The training laboratory system is designed for the study of two main systems of electrical safety:
- protective grounding:
- neutral grounding together with protecting cutout devices.
Structurally, the system consists of the body in which electric equipment is mounted, front panel and desktop of integrated table.
The panels of the stand contain the circuits of electrical safety devices and electrical subsystem of the stand, measuring and information system, control system.
The training system feeding system is of two types: three-phase with dead-grounded neutral and three-phase with insulated neutral. The study of electrical safety systems is done at shorting of a phase wire to frame (mass) of electricity consumer. The physical model of a man is in contact with electricity consumer body.
The system allows the possibility of changing the electrical resistances of grounding mat, dead-grounded and insulated neutral and human model. It allows to study the influence of the abovementioned parameters on current passing through physical human model, determine voltage at electricity consumer frame, estimate short circuit current at actuation of neutral grounding together with protecting cutout devices.
Lowered voltage is used for insuring the experiment safety while electricity consumers and physical human model are protected by special transparent cover. The measured values (voltage, currents) are digitally displayed. The stand contains devices allowing to measure the resistance of conductors and insulation as well as the resistance of protective grounding.
Software and user’s manual are supplied with the laboratory stand: a complete set of methodical and technical documents for teaching staff.