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Electrical Lab Machine

Relay Testing Trainer
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Relay Testing Trainer
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Facility of Relay testing. • Earth fault relay Electromechanical & Numerical / Micro processor based • Over current relay Electromechanical & Numerical / Micro processor based • Under voltage relay Electromechanical & Numerical / Micro processor based • Over voltage relay Electromechanical & Numerical / Micro processor based • Reverse power relay • On delay timer • Off Delay timer • Directional Over current relay • Differential Transformer protection relay • Motor/ feeder protection relay • Distance protection relay
Microprocessor Based Earth Fault Relay Setup
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Microprocessor Based Earth Fault Relay Setup
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A non-directional heavily damped induction disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. The relay disc is so shaped that as it rotates the driving torque increases and offsets the changing restraining torque of the control spring. This feature combined with the high torque of the relay ensures good contact pressure even at currents near pick-up. Damping of the disc movement is by removable high retentively permanent magnet. The unique method of winding the operating coil ensures that the time / current characteristics are identical on each of the seven current taps. Selection of the required current setting is by means of a plug setting bridge which has a single insulated plug. The maximum current tap is automatically connected when the plug is withdrawn from the bridge, allowing the setting to be changed under load without risk of open circuiting the current transformers. The IDMT relay has an auxiliary unit which is powered by a secondary winding on the electromagnet through a rectifier and as such a separate auxiliary supply is not required. The disc unit operates and closes its contacts, the auxiliary element connected across the secondary winding on the electromagnet operates, one normally open contact of the auxiliary element reinforces the disc contact. Two other contacts of the auxiliary element are brought out to the terminals of the relay. The relay operating time can be adjusted by movement of the disc backstop which is controlled by rotating a knurled moulded disc at the base of the graduated time multiplier scale.
Integrated Microprocessor Based Digital Relay
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Integrated Microprocessor Based Digital Relay
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A non-directional heavily damped induction disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. The relay disc is so shaped that as it rotates the driving torque increases and offsets the changing restraining torque of the control spring. This feature combined with the high torque of the relay ensures good contact pressure even at currents near pick-up. Damping of the disc movement is by removable high retentively permanent magnet. The unique method of winding the operating coil ensures that the time / current characteristics are identical on each of the seven current taps. Selection of the required current setting is by means of a plug setting bridge which has a single insulated plug. The maximum current tap is automatically connected when the plug is withdrawn from the bridge, allowing the setting to be changed under load without risk of open circuiting the current transformers. The IDMT relay has an auxiliary unit which is powered by a secondary winding on the electromagnet through a rectifier and as such a separate auxiliary supply is not required. The disc unit operates and closes its contacts, the auxiliary element connected across the secondary winding on the electromagnet operates, one normally open contact of the auxiliary element reinforces the disc contact. Two other contacts of the auxiliary element are brought out to the terminals of the relay. The relay operating time can be adjusted by movement of the disc backstop which is controlled by rotating a knurled moulded disc at the base of the graduated time multiplier scale.
Integrated Single Phase Distance Relay
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Integrated Single Phase Distance Relay
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A non-directional heavily damped induction disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. The relay disc is so shaped that as it rotates the driving torque increases and offsets the changing restraining torque of the control spring. This feature combined with the high torque of the relay ensures good contact pressure even at currents near pick-up. Damping of the disc movement is by removable high retentively permanent magnet. The unique method of winding the operating coil ensures that the time / current characteristics are identical on each of the seven current taps. Selection of the required current setting is by means of a plug setting bridge which has a single insulated plug. The maximum current tap is automatically connected when the plug is withdrawn from the bridge, allowing the setting to be changed under load without risk of open circuiting the current transformers. The IDMT relay has an auxiliary unit which is powered by a secondary winding on the electromagnet through a rectifier and as such a separate auxiliary supply is not required. The disc unit operates and closes its contacts, the auxiliary element connected across the secondary winding on the electromagnet operates, one normally open contact of the auxiliary element reinforces the disc contact. Two other contacts of the auxiliary element are brought out to the terminals of the relay. The relay operating time can be adjusted by movement of the disc backstop which is controlled by rotating a knurled moulded disc at the base of the graduated time multiplier scale.
ON and OFF Timer Delay Relay
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ON and OFF Timer Delay Relay
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(1) Single phase AC input supply panel will consist of : a) 1 phase/2 pole MCB of 10/15A – 1 Nos, b) Bulb load . (2) Separate Power and control Contact Unit:- a) With separate input output and coil terminals bought out on the panel board (3) Panel will consist of : a) Counter Timer b) Separate auxillary supplies for coil contacts of relay (4) 230/220 VAC, 1KVA, Isolation Transformer Panel will consist of : Transformer Panel Consists of all the connections of transformer primary and secondary will be brought on the top of panel. (5)ON OFF Timer Delay Relay alonwigth Protection relay type (Numeric) should consists of : Numeric type transformer differential relay, current rating 1A, with biased setting of 0 to 100% in step of 5%, Aux. supply 220VAC OR Time Delay relay trainer kit with – On Time / Off Time Delay Relay ( VTT ALSTOM/AREVA make) • OR STANDARD MAKE Aux. DC voltage source for Relay :220V Digital time counter with hold and reset facility With required power supply, DP MCB, indicator, connecting terminals Sockets, Air break contact with 3 no, NO for power ckt and 1no NO and 1no NC for control ckt, operating manuals etc
Transformer Differential Relay Setup
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Transformer Differential Relay Setup
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A non-directional heavily damped induc¬tion disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. The relay disc is so shaped that as it rotates the driving torque increases and offsets the changing restraining torque of the control spring. This feature combined with the high torque of the relay ensures good contact pressure even at currents near pick-up. Damping of the disc movement is by removable high retentively permanent magnet. The unique method of winding the oper¬ating coil ensures that the time / current characteristics are identical on each of the seven current taps. Selection of the re¬quired current setting is by means of a plug setting bridge which has a single insulated plug. The maximum current tap is auto¬matically connected when the plug is with¬drawn from the bridge, allowing the set¬ting to be changed under load without risk of open circuiting the current transformers.
Feeder Protection Relay Setup
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Feeder Protection Relay Setup
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The Panel will consist of :- • Control panel for ‘MICOM Relay’ consisting of : • MICOM P220 Static Relay (AREVA make) – 1 no. • OR STANDARD MAKE • Digital AC Voltmeter for input supply – 1 no. • Digital AC Ammeters – 3 nos. • Digital DC Voltmeter for relay aux. supply – 1 no. • Core balance CT – 1 set. • Individual CT for motor. • Potential transformer for relay. • Power contractor for motor power supply – 1 set. • Auxiliary contractor – 6 sets. • Different motor fault creator option (i.e. Earth fault, Un-balance load, Temperature rise, over current, block rotor, stalling etc). • Single Phase current injector : 0-20A with Digital Ammeter for relay testing purpose – 1 set • Auxiliary variable DC power supply (0 – 220V/2A) • Three-Phase Sq. Cage Induction motor (3 HP, 440V) with mechanical loading arrangement. • Self stand foot mounted power coated MS panel with required connecting terminals, starter, • Mob’s, toggle switches, cables, operating manuals etc. • Self stand foot mounted power coated MS panel with required connecting terminals, starter, • Toggle switches, cables. • Automatic/Manual tripping circuit with all necessary protection. NOTE: AS PER CUSTOMERS REQUIREMENT WE ALREADY SUPPLIED SUCH KIND OF EXPERIMENTALS CONTROL PANEL. EXCEPT THAT WE ALSO PROVIDE CUSTOMIZED AND TAILOR MADE ITEMS.
Inverse Type Under Voltage Relay
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Inverse Type Under Voltage Relay
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Under voltage is a protective relay normally used in industries for protection of devices when the voltage falls below a certain set value. The relay has a provision to set a threshold voltage and when the voltage falls below this value it trips thereby protecting the system consisting of :- (1) Input 3 phase DOL Starter panel : 4 pole MCB of 415 V/1A, DOL 9A Contactor with 230V / 50 Hz / 11VA COIL, Bimetallic thermal O/L relay with range 1.4A – 2.3A . (2) Bi-directional 3 phase AC measurement panel Digital meter (96X96) mm should able to measure following 3Φ & 1Φ parameters, Voltage-line to line & line to neutral, current: for all 3Φ upto 5A, Power factor (0.2 lag-unity–0.2 lead), Frequency, watt, VAR, VA and energy in KWhrs. (3) FWD-OFF-REV panel will have: FWD/REV, 3 pole 3 way switch with centre OFF, 6A/440V. (4) 3-phase Dimmer panel Table top 3Φ phase dimmer panel should be provided with rating of 415VAC/1A (5) Single Phasing panel Consists of three single-phase (SP) fault switches (DPST) one for each phase. Three numbers of bulbs (15W) internally Star connected to indicate SP fault. (6) Phase sequence indicator and study Expt. Panel will consists of : (1) Study 3 phase 440V Electric utility supply, (2) Determination of over voltage, under voltage, single phasing & reverse phasing / Displays OV, UV, SP, RP on digital display, (3) 9 V Battery / +12V Supply operated. (7) Protective relay panel will consists of : Microprocessor based numerical relay with following specs: (1) Over/Under voltage protection, (2) Single phase protection, (3) Reverse phase protection. All the connections of relay should brought out on shrouded socket for easy connection
Study Of Synchronous Motor
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Study Of Synchronous Motor
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1) SYNCHRONOUS MOTOR DETAILS :- • 1HP/ 3 phase/ 440V /1500 RPM / 50 Hz • Horizontal foot mounted • Class F Insulation • Screen protected drip proof (SPDP) • IP-22 Protection • Self-Fan cooled • Continues rated 2) PANEL DETAILS :- • SYNCHRONOUS MOTOR Power – 1 HPA Voltage – 440V Rpm - 1500 • Digital/ Analog AC Voltmeter three phase (With volt selector switch) Make : Cabs/AE…..Range : 0-500V ……..Quantity :1 • Digital/ Analog AC Ammeter Make : Cabs/AE……Range : 0- 10A………Quantity :1 • Digital/ Analog DC Voltmeter Make : Cabs/AE……Range : 0-300V………Quantity :1 • Digital/ Analog DC Ammeter Make : Cabs/AE……Range : 0-2A………Quantity :1 • DOL STARTER • Separate field excitation for the synchronous machine. • Main ON-OFF switch • Toggle switch • LED indicator • All equipments /Instruments fitted on a Bakelite panel board with table top self stand. • MS angle Frame with required connecting terminals , patch cords, • Mains cords, instruction /operating Manual etc
R-L-C Measurement Setup
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R-L-C Measurement Setup
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1) PANEL DETAILS :- • Digital/ Analog AC Voltmeter Make : Cabs/AE…..Range : 0-300V ……..Quantity :3 • Digital/ Analog AC Ammeter Make : Cabs/AE……Range : 0- 10A………Quantity :3 • Digital wattmeter Make : Cabs…… ………Quantity : 1 • Digital power factor meter Make : Cabs…… ………Quantity : 1 • Main ON-OFF switch • Load switch with suitable loading arrangement.(Resistive , inductive and capacitive) • LED indicator All necessary protections (overload , short circuit etc ) are being provided
Circuit Breaker Trainer
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Circuit Breaker Trainer
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TOTAL SET UP CONSISTING OF :- Low Voltage Air circuit breaker(ACB) 630 A capacity: Rated current(In)-630A(Adjustable current rating) general use-200A
PLC Trainer
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PLC Trainer
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A Programmable Logic Controller, PLC or Programmable Controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or light fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory. PLC programs are typically written in a special application on a personal computer, then downloaded by a direct-connection cable or over a network to the PLC. The program is stored in the PLC either in battery-backed-up RAM or some other non-volatile flash memory. Often, a single PLC can be programmed to replace thousands of relays.
Parallel Operation Of Two Alternators
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Parallel Operation Of Two Alternators
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The operation of connecting an alternator in parallel with another alternator or with common Bus-Bars is known as synchronizing. Generally, in power transmission & distribution many alternators operate parallel in synchronization with the bus bars. Thus, the alternators remain connected to a live system of constant voltage & frequency. It is never advisable to connect a stationary alternator to live bus-bars, because stator induced e.m.f being zero, a short circuit will result. For proper synchronizing of alternators, the following three conditions must be satisfied – a) The terminal voltage of the incoming alternator must be the same as bus-bar voltage. This can be indicated by a volt meter (V). b) The speed of the incoming machine must be such that its frequency (PN/120) equals bus-bar frequency. This can be measured by a frequency meter (Hz). c) The phase of the alternator voltage must be identical with the phase of bus-bar voltage. It means that the switch must be closed at (or very near) the instant the two voltages have correct phase sequence. This can be measured by synchronizing lamps or Synchronoscope.
Inverse Type Over Current Relay Trainer
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Inverse Type Over Current Relay Trainer
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A non-directional heavily damped induc­tion disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. The relay disc is so shaped that as it rotates the driving torque increases and offsets the changing restraining torque of the control spring. This feature combined with the high torque of the relay ensures good contact pressure even at currents near pick-up.
Transmission Line Simulator Trainer
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Transmission Line Simulator Trainer
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The set comprise of following modules:- (1) Input 3 phase DOL Starter panel will consist of : a) 4 pole MCB of 415 V/4A, b) DOL 9A Contactor with 230V / 50 Hz / 11VA COIL, c) Bimetallic thermal O/L relay with range 2.5A -6A (2) FWD-OFF-REV, Switch Panel will consist of : a) FWD/REV, 3 pole 3 way switch with center OFF, 6A/440V. (3) 3 Phase Bidirectional Power cum Energy meter panel will consist of : a) Bidirectional Multifunction, b) 3 phase 3/4 wire, 415VAC, CT Input 5A, c) LCD/LED display, Aux. supply 230V, 45-65Hz,5W, d) V, I, Hz, Pf, KVA, KW, KWH, e) Modbus RTU RS 485 connections. (4) VAR Compensation panel will consist of : a) VAR compensating capacitors (5) Transmission line Panel will consist of : a) Simulated model for transmission line (250kms) using R (10 ohm/600W), L(0.15H/5A) & C (2.2Uf / 630V) b) Simulated model for medium/long length transmission line for Pi model. c) Simulated model for medium/long length transmission line for T model. d) Optionally 2 transmission line panels supplied to simulate up to 500kms length. (6) RLC load panel - Table Top Panel will consist of a) 3 nos. of 600W resistors with switch selectable 7 nos. of taps at 100, 112, 125, 150, 175, 200 & 225, b) 3 nos. of inductor 1.5H/1A with switch selectable 6 nos. of taps at 0.3, 0.6, 0.75, 0.9, 1.2 & 1.5H, c) Capacitors 440VAC rating (3 nos. one per phase) with switch selectable 7 nos. of value of 2, 5, 10, 15, 20, 30 & 50μF. (7) 3 phase dimmer/variac panel – Table top panel will consist of a) 3 phase dimmer I/P : 415VAC, 50Hz, OP : 0-470VAC, 6A, 3 phase.
AC to DC Converter Panel
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AC to DC Converter Panel
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0.75 KW / 220 V / 1500 RPM DC Shunt/Compound Generator. · The terminals of armature and shunt field windings of the machine is brought over to bakelite plate fixed on C.I. terminal box fitted on top of machine. · Class F Insulation · Horizontal Foot mounted · Self-Fan Cooled · Screen Protected Drip Proof (SPDP) · IP-22 · Protection with Single Shaft Extension · Fabricated Base Plate suitable for mounting the two machines which will be coupled to each other by flexible coupling to form a set.