Lab#06
Introduction to the High Voltage Lab Equipment
OBJECTIVE:
1. Introduction to the high voltage lab.
2. Familiarization with technical equipment.
3. Introduction to the operations of high voltage lab
DISCUSSION:
A high voltage lab is a specialized facility equipped for experiments involving high
levels of electrical voltage. This controlled environment is designed to handle voltages far
exceeding typical household or industrial levels, often ranging from thousands to millions of
volts. High voltage labs are essential for researching and testing electrical insulation materials,
developing high voltage equipment, and evaluating the behavior of electrical systems under
extreme conditions. These labs provide a safe and controlled space where scientists, engineers,
and researchers can gain valuable insights into the behavior of electricity at elevated voltages,
ensuring the reliability and safety of electrical systems in various industries, including energy
production, transmission, and distribution.
LAB TASKS
Task#01
Discussion on all equipment in high voltage lab.
Test transformer:
A high voltage transformer test transformer, is a specialized electrical device designed for
generating and supplying extremely high voltage levels for testing and evaluating the
performance and safety of electrical equipment and insulation systems. These transformers are
typically used in laboratories, research facilities, and industries involved in electricity
generation, transmission, and distribution.
Capacitor 220 KV:
A 220 kV capacitor refers to a high-voltage capacitor with a rated voltage of 220,000 volts (220
kV). Capacitors are electronic components designed to store and release electrical energy in the
form of an electric field. They are commonly used in various electrical and electronic
applications, including power systems and electrical grids.
Sphere Gap:
A sphere gap is a specific type of electrical discharge gap used in high voltage laboratories and
testing facilities. It consists of two spherical electrodes, typically metal spheres or hemispheres,
placed in close proximity to each other. Sphere gaps are employed for several important
purposes in high voltage labs
Vessel for vacuum and pressure:
In a high voltage (HV) laboratory, there is often a need for vessels that can handle both vacuum and
pressure conditions. These vessels are used for various purposes, including testing, research, and
experiments involving high voltage equipment.
Discharging rod:
A discharging rod in a high voltage (HV) laboratory is a specialized tool used to safely discharge residual
electrical energy from equipment or components after high voltage testing. It typically consists of a
long, insulated rod with a grounding electrode or point at its tip. By carefully grounding charged objects
using a discharging rod, technicians and engineers can prevent electrical shocks and equipment damage,
ensuring a safe environment for maintenance and testing in the HV lab.
Top Shielding Ring:
A top shielding ring in a high voltage (HV) lab is a critical component used to control and distribute
electric field lines in electrical equipment. Typically made of a conductive material, such as aluminum or
copper, it is positioned at the top of HV apparatus, such as transformers or insulators. The top shielding
ring helps mitigate the risk of electrical breakdown by equalizing the electric field distribution, reducing
the potential for corona discharge, and enhancing the overall insulation performance of the equipment,
thereby ensuring safe and reliable HV operations.
Connecting Cup:
In a high voltage (HV) laboratory, a connecting cup refers to a specialized component or fixture designed
for securely connecting and conducting high voltage cables or components. These connecting cups are
engineered to withstand the extreme electrical stresses and voltages typically encountered in HV testing
environments. They play a crucial role in ensuring reliable electrical connections during experiments,
tests, and measurements, helping to prevent electrical arcing, discharges, and other potential hazards
associated with high voltage equipment. Proper design, materials, and insulation are essential for
connecting cups in HV labs to maintain safety and accuracy during high voltage testing procedures.
Sphere, Plane and Pin Insulator:
The operation of a sphere, plane and pin insulator is straightforward when a high voltage is applied
across the gap, an electrical discharge (spark) occurs between the spheres when the voltage reaches a
critical level. This sparkover voltage is used as a reference point for voltage measurement and
calibration. Sphere gaps are designed to be precise, reliable, and reproducible, making them valuable
tools in HV laboratories for ensuring accurate voltage measurements and assessing the performance of
insulating materials and electrical components.
Isolation Rod:
An isolation rod in a high voltage (HV) laboratory is a specialized tool designed to provide a safe means
of isolating and insulating electrical components or conductors during testing or maintenance
procedures involving high voltage equipment. These rods are typically made of insulating materials,
such as fiberglass or epoxy, and are equipped with appropriate end fittings or clamps for handling and
securing electrical connections.
high voltage resistor:
A charging resistor in a high voltage (HV) laboratory is a specialized component used to limit
the rate at which electrical energy is transferred into a system when charging capacitors or other
energy storage devices. It plays a crucial role in controlling the voltage rise and protecting
equipment during high voltage testing and experiments
Capacitor of 1200pF:
This capacitor is used during patching of circuit during the experiment.
Learning Outcomes