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Shunt Active Filter Trainer

Specification

• FPGA Spartan 3A DSP board used for generating the PWM signals. • Three phase 3 level diode clamped inverter used as a Active filter. • SRF (or) Instantaneous PQ theory will be used to generating reference current. • PI control or fuzzy logic will be used to regulate the dc link capacitor voltage. • Reference DC link Voltage will be 250V. • Hall effect current transducers used to sense the source currents, load currents and compensation currents. • Hall effect voltage transducers used to sense the dc link voltage and source voltages. • Necessary source inductor and filter inductor provided. • Input source Line voltage -200V (Peak). • Input source Current -10A (Peak). • Power Rating -3KW. • Reactive power compensation can be provided. • 3KW linear and non-linear loads will be given. • User can modify source, filter inductance and external loads. • User can modify control algorithm. • Industrial type cabinet provided. • Before compensation source current THD will be greater than 26% • After compensation source current THD - 2.5 - 4% in 3 level inverter - 4 - 5% in 2 level inverter

Bar & Gauge

Description

To illustrate expansion of metal on heating and contraction on cooling, with steel bar of length 100 x 10 mm and plated brass gauge with a cutout to just accommodate the bar and two holes through which the bar passes when cold.

Trans-Ratio

Description

Trans-Ratio is a simple transformer system that allows students to investigate the relationship between primary voltage, secondary voltage and the turns ratio. The Primary coil has tappings at 200, 400 and 600 turns while the Secondary has 100, 200, 300, 400, 500 and 600 turns all brought out to 4mm sockets. An AC supply of upto 6 V as well as AC voltmeters are required for demonstration purpose.

Magnetic field demo, vertical wire

Description

For investigating magnetic field around a wire. Maximum current is approx. 8A. diameter of wire is 1.5 mm.
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AJAX PRODUCTS TABS SIMPLE

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Small Dental Care Model (32 Teeth) PVC

This model is to serve for demonstration in mouth protection and relative clinical teaching. Consists of gum, teeth, tongue and palate. It demonstrates teeth form and oral cavity cleaning and protection. With tooth brush. Size: 11.3x17x10cm.

Handheld GPS

Description

We offer all varieties of portable handheld GPS, hand held GPS systems and export all varieties of GPS, presently used by people around the World. Area measurement using hand-held gps. simply walk, ride, drive or fly around the perimeter, and press a button simple. Handheld gps at the gps store, inc. your source for garmin gps map 62, garmin oregon and montana handheld gps, magellan explorist units, gps map receivers and more.

Underground Mine Model

Description

Shows mining when any ore body lies at a considerable distance below the surface. The specific mining method selected depends upon the size, shape and orientation of the ore body and the depth involved.

Study of Operation Amplifier

To demonstrate the function of operational amplifier using TL081 and L272 with discrete components different value of resistors, capacitor. Input can be applied from microphone, LDR. Offset null control is also provided. Output can be fed through the power amplifier into a loudspeaker.
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AJAX PRODUCTS TABS ALTERNATIVE

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Scalpels

Stainless Steel Handle length 113mm. Blade length 45mm.

Vernier Calipers Double Scale

Vernier Calipers Double Scale • Vernier Caliper Double Scale Sturdy construction. • Measures in inches and cm. • 150 mm x 0.05 mm / 6 inch x 1/128 inch

Lens Holder Wooden

Description

Wooden, with V shaped slot to take spherical lens or mirror up to 75 mm diameter, with index mark.
Lense holder, Wooden, 'V' Shaped.

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AJAX PRODUCTS TABS ARROWS PAGINATION

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Pregnancy Pelvis With Baby

Description

Showing a median section through female pelvis in 9th month of pregnancy with a removable foetus to study normal position of child before birth. On base with key card.

Magnetic Numbers

Every child loves to play with magnetic numbers on the refrigerator. These durable EVA numbers ore bright in color with soft magnetic backing and are BIG for easy handling. Set of 60 numbers 30 Additional operation symbols and Magnetic plate set of 3 is packaged in a reusable storage box.

Stop Watches

Chrome plated steel case, non-rusting, dust and damp-proof, 7- Jewelled lever movement bold figures, white dial and black steel hands. With start, stop and resent arrangement. 1/5th seconds 30 minutes 1/10th seconds 60 minutes
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AJAX PRODUCTS TABS WITH ICONS

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Endocrine Glands

Pituitary Gland TS Thyroid Gland TS Parathyroid Gland TS Pancreas TS Thymus Gland TS Ovary TS Testis TS Pineal Gland TS

SCR VI Characteristics Study Trainer

Specification

• Basic VI characteristics study trainer. • Consists of one no. TYN612 SCR with heat sink. • LM723 based 20V DC power supply for gate voltage. • One no. potentiometer used to vary the gate current • 0- 30V DC variable power supply for anode, cathode voltage variation. • One no. potentiometer used to vary the Vak. • One no. high voltage fixed load resistor. • One no. toggle switch to ON/OFF gate voltage. • Two nos. DC ammeter, voltmeter/multimeter provided to measure Ig&Vak, Ia. • 230V AC input. Power ON/OFF switch. • All components are mounted on a screen printed PCB fixed on a nice wooden cabinets.

Bicycle Dynamo Assembly

Description

A cycle dynamo with crank handle, is fitted on base with two output terminals which are connected in parallel to a lamp holder with a lamp.
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AJAX PRODUCTS TABS LOAD MORE PAGINATION

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SILICA CRUCIBLE WITHOUT LID

PRODUCT DESCRIPTION
  • Crucible is glazed inside and outside.
  • Highly resistant to alkalis and hot temperatures
  • 50ml capacity
  • Outside diameter 55mm, 42mm height
  • No lid includedSilica crucible is glazed inside and outside. Highly resistant to alkalis and hot temperature SIZES ARE: 15ML 25ML 50ML 80ML 100ML 150ML

SILICA CRUCIBLE TALL FORM Without Lid, Translucent

PRODUCT DESCRIPTION -Without lid, translucent, glazed - Ordinary type lids to be purchased separately Size/ dimension:
  • 20ml,  Dia. 35mm x Ht. 38mm
  • 30ml, Dia. 43mm x Ht. 38mm
  • 50ml, Dia. 51mm x Ht. 51mm

SILICA MUFFLE TRAYS (For VM Crucible)

PRODUCT DESCRIPTION:   Available in 2types:  Two Hole, 39mm Length Four Hole, 76mm Length
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AJAX PRODUCTS TABS CAROUSEL

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