CODE
GTU102
SPECIFICATIONS
ELECTRICAL POWER ENGINEERING TRAINING LABORATORY
The Electrical Power Engineering Training System must be composed of one work bench , one set of experimental modules and one set of
measuring and testing instruments.
The system must allow performance of at least the following experiments:
Power transmission and distribution
Three phase transformer
Determination of the vector group of the three-phase transformer
Voltage transformation ratio of the transformer
Current transformation ratio
Equivalent circuit quantities on active and reactive power consumed
Measurement of the effect of the load type
Efficiency of the transformer
Analysis of the load capacity of the secondary side
Determination of the influence of a delta stabilizing winding of a transformer
Autotransformer
Overhead line model
Voltages in no-load operation on a overhead line model
Operating capacitance concept
Line model with increased operating capacitance
Current and voltage relationship of an overhead line in matched-load operation.
Current and voltage ratios of a transmission line during a three-phase short-circuit
Current and voltage ratios of a transmission line with mixed R-L and R-C loads
Earth-fault current and the voltage rise of the faulty phases
Techniques to determine the zero-phase sequence impedance of the overhead line model
Series and parallel connection
Voltage distribution in the series and parallel connection of two lines
Voltage distribution in the parallel connection of two lines
Busbar systems
Switching station with two busbars
Busbar transfer with and without interruption
Switching sequence for power circuit breakers
QTY
DL 1013T1
DL 7901TT
DL 1080TT
DL 1017R
Set of experimental modules
Metal casing
Bench-top and/or vertical panel type
Isolated panels for insertion in work frames
Modules must allow connection of an electrical component,
electrical circuit or a test instrument
Modules must clearly display on front side standard diagrams using standard units and symbols.
All electrical connections must be available through safety banana connectors of 2mm for control signals and 4mm for power lines.
The minimum set of power engineering modules should include the following:
THREE-PHASE POWER SUPPLY - Didactic equipment:
three-phase variable power supply, power supply unit for variable 3-phase voltage suitable for supplying ac machines. It must provide an AC output
3-phase from 0 to 380 V, 8 A minimum.
It must be provided with a 16 A, 30 mA differential magneto-thermal main switch, a key operated emergency push-button, start and stop pushbuttons, a motor protection circuit breaker: 6.3 to 10 A, a digital ammeter and a digital switchable voltmeter. 4 mm safety terminals for electrical
connections included.
The output voltage must be set by a rotary knob with 0-100% scale.
Supply voltage:
three-phase from mains.
OVERHEAD LINE MODEL - Didactic equipment:
module with insulated panel, three-phase line model of an overhead power transmission line of 360 km long, voltage 380 kV and current 1000 A,
scale factor: 1:1000. Line resistance: 13 Q, line inductance: 290 mH, mutual capacitance: 1 uF, earth capacitance: 2 (iF, earth resistance: 11 Q, earth
inductance: 250 mH. 4 mm. safety terminal included on the front panel.
THREE-PHASE TRANSORMER - Didactic equipment:
three-phase transformer for feeding a transmission line model, 380 kV with scale factor 1:1000.
Primary: 3 x 380 V with tap at 220 V, star or delta connection.
Secondary: 3 x 220 V windings with taps at +5%, -5%, -10%, -15%,star connection for 3 x 380 V, various star connections possible.
Nominal power: 800 VA minimum.
Tertiary: 3 x 220 V windings, delta connection for stabilizing the third harmonic voltage
components, rated power: 266VA.
4 mm. safety terminal included on the front panel for the electrical connection.
RESISTIVE LOAD - didactic equipment
It must consist in a single or three-phase resistive step-variable load. Housed in a metallic box.
MECHANICAL FEATURES
The load shall be composed of a rugged metal structure and of a front metal panel.
On the front panel all the controls, the protection, the output terminals and a clear synoptic diagram, shall be collected.
ELECTRIC FEATURES
The load shall be composed of resistances, with possibility of star, delta and parallel connection, controlled by three
switches. This item must be provided also with fuses protection.
As a function of the switch positions, there shall be the following phase values:
Position Resistance Max power per phase
1
1050 Ohm
46 W
1
2
1
1
DL 1017L
DL 1017C
2
750 Ohm
65 W
3
435 Ohm
110 W
4
300 Ohm
160 W
5
213 Ohm
230 W
6
150 Ohm
330 W
7
123 Ohm
400 W
Maximum power in single or three phase connection must be 1200 W.
Rated voltage in star connection must be 380 V, in D connection must be 220V, in single-phase must be 220V. 4 mm. safety terminal included on the
front panel for the electrical connection.
INDUCTIVE LOAD - didactic equipment
It must consist of a single or three-phase inductive step-variable load. Housed in a metallic box.
MECHANICAL FEATURES
The load shall be composed of a rugged metal structure and of a front panel.
On the front panel all the controls, the protections, the output terminals and a clear synoptic diagram, shall be collected.
ELECTRICAL FEATURES
The load shall be composed of inductances, with possibility of star, delta and parallel connection, controlled by three switches.
This item must be provided also with fuses protection.
As a function of the switch position there shall be the following phase values.
Position Inductance Max. Power per phase
1
4.46 H
34 VAr
2
3.19 H
48 VAr
3
1.84 H
83 VAr
4
1.27 H
121 VAr
5
0.90 H
171 VAr
6
0.64 H
242 VAr
7
0.52 H
297 VAr
Max reactive power 890 VAr in three-phase or single-phase connection.
Rated voltage in star connection must be 380V, in D connection must be 220V, in single-phase must be 220V. 4 mm. safety terminal included on the
front panel for the electrical connection.
CAPACITIVE LOAD - didactic equipment
It must consist of a single or three-phase capacitive step-variable load. Housed in a metallic box.
MECHANICAL FEATURES
The load shall be composed of a rugged metal structure and on the front panel all the controls, the protections, the output terminals and a clear
synoptic diagram shall be collected. This item must be provided also with fuses protection.
ELECTRICAL FEATURES
The load shall be composed of capacitors, with possibility of star, delta and parallel connection, controlled by three switches.
As a function of the switch position, there shall be the following phase values (at 50Hz):
Position Capacitance Max power per phase
1
2 uF
30 VAR
2
3 uF
45 VAR
3
5 uF
76 VAR
1
1
DL 2108TAL -SW
DL 2108T02
4
8 uF
121 VAR
5
10 uF
152 VAR
6
13 uF
197 VAR
7
18 uF
275 VAR
Max reactive power in single-phase or three-phase connection 825 VAr.
Rated voltage in star connection must be 380V, in D connection must be 220V, in single-phase must be 220V. 4 mm. safety terminal included on the
front panel for the electrical connection.
THREE-PHASE SUPPLY UNIT - Didactic equipment:
Power supply unit for three-phase connection with 4-pole cam mains switch.
25 A current operated earth leakage circuit breaker, sensitivity 30 mA.
Triple-pole motor protection switch: 6.3 to 10 A.
Three-phase indicator lamps.
Output through 5 safety terminals:
L1, L2, L3, N and PE.
Switch for simulation of wind or photovoltaic energy power source
4 mm. safety terminal included on the front panel for the electrical connection.
POWER CIRCUIT BREAKER - Didactic equipment:
Three-phase power circuit breaker with normally closed auxiliary contact.
Features:
Contact load capability: 400 Vac, 3 A
Supply voltage: single-phase from mains
Power circuit:
Insulation voltage: 750V
Thermal current : 20A
Auxiliary contact:
Insulation voltage: 750V.
Rated current: 3A
Auxiliary power:
Single-phase voltage 220V, 50-60Hz
It must be possible to control manually the power breaker switch using the push-buttons “on”and “off” or externally via the switching contact PLC
or RELAY.
This power contacts state shall be indicated by leds:
Green led = open contacts.
Red led = closed contacts.
While at SIGNAL OUTPUT terminals will be available a TTL level:
Low level ( 0V )= open contacts.
High level ( 5V )= closed contacts.
The RS flip-flop state shall be indicated by a led:
Yellow led = set flip-flop.
4 mm. safety terminal and 2 mm. terminals included on the front panel for the electrical connection.
It must be supplied with manual in English language
1
4
DL 2108T02/2
DL 2108T02/4
DL 2108T03
DL 2108T04
DOUBLE BUSBAR WITH TWO DISCONNECTORS - Didactic equipment:
module with insulated panel
Suitable for extending the double busbar system.
The module must have insulated front panel and four light push buttons (two red and two green).
Each busbar must have a supply branch that will be connected or disconnected by using a disconnector.
It must be possible to control manually the power breaker switch using two couples of push-buttons “on”and “off” or externally via the switching
contact PLC or RELAY.
This power contacts state shall be indicated by leds:
Green led = open contacts.
Red led = closed contacts.
While at SIGNAL OUTPUT terminals will be available a TTL level:
Low level ( 0V )= open contacts.
High level ( 5V )= closed contacts.
The RS flip-flop state shall be indicated by a led:
Yellow led = set flip-flop.
4 mm. safety terminal and 2 mm. terminals included on the front panel for the electrical connection.
It must be supplied with manual in English language
DOUBLE BUSBAR WITH FOUR DISCONNECTORS Didactic equipment:
module with insulated panel
Suitable for extending the double busbar system.
The module must have insulated front panel and eight light push buttons (four red and four green).
Each busbar must have a supply branch that will be connected or disconnected by using a disconnector.
It must be possible to control manually the power breaker switch using four couples of push-buttons “on”and “off” or externally via the switching
contact PLC or RELAY.
This power contacts state shall be indicated by leds:
Green led = open contacts.
Red led = closed contacts.
While at SIGNAL OUTPUT terminals will be available a TTL level:
Low level ( 0V )= open contacts.
High level ( 5V )= closed contacts.
The RS flip-flop state shall be indicated by a led:
Yellow led = set flip-flop.
4 mm. safety terminal and 2 mm. terminals included on the front panel for the electrical connection.
It must be supplied with manual in English language
LINE CAPACITOR - Didactic equipment:
module with insulated panel, three-phase transmission line capacitor with exactly half of the operating capacitance of the 380 kV transmission line
model with a length of 360 km, Capacitance:3 x 2.5 uF, 450 Vac. 4 mm. safety terminal included on the front panel for the electrical connection.
PETERSEN COIL - Didactic equipment:
module with insulated panel, Petersen coil,
inductance with 20 taps for earth fault compensation in transmission lines:
2000mH-1800mH-1600mH-1400mH-1250mH-1100mH-980mH-860mH-750mH-620mH-500mH-400mH-300mH-220mH-160mH-120mH-80mH-
1
1
2
1
DL 2109T1A
DL 2109T2A5
DL 2109T1PV
DL 2109T3PV
DL 2109T26
40mH-20mH-5mH-0.
• Inductance: 0.005 ... 2 H
• Rated voltage: 220 V
• Rated current: 0.5 A
4 mm. safety terminal included on the front panel for the electrical connection.
MOVING COIL AMMETER MODULE - didactic equipment
The module must consist of a magneto-electric meter for ac and dc measurements.
Scale: 50 divisions - the scale shall made open and reasonably uniform down to about 20 percent of the full-scale reading.
Range: 100, 500 and 1000 mA, ac/dc
Accuracy class: 1.5
This module must have insulated front panel , 4 mm safety terminals, one selector and one analog meter.
The module must be supplied with manual in English language.
MOVING COIL AMMETER MODULE - didactic equipment
This module must be suitable for ac and dc current measurements.
Technical features:
•Scale: 50 divisions - the scale shall made open and reasonably uniform down to about 20 percent of the full-scale reading.
•Range: 2.5 A - 1.25 A
•Accuracy class: 1.5
•AC/DC measurements
This module must have insulated front panel, 4 mm. safety terminals, one selector and one analog meter.
The module must be supplied with manual in English language.
MOVING IRON VOLTMETER MODULE - didactic equipment
This module must be suitable for ac and dc voltage measurements.
Technical features:
Scale: 30 divisions - the scale shall be made open and reasonably uniform down to about 20% of the full-scale reading.
Range: 600 V
Accuracy class: 1.5
This module must have insulated front panel with the electrical scheme, 4 mm safety terminals, fuse protection and one analog meter.
The module must be supplied with manual in English language.
MOVING IRON VOLTMETER MODULE - didactic equipment
This module must be suitable for ac and dc voltage measurements.
Technical features:
•Scale: 50 divisions - the scale shall be made open and reasonably uniform down to about 20% of the full-scale reading.
•Range: 125-250-500 V
•Range changeover switch
•Accuracy class: 1.5
This module must have insulated front panel with the electrical scheme, 4 mm safety terminals, fuse protection and one analog meter. One selector
shall be included in this panel.
The module must be supplied with manual in English language.
POWER METER - Didactic equipment :
This module must consist in a demonstration single-phase meter for active power and capacitive/inductive reactive power.
1
3
2
3
2
DL 2109T27
DL 2100T2
DL 2100TA
DL 1155GTU
Technical features:
Measurement ranges: Voltage: 3/10/30/100/300/1000 V
Current: 0.1/0.3/1/3/10/30 A
Frequency range: Active power: 0 ... 20 kHz
Reactive power: 50 Hz
LED indicators: capacitive reactive power, inductive reactive power, overload voltage (with acoustic sound), overload current (with acoustic sound).
Auxiliary supply: single-phase from mains
This module must have insulated type front panel with the electrical scheme and also 4 mm safety terminals. Two selectors, one switch and one
push-button shall be included in this panel.
POWER FACTOR METER - Didactic equipment:
The module must consist of one single-phase power factor meter with measurement of the power factor and phase-angle with ranges: power
factor: 0 cap to 1 to 0 ind, phase-angle: -90°cap to 0 ... +90°ind.
Measurement ranges:
voltage 3 / 10 / 30 / 100 / 300 / 1000V
Current 0.1 / 0.3 / 1 / 3 / 10 / 30A
Frequency range:
active power 0…20 kHz
reactive power 50Hz
Led indicators:
capacitive reactive power
inductive reactive power
overload voltage, with acoustic sound
overload current, with acoustic sound
Auxiliary supply: 220V, 50-60Hz
4 mm safety terminals for electrical connections included.
It must be supplied with manual in English language.
TWO LEVEL FRAME WITH TABLE
Metal frame for fitting the modules of the laboratory.
Mounted on a bilaminated wooden top of a table.
Metal square legs with compensating feet which can be adjusted to offset
the uneveness of the floor.
STORAGE CABINET
Fire varnished steel-plate, provided with shelves for module storage and key-locked doors.
Supplied with 4 rubber casters, the cabinet should be fitted under the experimental table
A set of cables with at least 80 connecting leads with security plugs of different colours, length and sections.
1
1
1
1