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Phone: +86 16626708626Description
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | 15 kV class |
| Continuous Current Range | 10–2000 A |
| Fault Current Range | 200 A to 40 kA |
| Fault Types Detected | Phase-to-phase, phase-to-ground |
| Response Time | < 1 cycle |
| Communication | RF wireless (900 MHz), optical port |
| Power Source | Self-powered via CT + lithium battery backup |
| Battery Life | 10+ years |
| Operating Temperature | −40 °C to +85 °C |
| Environmental Rating | IP68 |
| Mounting | Direct clamp-on to conductors |
| Directional Sensing | Yes |
4. Product Introduction
The ALSTOM EPSD-0603 DFI-150-0003 is a clamp-on digital fault indicator designed for medium-voltage overhead and underground distribution feeders. It monitors line current continuously and flags permanent phase-to-phase or phase-to-ground faults with directional information.
Self-powered from the conductor current transformer, it keeps operating through outages via lithium backup. IP68 sealing, −40 °C to +85 °C rating, and RF mesh networking make it a direct fit for outdoor feeders where crews need fast visual and remote fault location without external power or complex wiring.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs / no indication on power-up | Dead battery or CT not harvesting energy | ✅ High | Measure residual voltage across battery terminals; confirm clamp is fully closed on live conductor | Replace unit if battery voltage is below threshold after 24 h on line |
| False fault indication | Transient inrush or switching surge | ✅ Medium | Review event timestamp vs known switching events; check directional flag | Increase pickup threshold or enable transient filter if available |
| RF communication loss | Neighbor node out of range or interference | ✅ Medium | Walk test RF link with handheld receiver; verify optical port activity | Reposition unit or add intermediate mesh node |
| LED stuck red after fault clear | Residual current above reset threshold | ✅ High | Confirm load current has dropped below reset level for required time | Manually reset via optical port or wait for automatic reset |
| No directional data | Clamp orientation reversed | ✅ High | Verify arrow on housing points toward load (downstream) | Rotate clamp 180° and re-test |
If symptoms persist after these checks, send photos of the unit LEDs, clamp installation, and any diagnostic log from the optical port to technical support.
EPSD-0603 DFI-150-0003
EPSD-0603 DFI-150-0003
6. Frequently Asked Questions (FAQ)
Q: Is this unit self-powered or does it need an external supply?
A: It harvests energy directly from the conductor via its internal CT. A lithium battery provides backup during zero-current conditions. No external power wiring is required.
Q: Can I install it on a live line?
A: Yes, the clamp-on design is intended for live-line installation with proper hot-stick tools and PPE. Always follow your utility’s live-work procedures. Confirm the clamp is fully closed and the directional arrow points downstream.
Q: What is the difference between EPSD-0603 DFI-150-0003 and the older EPSD-0602 version?
A: The -0003 revision adds improved RF mesh networking and refined transient rejection. Mechanical clamp dimensions and basic current ranges remain compatible, but verify firmware and communication protocol against your existing network before mixed deployment.
Q: How long does the battery actually last in the field?
A: Manufacturer rating is 10+ years under normal load cycling. In low-load or intermittent feeders the battery may age faster. We log battery voltage during incoming inspection; request the test report if this is critical for your site.
Q: Is this New Surplus or refurbished?
A: Units offered as New Original / New Surplus come from verified OEM or authorized channels, are factory-sealed or unopened, and carry a 1-year functional warranty. They are not field returns or repaired boards.
Q: Does it support hot-swap or can I leave the old unit in place while installing the new one?
A: No. Remove the old indicator first. Parallel clamps on the same conductor can produce circulating currents and false readings. Install one unit per monitored phase section.
Q: What do I need to order as a direct replacement?
A: Quote the full model EPSD-0603 DFI-150-0003. If your existing unit has a different suffix or serial range, send a clear photo of the nameplate so we can confirm firmware and RF band compatibility before shipping.
