SCR Converters and Reactive Loads Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1418
Jlab Export is a leading SCR Converters and Reactive Loads Manufacturer,and suppliers in India
SCR Converters and Reactive Loads (code EL-PET-1418) is a power electronics training board for studying single-phase SCR bridge converters with reactive loads and why simple UJT triggering falls short with them. Auxiliary SCRs in a pulse amplifier and extender configuration demonstrate the extended-pulse technique that overcomes it. JLab builds the board at its own works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Trigger source | UJT relaxation oscillator and triggering pulse generator with resistance ramp control |
| Pulse transformers | Three, each 1:1:1 type |
| Auxiliary SCRs | Two SCRs in pulse amplifier and extender configuration, used to trigger the main SCRs under reactive load |
| Half-controlled bridge | Two SCRs and two diodes in half-controlled bridge configuration |
| Fully controlled bridge | Four SCRs in full-wave bridge configuration |
| Loads | Resistive, inductive and capacitive, usable individually or in combinations |
| Mains transformer | Outputs 0–12 V at 100 mA, 0–12 V at 100 mA and 0–32 V at 500 mA |
| Mains controls | Mains on/off switch, fuse and jewel light |
| Mains supply | 230 V ±10%, 50 Hz AC |
| Patch cords | Stackable, 4 mm spring-loaded plugs, half a metre long |
| Terminals | Terminals/sockets on the panel for connections and observation of waveforms |
| Operating instructions | Detailed, giving object, theory, design procedures, report suggestions and book references |
| Other apparatus required | Digital multimeter, 3¾ digit; dual trace cathode ray oscilloscope, 20 MHz (unearthed) |
| Weight | 3 kg (approx.) |
| Dimensions | W 340 x H 110 x D 210 |
| Packing | Corrugated box |
| Quality check | Each board is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PET-1418 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the SCR Converters and Reactive Loads Board Used For?
With an inductive load the current through an SCR rises slowly after the gate pulse, and if a short UJT pulse ends before the current reaches the latching level the SCR drops out again, so the converter misfires. Lengthening the gate drive — here through auxiliary SCRs acting as a pulse amplifier and extender — keeps the gate signal present until the main SCR has latched. The board lets students see this limitation and its cure, then compare the half-controlled bridge with the fully controlled four-SCR bridge in converter mode, as part of power electronics practicals in diploma and engineering courses. Experiments that can be performed:
- SCR triggering in a half-controlled bridge under reactive loads, and the limitations of simple UJT triggering circuits
- SCR triggering in a half-controlled bridge under reactive loads using an auxiliary SCR triggering circuit with the extended pulse technique
- The half-controlled bridge and the action of the freewheeling diode
- Operation of the fully controlled full-wave four-SCR bridge in converter mode
What to Specify When Ordering
- Other apparatus — the digital multimeter and the oscilloscope are separate items; list the ones you need on the enquiry.
- Companion boards — for example the SCR phase control or UJT boards, if the course uses them.
- Quantity — the number of boards for your power electronics lab.
Frequently Asked Questions
Which loads can be connected?
Resistive, inductive and capacitive loads are built in and can be used one at a time or in combination, so students can compare converter behaviour with each.
Which bridge configurations are on the board?
A half-controlled bridge of two SCRs and two diodes, and a fully controlled full-wave bridge of four SCRs.
What other apparatus is needed?
A 3¾-digit digital multimeter and a 20 MHz dual trace cathode ray oscilloscope used unearthed. Both are separate items that can be quoted with the board.
What information is needed for an export quotation?
Give the number of boards, the destination country and port or city, the delivery terms you want (for example FOB or CIF), any packing or labelling requirements and the tender reference if there is one.
Who manufactures this trainer?
JLab (Jain Laboratory Instruments Pvt Ltd) makes it in Ambala, Haryana, India, and quotes for it as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a manufacturer of power electronics and electronics teaching boards in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The board is built in JLab’s own works rather than bought from a trader, so engineering colleges, polytechnics, dealers and importers purchase it from the maker, each board is visually inspected before dispatch, and repeat orders are served by the same works. JLab exports worldwide and ships to buyers in every region — for example Zimbabwe in East Africa, Thailand in Southeast Asia, Tonga in Oceania, Taiwan in East Asia and Cameroon in Central Africa. The JLab lab tenders page has details for tender buyers.
Related Power Electronics Trainers
- Single Phase Half Controlled Symmetrical — a single-phase board for half-controlled symmetrical and asymmetrical bridge converters.
- Single Phase Fully Controlled Bridge Converter — a single-phase bridge of four SCRs with UJT firing.
- SCR And AC Phase Control — resistance, RC and UJT trigger circuits for SCR phase control.
- Dual Trace Oscilloscope — a DC to 20 MHz two-channel cathode ray oscilloscope, quoted separately.
See all Power Electronics Trainers or the full Electronics Lab Equipments range.
Request a Quote
Ask for a quotation using the Add To Cart enquiry button or the contact page, with the number of boards, the delivery destination and any other apparatus to be quoted with them.
Last updated: 22 October 2026
