whatsapp: 0086-18615575385
whatsapp: 0086-13668821631

Double Bus Bar System Educational Equipment Electrical Training Panel

Item No.: DBB-2E
DBB-2E Double Bus Bar System Educational Equipment Electrical Training Panel
Description
DBB-2E Double Bus Bar System Educational Equipment Electrical Training Panel

The vectorial field-oriented control servomechanism for asynchronous three-phase motor enables the student to learn, demonstrate and experiment the main concepts of field oriented control.
TRAINING PROGRAM:
• Asynchronous three-phase motor: electrical and mechanical characteristics;
• Vectorial field-oriented control (F.O.C.);
• Speed and torque control;
• Analysis of the IGBT three-phase inverter;
• “Space vector” vectorial modulation;
• Voltage/current wTransmission and distribution of electric power is usually carried out over high-voltage (HV) and medium-voltage (MV) lines.
TRAINING PROGRAM:
• Electric generation: three-phase alternators and prime movers, safety devices for alternators (specific protection relays), parallel of alternators: devices and conditions of
parallel connection.
• Double Bus Bar circuit: MAIN line and AUXILIARY line.
• Multifunction instruments: functions, programming and use.
• Power transmission lines: study of HV transmission lines (featuring concentrated parameters), voltage drop versus section and length of conductors. Types of power lines: copper, aluminum. Power lines in series and in parallel.
• PLC: programming languages and structure, digital inputs and outputs and corresponding links with the fi eld. Application of the software for developing programs via a PC. The DBB-2E program as a case of study.
• Protection relays: study of 3 different protection relays (included in the panel): function of relays, main action, parameters to be set, connections with the system.
• Automatic sequence to guarantee continuity of service: starting, connection and parallel of auxiliary M-G sets.
• Power Factor Correction (Optional)

TECHNICAL CHARACTERISTICS:
GENERAL CHARACTERISTICS
• Vertical tabletop metal panel, with solid framework of painted sheet steel, anti-tip legs with anti-slip rubber feet. Front panel silkscreen printed with the system layout marked with international symbols
• All terminals are 4 mm safety plugs.
• Indicator lamps for the operational states of the system.
The panel includes the following components:
THREE-PHASE HIGH-VOLTAGE LINES
Two three-phase lines of high voltage (exceeding 20 kV) for power transmission; these lines are simulated by model “ϖ” with concentrated parameters. Both lines can be used
separately, connected in parallel, or in series. Power supply: 3 x 400 V (max.).
Line 1: the variable parameter is the section of cables and consequently the transmitted power capacity:
• Simulated distance: 50 km
• Transmitted power (MVA): 10-15-20, simulated by concentrated parameters
• Equivalent parameters: resistance: 18-25-35 Ω; inductance: 72 mH; distributed capacitance: 2 x 0.2 µF
• Circuit breakers at line beginning and end
• Protection by fuses
Line 2: the variable parameter is the distance (km):
• Length that can be selected among 25 -50 and 100 km
• Simulated voltage: 120 kV
• Transmitted power: 20 MVA
• Equivalent parameters: resistance: 9-25-35 Ω; inductance: 144 - 72 - 36 mH; distributed capacitance: 2 x 0.1 - 0.2 - 0.4 µF
• Circuit breakers at line beginning and end
• Protection by fuses.
SIGNALLING, PROTECTION AND CONTROL ELEMENTS
• 4 industrial contactors, with four NO power contacts. Auxiliary contacts: 1 NO + 1 NC. Coil: 24 Vdc.
• Four START/STOP buttons and indicator lamp
• EMERGENCY button
• 3-position selector for the operating modes
• 1 automatic thermo-magnetic 4-pole switch, 10 A, C curve, equipped with releasing remote coil (via emergency button)
• Voltage pilot lamps
• Power supply of power circuits: 3 x 400 V/N/PE - 10 A
• Power supply of control circuits: 24 Vdc - 2 A max.
PLC SYSTEM
• PLC by Siemens
• Power supply unit of 24 Vdc - 2 A, with electronic protection against overloads and short-circuits for the control of digital inputs and outputs
• 14 digital inputs: six of these inputs are used for the quick count
• 10 digital outputs of 24 Vdc with transistors
• RS-485 interface and adapter with USB cable for programming
• LED for the state of inputs and outputs
PROTECTION RELAYS
This system is provided with the three relays described here below:
• Overcurrent relay (protection functions 50/51): electronic three-phase maximum-current / short-circuit, adjustment range 1-5 / 5-25 A ac.
• N.2 MAX/MIN voltage relay (protection functions 27/59): electronic three-phase/N, voltage Ue selectable among 380- 400-415 Vac; adjustment range +10% / -15% Ue.
• N. 2 PHASE SEQUENCE AND ASYMMETRY RELAY (protection functions 47/60): electronic device, 400 Vac, asymmetry selectable in the range: 5-15%.
MULTI-FUNCTION AC INSTRUMENTS
N. 3 microprocessor-controlled multi-function instruments for power analysis. These three instruments have separate terminals for safety leads of 4 mm, for a totally free use.
• for measurements on balanced / unbalanced 3-ph systems, with or without Neutral, or of single-ph systems;
• these instruments enable to measure more than 300 parameters such as voltages and currents (in TRMS), active, reactive and apparent power, power factor, frequency, analysis up to the 31st harmonic of V and I, besides the total / partial active power, total / partial reactive power. Accuracy class of the instrument for V and I: 0.2%. Current up to 10 A (with internal CT 10/5) - max. phase-to-phase voltage of 830 V - 45…66 Hz.
• Auxiliary power supply: 110…240 Vac - 50-60 Hz
• Liquid-Crystal Display (LCD), 128 x 80 pixels with 4 grey levels
• With 4 pushbuttons to display and set measurement pages
• Four programmable pages among the most frequently used parameters (selectable among the measurement units).
Accessories supplied
• software for the configuration of the data detected by the instruments, setting the measures and the sampling time, graphic display of data versus time.
Overall dimensions of the panel: 1320 x 820 x 660 mm
Weight: 74 kg
Supply with 
THEORETICAL – EXPERIMENTAL HANDBOOK