Page 92 - Surge-Protection-E_0.pdf

Surge Arresters – Type 2 for PV Systems

DEHNguard modular E (Y)PV SCI 1500
Multipole / single-pole PV arresters with three-step
d.c. switching device
• Prewired modular complete unit for use in photovoltaic
systems up to 1500 V 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)
• New design for safe use in PV systems up to 1500 V
• Tested to EN 50539-11
• Suitable for use in all PV systems in accordance with
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 ME YPV SCI 1500: Modular multipole surge arrester with three-step d.c. switching device for PV systems up to 1500 V
DEHNguard SE PV SCI 1500: For PV systems up to 1500 V solidly earthed on the d.c. side
DEHNguard ME/SE (Y)PV SCI 1500 FM: With remote signalling contact for monitoring device (floating changeover contact)

The modular DEHNguard ME YPV SCI 1500 (FM) and DEHNguard SE PV DEHNguard SE PV SCI 1500 (FM) arresters are specifically designed for PV
SCI 1500 (FM) surge arresters are specifically designed for protecting systems solidly earthed on the d.c. side; this type of earthing is meanwhile
equipment in photovoltaic systems up to 1500 V. The new design of these required, e.g. by manufacturers of special thin-film modules or for legal or
arresters of the DEHNguard … SCI family meets the increased require- normative reasons in some regions.
ments regarding such a high voltage range; this is reflected in the in- Since either the positive or the negative pole of the PV generator is solid-
creased width (1.5 modules), additional terminal covers and a special ly earthed, the optimised DEHNguard SE PV SCI 1500 (FM) arresters (one
terminal slot. The patented three-step d.c. switching device (SCI principle) protection module is removed from the Y circuit) may be used if the dis-
makes these arresters particularly safe so that they fulfil all requirements tance from the earthing point does not exceed 5 m.
in modern photovoltaic systems. The devices are specifically designed for
PV systems with high system voltages (up to 1500 V). As with DEHNguard The green and red indicator flags show the availability of every protective
modular (Y)PV SCI … (FM) arresters, which are available as 150 V, 600 V, circuit. Apart from this visual indication, DEHNguard ME YPV SCI 1500 FM
1000 V and 1200 V versions, they cover the most common voltage levels. und DEHNguard SE PV SCI 1500 FM arresters also feature a three-pole
remote signalling terminal. As the remote signalling contact is designed
The application features of the modular Red/Line family design are as as a floating changeover contact, the remote signal can, depending on the
unique as the three-step d.c. switching device. The module locking system circuit concept, be used as a make or break contact.
firmly fixes the protection modules to the base part. Neither shock nor
Surge Arresters – Type 2 to the protection module. Nevertheless, the protection modules can be Switching stages 2. 3.
vibration nor the enormous forces of discharge affect the safe connection
easily replaced without tools by simply pressing the easy-to-use module
release button of the protection modules. Every protective path of
1.
DEHNguard modular E (Y)PV SCI 1500 (FM) and every protection module
Original
electrical
arc
disconnection
is mechanically coded to guard against installing the incorrect module.
isolation
state Tripping of the Active Safe
device
extinction
To fulfil the special requirements in photovoltaic systems, a fault-resistant
Y circuit consisting of three protective paths of the varistor and a com-
bined disconnection and short-circuiting device are integrated in a single
device.
This synergy further reduces the probability of an arrester failure in case
of the operating and fault states which have to be considered in photo-
voltaic systems. This ensures that the arrester is protected in case of over- SCI SCI SCI SCI
load. Even in case of operating voltages up to 1500 V d.c., a switching arc,
which is likely to occur when a conventional disconnector (for a.c. appli-
cations) of a surge protective device is triggered, is extinguished immedi- Three-step d.c. switching device (patented SCI principle)
ately without risk.

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