Earth Fault Relay Testing System Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12979
Indian Lab Suppliers supplies the Earth Fault Relay Testing System (Product ID: 12979) as part of its electronics engineering lab equipment range. It is a panel for testing an electromechanical inverse-time earth fault relay and showing its place in a transmission line circuit.
Quick Answer
The relay has seven plug settings from 0.5 A to 2 A and operates when the earth (residual) current exceeds its setting, faster for larger currents. Test current comes from a 0–270 V, 4 A variac through a 1 kVA 230/230 V isolation transformer and a 110 Ω, 5 A rheostat, and a timer (10 ms to 30 min, with reset) records the operating time while digital meters read current (5 A) and voltage (300 V). A line circuit from source to distribution, with a 40 W lamp load and a 40 W 230/230 V transformer, shows where the relay is connected. Three experiments are listed: operating characteristics at different plug settings, connection in a line, and relay testing.
Key Specifications
| Parameter | Detail |
|---|---|
| Mains supply | 230 V AC ±10%, 50 Hz; 5 A MCB; neon indication |
| Variac | Input 230 V; output 0–270 V; 4 A |
| Isolation transformer | 1 kVA, 230 V / 230 V |
| Line transformer | 230 V / 230 V, 40 W |
| Relay | Electromechanical inverse time; plug settings 0.5–2 A in 0.25 A steps |
| Meters | Digital AC ammeter 5 A; digital AC voltmeter 300 V; timer 10 ms–30 min |
| Load | 40 W lamp |
| Dimensions / weight | W 800 × H 600 × D 350 mm; about 62 kg |
| Accessories | 14 shrouded 4 mm patch cords (7 red, 7 black); rheostat 110 Ω, 5 A |
Where This Is Used
Used in switchgear and protection laboratories for earth fault protection practicals. Although the test supply is isolated, terminals are at mains voltage, so connect with the supply off and keep the panel earthed. Related: Three Phase Over Current & Earth Fault Numeric Relay Testing System (Product ID: 12985) and Combined Earth Fault and Over Current Numerical Relay Kit (Product ID: 12996). Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
What plug settings are available?
0.5, 0.75, 1, 1.25, 1.5, 1.75 and 2 A.
Why is an isolation transformer used?
So the injected test current is separated from the mains earth.
What load is used in the line circuit?
A 40 W lamp.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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