Differential Relay Testing System Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12980
Indian Lab Suppliers supplies the Differential Relay Testing System (Product ID: 12980) as part of its electronics engineering lab equipment range. It is a panel for testing an electromechanical differential relay with two independent current injection units.
Quick Answer
A differential relay compares the currents entering and leaving a protected section, such as a transformer or generator winding, and trips when their difference exceeds its setting; a fault outside the section leaves the two currents equal and the relay stays stable. On this panel two variable current injection units stand in for the two CT secondaries, and a 16 × 2 LCD shows both currents and their difference, so students raise one current until the relay operates and plot its characteristic. The injection units are fed from an isolated single-phase variac (0–270 V, 2 A) and a 230/24 V, 3 A transformer. The relay setting range is not listed; please confirm it at quotation.
Key Specifications
| Parameter | Detail |
|---|---|
| Mains supply | 230 V AC ±10%, 50 Hz |
| Variac | Isolated; input 230 V AC; output 0–270 V AC; 2 A |
| Transformer | 230 V / 24 V AC, 3 A |
| Current injection | 2 variable units |
| Relay | Electromechanical differential relay |
| Display | 16 × 2 LCD: both currents and differential current |
| Dimensions / weight | W 830 × D 350 × H 645 mm; about 62 kg |
| Included | Learning material CD; 2-year warranty |
Where This Is Used
Used in switchgear and protection laboratories for unit protection of transformers and generators. Terminals are at mains potential on the variac side, so connect with the supply off. Related: Percentage Biased Differential Relay Trainer (Electromech / Numeric) (Product ID: 12855) and Over Current Relay Testing System (Product ID: 12977). Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
Why are two current sources needed?
They represent the currents on the two sides of the protected zone.
What does the LCD show?
Both injected currents and the differential current.
Is the relay electromechanical?
Yes, so its internal working can be studied.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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