DC Combiner Box 9 Strings 1000V 20A Breakers with Shunt Trip IP66
IP66 fiberglass DC field box for 9 strings at 1000 V, 20 A. DC breakers with shunt trip coil for remote or emergency tripping, 72-module box with transparent door. For commercial arrays.
The QDC-09/09 DC field box combines, protects and controls nine PV strings up to 1000 V DC, with 9 inputs and 9 outputs at 20 A. Unlike boxes with a plain isolator, each string is protected by a DC circuit breaker fitted with a shunt trip coil: it opens the circuit both manually and remotely, on an external command. It is the solution for commercial and larger arrays.
Breaker with shunt trip: remote opening too
An isolator opens only by hand, on site. The circuit breaker in this box instead trips automatically on overcurrent and, thanks to its shunt trip coil (110-415 V), can be opened remotely – wired to an emergency stop, a rapid-shutdown system or a fire alarm. A 1P+N fuse holder with a 6 A fuse protects the coils' auxiliary circuit.
| Strings | 9 (9 IN / 9 OUT) |
| Max voltage | 1000 V DC |
| Current per string | 20 A |
| Protection | 4-pole DC breaker + shunt trip coil 110-415 V |
| Enclosure | fiberglass IP66, transparent door, 72 modules |
| Weight | 5 kg |
Why a fiberglass IP66 box
The thermoset fiberglass enclosure rated IP66 resists UV, weather and aggressive environments better than a standard plastic box, and suits prolonged outdoor installation. The transparent door lets you read the breaker status without opening the box.
FAQ
What is the difference between this box (INT) and one with an isolator (SEZ)?
An isolator only allows manual disconnection under load. The circuit breaker also protects against overcurrent and, with the shunt trip coil, allows remote or automatic opening on an external signal.
What is the shunt trip coil for?
It lets the breaker be opened remotely by an electrical signal: it is how you integrate the box with an emergency stop, a module-level rapid-shutdown system or a fire-detection system.
Does installation require a qualified technician?
Yes. Installation, wiring of the shunt trip coils and connection to the PV system must be carried out by a qualified installer, in compliance with the applicable standards (including CEI 0-21/0-16 and EN IEC 62548).