PGG-0072

Protection Relays and Controls Arc-Flash Monitoring PGR-8800 SERIES (D1000) Arc-Flash Relay Description The PGR-8800 is a microprocessor-based relay that limits arc-fault damage by detecting the light from an arc flash and rapidly tripping. Phase-current-transformer inputs are provided for current-constrained arc-flash protection and, when so equipped, a programmable definite-time overcurrent function can be enabled. An optical sensor on the PGR-8800 and adjustable trip level reduce the chance of nuisance tripping by setting a threshold for ambient light. Sensors, inputs, and connections are monitored to ensure fail-safe operation. A secondary solid-state trip circuit provides a redundant trip path. A USB port is used for configuration and access to event logs and graphs. Simplified Circuit Diagram Optical Sensors 5-A-SECONDARY PHASE CT’s (Recommended) D A The PGR-8800 accepts both PGA-LS10 and PGA-LS20/ PGA-LS30 optical sensors, designed to collect light over a wide angle and with high sensitivity. For fast fault location, front-panel and sensor LED’s indicate sensor health and which sensor detected an arc fault. B C Sensor Placement PGA-LS10 (Point Sensor) PGR-8800 (Arc-Flash Protection Relay) L1 L2 PGA-LS20/ B PGA-LS30 (Fiber-Optic Sensor) Trip 24 Vdc Battery Backup (Optional) A PGA-1100 C (Diode Logic Unit) (Optional) For detailed wiring diagram, see adjacent page. Ordering Information ORDERING NUMBER DESCRIPTION PGR-8800-00 (UL, CE, CSA, RCM) Arc-Flash Relay PGR-8800-00-CC (UL, CE, CSA, RCM) Arc-Flash Relay, Conformally Coated ACCESSORIES REQUIREMENT PGA-LS10 Required* PGA-LS20, PGA-LS30 Required* PGA-1100 Optional Current Transformer Recommended The PGR-8800 Arc-Flash Relay and sensors are easily installed in retrofit projects and new switchgear with little or no re-configuration. Even elaborate systems with multiple power sources take minutes to configure using the relay’s built-in USB interface software. Generally, it is recommended to mount 1 or 2 sensors per cubicle to cover all horizontal and vertical bus bars, breaker compartments, drawers, and anywhere that there is potential for an arc-fault. Threading a fiber-optic sensor through the cabinets and in areas where point-sensor coverage is uncertain results in complete coverage and an added level of redundancy. Even if policy is to only work on de-energized systems, all maintenance areas should be monitored to prevent potential damage and additional cost. At least one sensor should have visibility of an arc fault if a person blocks the other sensor(s). Local Circuit Br eaker DD D *At least one sensor is required. However, the exact number of sensors for proper coverage depends on the application. © 2016 Littelfuse Protection Relays & Controls Littelfuse.com/ArcFlash Rev: 4-I-050516 Based on Manual Rev 3-C-040816 Protection Relays and Controls Arc-Flash Monitoring PGR-8800 SERIES (D1000) Features & Benefits FEATURES Arc-Flash trip time