Measurement of High Voltages and High Currents
Measurement of High Voltages and High Currents
Measurement of High Voltages and High Currents
HIGH CURRENTS
• Peak voltmeters
• Sphere gaps
• Potential dividers with
CRO
MEASUREMENT OF HIGH CURRENTS
DC
Resistance shunts
Hall generator
MEASUREMENT OF HIGH CURRENTS
HIGH POWER FREQUENCY
AC
• Resistive shunts
• Magnetic potentiometer or probes
• Magnetic links
• Hall generator
• Faraday generator
IMPULSE VOLTAGES AND CURRENTS
• CRO
High ohmic series resistance with micro
ammeters:
Resistance potential dividers
V1=((R1+R2)/R2)V2
Generating voltmeter:
Sphere gap measurements:
• A sparkover voltage of 30 kV (peak) at 1 cm
spacing in air at 2O C and 760 torr pressure
0
TYPES
Series capacitor peak voltmeter
(Chubb-Frotscue method for peak
voltage measurement.)
Digital peak voltmeter.
Peak voltmeter with potential dividers.
SERIES CAPACITOR PEAK VOLTMETER (CHUBB- FROTSCUE
METHOD FOR PEAK VOLTAGE MEASUREMENT.)
DIGITAL PEAK VOLTMETER
PEAK VOLTMETERS WITH POTENTIAL
DIVIDERS
MODIFIED PEAK VOLTMETER
Impulse Voltage Measurements
GENERAL POTENTIAL DIVIDERS
RESISTANCE POTENTIAL DIVIDERS FOR VERY
LOW IMPULSE VOLTAGES
CAPACITANCE VOLTAGE DIVIDERS
Measurement of high direct currents
Resistive shunts:
HALL EFFECT
Measurement of high AC currents
Current transformer with electro optical technique
Measurement of IMPULSE currents
Resistive shunts
Magnetic potentiometers (Rogowski coils
Faraday generator or magneto optic method