm) high-resistance manganin disk from which the drop in the pulsed voltage from the passage of a measured current pulse is taken, a disk of thickness of 1 to 2 mm from stainless steel 12Х18Н10Т [10,11]. Such a technical improvement of the design of the high-resistance measuring disk in the high-voltage highcurrent shunt (see Fig.…”

“…In the shown in Fig. 4 divider of the type SDN-300 there are two coaxial connectors 1:1 and 1:2, intended for the coordinated connection of their outputs to the inputs of the measuring channels of digital storage oscilloscopes (DSO) [6,10]. Fig.…”

“…External view of the improved coaxial disk shunt type SC-300M1, intended for measurement in the micro-and millisecond ranges of damped sinusoidal and aperiodic current pulses of artificial lightning with amplitude up to ±220 kA in the high-current discharge circuit of a powerful high-voltage LCG with their integral of action up to 3•10 6 J/[10] External view of the improved coaxial shunt type SC-300M2 designed to measure in the coordinated mode of operation of its cable signal transmission line in the micro-and millisecond ranges of current pulses of artificial lightning with amplitude up to ±220 kA in the high-current discharge circuit of high-voltage LCG with their integral of action up to 15•10 6 J/[11] …”

“…External view of the SC-300M1 measuring shunt connected to the input of an additionally shielded coaxial RF cable of the RK 75-7-11 type with a length of 70 m, the output of which is connected to a shielded matching voltage divider of the type SDN-300 with two output coaxial connectors 1:1 and 1:2 for the coordinated connection of the measuring channels of the three DSO (for example, Tektronix TDS 1012 series) to them, while simultaneously registering of three components of the total current pulse of the artificial lightning in the highcurrent discharge circuit of the LCG with different ATPs[6,10] External view of the placement of three Tektronix TDS 1012 digital storage oscilloscopes that register in parallel useful electrical signals from one SC-300M1 measuring shunt in a buried screened measuring hopper designed for metrology support of field testing of various technical objects for lightning resistibility[9] …”