power supply systems dehnguard tnc / tns / tt / it surge ... pdfs/dehnguard_275_fm.pdf · power...

POWER SUPPLY SYSTEMSSURGE ARRESTERS – TYPE 2

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For protection of low voltage consumer´s installations against surges.For use in the lightning protection zones concept at boundaries 0B – 1and higher.

• Complete prewired unit for commonsystem configurations, consisting of a base part and plug-in protectionmodules

• Energy coordination possible withupstream lightning current arresters,e.g. DEHNbloc Maxi

• High discharge capacity thanks topowerful zinc oxide varistors or zincoxide varistors/spark gaps (DEHNguardTT ...)

• Reliable control thanks to ThermoDynamic Control disconnector with dualmonitoring

• Fault indication by red mark in theinspection window

• Multifunctional terminals for con-necting conductors and busbars

DEHNguard TNC 230/400: Complete unit for TN-C systemsDEHNguard TNS 230/400: Complete unit for TN(C)-S systemsDEHNguard TT 230/400: Complete unit for TT- and TN-S systemsDEHNguard IT 500: Complete unit for IT systems without included neutral conductor with

500 V phase-to-phase voltageDEHNguard ... FM: With remote signalling contact for monitoring device (floating changeover contact)

DEHNguard® TNC / ... TNS / ... TT /... ITMulti-pole Surge Arrester

The multi-pole surge arresters of theDEHNguard TNC / ... TNS / ... TT / ... IT fami-ly offer high safety and easy utilisation.Theapplication-orientated product descriptionmakes it easier to choose the right com-plete prewired unit. Reduced installationerrors and work are unbeatable advan-tages that can be offered to the customer.Both the dual monitoring unit for each cir-cuit with Thermo Dynamic Control and the

code of the plug-in protection module types preset by the manufacturercharacterise the high reliability of the equipment. Damage caused by sub-sequent installation errors of the installer or the operator is unlikely. Apartfrom measuring the surface temperature of the high-capacity varistor, theThermo Dynamic Control monitoring and disconnection device also eva-

luates the intensity of the discharge currents. Thus, it ensures that thearrester does not only change into a safe and isolated state at “standard”overloads but also remains safe if the device parameters are significantlyexceeded.

Apart from the standard visual indication with green and red colouredmarks, type DEHNguard... FM provides a 3-pole terminal for remote sig-nalling. As the remote signalling contact works also as a floating changeover contact, the remote signal can be used as a break or make

contact according to circuit concept. Thesurge arresters of the DEHNguard TNC / ... TNS / ... TT / ... IT family provide multi-functional terminals for connection of con-ductors and busbars for easy wiring withother DIN rail mounted devices.

SPD Type 2 according to EN 61643-11;Classification C according to E DIN VDE 0675-6;SPD Class II according to IEC 61643-1;


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Varistor-based Protection Module

Type T 275

Nominal discharge current (8/20) 20 kAMax. continuous ac voltage 275 VMax. continuous dc voltage 350 V

PU PartType pc(s) No.T 275 1 900 670

DEHNguard® TNC / ... TNS / ... TT / ... ITDEHNguard TNC

900 510 DG TNC230 400 900 540DG TNC 230 400 FM

DG TNC 230 400DEHNguard TNC, 3-pole 900 510DG TNC 230 400 FMDEHNguard TNC FM, 3-pole 900 540

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Basic circuit diagram DG TNC 230 400 FM Dimension drawing DG TNC 230 400 (FM)

DG TNC 230 400 (FM): Surge arrester for TN-C systems

DG TNC 230 400 DG TNC 230 400 FM

SPD according to EN 61643-11 Type 2 Type 2

SPD according to IEC 61643-1 Class II Class II

Classification according to E DIN VDE 0675-6 C C

Nominal voltage ac UN 230/400 V 230/400 V

Max. continuous ac voltage UC 275 V 275 V

Nominal discharge current (8/20) In 20 kA 20 kA

Max. discharge current (8/20) Imax 40 kA 40 kA

Voltage protection level UP ≤ 1.25 kV ≤ 1.25 kV

Voltage protection level at 5 kA UP ≤ 1 kV ≤ 1 kV

Response time tA ≤ 25 ns ≤ 25 ns

Max. mains-side overcurrent protection 125 A gL/gG 125 A gL/gG

Short circuit withstand capability at max. mains-side overcurrent protection 50 kArms 50 kArms

TOV voltage UT 335 V / 5 sec. 335 V / 5 sec.

Operating temperature range TU -40°C...+80°C -40°C...+80°C

Cross-sectional area (min.) 1.5 mm2 solid / flexible 1.5 mm2 solid / flexible

Cross-sectional area (max.) 35 mm2 stranded / 25 mm2 flexible 35 mm2 stranded / 25 mm2 flexible

Mounting on 35 mm DIN rail acc. to EN 60715 35 mm DIN rail acc. to EN 60715

Enclosure material red thermoplastic, UL 94 V-0 red thermoplastic, UL 94 V-0

Degree of protection IP 20 IP 20

Dimension 3 mods., DIN 43880 3 mods., DIN 43880

Approvals, Certifications KEMA, VDE, UL KEMA, VDE, UL

Type of remote signalling contact — changeover contact

Switching capacity ac — 250 V/0.5 A

Switching capacity dc — 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A

Cross-sectional area for remote signalling terminals — max. 1.5 mm2 solid / flexible

Ordering information

Type DG TNC 230 400 DG TNC 230 400 FM

Part No. 900 510 900 540

Packing unit 1 pc(s) 1 pc(s)

Accessory Part for DEHNguard® TNC / ... TNS / ... TT / ... IT900670 T 275

T 275 DGTSurge protection Module, 275 Venglish 900670


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DEHNguard® TNC / ... TNS / ... TT / ... ITDEHNguard TNS

00 530 DG TNS30 400 900 560

DG TNS 230 400 FM

DG TNS 230 400DEHNguard TNS, 4-pole 900 530DG TNS 230 400 FMDEHNguard TNS FM, 4-pole 900 560

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Basic circuit diagram DG TNS 230 400 FMDimension drawing DG TNS 230 400 (FM)

DG TNS 230 400 (FM): Surge arrester for TN-S systems

DG TNS 230 400 DG TNS 230 400 FM










Response time tA ≤ 25 ns 25 ns

















Type DG TNS 230 400 DG TNS 230 400 FM

Part No. 900 530 900 560



Type T 275






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DEHNguard® TNC / ... TNS / ... TT / ... ITDEHNguard TT

900 520 DG TT230 400 900 550DG TT 230 400 FM

DG TT 230 400DEHNguard TT, 4-pole 900 520DG TT 230 400 FMDEHNguard TT FM, 4-pole 900 550

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Basic circuit diagram DG TT 230 400 FM Dimension drawing DG TT 230 400 (FM)

DG TT 230 400 (FM): Surge arrester for TT- and TN-S systems

DG TT 230 400 DG TT 230 400 FM





Max. continuous ac voltage [L-N] UC 275 V 275 V

Max. continuous ac voltage [N-PE] UC 255 V 255 V



Lightning impulse current (10/350) [N-PE] Iimp 12 kA 12 kA

Voltage protection level [L-N] UP ≤ 1.25 kV ≤ 1.25 kV

Voltage protection level [L-N] at 5 kA UP ≤ 1 kV ≤ 1 kV

Voltage protection level [N-PE] UP ≤ 1.5 kV ≤ 1.5 kV

Follow current extinguishing capability [N-PE] Ifi 100 Arms 100 Arms

Response time [L-N] tA ≤ 25 ns ≤ 25 ns

Response time [N-PE] tA ≤ 100 ns ≤ 100 ns



TOV voltage [L-N] UT 335 V / 5 sec. 335 V / 5 sec.

TOV voltage [N-PE] UT 1200 V / 200 ms 1200 V / 200 ms














Type DG TT 230 400 DG TT 230 400 FM

Part No. 900 520 900 550


Accessory Part for DEHNguard® TNC / ... TNS / ... TT / ... IT

N-PE Spark-Gap based Protection ModuleType T C 255

Nominal discharge current (8/20) 20 kAMax. discharge current (8/20) 40 kA

PU PartType pc(s) No.T C 255 1 900 134

900134 T C 255

T C 255 TCProtection Module, 255 Venglish 900134


Type T 275






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DEHNguard® TNC / ... TNS / ... TT / ... ITDEHNguard IT

00 516 DG IT 50000 546 DG IT 500M

DG IT 500DEHNguard IT, 500 V 900 516DG IT 500 FMDEHNguard IT FM, 500 V 900 546

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Basic circuit diagram DG IT 500 FMDimension drawing DG IT 500 (FM)

DG IT 500 (FM): Surge arrester for IT systems with 500 V phase-to-phase voltage

DG IT 500 DG IT 500 FM




Nominal voltage ac UN 500 V 500 V





Voltage protection level at 5 kA UP ≤ 2.0 kV ≤ 2.0 kV

















Type DG IT 500 DG IT 500 FM

Part No. 900 516 900 546


Accessory Part for DEHNguard® TNC / ... TNS / ... TT / ... IT


Type T 600



900671 T 600

T 600 DGTSurge Protection Module, 600 Venglish 900671


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• Complete prewired unit for common accurrent system configurations, consis-ting of a base part and plug-in protec-tion modules

• Energy coordination possible with up-stream lightning current arresters,e.g. DEHNbloc Maxi

• High discharge capacity thanks to high-capacity zinc oxide varistors and/or zincoxide varistors/spark gaps (DEHNguardTT ...)

• Reliable control thanks to ThermoDynamic Control disconnector with dual monitoring

• Fault indication via red mark in theinspection window

• Multifunctional terminals for connec-tion of conductors and busbars

DEHNguard TN 230: Complete unit for 230 V-TN systemsDEHNguard TT 230: Complete unit for 230 V-TT and TN systemsDEHNguard TN 230 FM: Complete unit for 230 V-TN systems; with remote signalling contact for monitoring device

(floating changeover contact)DEHNguard TT 230 FM: Complete unit for 230 V-TT and TN systems; with remote signalling contact for monitoring device

(floating changeover contact)

DEHNguard TN 230 / ... TT 230Two-pole Surge Arrester

The 2-pole surge arresters of theDEHNguard TN/...TT family providethe highest possible safety andcomfort.

The application-orientated productdescription makes it considerablyeasier to choose the right completeprewired unit. Reduced installationmistakes and work are unbeatableadvantages that can be offered tothe customer. Both the dual moni-

toring unit for each circuit with Thermo Dynamic Control and the code ofthe plug-in protection module types preset by the manufacturer characte-rise the high reliability of the equipment. Damage caused by subsequentinstallation errors of the installer or the operator is unlikely. Apart frommeasuring the surface temperature of the high-capacity varistor, theThermo Dynamic Control monitoring and disconnection device also eva-luates the intensity of the discharge currents. Thus, it ensures that thearrester does not only change into a safe and isolated state at “standard”overloads but also remains safe if the device parameters are significantlyexceeded.

Apart from the standard visual indication with green and red colouredmarks, type DEHNguard ... FM provides a 3-pole terminal for remote sig-nalling. As the remote signalling contact works also as a floating chan-geover contact, the remote signal can be used as a break or make contactaccording to circuit concept.

The surge arresters of the DEHN-guard TN/...TT family provide multi-functional terminals for connectionof conductors and busbars for easywiring with other DIN rail mounteddevices.

SPD Type 2 according to EN 61643-11;Classification C according to E DIN VDE 0675-6;

SPD Class II according to IEC 61643-1;



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DEHNguard TN 230 / ... TT 230DEHNguard TN 230

00 506 DG TN3000 507 DG TN30 FM

DG TN 230DEHNguard TN, 2-pole, 230 V 900 506DG TN 230 FMDEHNguard TN FM, 2-pole, 230 V 900 507

Basic circuit diagram DG TN 230 FMDimension drawing DG TN 230 (FM)

DG TN ...: Surge arrester for single-phase 230 V TN systems

DG TN 230 DG TN 230 FM








Voltage protection level Up ≤ 1.25 kV ≤ 1.25 kV







Min. cross-sectional area 1.5 mm2 solid / flexible 1.5 mm2 solid / flexible

Max. cross-sectional area 35 mm2 stranded / 25 mm2 flexible 35 mm2 stranded / 25 mm2 flexible





Approvals, Certifications KEMA KEMA


Switching capacity ac — 250 V / 0.5 A




Type DG TN 230 DG TN 230 FM

Part No. 900 506 900 507


Accessory Part for DEHNguard TN 230 / ... TT 230

Varistor-based Protection ModuleType T 275



900670 T 275



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900670 T 275



N-PE Spark-Gap based Protection ModuleType T C 255

Nominal discharge current (8/20) 20 kAMax. discharge current (8/20) 40 kA

PU PartType pc(s) No.T C 255 1 900 134

900134 T C 255

T C 255 TCProtection Module, 255 Venglish 900134

DEHNguard TN 230 / ... TT 230DEHNguard TT 230

900 508 DG TT230900 509 DG TT230 FM

DG TT 230DEHNguard TT, 2-pole 900 508DG TT 230 FMDEHNguard TT FM, 2-pole 900 509

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Basic circuit diagram DG TT 230 FM Dimension drawing DG TT 230 (FM)

DG TT ...: Surge arrester for single-phase 230 V TT and TN systems

DG TT 230 DG TT 230 FM










Min. cross-sectional area 1.5 mm2 solid / flexible 1.5 mm2 solid / flexible

Max. cross-sectional area 35 mm2 stranded / 25 mm2 flexible 35 mm2 stranded / 25 mm2 flexible





Approvals, Certifications KEMA KEMA






Type DG TT 230 DG TT 230 FM

Part No. 900 508 900 509



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• High discharge capacity thanks topowerful zinc oxide varistors

• Quick response


• Energy coordination possible withupstream lightning current arresters,e.g. DEHNbloc Maxi


• Slim design (modular construction)according to DIN 43880


DEHNguard: Single-part (compact unit)DEHNguard FM: Single-part (compact unit); with remote signalling contact for control device

(floating changeover contact)

DEHNguard® / DEHNguard® ... FMSingle-pole, compact Surge Arrester

SPD Type 2 according to EN 61643-11;Classification C according to E DIN VDE 0675-6;SPD Class II according to IEC 61643-1;

The devices of the compact DEHNguard family are distinctively versatile.Whether in single-phase systems, in dc power supplies or at high systemvoltages – there is always the right arrester for every kind of application.The multifunctional terminals provide the devices with an almost unlimi-ted flexibility for connection with each other, but also with other DIN railmounted devices in the same distribution board. Not only flexibility characterises the DEHNguard family. Moreover, it is the striking perfor-mance parameters setting trends all over the world.

A high discharge capacity, low protection level and dual safety ThermoDynamic Control disconnector define the high reliability of the devices.

Especially the DEHN-specific Thermo Dynamic Control disconnector ensu-res the arresters to change to a safe isolated state even at extreme over-loads. Apart from the surface temperature of the high-capacity varistor,also the intensity of the discharge current is evaluated.

Apart from the standard visual indication with green and red colouredmarks, the variants of DEHNguard ... FM provide a 3-pole terminal forremote signalling. As the remote signalling contact works as a floatingchangeover contact, the remote signal can be used as a break or makecontact, according to circuit concept.


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DEHNguard® / DEHNguard® ... FMDEHNguard

900 604 DG 75900 603 DG 150900 600 DG 275900 605 DG 320900 602 DG 385900 607 DG 440900 601 DG 600

DG 75DEHNguard, 75 V 900 604DG 150DEHNguard, 150 V 900 603DG 275DEHNguard, 275 V 900 600DG 320DEHNguard, 320 V 900 605DG 385DEHNguard, 385 V 900 602DG 440DEHNguard, 440 V 900 607DG 600DEHNguard, 600 V 900 601

Basic circuit diagram DG ... Dimension drawing DG ...

DG ...: Single-pole, compact surge arrester

DG 75 DG 150 DG 275 DG 320 DG 385 DG 440 DG 600

SPD according to EN 61643-11 Type 2 Type 2 Type 2 Type 2 Type 2 Type 2 Type 2

SPD according to IEC 61643-1 Class II Class II Class II Class II Class II Class II Class II

Classification according to E DIN VDE 0675-6 C C C C C C C

Max. continuous ac voltage UC 75 V 150 V 275 V 320 V 385 V 440 V 600 V

Max. continuous dc voltage UC 100 V 200 V 350 V 420 V 500 V 585 V 600 V

Nominal discharge current (8/20) In 10 kA 15 kA 20 kA 20 kA 20 kA 20 kA 15 kA

Max. discharge current (8/20) Imax 40 kA 40 kA 40 kA 40 kA 40 kA 40 kA 30 kA

Voltage protection level Up ≤ 0.4 kV ≤ 0.7 kV ≤ 1.25 kV ≤ 1.5 kV ≤ 1.75 kV ≤ 2 kV ≤ 2.5 kV

Voltage protection level at 5 kA UP ≤ 0.35 kV ≤ 0.55 kV ≤ 1 kV ≤ 1.2 kV ≤ 1.35 kV ≤ 1.7 kV ≤ 2 kV

Response time tA ≤ 25 ns ≤ 25 ns ≤ 25 ns ≤ 25 ns ≤ 25 ns ≤ 25 ns ≤ 25 ns

Max. backup fuse 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 100 A gL/gG

Short circuit withstand

capability at max. backup fuse 50 kArms 50 kArms 50 kArms 25 kArms 25 kArms 25 kArms 25 kArms

TOV voltage UT — — 335 V / 5 sec. 335 V / 5 sec. — — —

Operating temperature range TU -40°C...+80°C -40°C...+80°C -40°C...+80°C -40°C...+80°C -40°C...+80°C -40°C...+80°C -40°C...+80°C

Cross-sectional area (min.) 1.5 mm2 solid / flexible

Cross-sectional area (max.) 35 mm2 stranded / 25 mm2 flexible

Mounting on 35 mm DIN rail acc. to EN 60715

Enclosure material red thermoplastic, UL 94 V-0

Degree of protection IP 20 IP 20 IP 20 IP 20 IP 20 IP 20 IP 20

Dimension 1 mod., DIN 43880 1 mod., DIN 43880 1 mod., DIN 43880 1 mod., DIN 43880 1 mod., DIN 43880 1 mod., DIN 43880 1 mod., DIN 43880

Approvals, Certifications KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL


Type DG 75 DG 150 DG 275 DG 320 DG 385 DG 440 DG 600

Part No. 900 604 900 603 900 600 900 605 900 602 900 607 900 601

Packing unit 1 pc(s) 1 pc(s) 1 pc(s) 1 pc(s) 1 pc(s) 1 pc(s) 1 pc(s)


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DEHNguard® / DEHNguard® ... FMDEHNguard FM

00 624 DG 75 FM00 623 DG 150M00 620 DG 275M00 625 DG 320M00 622 DG 385M00 627 DG 440M00 621 DG 600M

DG 75 FMDEHNguard FM, 75 V 900 624DG 150 FMDEHNguard FM, 150 V 900 623DG 275 FMDEHNguard FM, 275 V 900 620DG 320 FMDEHNguard FM, 320 V 900 625DG 385 FMDEHNguard FM, 385 V 900 622DG 440 FMDEHNguard FM, 440 V 900 627DG 600 FMDEHNguard FM, 600 V 900 621

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Basic circuit diagram DG ... FMDimension drawing DG ... FM

DG ... FM: Single-pole compact surge arrester with floating remote signalling contact

DG 75 FM DG 150 FM DG 275 FM DG 320 FM DG 385 FM DG 440 FM DG 600 FM








Voltage protection level Up ≤ 0.4 kV ≤ 0.7 kV ≤ 1.25 kV ≤ 1.5 kV ≤ 1.75 kV ≤ 2 kV ≤ 2.5 kV



Max. backup fuse 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 100 A gL/gG

Short circuit withstand

capability at max. backup fuse 50 kArms 50 kArms 50 kArms 25 kArms 25 kArms 25 kArms 25 kArms










Type of remote signalling contact changeover contact

Switching capacity ac 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A

Switching capacity dc 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A

Cross-sectional area for remote signalling terminals max. 1.5 mm2 solid / flexible


Type DG 75 FM DG 150 FM DG 275 FM DG 320 FM DG 385 FM DG 440 FM DG 600 FM

Part No. 900 624 900 623 900 620 900 625 900 622 900 627 900 621



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• High discharge capacity thanks to high-capacity zinc oxide varistor

• Quick response

• Two-part unit, consisting of a base partand plug-in protection component


• Energy coordination possible withupstream lightning current arrester,e.g. DEHNbloc Maxi


• Slim design (modular construction)according to DIN 43880


DEHNguard T: Two-part unit, consisting of base part and plug-in protection moduleDEHNguard T FM: Two-part unit, consisting of base part and plug-in protection module; with remote signalling contact

for control device (floating changeover contact)

DEHNguard® T / DEHNguard® T ... FMSingle-pole, pluggable Surge Arrester

The pluggable DEHNguard T surge arresters are real all-rounders.

Whether in single-phase systems, in dc power supplies or at high systemvoltages – there is always the right arrester for every kind of application.The multifunctional terminals provide the devices with an almost unlimi-ted flexibility for connection with each other, but also with other DIN railmounted devices in the same distribution board. Not only flexibility cha-racterises the DEHNguard T family. Moreover, it is the striking perfor-mance parameters setting trends all over the world.

A high discharge capacity,low voltage protectionlevel and the dual safetyThermo Dynamic Controldisconnector define thehigh reliability of the devi-ces.

Especially the DEHN-specific Thermo Dynamic Control disconnector ensu-res the arresters to change to a safe isolated state even at extreme over-loads. In parallel to the surface temperature of the high-capacity varistor,the intensity of the discharge current is also evaluated. Apart from thestandard visual indication with green and red coloured marks, the vari-ants of DEHNguard T ... FM provide a 3-pole terminal for remote signal-ling. As the remote signalling contact works also as a floating changeovercontact, the remote signal can be used as a break or make contact accor-ding to circuit concept.

Should, nevertheless, the varistor unit be overloaded despite the highdischarge capacity of the DEHNguard T devices, its two-part structureallows an easy exchange of the protection module without tools.

SPD Type 2 according to EN 61643-11;Classification C according to E DIN VDE 0675-6;

SPD Class II according to IEC 61643-1;


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DEHNguard® T / DEHNguard® T ... FMDEHNguard T

00 654 DG T 7500 653 DG T 15000 650 DG T 27500 652 DG T 32000 641 DG T 38500 655 DG T 44000 651 DG T 600

DG T 75DEHNguard T, 75 V 900 654DG T 150DEHNguard T, 150 V 900 653DG T 275DEHNguard T, 275 V 900 650DG T 320DEHNguard T, 320 V 900 652DG T 385DEHNguard T, 385 V 900 641DG T 440DEHNguard T, 440 V 900 655DG T 600DEHNguard T, 600 V 900 651

Basic circuit diagram DG T...Dimension drawing DG T ...

DG T ...: Single-pole, pluggable surge arrester, consisting of a base part and plug-in protection module

DG T 75 DG T 150 DG T 275 DG T 320 DG T 385 DG T 440 DG T 600








Voltage protection level UP ≤ 0.4 kV ≤ 0.7 kV ≤ 1.25 kV ≤ 1.5 kV ≤ 1.75 kV ≤ 2 kV ≤ 2.5 kV



Max. mains-side overcurrent protection 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 100 A gL/gG

Short circuit withstand capability

at max. mains-side overcurrent protection 50 kArms 50 kArms 50 kArms 25 kArms 25 kArms 25 kArms 25 kArms





Mounting on 35 mm DIN rail EN 60715




Approvals, Certifications KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE UL KEMA, VDE, UL KEMA, VDE, UL KEMA, VDE, UL


Type DG T 75 DG T 150 DG T 275 DG T 320 DG T 385 DG T 440 DG T 600

Part No. 900 654 900 653 900 650 900 652 900 641 900 655 900 651


Accessory Part for DEHNguard® T / DEHNguard® T ... FM


Type T 75 T 150 T 275 T 320 T 385 T 440 T 600

Nominal discharge current 10 kA 15 kA 20 kA 20 kA 20 kA 20 kA 15 kA(8/20)Max. continuous ac voltage 75 V 150 V 275 V 320 V 385 V 440 V 600 VMax. continuous dc voltage 100 V 200 V 350 V 420 V 500 V 585 V 600 V

PU PartType pc(s) No.T 75 1 900 674T 150 1 900 673T 275 1 900 670T 320 1 900 672T 385 1 900 679T 440 1 900 675T 600 1 900 671

900674 T 75900673 T 150900670 T 275900672 T 320900679 T 385900675 T 440900671 T 600

T 75 DGTSurge Protection Module, 75 Venglish 900674T 150 DGTSurge Protection Module, 150 Venglish 900673T 275 DGTSurge protection Module, 275 Venglish 900670T 320 DGTSurge Protection Module, 320 Venglish 900672T 385 DGTSurge Protection Module, 385 Venglish 900679T 440 DGTSurge Protection Module, 440 Venglish 900675T 600 DGTSurge Protection Module, 600 Venglish 900671


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DEHNguard® T / DEHNguard® T ... FMDEHNguard T FM

900 684 DG T 75FM900 683 DG T 150FM900 680 DG T 275FM900 682 DG T 320FM900 691 DG T 385FM900 685 DG T 440FM900 681 DG T 600FM

DG T 75 FMDEHNguard T FM, 75 V 900 684DG T 150 FMDEHNguard T FM, 150 V 900 683DG T 275 FMDEHNguard T FM, 275 V 900 680DG T 320 FMDEHNguard T FM, 320 V 900 682DG T 385 FMDEHNguard T FM, 385 V 900 691DG T 440 FMDEHNguard T FM, 440 V 900 685DG T 600 FMDEHNguard T FM, 600 V 900 681

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Basic circuit diagram DG T ... FM Dimension drawing DG T ... FM

DG T ... FM: Single-pole, pluggable surge arrester, consisting of base part and plug-in protectionmodule; with floating remote signalling contact

DG T 75 FM DG T 150 FM DG T 275 FM DG T 320 FM DG T 385 FM DG T 440 FM DG T 600 FM








Voltage protection level UP ≤ 0.4 kV ≤ 0.7 kV ≤ 1.25 kV ≤ 1.5 kV ≤ 1.75 kV ≤ 2 kV ≤ 2.5 kV



Max. mains-side overcurrent protection 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG 100 A gL/gG

Short circuit withstand capability

at max. mains-side overcurrent protection 50 kArms 50 kArms 50 kArms 25 kArms 25 kArms 25 kArms 25 kArms










Type of remote signalling contact changeover contact changeover contact changeover contact changeover contact changeover contact changeover contact changeover contact

Switching capacity ac 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A 250 V / 0.5 A

Switching capacity dc 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A

Cross-sectional area for remote signalling terminals max. 1.5 mm2 solid / flexible


Type DG T 75 FM DG T 150 FM DG T 275 FM DG T 320 FM DG T 385 FM DG T 440 FM DG T 600 FM

Part No. 900 684 900 683 900 680 900 682 900 691 900 685 900 681



Type T 75 T 150 T 275 T 320 T 385 T 440 T 600

Nominal discharge current 10 kA 15 kA 20 kA 20 kA 20 kA 20 kA 15 kA(8/20)Max. continuous ac voltage 75 V 150 V 275 V 320 V 385 V 440 V 600 VMax. continuous dc voltage 100 V 200 V 350 V 420 V 500 V 585 V 600 V

PU PartType pc(s) No.T 75 1 900 674T 150 1 900 673T 275 1 900 670T 320 1 900 672T 385 1 900 679T 440 1 900 675T 600 1 900 671

900674 T 75900673 T 150900670 T 275900672 T 320900679 T 385900675 T 440900671 T 600

T 75 DGTSurge Protection Module, 75 Venglish 900674T 150 DGTSurge Protection Module, 150 Venglish 900673T 275 DGTSurge protection Module, 275 Venglish 900670T 320 DGTSurge Protection Module, 320 Venglish 900672T 385 DGTSurge Protection Module, 385 Venglish 900679T 440 DGTSurge Protection Module, 440 Venglish 900675T 600 DGTSurge Protection Module, 600 Venglish 900671

The multipole surge arresters DEHNguard Y PV 1000 (FM) pass approvedDEHNguard safety to the field of photovoltaic generating plants.

Both the dual monitoring unit for each circuit with Thermo DynamicControl and the code of the plug-in protection modules preset by themanufacturer characterise the high reliability of the equipment. Damagecaused by subsequent installation errors of the installer or the operator isunlikely. Apart from the surface temperature of the high-capacity varistor,the Thermo Dynamic Control monitoring and disconnection device evalua-tes also the intensity of the discharge currents. Thus it ensures the arres-ter not to change into a safe and isolated state at “standard” overloadsonly but to remain safe also if the device parameters are significantlyexceeded.

The fault-resistant Y-circuit with 3 high-capacity varistors avoids damageat the surge protection in case of isolation faults in the generator circuitof the photovoltaic generator.

Apart from the standard visual indication with green and red colouredmarks, type DEHNguard Y PV 1000 FM provides a 3-pole terminal forremote signalling. As the remote signalling contact works also as a floating changeover contact, the remote signal can be used as a break ormake contact, according to the circuit concept. The surge arresters of theDEHNguard Y PV family provide multifunctional terminals for connectionof conductors and busbars for easy wiring with other DIN rail mounteddevices.


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For protection of low voltage consumer´s installations against surges.For use according to IEC 60364-7-712:2002-05 “Electrical installationsof buildings – Part 7-712: Requirements for special installations or loca-tions; Solar photovoltaic (PV) power supply systems”.

• Complete prewired unit for photovol-taic systems, consisting of a base partand plug-in protection modules

• Fault-resistant Y-circuit with 3 high-capacity varistors, avoids damage atthe surge protection in case of insula-tion faults in the generator circuit

• Use in accordance with IEC 60364-7-712“Electrical installations of buildings –Part 7-712: Requirements for specialinstallations or locations; Solar photo-voltaic (PV) power supply systems”

• High discharge capacity thanks topowerful zinc oxide varistors


• Fault indication by red mark in theinspection window

DEHNguard Y PV 1000: Complete unit for photovoltaic systems with UOC STC ≤ 1000 V dcDEHNguard Y PV 1000 FM: Complete unit for photovoltaic systems with UOC STC ≤ 1000 V dc with remote signalling

contact for control device (floating changeover contact)

DEHNguard® Y PVMulti-pole Surge Arrester for Photovoltaic SystemsSPD Type 2 according to EN 61643-11;

Classification C according to E DIN VDE 0675-6;SPD Class II according to IEC 61643-1;


70 www.dehn.de

DEHNguard® Y PVDG Y PV

900 517 DG Y PV1000900 547 DG Y PV1000 FM

DG Y PV 1000DEHNguard Y PV 900 517DG Y PV 1000 FMDEHNguard Y PV 900 547

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Basic circuit diagram DG Y PV 1000 FM Dimension drawing DG Y PV 1000 (FM)

DG Y PV 1000 ...: Complete circuit for photovoltaic systems with UOC STC ≤ 1000 V dc

DG Y PV 1000 DG Y PV 1000 FM




PV voltage acc. to IEC 60364-7-712 UOC STC ≤ 1000 V ≤ 1000 V

Max. continuous dc voltage [(L+/L-) —> PE] Uc 500 V 500 V



Voltage protection level UP ≤ 4 kV ≤ 4 kV

Voltage protection level at 5 kA UP ≤ 3.5 kV ≤ 3.5 kV











Switching capacity dc — 250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A



Type DG Y PV 1000 DG Y PV 1000 FM

Part No. 900 517 900 547


Accessory Part for DEHNguard® Y PV




900675 T 440

T 440 DGTSurge Protection Module, 440 Venglish 900675

power supply systems dehnguard tnc / tns / tt / it surge ... pdfs/dehnguard_275_fm.pdf · power...

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