PDG-3 Electrical Prevention Systems In A Building Yard Didactic Equipment Electrical Training Panel
This demonstration panel can be used by teachers for their lessons and by students for an easy learning and testing on electrical prevention systems supplying them with the means for verifying the rule of art and the relevant technical standards. Actual electrical devices installed, already connected with each other, enable to check the operation, besides carrying out the measurements of all the electric parameters with conventional instruments. TRAINING PROGRAM: This panel can be used to define the electrical installations ofa building yard (power distribution via TT, TN or IT system) withreference to the following topics: • Main switchboard of power distribution • Department switchboard • Distribution cables laid on the ground and hanging by ropes • Protection of electric cables against mechanical damages inpassage points • Fixed power consuming devices • Transportable power consuming devices • Movable power consuming devices • Portable power consuming devices • Powering the yard via TT, TN or IT system • Protection against direct contacts • Protection against indirect contacts • Earth conductor • Artificial earth plates • Natural earth plates • Equipotential connections Furthermore, this panel can be used to carry out thefollowing testing and measurements by instruments: • Suitability of materials and of equipment • Protection and breaking devices • Identification of neutral and earth conductors • Measurement of earth resistance • Continuity tests of protection conductors • Analyzing the functionality of differential circuit breakers • Measurement of isolation resistance • Checking the protection devices with automatic break • Measurement of fault loop resistance / impedance TECHNICAL SPECIFICATIONS: Framework is made of sheet steel chemically treated andpainted with several coats of epoxy varnish; its base is providedwith rubber feet and it can be positioned on a working top. All the necessary electric components for the correct powersupply of circuits are included in the panel. Main components installed: • 1 three-phase isolation transformer 230-400 V / 230-400 V 500 VA • 1 switch for selecting TT, IT, TN distribution system • 1 simulator of cabinet earthing system with fixed resistance of 0.3 Ω • 2 simulators of earth plate with resistances of 2 Ω, 20 Ω, 200 Ω, 2 kΩ • 1 simulation of extraneous conducting part with resistances of 200 Ω, 1000 Ω, 5000 Ω • 1 four-pole operation switch and differential circuit breaker of 25 A 30 mA “AC” • 1 magnetothermal differential circuit breaker 4 x 1 A “C” / 0.3 A “S” • 1 magnetothermal differential circuit breaker 4 x 1 A “C” / 0.3 A “AC” • 1 magnetothermal circuit breaker 4 x 0.5 A “C • 1 magnetothermal circuit breaker 2 x 0.5 A “C • 1 magnetothermal circuit breaker 1/N 2 A “C • one 1/N breakable fuse holder with fuse of 2 A • 1 SELV transformer of 230/24 V 50 VA • 1 simulator of isolation fault in a power consuming device (to earth) with resistances of 50 kΩ, 15 kΩ, 5 kΩ, 500 Ω and bolted fault Dimensions of demonstration panel: 800 x 600 mm Dimensions of framework: 840 x 450 x 680 mm Net weight: 54 kg Supply with THEORETICAL – EXPERIMENTAL HANDBOOK
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