Over Current Relay Testing System Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12977
Indian Lab Suppliers supplies the Over Current Relay Testing System (Product ID: 12977) as part of its electronics engineering lab equipment range. It is a single-phase test panel for plotting the time-current characteristic of an electromechanical inverse-time overcurrent relay.
Quick Answer
The relay works from a 1 A CT secondary and has seven plug settings from 0.5 A to 2 A in 0.25 A steps. Current is raised through a variac (0–270 V, 0–5 A) and a 110 Ω, 5 A rheostat, and a timer (10 ms to 30 min) starts with the injected current and stops when the relay trips, so the operating time is recorded automatically. Repeating this at several multiples of the plug setting gives the inverse curve: the larger the current, the faster the trip. Voltage and current are shown together on a 16 × 2 LCD, and a diagram shows where the relay sits on a transmission line.
Key Specifications
| Parameter | Detail |
|---|---|
| Mains supply | 230 V ±10%, 50 Hz |
| Relay | Electromechanical, inverse time, 110 V AC 50 Hz, CT secondary 1 A |
| Current settings | 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2 A |
| Variac | Input 230 V; output 0–270 V; 0–5 A |
| Rheostat | 110 Ω, 5 A |
| Voltmeter | 25–300 V |
| Ammeter | 200 mA–5 A |
| Timer | 10 ms–30 min, automatic start/stop with the relay |
| Included | Learning material CD; 2-year warranty |
Where This Is Used
Used in switchgear and protection laboratories for relay setting and grading exercises. Terminals are at mains voltage and the rheostat gets hot at high current, so connect with the supply off. Related: IDMT Over Current Relay Kit (Product ID: 12995) and IDMT And Directional Over Current Relay Setup (Product ID: 10405). Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
What current settings does the relay have?
0.5 A to 2 A in 0.25 A steps, on a 1 A CT secondary.
How is tripping time measured?
By a timer that starts with the current and stops when the relay operates.
Is the relay electromechanical?
Yes, so its internal mechanism can be studied as it operates.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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