Current-sensing detection
Ammetric indicators that flag the passage of a fault current on the conductor.
- Short-circuit detection
- Earth-fault detection
- Adjusts to line voltage & frequency
Product · Fault detection
Overhead fault passage indicators for MV lines 5–38 kV.
Current-sensing fault passage indicators, JYZ-HW/HT series, clamped directly onto the overhead conductor. When a fault current passes, an ultra-bright 360° LED flags it — visible from a distance, day or night — so crews find the faulted feeder section in minutes. An optional communication unit brings that indication straight to your SCADA.
Key specifications
- Voltage: 5–38 kV overhead lines
- Detection: current-sensing, short-circuit & earth fault
- Signalling: ultra-bright 360° LED
- Comms: optional communication unit → SCADA
Capabilities
The fastest way to see a fault on an overhead feeder.
A simple, rugged device that turns hours of line patrol into a glance down the feeder — and, when connected, into a real-time SCADA event. Read our guide on fault passage indicators →
360° LED signalling
Ultra-bright light indication visible from a distance, from any angle.
- Highly visible day & night
- 360° all-round view
- Fast on-site fault location
Feeder monitoring
Watch MV feeders and outgoing lines section by section.
- Per-section indication
- Faulted segment bracketed
- Shorter patrol times
Optional communication
Add a communication unit to report the indication remotely.
- Integration with a DCU
- Remote reporting to SCADA
- Permanent / transient distinction
Long, maintenance-free life
Self-powered by the line with backup battery for years of unattended service.
- Line-powered + backup battery
- Up to 10+ years maintenance-free
- Built for harsh outdoor conditions
Simple, fast install
Clamped straight onto the conductor — no outage, no complex setup.
- Hot-line clamp mounting
- Self-configuring (model-dependent)
- Automatic or manual reset
Technical selection
Typical specifications.
Indicative characteristics — exact values depend on the selected Four-Faith model (e.g. JYZ-HW, JYZ-HT). Ask us for the datasheet matched to your network.
| Characteristic | Typical value |
|---|---|
| Network voltage | 5–38 kV overhead lines |
| Detection | Current-sensing (ammetric): short-circuit and earth fault |
| Signalling | Ultra-bright 360° LED, visible from a distance |
| Reset | Automatic (timer), on voltage restoration, or manual |
| Communication | Optional, via communication unit / DCU to SCADA (model-dependent) |
| Power | Line-powered with backup battery, up to 10+ years (model-dependent) |
| Mounting | Clamped on the overhead conductor |
| Series | JYZ-HW, JYZ-HT (model-dependent) |
How it works
See which section saw the fault.
Detectors sit along the feeder. When a fault passes, every indicator upstream of it lights up; those downstream stay dark. The faulted section is the one between the last lit detector and the first dark one.
/01
Fault current passes
The ammetric indicators on the conductor detect the abnormal current.
/02
LED flags it
Each detector that saw the fault lights a bright 360° LED, visible from the ground.
/03
Optional SCADA report
With a communication unit, the indication is relayed to the control centre.
300+
Fault detectors deployed on the CI-ENERGIES network
As part of the NEDA project (World Bank funding), more than 300 fault detectors were installed on the Ivorian distribution network — the clearest proof of what overhead fault detection delivers at scale, delivered by the ENERTEC group.
NEDA PROJECTCI-ENERGIES
WORLD BANKFunding
WORLD BANKFunding