11 — Electrical & Electronics
Schering Bridge
Schering bridge for measuring capacitance, dissipation factor and the loss angle of insulating materials and cables. Used in high-voltage and dielectric-testing practicals.
01 — Same Laboratory
More in Electrical & Electronic Measurements
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063
Three Phase Power Factor Meter
An analog instrument that indicates the power factor of a three-phase AC circuit, used in power-systems and machines laboratories to study load power factor.
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064
Wattmeter (Range Set, LPF & UPF)
A set of low and unity power-factor wattmeters spanning current ranges of 0.5-1 A to 10-20 A and voltage ranges of 150-600 V, used to measure real power in AC circuits with varying load power factors.
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065
PMMC Instrument Trainer
Sectioned permanent-magnet moving-coil instrument with exposed movement, control spring and damping system for studying construction, torque equation, shunts and multipliers. Includes a calibration exercise against a standard meter.
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066
Moving Iron Instrument Trainer
Cut-away moving-iron instrument — attraction and repulsion types — for studying construction, scale characteristics and the AC/DC response of the movement. Used alongside the PMMC trainer to compare instrument families.
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067
Electrodynamometer Instrument Trainer
Electrodynamometer movement mounted for study of its current, pressure and moving coils and its use as a wattmeter or transfer instrument. Demonstrates why the movement reads true power on both AC and DC.
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068
Energy Meter Testing Kit
Test set-up with standard meter, phantom loading and timing arrangement for calibrating single-phase energy meters and determining percentage error and creep. Covers the meter-testing experiment of the measurements syllabus.
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069
Wattmeter Testing Kit
Bench arrangement for calibrating dynamometer and digital wattmeters against a standard at varying power factor. Demonstrates pressure-coil connection, compensation and error determination.
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070
Maxwell Bridge
Maxwell inductance-capacitance bridge for measuring the inductance and quality factor of medium-Q coils. Supplied with detector, standard arms and null-balance indication for the AC bridge practical.
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072
Anderson Bridge
Modified Maxwell bridge for accurate measurement of low-Q inductance in terms of a standard capacitor and resistance. Included in the AC-bridge set of the electrical measurements laboratory.
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073
Universal Bridge (LCR Measurement)
Single instrument combining the standard AC and DC bridge configurations for measuring resistance, inductance, capacitance, dissipation factor and quality factor. Replaces several individual bridges where bench space is limited.
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074
Digital Frequency Counter
Precision counter measuring frequency, period, ratio and totalised counts over a wide input range with a crystal time-base. Used for oscillator, signal-generator and timing measurements.
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075
Digital Power Analyzer
Multi-channel analyser measuring voltage, current, active/reactive/apparent power, power factor, energy and efficiency in single- and three-phase circuits. Used for machine efficiency tests and drive input-output measurement.
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