NTC-08.09 “Electric Devices”

The training laboratory system is designed to be used as a teaching facility for practical laboratory tests on the course “Electric Devices”.

 

Category:
The training laboratory system is designed to be used as a teaching facility for practical laboratory tests on the course “Electric Devices”.

Structurally, the training system consists of the case with installed part of electric equipment, electric plates, perforated front panel, tabletop of integrated desktop.

Electric schematics of power supply sources with measurement equipment are displayed on the front panel. The panel includes switch sockets, digital equipment board, stopwatch indicator, switch gear apparatus, adjustment knob of LATR output voltage and receptacle for fuses links installation with a zoom lens, fixed above it. The lens is used for convenience of detailed observation of the burning process of fuse link.

Plug-in modules are located on the perforated mounting panel.

1. Module with relay-contactor equipment:

  • magnetic switch of KMI-110 type, ~220 V;
  • magnetic switch of KMI-210 type,~220 V;
  • intermediate relay of HJQ-22 type, ~220 V.

2. Module with protective equipment:

  • electric time relay PR-617;
  • thermal реле ТRN-10, 1А;
  • automatic breaker VA, 1А.

3. Module with electric equipment:

  • thyristor voltage regulator with test sockets of control signals and switch sockets of power circuit;
  • solid-state relay.

Maximum current relay RТ-40 with switch panel.

The case consists of:

  • power supply unit +5 V (1 А current);
  • stopwatch circuit board with measuring range 0,01 – 99,99 sec;
  • circuit board of digital measuring equipment with current relay;
  • reducing transformer single-phase dry-type multipurpose transformer OSM 1-0,1 220/42 V;
  • permanent wire, load resistors PVR-5 22 Ohm;
  • LATR autotransformer, 0,4 kW;
  • rectifier of LATR regulated voltage;
  • power supply transformer single-phase dry-type multipurpose transformer OSM 1-0,1.

The controls:

  • breaker of laboratory LATR;
  • potentiometer to regulate leakage current of RCCB;
  • operating modes switches of digital measuring equipment;
  • stopwatch reset button.

To conduct laboratory experiments it’s necessary to assemble electric schematic of investigated object, using jumpers.

The training system is supplied with:

  • a software to test and pass students before the experiment. Both theoretical knowledge and knowledge of the contents of the laboratory work are checked. As a result of testing the student receives the mark;

  • a set of methodical and technical documentation for teaching staff.

 

 

Experiments provided

  1. The study of safety fuses. The investigated object: low-voltage fuse links of VP2 type. Students familiarize with the construction and technical characteristics of low-voltage fuses. It’s necessary to measure time-current characteristic of the fuse link, compare it with counting characteristic and to study the impact of metallurgical effect.
  2. The study of direct and alternating current contactors. The investigated object: contact switch equipment. Students familiarize with technical characteristics, construction, contactor and magnetic starters operation.
  3. The study of electromagnetic time relay. The investigated object: construction and operating principle of electric current relay.  Familiarization with the ways of current relay configuration on current and time-delay setpoint, current value impact on relay actuation time.
  4. The study of automatic switch. The investigated object: low-voltage single-pole automatic breaker. Studying the hardware, construction and operating principle of automatic breakers, using in power supply systems and electric drives.
  5. The study of current-overload relay. The investigated object: TRN-10 relay. Students familiarize with the construction of thermal relay. Studying the operating principle. The experiments are conducted in measuring of time-current characteristic of thermal relay.
  6. The study of thermal relay. The investigated object: single-phase thyristor voltage regulator. Studying the operating principle of thyristor voltage regulators. The control schematic of thyristor voltage regulator and its specifications as electric equipment are investigated.
  7. The study of thyristor voltage regulator. The investigated object: familiarization with technical characteristics, construction and solid-state relay operation.

Technical specifications

Power supply ~220V, 50Hz
Power consumption, Watt less than 300
Stand overall dimensions:
  Width, mm 1310
  Height, mm 1460
  Depth, mm 600
Weight, kg 80

Scope of delivery

  • training laboratory system – 1 pc.;
  • plug-in module with relay-contactor equipment – 1 pc.;
  • plug-in module with safety equipment – 1 pc.;
  • plug-in module with electric equipment – 1 pc.;
  • passport – 1 pc.;
  • CD with supplemental documentation – 1 pc.;
  • jumpers set – 1 pc.

Necessary additional equipment