Page 89 - Surge-Protection-E_0.pdf

Surge Arresters – Type 2 for PV Systems

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 sys-
tems 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
• Tested to EN 50539-11
• Suitable for use in all PV systems according to IEC 60364-7-712

For protecting low-voltage consumer installations against surges. For use in accord-
ance with IEC 60364-7-712 (photovoltaic (PV) power systems).

DEHNguard M YPV SCI 150: Modular multipole surge arrester with three-step d.c. switching device; for photovoltaic systems up to 150 V
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 modular DEHNguard modular (Y)PV SCI ... (FM) surge arresters are DG S PV SCI ... (FM) arresters are specifically designed for PV systems
specifically designed for protecting equipment in photovoltaic systems. solidly earthed on the d.c. side. Since either the positive or the negative
The patented three-step d.c. switching device (SCI principle) makes these pole of the PV generator is solidly earthed, the space-saving and thus
arresters especially safe so that they fulfil the requirements in modern cost-effective DG S PV SCI ... (FM) arresters can be used where one pro-
photovoltaic systems. The devices are available for 150 V, 600 V, 1000 V tection module has been removed from the Y circuit.
and 1200 V applications. DEHNguard ME YPV SCI 1500 (FM) – a 1500 V The green and red indicator flags show the availability of every protective
version – covers the most common voltage levels. DEHNguard M PV2 SCI circuit. Apart from this visual indication, DEHNguard (Y)PV SCI ... (FM)
... also provides protection for 2 MPP inputs in a single device. arresters also feature a three-pole remote signalling terminal. As the re-
The application features of the modular Red/Line family design are as mote signalling contact is designed as a floating changeover contact, the
unique as the three-step d.c. switching device. The module locking system remote signal can, depending on the circuit concept, be used as a make
firmly fixes the protection modules to the base part. Neither shock nor or break contact. As with all surge arresters of the modular DEHNguard
vibration nor the enormous forces of discharge affect the safe connection modular family, DEHNguard modular (Y)PV SCI ... (FM) arresters incorpo-
to the protection module. Nevertheless, the protection modules can be rate multifunctional terminals on a standardised spacing of 1 module for
easily replaced without tools by simply pressing the easy-to-use module connecting conductors and busbars, allowing easy wiring with other DIN
release button of the protection modules. Every protective path of rail mounted devices.
DEHNguard modular (Y)PV SCI ... (FM) and every protection module is Surge Arresters – Type 2
mechanically coded to guard against installing the incorrect module. Switching stages
To fulfil the special requirements in photovoltaic systems, a fault-resistant 1. 2. 3.
Y circuit consisting of three protective paths of the varistor and a com- Tripping of the Active Safe
bined disconnection and short-circuiting device are integrated in a single Original disconnection arc electrical
state
device
extinction
isolation
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. applications) is activated, is extinguished immediately without risk. SCI SCI SCI SCI
Three-step d.c. switching device (patented SCI principle)

Valid as of August 1, 2020 You will find detailed product information on our website 85