BENY BFS-S Series Firefighter Safety Switch for Solar Buildings
Model: BFS-S Series
Website: www.beny.com
Application
The BENY BFS-S Series Firefighter Safety Switch is a DC Isolation Solution designed for solar rooftop fire safety. It provides mechanical and complete DC power isolation in the event of a fault, creating a safe area and operating space to protect firefighters from DC electric shock. When a firefighter cuts off the AC power in the house, the safety switch simultaneously disconnects the DC power.
Key Features:
- String Level Rapid Shutdown
- Up to 1500VDC, 50A per string
- Plug and Play for easy installation
- No cross-talk with inverter or Wifi
- Compatible with most string inverters and panels
Product Features
- IP66 Aluminum enclosure with breathing valve ? IP66
- U1508i listed and IEC PV2 DC switch built-in
- Genuine MC4 Plug and Play connectors
- Optional protection cover for rooftop installation
Specifications
| Models | BFS-S1 | BFS-S2 | BFS-S3 | BFS-S4 |
|---|---|---|---|---|
| Number of Strings | 1 string | 2 strings | 3 strings | 4 strings |
| Max String Voltage(Vdc) | 300V-1500V | |||
| Max String Current(A) | 50A | |||
| Operating Voltage | 90Vac-260Vac | |||
| Nominal Voltage | 230Vac | |||
| Nominal Current | 30mA | |||
| Start up Current | average 100mA | |||
| Switch on Action Current | Max 300mA | |||
| Standard Compliance | IEC / EN 60947-3 | |||
| Protection Degree | IP66 | |||
| Storage Temperature Allowed Between | -40°C~+85°C | |||
| Operating Temperature Range | -20°C~+50°C | |||
| Maximum Operating Temperature Before Automatic Switch OFF | +85°C | |||
| Protection Level | Class II | |||
| Mechanical Endurance | 9700 | |||
| Electrical Endurance | 300 | |||
System Diagram
The system diagram illustrates the connection of solar PV strings to the BENY BFS-S safety switch. Four solar strings are shown, each connected via DC cables to the BFS-S unit. The BFS-S unit then connects to an Inverter and an AC Distribution Box using AC cables. The diagram clearly labels DC cables and AC cables.
How the Solution Works
The BFS-S series switch ensures safety through multiple shutdown modes:
Automatic Shutdown When Over Temperature
The DC power is automatically turned OFF if the temperature inside the BFS-S enclosure reaches or exceeds 85°C (?️ 85°C). Power is automatically restored once the temperature drops to 75°C or below.
Automatic Shutdown When AC Power Loss
The DC power is automatically turned OFF if the AC power is lost, either accidentally or when manually shut down by firefighters. This action creates a safe zone. DC power is automatically restored when AC power is back.
100% Shutdown By Emergency Button
Pressing the emergency button on the BFS-S unit ensures the DC power remains 100% OFF, even after AC power is restored. This provides a permanent safety zone for firefighters.
Dimensions
BFS-S Series Fire Safety Switch
The main unit dimensions are approximately 212.9mm (length) ±0.5mm x 270mm (width) x 104.2mm (depth) ±0.5mm. Mounting hole dimensions are also provided in the original diagram.
BFS-S Protection Cover for Fire Safety Switch
The protection cover dimensions are approximately 380mm ±0.5mm (length) x 210.5mm ±0.5mm (width) x 110mm (depth).
Manufacturer Information
ZHEJIANG BENYI ELECTRICAL CO., LTD.
Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Beibaixiang Town, Yueqing, Wenzhou City, Zhejiang Province, China, 325600
TEL: +86-577-5717 7008
Email: benyi@zjbeny.com
Version: 20221118
For the latest version of specifications, please refer to www.beny.com or contact the company.
Note: ZHEJIANG BENYI ELECTRICAL CO., LTD. reserves the right to explain the terms of specification.
