DEHN DEHNguard DG M TT 2P 275 Type 2 Surge Protection Device, 2 Module Single Phase TT/TN
- Brand:
- DEHN
- Part number:
- 952110
- EAN:
- 4013364108417
Two-module Type 2 surge arrester for TT and TN installations at single phase, using a 1+1 circuit with an N-PE spark gap. Prewired base part with pluggable protection modules.
- Type 2 protection, single-phase TT and TN
- 1+1 circuit with N-PE spark gap
- In 20kA, Imax 40kA, UP 1.25kV
- Two DIN modules, pluggable
- Prewired complete unit
Out of stock
UK delivery £9.95 ex VAT, free on orders of £100 ex VAT or more; usually 2-3 working days.
Minimum order £50 ex VAT. All prices exclude VAT, which is added at checkout.
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Specifications
Electrical
| Supply | Single phase |
|---|---|
| Earthing system | TT, TN-S, TN-C-S (PME) |
| Earthing system (as supplied) | TT/TN |
| Remote signalling contact | No |
| Application | Mains AC |
Protection
| SPD type | Type 2 |
|---|---|
| Nominal discharge current (In) | 20 kA |
| Max discharge current (Imax) | 40 kA |
| Voltage protection level (Up) | 1.25 kV |
Dimensions
| DIN rail width | 2 modules |
|---|
Construction
| Replaceable protection module | Yes |
|---|
Fit
| Mounting | DIN rail |
|---|
Identification
| Brand | DEHN |
|---|---|
| Part number | 952110 |
| EAN | 4013364108417 |
| Range | DEHNguard |
More technical data
| Manufacturer | DEHN (DEHNguard modular, type DG M TT 2P 275) |
|---|---|
| SPD class | Type 2 to EN 61643-11 / Class II to IEC 61643-1 |
| Nominal a.c. voltage (UN) | 230V; UC 275V (L-N), 255V (N-PE) |
| Nominal discharge current In (8/20) | 20kA; max discharge current Imax: 40kA |
| Lightning impulse current N-PE (10/350) Iimp | 12kA |
| Voltage protection level UP | 1.25kV (L-N), 1.5kV (N-PE); 1kV at 5kA |
| Follow current extinguishing capability N-PE | 100Arms; response time 25ns (L-N) |
- Width 2 modules (DIN 43880), IP20, 35mm DIN rail to EN 60715, -40 to +80C
Product details
TT installations need a different arrester topology to TN, because the neutral-to-earth path has to be bridged by a spark gap rather than a varistor. The DEHNguard DG M TT 2P 275 uses that 1+1 arrangement in two DIN modules, giving single-phase TT and TN boards full Type 2 protection with a 12kA lightning impulse rating on the N-PE path.
Key features
- 1+1 circuit with an N-PE spark gap, suitable for single-phase TT as well as TN systems
- Prewired complete unit - the base part arrives ready to land on incoming conductors
- Pluggable protection modules, replaced individually without disturbing terminations
- Thermo Dynamic Control monitoring for safe disconnection of a failing varistor
- Follow current extinguishing capability of 100Arms on the N-PE path
Typical applications
Fit it at the origin or the main distribution board of single-phase installations with a TT earth - rural and agricultural properties, sites on their own earth electrode, park homes and caravan sites, temporary building supplies, and marina and outbuilding boards. The same unit works on TN systems, so it suits contractors who want one arrester that covers both earthing arrangements.
Compliance
Tested as a Type 2 device to EN 61643-11 and Class II to IEC 61643-1, with KEMA, VDE, UL and VdS approvals and a UL 94 V-0 enclosure rated IP20. BS 7671 requires the risk from transient overvoltages to be assessed and coordinated surge protection provided where the consequences justify it.
Order today for fast UK dispatch on genuine DEHN surge protection at trade-direct prices.
