QFire BIG for large and rooftop installations
The QFire BIG box is suitable for individual standard installation or also project-specific for a customised application. We take into account other customer-specific requirements and thus also offer the easiest to install variant for retrofitting existing PV systems. All individual requirements are taken into account. QFire BIG is independent of the manufacturer of the modules or inverters, can be equipped with overvoltage protectors and is supplied in a high-quality plastic or metal housing, as desired.
- safe disconnection of the PV generator even in case of emergency
- complete set; modularly expandable as well as very easy installation
- suitable for retrofitting
- AC coupled, it can therefore be triggered at any time via the mains
- automatically switches back on after a power failure
- arc-free switching due to modern switching technology
- control box can be switched on and off by an external key switch
- status can be transmitted to the signalling point via a potential-free contact
QFire BIG fireman's switch + overvoltage protection also for fire alarm systems
The central emergency shutdown for PV systems is suitable for fire alarm systems and can be connected to the central fire alarm.
The system can be switched off via an external switch.
QFire BIG 16-String Cut-Off with Integrated Slave Controlbox |
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| Number of strings | |
| Extension | |
| IP class (plastic | metal) | |
| Mounting location | |
| Max. system voltage per string | |
| Max. string current (Isc) | |
| Temperature range operation | |
| Connection AC side | |
| DC Connection | |
| Switching method | |
| Control voltage | |
| Monitoring | |
| External switch | |
| Housing dimensions control box (L x W x H, without plug) | |
| Housing dimensions switch box (plastic | metal) | |
| Weight of control box | |
| Weight of switch box (plastic | metal) | |
| Standards | |
| Area of application |
central emergency switch-off for PV systems, customised variants adapted to the respective system
suitable for fire alarm systems, can be connected to the central fire alarm
suitable for all modules/inverters, regardless of the manufacturer
plastic or metal housing, with or without overvoltage arrester
safe disconnection of the PV generator even in case of emergency
arc-free switching due to modern switching technology
complete set; modularly expandable as well as easy installation
control box can be switched on and off by means of an external key switch
AC coupled, it can therefore be triggered at any time via the mains
status can be transmitted to the signalling point via a potential-free contact
switches on again automatically after a power failure
In this case, we equipped an industrial building with a 1 MW rooftop system (128 strings) with generator isolation and overvoltage protection. The QFire BIG switch boxes also contain T2 surge arresters. A T1+T2 combination arrester would also be possible here. Each of these BIG switch boxes switches up to 16 strings.
