Features
- Continuous system self-supervision
- Event logs, disturbance recording and real-time clock
- Three-phase current, Zero-sequence current
- Two change-over alarm contacts including IF
- Complete digital design, simple principle;
- Strong electrical performance;
- Comprehensive record of fault information;
- Double criterion of over-current and arc, high reliability;
- Optical fiber transmits, strong electromagnetic interference resistance;
- Programmable logic of trip exit;
- Fast exit tripping, short total fault clearing time.
Applications
- Reduce the harm of arc light to human body;
- Reduce damage to equipment caused by arc short-circuit faults;
- Avoid transformer damage caused by bus failure;
- Protect the dc system in the station;
- Ensure the stable operation of power substations;
- Thermal power plant electrical section switchgear;
- Wind farm and photovoltaic station switchgear;
- Large municipal engineering project;
Specification
| FEATURES | BENEFITS |
| Arc-flash trip time <1 ms | Limits arc-flash damage and risk of injury |
| Multiple sensors (up to 24) | A single unit can monitor six sensors. Up to four PGR-8800 units can be linked into one system |
| Fail-safe system | Continuous monitoring of optical sensors and inputs ensures protection |
| Redundant trip circuit | Solid-state backup arc-detection circuit adds a second layer of safety |
| Adjustable light sensitivity | Allows for operation in bright environments and maximum sensitivity in dark environments |
| LED indication (on unit and each sensor) | 18 LEDs provide at-a-glance status for module and I/O state |
| Current detection | Phase-CT inputs provide overcurrent protection and prevent nuisance trips |
| Optical detection | Point and fiber-optic sensors provide wide detection area with sensor health trip indication |
| Digital inputs (6) | Two each: remote trip, inhibit, and reset inputs |
| Service mode | Allows for system test without tripping |
| Trip coil contact | Solid-state 24–300 V dc/24–300 V ac IGBT |
| Indication contacts | Form C and status outputs |
| USB interface | Data logging and configuration software use a USB interface with no drivers or software installation |
| Built-in sensor | Can be used in single-sensor systems, as a seventh sensor, and for calibration |
| Universal power supply/battery backup | 100–240 V ac, 14–48 V dc, or 110–250 V dc supply accepted. Ability to charge and run off an external, user-supplied 24 V dc battery |
| Data logging | On-board event recorder helps with system diagnostics |
| Modbus | Remotely view measured values, event records, and reset trips |
| Upstream tripping | Ability to trip upstream device if the local breaker fails to clear the fault |
