The Littelfuse PGR 8800 Arc Flash Relay and its arc sensors are easy to install in new or existing switchgear. For optimal coverage, it’s recommended to install one or two sensors per cubicle to monitor busbars, breakers, drawers, and other high-risk areas. Fiber-optic sensors can be used for additional coverage and redundancy. Even in de-energized areas, monitoring can prevent potential damage.
Features of Littelfuse PGR 8800 Arc Flash Relay
- 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 of Littelfuse PGR 8800 Arc Flash Relay
- Transformer compartment
- Switchgear cubicle
- Motor control center
Specification of Littelfuse PGR 8800 Arc Flash Relay
| 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 a 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 | The 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 |
Dimension of Littelfuse PGR 8800 Arc Flash Relay
Wiring of Littelfuse PGR 8800 Arc Flash Relay dimension
