- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Overcurrent And Earth Fault Relay
Overcurrent And Earth Fault Relay (Product Code: SLE/EPS/01) is a programmable protection-relay module used to teach how overcurrent and earth-fault protection is set, tested and verified in power system and electrical engineering laboratories. It is based on the Micom P122 industrial relay and provides three independent three-phase overcurrent and earth-fault stages, the first selectable from 12 IDMT curves. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Relay basis | Micom P122 industrial relay |
| Programming | Keypad and display on the relay module; or relay support software on a suitable computer |
| Three-phase earth and overcurrent | Three independent stages; first stage selectable from any of 12 IDMT curves; remaining stages with a direct time characteristic |
| Restricted earth fault | High impedance |
| Thermal protection | Thermal overload |
| Negative-phase sequence overcurrent | Two independent stages |
| Other functions | Broken conductor detection; selectable blocking; undercurrent; circuit monitoring |
| Records | Trend, fault and disturbance records |
| Test arrangement | Connected to fault circuits set up on a Protection and Relay Test Set; most tests use single relays |
| Product code | SLE/EPS/01 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the Overcurrent and Earth Fault Relay Used For?
Protection relays decide when a circuit breaker must trip, and setting them correctly is a core skill for power engineers. In the lab, the lecturer or students build a fault circuit on the Protection and Relay Test Set, program the relay module for the test using its keypad and display (or from a computer running the relay support software), and then apply the fault. Measuring how quickly the relay operates at different fault currents lets students plot its real characteristic and compare it with the selected IDMT curve.
Because the first stage offers 12 IDMT curves and the remaining stages have a direct time characteristic, one relay can show how the choice of curve changes tripping times and how separate stages are graded against each other. Further exercises cover restricted earth fault, thermal overload, negative-phase-sequence protection and broken conductor detection, while the stored fault and disturbance records let students review each event after the test.
What to Specify When Ordering
- Whether you already have a Protection and Relay Test Set or need a test arrangement discussed with us.
- Whether a computer and the relay support software should be arranged for programming.
- Other protection relays for the same lab, such as differential, distance or directional types.
- Number of relay modules for your student groups.
Supplier
Jain Scientific Equipments Private Limited, trading as ScienceLab, sources and supplies the Overcurrent And Earth Fault Relay module to electrical engineering colleges, polytechnics, power-sector training institutes, dealers and importers in India and international markets. It can be quoted together with other relay modules and power system trainers as a single laboratory package.
Company background is available on the ScienceLab profile.
Related Power & Energy Systems Trainers
A protection laboratory typically combines several relay types with switching equipment:
- Directional/Non-Directional Overcurrent Relay — adds direction sensing for ring and parallel feeders.
- Differential Protection Relay — unit protection for transformers and machines.
- Distance Protection Relay — impedance-based protection for transmission lines.
- Circuit Breaker Trainer — shows the switching device that a relay trips.
Explore all Power & Energy Systems Trainers.
Frequently Asked Questions
Which relay is the Overcurrent And Earth Fault Relay module based on?
The Overcurrent And Earth Fault Relay module is based on the Micom P122 industrial relay, so students set and test an industrial protection relay rather than a simplified teaching device.
How many IDMT curves does the Overcurrent And Earth Fault Relay offer?
The Overcurrent And Earth Fault Relay offers three independent three-phase earth and overcurrent stages. The first stage is selectable from any of 12 IDMT curves, and the remaining stages have a direct time characteristic.
How is the Overcurrent And Earth Fault Relay programmed?
The Overcurrent And Earth Fault Relay is programmed with the keypad and display on the relay module, or with the relay support software on a suitable computer. Settings are entered before each test on the fault circuits.
What else is needed to test the Overcurrent And Earth Fault Relay?
The Overcurrent And Earth Fault Relay is connected to fault circuits set up on a Protection and Relay Test Set, and most tests are performed with single relays. Ask us through the contact page about a suitable test arrangement.
Who supplies the Overcurrent And Earth Fault Relay?
The Overcurrent And Earth Fault Relay is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, to engineering institutions, dealers and importers in India and international markets, alone or with other protection relays.
Is a calibration certificate available for the Overcurrent And Earth Fault Relay?
A calibration or test certificate for the Overcurrent And Earth Fault Relay module is not listed as standard. If your laboratory needs such documentation, please discuss it with us through the contact page before ordering.
Request a Quote
Send your requirement for the Overcurrent And Earth Fault Relay through the contact page or add it to the enquiry cart.
Last updated: 24 September 2026
