DEHNguard® modular (Y)PV SCI ...
Multipole / single-pole PV Arresters with three-step d.c. Switching Device
- Prewired modular complete unit for use in photovoltaic systems consisting of a base part and plug-in protection modules
- Combined disconnection and short-circuiting device with safe electrical isolation in the protection module (patented SCI principle)
- Tried and tested fault-resistant Y circuit of DEHNguard M YPV SCI ... (FM) prevents damage to the surge protective device in case of insulation faults in the generator circuit
- Integrated d.c. fuse allows safe replacement of protection modules without arc formation
- Tested to EN 50539-11
- Suitable for use in all PV systems according to IEC 60364-7-712
DEHNguard M YPV SCI 600: For photovoltaic systems up to 600 V
DEHNguard M YPV SCI 1000: For photovoltaic systems up to 1000 V
DEHNguard M PV2 SCI 1000: For photovoltaic systems up to 1000 V; for protecting two MPP inputs
DEHNguard M YPV SCI 1200: For photovoltaic systems up to 1200 V
DEHNguard M YPV SCI ... FM: With remote signalling contact for monitoring device (floating changeover contact)
DEHNguard S PV SCI 150: For photovoltaic systems up to 150 V solidly earthed on the d.c. side
DEHNguard S PV SCI 600: For photovoltaic systems up to 600 V solidly earthed on the d.c. side
DEHNguard S PV SCI ... FM: With remote signalling contact for monitoring device (floating changeover contact)
The application features of the modular Red/Line family design are similarly unique as the three-step d.c. switching device. The module locking system firmly fixes the protection modules to the base part. Neither shock nor vibration nor the enormous forces of discharge affect the safe connection to the protection module. Nevertheless, the protection modules can be easily replaced without tools by simply pressing the easy-to-use module release button of the protection modules. Every protective path of DEHNguard modular (Y)PV SCI ... (FM) and every protection module is mechanically coded to ensure against installing the incorrect module.
To fulfil the special requirements in photovoltaic systems, a fault-resistant Y circuit consisting of three protective paths of the varistor and a combined disconnection and short-circuiting device are integrated in a single device.
This synergy reduces the probability of an arrester failure in case of the operating and fault states which have to be considered in photovoltaic systems. This ensures that the arrester is protected in case of overload. Even in case of voltages up to 1200 V d.c., a switching arc, which is likely to occur in the surge protective device if a conventional disconnector (for a.c. application) is activated, is extinguished immediately without risk.
A fuse particularly developed for photovoltaic systems is integrated in the short-circuit path. This ensures safe electrical isolation in case of a faulty protection module, allowing de-energised replacement of the protection module without arc formation. This innovative and unique design, DEHNguard modular (Y)PV SCI ... (FM) can be used in all low, medium and high-performance photovoltaic systems with no need for an additional backup fuse.
DG S PV SCI ... (FM) arresters are specifically designed for PV systems solidly earthed on the d.c. side. Since either the positive or the negative pole of the PV generator is solidly earthed, the space-saving and thus cost-effective DG S PV SCI ... (FM) arresters can be used where one protection module has been removed from the Y circuit.
The green and red indicator flags show the availability of every protective circuit. Apart from this visual indication, DEHNguard (Y)PV SCI ... (FM) arresters also feature a three-pole remote signalling terminal. With its floating changeover contact, the remote signal can be used as make or break contact according to the particular circuit concept. As with all surge arresters of the modular DEHNguard modular family, DEHNguard modular (Y)PV SCI ... (FM) arresters incorporate multifunctional terminals on a standardised spacing of 1 module for connecting conductors and busbars, allowing easy wiring with other DIN rail mounted devices.