Grid Solutions Multilin A60 Advanced Light & Pressure Arc Flash Detection System An arc flash event is the sudden release of electrical energy through the air. The resulting forces can produce temperatures up to 35,000°F, causing copper to turn into plasma expanding by 67,000 times. With these type of extreme events, fast, reliable arc flash detection is critical to avoid significant damage to equipment. The MultilinTM A60 Arc Flash System utilizes a unique sensing method that detects both light and pressurized sound signals that occur during an arc flash event, enabling more reliable and faster operating times to reduce the total arc energy generated. Utilizing a patented arc flash sensing method, the Multilin A60 is able to reliably detect an arc flash event in as fast as 1 msec (when compared to not having any arc flash detection device). Key Benefits • GE patented, dual input light and pressure wave sensors for fast, reliable arc flash detection • Continuous health monitoring of optical sensors, fiber cables, and control unit to ensure reliable operation Advanced Arc Flash Detection • GE patented, high-speed arc flash system utilizing light and pressure wave detection technology • Stand-alone unit providing continuous operation, 24/7 • Continuous self-supervision (health monitoring) of sensors, fiber cables, and arc flash relay with trouble indication • Up to five arc flash sensors per relay for detection in multiple locations within switchgear • Direct connection to breaker trip circuit using solid state output relays, for increased operating speed • Multi-stage detection for reduced nuisance tripping with optional external current supervision input • Simplified installation and configuration with sensor auto-calibration and no requirement for additional setup software • Multiple unit connectivity and transfer trip capability to ensure optimized coverage for large applications • No requirement to install additional CT’s reducing time and costs associated with installation and commissioning Applications • Arc flash detection system for medium voltage switchgear • Suitable for new and existing medium voltage switchgear applications Reliable Operation • External current supervision from IOC device • Five solid state output relays for fast trip initiation • Six digital inputs with transfer trip capability for cascading applications • Arc flash sensor auto-calibration • Operating temperature range from -40°C to +60°C Easy to Use & Install • DIN Rail mounting • Slide switches and rotary dial for device setup • No setup software required • Local and remote reset capability • Three

Overview An arc flash event is the sudden release of electrical energy through the air. The resulting forces can produce temperatures up to 35,000°F, in less than one thousandths of a second, causing copper to turn into plasma expanding by 67,000 times. The arc event remains as long as there is enough power to maintain the short circuit. With these type of extreme events, fast, reliable arc flash detection is critical for the power and process industries in order to avoid significant damage to equipment and reduce the repair and replacement costs, as well as downtime of the power system. The...

As the Multilin A60 utilizes both light and pressure to detect an arc flash condition, installation and wiring of external CT’s is not required. An external current supervision from a separate Instantaneous Over Current (IOC) device may be used and connected as a contact input on the Multilin A60 for enhanced security and mitigation of nuisance tripping. Calibration & Testing The Multilin A60 provides an auto-calibration function for the sensors, reducing total commissioning and testing time. Once installed and powered, the device will first run in calibration mode. This mode sets the thresholds...

Control Panel Interface The Multilin A60 faceplate provides easy device configuration and operating status though bright LED indicators, a pushbutton, slide switches and a rotary switch. Three LEDs provide indication of Status (operating mode), Trip and Trouble. Optical Arc Flash Sensor Utilizing light and pressure detection technology in one sensor head Simple slide switches and a rotary switch provide all the required configuration for the Multilin A60, eliminating the need for separate setup software, simplifying and reducing total setup and commissioning time. Arc Flash Sensor Inputs – Total...

Typical Wiring Diagrams & Application Examples The figure below shows the typical wiring diagram of the Multilin A60 Arc Flash System. The typical wiring diagram shows the connection of the input and output relays and the connected sources. The wiring diagram also shows the connection of the supervisory circuit (option) to the A60 unit. This figure describes how a cascading of multiple Multilin arc flash systems (AFS) using the transfer trip feature can be implemented. In the figure, the AFS 1 unit protects a large incoming circuit breaker compartment, and the AFS 2 sensors are connected to the...

Technical Specifications DIGITAL INPUTS POWER SUPPLY Total six 24 V dry inputs Isolated Current Draw @ Rated Voltage: 10 mA @ 24 V Input Impedance: 1 MΩ Type: Dry contacts NOMINAL • 100 VAC to 240 VAC 50/60 Hz • 125 VDC to 250 VDC RANGE • 100 VDC to 300 VDC 50/60 Hz POWER CONSUMPTION Maximum Consumption: 10 W SENSOR INPUTS Five self-monitored inputs SMI to SMI (Small Media Interface), Duplex, 2.20 mm, Plastic Optical Fiber Bend radius of 25mm max RELAY OUTPUTS SOLID STATE RELAY OUTPUTS Maximum continuous current: A 6 Operate time : 60 μs Make and carry for 0.2s: 30 A per ANSI C37.90 SSR BREAKING...