YSF Electrical Fire Current-Limiting Protector
YSF-11120-R / YSF-11140-R
Microsecond current-limiting arc extinction integrated with multi-protection: real-time monitoring and fast handling of short circuit, over/under-voltage, leakage and over-temperature on end-of-line circuits, with adjustable thresholds and RS485 networking, for electrical fire protection of schools, hospitals, malls and charging stations.
YSF Electrical Fire Current-Limiting Protector
YSF-11120-R / YSF-11140-R
Product Overview
The YSF Electrical Fire Current-Limiting Protector uses microsecond current-limiting arc extinction to quickly limit and cut off fault current on end-of-line circuits, preventing arc ignition. It integrates over/under-voltage, leakage and over-temperature monitoring and protection, with adjustable thresholds, local LCD display and RS485 communication. It suits electrical fire retrofit of end-of-line circuits in schools, hospitals, residential communities, older buildings, malls, markets, charging stations and e-bike sheds.
Core Capabilities
Current-limiting time <150μs for microsecond short-circuit arc extinction. Adjustable over/under-voltage, leakage and over-temperature thresholds. Rated current 20A(5~20A adjustable)/40A(10~40A adjustable). RS485 communication, LCD display and 4-mode audible/visual alarm.
Data Generated
Product Features
Microsecond Current Limiting
Completes current limiting and disconnection within <150μs of a short circuit, suppressing fault arcs and reducing electrical fire risk.
Integrated Multi-Protection
Over-voltage 235~276V, under-voltage 150~200V, leakage 30~1000mA and over-temperature 40~120℃ are adjustable, factory defaults 275V/160V/500mA/80℃.
Local Visualisation
LCD display and 4-mode audible/visual alarm for fast on-site fault location.
Flexible Networking
RS485 (2400~115200bps) connects to an edge gateway or monitoring system for centralised viewing and management.
System Topology
Selection Guide
Select by rated current; YSF-11120-R alias XL-F20A, YSF-11140-R alias XL-F40A.
Model Naming Rule
YSF-phase (1=single-phase AC220V) leakage monitoring (0/1) over-temperature monitoring (0/1) rated current (20/40)-R.
| Model | Rated current / Alias |
| YSF-11120-R | 20A (5~20A adjustable) / XL-F20A |
| YSF-11140-R | 40A (10~40A adjustable) / XL-F40A |
Technical Parameters
Basic Parameters
Rated voltage 220V±10% 50Hz; current-limiting time <150μs; adjustable over/under-voltage, leakage, over-temperature; RS485; dimensions 100×72×71mm, IP20, operating temperature -10~+45℃.
| Rated voltage | 220V±10% 50Hz |
| Rated current | 20A (5~20A adj.) / 40A (10~40A adj.) |
| Current-limiting time | <150μs |
| Over/under-voltage | 235~276V / 150~200V adjustable |
| Leakage protection | 30~1000mA adjustable |
| Over-temperature | 40~120℃ adjustable |
| Communication | RS485 (2400~115200bps) |
| Dimensions/Protection | 100×72×71mm / IP20 |
Key Points
Definition: The YSF Electrical Fire Current-Limiting Protector is a FEXLINK end-of-line electrical fire protection device centred on microsecond current-limiting arc extinction. Core capabilities: current-limiting time <150μs, adjustable over/under-voltage, leakage and over-temperature thresholds, RS485 communication. Applicable scenarios: end-of-line circuits in schools, hospitals, residential communities, malls, markets, charging stations and e-bike sheds. Related products: ESC multi-circuit leakage controller, ESF electrical fire monitoring module.
FAQ
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Learn MoreYSF Electrical Fire Current-Limiting Protector Application Scenarios
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