PROJOY MC4 fire fuse PEFS-EL50H-6 (for 3 strings)

In most PV systems, DC isolation switches are integrated
with PV inverters. But even when the DC switch between
the inverter and the photovoltaic panels has been turned off, it will be oscillating at 600 ~ 1500
VDC. In the event of a fire, firefighters can be exposed to very serious
potential hazards. But if the firefighters switched off the AC before addressing
the fire, the PEFS series safety switch will detect a network failure,
and after 5 seconds, PEFS will automatically turn off the isolation switch. Since this
safety switch is mounted close to the photovoltaic panel, the direct
current in the building is disconnected, providing for a safe environment for firefighters,
reducing potential damage and ensuring the safety of the
photovoltaic system.

1. FIND THE RIGHT TIME TO EXTINGUISH FIRE
The PEFS series firefighter safety switch complies with
the international standard working procedure for firefighters. In the event of a fire,
once the AC circuit has been switched off, the quick shutdown switch will
automatically shuts down and isolates the photovoltaic panels, so that
firefighters can eliminate the risk of high voltage PV panels
on the roof and gain valuable time to handle the accident.

2. PV PANELS ONLY
The PEFS series uses the PEDS switch and can be used directly
with PV panel. In the event of a fire, the
firefighter safety switch can quickly shut down the photovoltaic system, without the risk of high DC
voltage. If you want the entire roof to reach an even lower DC
voltage (for instance below 80 V ~ 120 V), multiple
safety switches (one for every 2-3 panels) can be used to ensure maximum
safety.

3. RESET AUTOMATICALLY
The Projoy PEFS series firefighter safety switch resets
automatically. When AC power is switched off (for instance during a
power outage), the PEFS series will reset
and connect the circuit quickly and automatically. You do not need to
reset it manually each time.

4. NO ADDITIONAL NETWORK REQUIRED AND MORE STABLE
ON-OFF CAPACITY
As compared to ordinary high-speed isolation devices
relying on remote communication technology on the market, the
firefighter safety switch of PEF Projoy series is directly controlled
by an AC circuit that does not require an additional network. It simply
relies on the existing AC power system. Furthermore, the PEFS does not
perform the on/off function via electronic components, but
through an isolation switch with arc extinction function, which disconnects the
DC circuit directly with much greater stability.

5. EXTEND THE LIFE CYCLE OF PV INVERTERS
When Projoy's PEFS product is installed on the system, in the event that
the AC circuit in non-live, for example during an interruption
of the power supply, power line maintenance or grid failure, the
direct current circuit will automatically be switched off. This will significantly extend
the life of PV inverters and make it safer to repair or
replace them.

6.USE POPULAR DC SWITCHES
The PEFS series from Projoy features the PEDS switch, which is
the world's most popular DC switch for
photovoltaic applications. The response time of Projoy's elastic recoil mechanism
is only 5 milliseconds, which can quickly extinguish the arc. In combination with self-cleaning
contacts, the switches have increased durability
and safety. For this reason, PEDS has been a choice for many
PV inverter manufacturers as the preferred DC switch.

7. AS A PROFESSIONAL DC SWITCH PRODUCER,
Projoy boasts extensive experience in DC switch design
and worldwide customer base. Projoy has become the first company in China
developing physical insulation with DC arc extinguishing capabilities
without the use of remote communication technology, effectively
ensuring the safety of high DC voltage roofs.

NOTE: The switch housing must not be placed in direct sunlight or in direct
contact with (continuous) penetrating water.