SCR Regulated DC Power Supply Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1419
Jlab Export is a leading SCR Regulated DC Power Supply Manufacturer,and suppliers in India
SCR Regulated DC Power Supply (code EL-PET-1419) is a power electronics training board for studying a DC power supply regulated by SCR phase control, in open loop and with closed-loop feedback. Students compare regulation and ripple with inductance-input and capacitor-input filters and with different UJT ramp and pedestal control schemes. JLab manufactures the board at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Power circuit | Two SCRs connected in bridge configuration with rectifiers; freewheeling diode |
| Transformer | 0–40 V, 500 mA |
| Triggering | UJT 2N2646 relaxation oscillator supplying the triggering pulses for the SCRs; pulse transformer 1:1:1 |
| Control circuit supply | Four diodes in bridge and one zener |
| Internal DC supply | 24 V DC regulated power supply, internally connected |
| Voltage adjustment | Three potentiometers for different modes of voltage adjustment |
| 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); variac, 0–230 V AC at 2 A |
| 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-1419 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the SCR Regulated DC Power Supply Board Used For?
In an SCR-regulated supply the DC output is set by the firing angle of the SCRs, and in closed loop a feedback signal moves the firing angle to hold the output steady as the load or the mains voltage changes. The filter matters too: a capacitor-input filter gives a higher DC output but poorer regulation, while an inductance-input filter regulates better and smooths the current. This board lets students measure output variation, regulation and ripple for these cases and for several UJT control methods, in power electronics practicals for diploma and engineering courses. Experiments that can be performed:
- Output voltage variation, regulation and ripple in open loop (without feedback) by varying the load, with an inductance-input filter
- The same experiment with a capacitor-input filter
- Output voltage variation, regulation and ripple in closed-loop feedback by varying the load, with an inductance-input filter and shunt transistor pedestal control
- The same experiment with a capacitor-input filter and shunt transistor pedestal control
- Variation in output voltage for different slopes of a linear resistance-controlled ramp
- Line voltage variation (open loop) compensation
- Output voltage variation, regulation and ripple in closed-loop feedback by varying the load, with series transistor-controlled ramp in differential amplifier mode
What to Specify When Ordering
- Other apparatus — the multimeter, oscilloscope and variac are separate items; list the ones you need on the enquiry.
- Companion boards — other SCR trainers for the same practical course can be quoted together.
- Quantity — the number of boards for your lab.
Frequently Asked Questions
What is the difference between open-loop and closed-loop operation on this board?
In open loop the firing angle is set by hand and the output varies with the load; in closed loop a feedback signal, through shunt transistor pedestal control or series transistor ramp control, adjusts the firing angle to reduce that change.
How are the SCRs triggered?
A UJT 2N2646 relaxation oscillator generates the triggering pulses, which reach the SCRs through a 1:1:1 pulse transformer.
What other apparatus is needed?
A 3¾-digit digital multimeter, a 20 MHz dual trace cathode ray oscilloscope used unearthed and a 0–230 V AC, 2 A variac. A variac varies the AC input voltage, which is what the line voltage variation experiment examines. All three are separate items.
What information is needed for an export quotation?
Please send the number of boards, the destination country and port or city, delivery terms such as FOB or CIF, any packing or labelling requirements and a tender reference if applicable.
Who manufactures the SCR Regulated DC Power Supply board?
Jain Laboratory Instruments Pvt Ltd, trading as JLab, makes it in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an Indian manufacturer of power electronics trainers and laboratory equipment, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The board is built at JLab’s own works and not bought in from a trader, so colleges, dealers and importers order it from the maker, each board is visually inspected before dispatch, and repeat orders go to the same works. JLab exports worldwide and ships to buyers in every region — for example Zambia in East Africa, Bhutan in South Asia, Singapore in Southeast Asia, Angola in Central Africa and Sudan in North Africa. Tender details are on the JLab lab tenders page.
Related SCR Trainers
- SCR Converters and Reactive Loads — half and fully controlled SCR bridges with resistive, inductive and capacitive loads.
- SCR And AC Phase Control — resistance, RC and UJT trigger circuits for SCR phase control.
- UJT Relaxation Oscillator — a UJT board for relaxation oscillator and SCR trigger circuit studies.
- 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
For a quotation, use the Add To Cart enquiry button or the contact page, and give the number of boards, the delivery destination and any other apparatus you want included.
Last updated: 22 October 2026
