Datasheet

Max

Safety for firefighters

The Eaton fireman's switch is installed at or shortly after the entry of the DC

string lines into the building

햲

. The fireman's switch opens automatically with

the aid of its built-in undervoltage release

햳

when the firefighters isolate the

fire location from mains power through the public utility and/or at the PV Off

switch

햴

Tripping of the fireman's switch isolates the DC lines between PV modules and

inverter

햵

This protects emergency personnel from both direct contact with live

cables and indirect contact, for example through flooding.

Tripping is indicated through a signal lamp connected to the feedback contacts,

provided power is present

햶

Simple PV fireman's switch

For smaller photovoltaic installations with one or two identical strings the

simplest version of Eaton’s proven fireman's switch is the ideal choice. With a

current carrying capacity of 30 A at 1000 V DC this device is capable of reliably

switching all popular module models.

And if the inverter does not contain a built-in switch-disconnector,

the SOL30-SAFETY can fulfil this task according to VDE 0100-712.

Multi-way fireman's switch

If a photovoltaic installation consists of several strings – which is the case in all

larger systems – the new versions of the fireman’s switch with 2, 3, 4 or 6

inputs are the most efficient solution. Each string is routed through its own

switch-disconnector and then on to the inverter. This is particularly interesting

for plants whose strings have different characteristics or are exposed to differ-

ing shade ratios. Smaller inverters with several MPP trackers are often used

here.