DGV Type 1et2 Surge Arrester One pole

Family : Surge protection
Category : Surge protection devices for low voltage power equipment

Application
The DGV is a modular Type 1 AC Surge Protection Device (SPD) dedicated to protect sensitive
equipment against over voltage which may occur in the AC network during a storm (lightning) or during
switching electric power sources (industrial interferences).
The DGV is a one-pole SPD and can be used in common mode (DGV connected between L/PE and
N/PE = CT1 configuration) or common and differential mode (DGV connected between L/N and
1xDE 400 between N/PE = CT2 configuration).
Protection is based on specific heavy duty Gas tube and high energy varistor block which is able to
channel currents of up to 40 kA to earth without incurring damage. According to the latest issue of
IEC 62 305 and IEC 60 364 standards, it is compulsory to install those surge arresters on the incoming power supply if the building is fitted with external lightning protection system. Multiple stage protection can be achieved using DGV surge arresters at the network entrance combined with DGT or DGX surge arresters positioned as close as possible to sensitive equipments.

Installation

• Positioning:
  The DGV surge arrester is used as primary protection for 1 or 3-phase AC networks which are particularly exposed (Type 1 surge arrester). It is therefore installed on the site’s main low voltage switchboard.
• Mounting:
  The DGV surge arrester is DIN rail compatible and is featured with a double terminal for line wire to allow improved connection to the AC network.
• Wiring:
  Connection cables between SPD and the lines to be protected must be identical in cross sectional area to the lines with a maximum of 35mm². The cross-sectional earthing cable must equal half that of the main protection cable of the installation with a minimum of 6 mm² and a maximum of 35 mm².
  If external lightning protection system is fitted, the minimum cross-sectional area will be 10 mm².

Service continuity, failure indicator

Service continuity of the DGV is provided by an internal thermal security which disconnects the SPD from the AC network in case of failure. In such case, the user will be warned by an indicator in front of the SPD.
The DGU is also equipped with remote signalling contact.
To comply with the standards, an external electrical disconnection is necessary. The user must install on
each SPD branch, a protection against short-circuit current (fuses or breaker). The rating of this fuse must
be 100A or in relation with the short-circuit current of the installation.

 

Description	Ref.	Dimensions (m)	Weight (kg)
DGV 400 Overvoltage arrester	8312E	0,09 x 0,067
DGV 230 Overvoltage arrester	8313E	0,09 x 0,067
DGV 120 Overvoltage arrester	8314E	0,09 x 0,067