Protective equipment
in category: Protective equipment
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Protective equipment for AC and PV electrical installations
Protective equipment covers the devices that protect circuits, equipment and people in AC and photovoltaic installations. It includes circuit breakers, residual current devices, surge protectors, isolators and fuses. The range is aimed at installers and electrical contractors who need DIN rail devices for distribution boards and PV systems.
What you will find in this category
- Miniature circuit breakers and motor switches - overcurrent protection in 1P to 4P versions, mostly with B or C characteristic.
- Residual current devices (RCD) - protection against electric shock, in type AC and type A.
- Surge Protectors - Type 1+2 and Type 2 devices for AC and DC photovoltaic circuits.
- Isolator switches - safe disconnection of circuits, including 4-pole 1000V DC isolators for PV.
- Fuses and fuse holders - 10x38 mm gPV fuse links and fuse bases for DC circuits.
- Fire Protection - fire safety DC switches for PV that cut power automatically on AC grid failure.
How to choose
- Application: select AC (mains) or DC (photovoltaic) versions. Voltages range from 230V AC to 1100V DC.
- Rated current: available from 6A to 100A. Match it to the cable and the load.
- Number of poles: choose 1P, 2P, 3P or 4P, or versions with neutral (1P+N, 3P+N, 2P+N).
- Trip characteristic: B or C for circuit breakers. For RCDs, check type AC or A and the residual current rating.
- Breaking capacity: most devices are rated 6 kA, a few 10 kA.
Typical applications
The devices are used in domestic and industrial distribution boards and in photovoltaic systems. Miniature circuit breakers protect AC circuits against overload and short circuit. DC fuse bases, isolators and surge protectors protect the DC side of PV installations. Class II surge protectors are typically installed at main and sub-distribution panels.
Frequently asked questions
Where should Class II surge protectors be installed?
According to the product description, Class II devices are typically installed at main and sub-distribution panels. They can be installed several times along the cable run, every 10-20 metres of cable length.
Can miniature circuit breakers be fitted with accessories?
Yes, for the Ex9BN series. Up to three auxiliary or alarm contact modules and up to two release modules can be used. Additional RCD blocks are also possible.
Not sure which device suits your circuit? Ask our technical support team for help with selection.