DGX Type 2 or Type 3 Surge Arrester
Family :
Surge protection
Category :
Surge protection devices for low voltage power equipment
Application
The DGX is a modular Type 2 (or type 3) 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 DGX is a one-pole SPD and can be used in common mode (DGX connected between L/PE and
N/PE = CT1 configuration) or common and differential mode (DGX connected between L/N and 1xDGE
between N/PE = CT2 configuration).
Protection is based on high energy varistor which is able to channel currents of up to 10 kA to earth
without incurring damage. DGX surge arresters are mainly used combined with Type 1 surge arresters
at the AC network entrance and possibly Type 2 surge arresters (DGT) positioned upcircuit distribution
panel.
The DGX is built with a plug-in module and a fixed base, which allows an easy and fast maintenance.
Installation
- Positioning:
The DGX surge arrester can be used as secondary type 2 or type 3 protection for 1 or 3-phase AC
networks. It is therefore installed as close as possible to the equipment to be protected. - Mounting:
The DGX surge arrester is DIN rail compatible. - 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 25mm². The cross-sectional earthing cable must equal half that
of the main protection cable of the installation with a minimum of 4 mm² and a maximum of 25 mm².
If external lightning protection system is fitted, the minimum cross-sectional area will be 10 mm².
Service continuity, malfunction indicatorService continuity of the DGX is provided by an internal thermal security, connected in series with the
varistor, 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. Version with remote signalling contact for disconnection
indication is also available ( DGX…S).
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 20 A or in relation with the short-circuit current of the installation.
| Description | Ref. | Dimensions (m) | Weight (kg) |
|---|
| Replacement Plug-in Module DGX 400S | P8450E | 0,05 x 0,045 | 0,036 |
| Replacement Plug-in Module DGX 230S | P8451 | 0,05 x 0,045 | 0,032 |
| Replacement Plug-in Module DGX 120S | P8452 | 0,05 x 0,045 | 0,028 |
| DGX 400S Overvoltage arrester | P8436E | 0,09 x 0,067 | 0,104 |
| DGX 230S Overvoltage arrester | P8437E | 0,09 x 0,067 | 0,100 |
| DGX 120S Overvoltage arrester | P8438E | 0,09 x 0,067 | 0,098 |
| DGX 400 Overvoltage arrester | P8406E | 0,09*0,065 | 0,098 |
| DGX 230 Overvoltage arrester | P8400E | 0,09 x 0,067 | 0,084 |
| DGX 120 Overvoltage arrester | P8401E | 0,09 x 0,067 | 0,098 |