DEHN Combined Type 1+2 Surge Protection Device, 4 Module Single Phase TN
- Brand:
- DEHN
- Part number:
- 951200
- EAN:
- 4013364124035
Four-module Type 1+2 arrester for TN installations at single phase, fitted at the origin to handle partial lightning currents and switching surges.
- Combined Type 1+2 protection
- Single-phase TN configuration
- Four DIN modules
- Origin-of-installation device
3 in 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 | TN-S, TN-C-S (PME) |
| Earthing system (as supplied) | TN |
| Remote signalling contact | No |
| Application | Mains AC |
Protection
| SPD type | Type 1+2 |
|---|
Dimensions
| DIN rail width | 4 modules |
|---|
Construction
| Replaceable protection module | Yes |
|---|
Fit
| Mounting | DIN rail |
|---|
Identification
| Brand | DEHN |
|---|---|
| Part number | 951200 |
| EAN | 4013364124035 |
| Range | DEHNventil |
More technical data
| SPD class | combined Type 1 and Type 2 |
|---|---|
| Configuration | single phase (SPN), TN earthing system |
| Width | 4 DIN modules |
| Format | modular arrester with pluggable protection modules |
Product details
A combined Type 1 and Type 2 arrester does two jobs in one set of modules: it takes the partial lightning current that a direct strike puts into an installation, and it limits the ordinary switching and induced surges that follow. This four-module DEHN unit does both for single-phase TN supplies.
Key features
- Combined Type 1 and Type 2 duty in a single four-module arrester
- Configured for single-phase TN systems with line and neutral protection
- Fitted at the origin of the installation, upstream of the distribution boards
- Modular construction allows individual protection modules to be replaced
- Removes the need for separate Type 1 and Type 2 devices in a small board
Typical applications
Specify it at intake positions where partial lightning current is a credible risk: buildings with an external lightning protection system, properties fed by overhead lines, exposed rural and coastal sites, agricultural buildings, and single-phase industrial or telemetry supplies. A Type 2 device further downstream then handles the distribution boards themselves.
Compliance
Combined Type 1 and Type 2 devices are classified under the BS EN 61643-11 series and are installed at the origin of the installation. BS 7671 requires the risk from transient overvoltages to be assessed, with Type 1 protection used where partial lightning current may enter the installation and coordinated Type 2 protection downstream.
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