Littelfuse AF0100 Arc-Flash Relays
Littelfuse AF0100 Arc-Flash Relays limit arc-flash damage by using light sensors to rapidly detect the arc and trip a circuit breaker. Littelfuse AF0100 monitors sensors, inputs, and trip-coil voltage to ensure fail-safe operation. These microprocessor-based protection relays include a secondary solid-state circuit that provides a redundant trip path in shunt trip mode. AF0100 serves electrical systems operating at any voltage (AC or DC) since it does not directly connect to the system.
The small size of the AF0100 allows installation in any switchgear cubicle, transformer compartment, generator control panel, or motor control center bucket. AF0100 accepts PGA-LS10 (point), PGA-LS20 (fiber), and PGA-LS30 (fiber) optical sensors. These sensors have been designed to have a wide detection angle and provide the correct sensitivity for an arc flash.
Features
- Compact: Fits into a wide range of arc-flash applications
- Two optical sensor types: Point sensors or fiberoptic sensors can be used in any combination for coverage flexibility
- Dual sensor inputs: One relay can monitor two arc-flash sensors
- Adjustable light sensitivity: Allows for operation in bright environments and maximum sensitivity in dark environments
- Discrete wire networking: User can interconnect multiple AF0100 or AF0500 units to form a system
- Fail-safe system: Continuous monitoring of optical sensors and inputs ensures protection
- USB interface: Easy-to-use configuration software with no drivers or software installation
- Unit health: Ensures continuous protection with self-diagnostic and remote unit-healthy indication
- LED Indication: Trip and sensor status indication both on relay and sensors
Applications
- Switchgear cubicles
- Transformer compartments
- Generator control panels
- Motor control center buckets
Specifications
- -40°C to +70°C operating temperature range
- Input voltage
- AF0100-00: 100V to 240VAC/VDC, 24-48VDC
- AF0100-10: 24V to 48VDC
- 5ms (typical) trip time
- 10K to 25K lux programmable sensitivity
- Mounting: Surface, DIN rail
- Dimensions: 90mm x 128mm x 60mm
- Shipping weight: 1.0kg
- Certifications: UL Listed (UL 508), CE, RCM, FCC
Simplified Circuit Diagram
Additional Resources
Accessories
Accessories for this series include point sensors, fiber-optic sensors, and diode logic modules.
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Published: 2017-08-01
| Updated: 2022-04-14