Three Phase Over Current & Earth Fault Numeric Relay Testing System Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12985
Indian Lab Suppliers supplies the Three Phase Over Current & Earth Fault Numeric Relay Testing System (Product ID: 12985) as part of its electronics engineering lab equipment range. It is a test panel built round a microcontroller-based three-phase overcurrent and earth fault numerical relay with its own current injection source.
Quick Answer
The relay is a four-element (three phase elements plus earth fault) non-directional IDMT/DMT unit. From its keypad students choose one of six curves (normal inverse 1 and 2, very inverse, extremely inverse, long-time inverse and definite time), set the current setting and the time multiplier setting (TMS), and select a 1 A or 5 A CT secondary. The earth fault element works on the zero sequence current (3I0) that the relay calculates from the three phase currents. Current is injected and adjusted from the panel, LED displays show the three input currents and the tripping time, and pick-up occurs within 1.1 times the set value with reset at 90–95% of pick-up.
Key Specifications
| Parameter | Detail |
|---|---|
| Mains supply | 415 V ±10%, 50 Hz, three phase; auxiliary 230 V ±10% |
| Relay | Numerical, 4 element (3 phase + earth fault), non-directional, IDMT/DMT |
| Curves | NI1, NI2, VI, EI, LTI, definite time |
| CT secondary | 1 A or 5 A, selectable |
| Pick-up / reset | Within 1.1 × setting / 90–95% of pick-up |
| Relay auxiliary supply | 18–250 V AC/DC |
| Displays | LED three-phase current display (>100 mA); LED tripping-time display; relay LCD |
| Protection | TPN MCB 10 A; fuses |
| Dimensions / weight | W 800 × D 350 × H 600 mm; about 33 kg |
Where This Is Used
Used in power system protection laboratories for relay setting, TMS and curve-selection exercises and for showing relay connection on a line. The panel runs from 415 V three phase, so keep it earthed and change connections with the supply off. Related: Over Current Relay Testing System (Product ID: 12977) 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
Which characteristic curves are available?
Normal inverse 1 and 2, very inverse, extremely inverse, long-time inverse and definite time.
How is earth fault current obtained?
The relay calculates the zero sequence current 3I0 internally.
Can the CT secondary rating be changed?
Yes, 1 A or 5 A.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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