Increased Safety for Switchgear Cabinets - dehn-africa.com · Technical data SPD nach EN 61643-11...

Increased Safety for Switchgear Cabinets CI Arresters with Integrated Backup Fuse

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Conventional installation with external backup fuse and fuse monitoring

Fuse monitoring

Additional complex cable routing

External backup fuse

Considerable space saving

Integrated fuse monitoring

Integrated fuse

Innovative solution to save space in the switchgear cabinet

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2 2

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3

2

1

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Figure 1: Installation without separate arresterbackup fuse

Figure 2: Innovative solution withintegrated arrester backup fuse

consumer installation

consumer installation

Increases system availabilityThe target is to protect devices in an electrical installation from damage caused by lightning and surges. However, even in the event of a fault, there should be no unintentional interac-tion between the surge protective devices and the system. This can be achieved with the RADAX Flow spark gap technology of the DEHN arresters. Load on fuses, circuit breakers and oth-er system components is avoided by reducing the mains follow currents to a minimum. In conventional installations, the up-stream system fuse is often used as a backup fuse for the surge protective devices. In the event of a fault, there is a danger that the entire system may be disconnected (Figure 1).

Circuit Interruption Fuse Integrated (CI): The CI arresters by DEHN feature an integrat-ed backup fuse. In case of a fault, only the surge protective device is disconnected. This maintains system availability (Figure 2).

Saves spaceThe space in a switchgear cabinet is very limited. CI arresters from DEHN do not require an external backup fuse and con-sequently occupy up to 75 per cent less space. This is also an advantage for retrofits.

Reduces time and materialThe CI arresters from DEHN can be installed quickly and safely using only a small quantity of materials.

Optimum backup fuseThe specially developed fuse is coordinated with the product and ensures the best possible performance for the SPD.

Easy remote monitoringThe integrated fuse of the CI arresters from DEHN is automat-ically monitored. Monitoring external backup fuses entails much greater effort and expense.

Allows short cable lengthsAccording to the installation standard, the maximum cable length is limited to 0.5 m1). A considerable amount of the avail-able length is already taken up by the external backup fuse. This limits the installation possibilities. The CI arresters from DEHN allow you to keep cables shorter.

1) IEC 60364-5-53: Low-voltage electrical installations – Part 5-53 3

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• Spark-gap-based combined arrester with integrated backup fuse

• Energy coordination with other arresters in the Red/Line® series

• Low voltage protection level UP ≤ 1.5 kV (including backup fuse)

• RADAX Flow spark gap technology

• Extinction of mains follow currents up to 100 kArms

• High lightning current discharge capacity up to 25 kA (10/350 μs)

• Reliable protection of terminal equipment

• Green/red operating state/fault indication for the arrester and

backup fuse in the inspection window

100 kArms

Integrated backup fuse

RADAX Flowspark gap

Floating remotesignalling contact

DEHNvenCI: Type 1combined arrester withintegrated backup fuseThe DEHNvenCI combined arrester with its integrated backup fuse and RADAX Flow spark gap technology ensures maximum system availability and protection of terminal equipment. It stands out for its space-saving design and ease of use. The FM version of DEHNvenCI features a floating remote signalling contact.

Benefits of DEHNvenCI:• Integrated and monitored backup fuse• Durable and proven technology• Fast assessment of the operating state• Universal use in switchgear installations up to 100 kArms

• Can be used upstream of the meter panel• Suitable for all system configurations

Benefits of the integrated backup fuse:

• Maximum system availability• Low space requirement• Fast installation• Universal use• Integrated fuse monitoring• Short cable length

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Technical data

SPD nach EN 61643-11 Type 1

Maximum prospective short-circuitcurrent

100 kArms (220 kA peak)

Limitation/extinction of mains followcurrents

up to 100 kArms (220 kApeak)

Maximum continuous operating voltage AC UC

255 V

Lightning impulse current (10/350) Iimp 25 kA

Voltage protection level UP (beinhaltet 80 cm Anschlussleitung) ≤ 2.5 kV

Mains-side overcurrent protection Not required

Fuse monitoring Integrated

Type Version / system configuration

Part No.

DBM 1 255 S Single-pole 900 220

DEHNbloc® Maxi SType 1 arrester with integrated backup fuse

The leakage-current-free lightning current arrester withintegrated fuse can be directly mounted on power busbarsin industrial switchgear installations. This makes the arrest-er ideal for retrofitting.

The operating state of the arrester can be monitored bymeans of remote signalling.

Application:For switchgear assemblies up to 100 kArms (220 kApeak).

Technical data

SPD according to EN 61643-11 Type 1

Maximum prospective short-circuitcurrent

100 kArms (220 kA peak)

Limitation/extinction of mains followcurrents

up to 100 kArms (220 kApeak)


255 V


Voltage protection level UP ≤ 1.5 kV




Part No.

DVCI 1 255 Single-pole 961 200

DVCI 1 255 FM Single-pole 961 205

DEHNvenCIType 1 combined arrester with integrated backup fuse

The combined arrester for 230 V and 400 V can be used universally. It provides maximum system availability andprotection of terminal equipment.

The arrester with integrated fuse has a width of only twostandard DIN modules and can be installed on standardDIN rail systems.

Application:For switchgear assemblies up to 100 kArms (220 kApeak).

DEH

N S

PA

RK GAP TECHNOLOGY INSIDE

WAVE BREAKER FUNCTI

ON

WBF

100 kArms100 kArms

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DEHNbloc® Maxi CI 440Type 1 arrester with integrated backup fuse

The leakage-current-free arrester with RADAX Flow spark gap technology and a width of three standard DIN mod-ules has a high discharge capacity whilst taking up only a minimum amount of space. Due to the high TOV with-stand capability, DEHNbloc® Maxi CI 440 is also suitable for protecting IT systems. DEHNbloc® Maxi CI 440 is a DIN rail mounted device which can be fitted directly onto mounting plates using the mounting brackets supplied.

Application:For 400 / 690 V industrial feeders, chemical plants, wind turbines and PV systems.

DEHNbloc® Maxi CI 760Type 1 arrester with integrated backup fuse

The leakage-current-free arrester with RADAX Flow sparkgap technology and a width of three standard DIN moduleshas a high discharge capacity whilst taking up only a minimum amount of space. Due to the high TOV with-stand capability, DEHNbloc® Maxi CI 760 is also suitable for protecting IT systems. DEHNbloc® Maxi CI 760 is a DIN rail mounted device which can be fitted directly onto mounting plates using the mounting brackets supplied.

Application:For 400 / 690 V industrial feeders (high performance ma-chines), chemical plants, wind turbines, PV systems and IT systems.

Technical data Part No. 961 146


Maximum continuous operating voltage (AC) UC

440 V





Technical data Part No. 961 176


Maximum continuous operating voltage (AC) UC

760 V


Voltage protection level UP ≤ 4,0 kV




Part No.

DBM 1 CI 440 FM Single-pole 961 146


Part No.

DBM 1 CI 760 FM Single-pole 961 176

DEH

N S

PA

RK GAP TECHNOLOGY INSIDE

WAVE BREAKER FUNCTI

ON

WBF

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Status indication

Floating remote signalling contact

Varistor

DEHNguard® CI for 230/400V applications

DEHNguard® CI for 400/690V applications


Floating remote signalling contact

Varistor

Status indication

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DEHNguard® CI: Modulartype 2 arrester with integrated backup fuseThe modular DEHNguard® CI surge arresters, in the functional Red/Line® design, provide surge protection in a module which is only one standard DIN module wide. DEHNguard® CI sets new standards in terms of saving space, ease of use and safety.

The FM version of DEHNguard® CI features a floatingremote signalling contact.

Benefits of DEHNguard® CI:• Integrated and monitored backup fuse• System availability in case of a fault• Fast assessment of the operating state• Replacement of modules without tools• Module locking system• Suitable for all system configurations• Top performance thanks to the coordination of fuse

and SPD

Benefits of the integrated backup fuse:

• Maximum system availability• Low space requirement• Fast installation• Universal use• Integrated fuse monitoring• Short cable length

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Technical data



275 V

Nominal discharge current (8/20) In 12.5 kA

Maximum discharge current (8/20) Imax 25 kA




Short-circuit withstand capability 25 kArms


Part No.

DG M TNC CI 275 TN-C 952 304

DG M TNC CI 275 FM TN-C * 952 309

DG M TNS CI 275 TN-S 952 401

DG M TNS CI 275 FM TN-S * 952 406

DG M TT CI 275 TT and TN-S 952 322

DG M TT CI 275 FM TT and TN-S * 952 327

DG M TN CI 275 TN 952 173

DG M TN CI 275 FM TN * 952 178

DG M TT 2P CI 275 TT and TN 952 171

DG M TT 2P CI 275 FM TT and TN * 952 176

DEHNguard® M/S CIType 2 arrester with integrated backup fuse

DEHNguard® M/S CI is a modular surge arrester withintegrated backup fuse and a width of one standard DINmodule. System availability is ensured even if the arrester isoverloaded.

Application:For systems which require high availability, e.g., in hospitals,airports, safety systems, computer centres, etc.

Technical data



440 V







Part No.

DG SE CI 440 FM 952 920

DEHNguard® SE CI 440 FMType 2 arrester with integrated backup fuse

DEHNguard SE CI is a modular surge arrester withintegrated backup fuse and a width of 1.5 standard DINmodules. System availability is ensured even if the arrester isoverloaded.

Application:For 400 / 690 V industrial feeders (high performance ma-chines), chemical plants, wind turbines, PV systems and IT systems.

* with remote signalling contact

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Technical data



440 V

Varistor rated voltage (Umov) 750 V







Part No.

DG SE CI WE 440 FM 952 923

DEHNguard® SE CI WE 440 FMType 2 arrester with integrated backup fuse

DEHNguard SE CI WE is a modular surge arrester withintegrated backup fuse and a width of 1.5 standard DINmodules. System availability is ensured even if the arrester isoverloaded.

Application:For 400 / 690 V industrial feeders (high performance ma-chines), chemical plants, wind turbines, PV systems and IT systems. The high varistor rating makes it ideal for convert-ers with voltage peaks.

Technical data



280 V

Nominal discharge current (8/20) In 15 kA

Maximum discharge current (8/20) Imax 30 kA






Part No.

V NH00 280 Single-pole, NH size 00 900 261

V NH00 280 FM with signal pin for remote signalling

900 263

V NH1 280 Single-pole, NH size 1 900 270

VA NH00 280 Single-pole, NH size 00 900 262

VA NH00 280 FM with signal pin for remote signalling

900 264

VA NH1 280 Single-pole, NH size 1 900 271

V NH, VA NHType 2 arrester with integrated backup fuse

Thanks to their application-optimised mechanical design, V NH and VA NH arresters can easily be integrated in busbar systems. A signalling pin functions as a visual indicator. Sys-tem availability is ensured even if the arrester is overloaded.

Application:Particularly for retrofits and in TNC busbar systems.

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Increased Safety for Switchgear Cabinets - dehn-africa.com · Technical data SPD nach EN 61643-11...

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