Percentage Biased Differential Relay Manufacturer,Supplier and Exporter in India
Product Code : ILS-EELE-10404
Indian Lab Suppliers supplies the Percentage Biased Differential Relay (Product ID: 10404) as part of its electronics engineering lab equipment range. It is a test set-up for studying a percentage biased differential relay, the main protection used on transformers and generators.
Quick Answer
The relay compares the currents entering and leaving the protected zone and trips when their difference exceeds a set percentage of the through (bias) current, so it stays stable on heavy external faults. A phantom fault is created with a continuously variable autotransformer and a current limiter. Digital ammeters read the differential and through currents, and a digital start/stop time interval meter measures the operating time. Power-on and trip-status indicators are built in, and terminals and patch cords for all relay connections are supplied.
Key Specifications
| Parameter | Detail |
|---|---|
| Relay | Percentage biased differential |
| Fault simulation | Phantom fault via continuously variable autotransformer and current limiter |
| Meters | Digital ammeters for differential and through current |
| Timing | Digital start/stop time interval meter |
| Indicators | Power on, trip status |
| Accessories | Terminals and patch cords |
Where This Is Used
Used in protection labs alongside IDMT And Directional Over Current Relay Setup (Product ID: 10405) and Under And Over Voltage Relay Setup (Product ID: 10407). The panel runs on mains: keep it earthed and switch off before changing connections. Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
Why is the relay biased?
Bias raises the operating threshold with through current, so CT mismatch on heavy external faults does not cause a false trip.
How is a fault simulated?
With a variable autotransformer and current limiter (phantom fault).
Can operating time be measured?
Yes, with the digital start/stop time interval meter.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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