DEHNguard® modular with integrated backup fuse

Arrester backup fuse integrated in the protection module
Prewired complete unit consisting of a base part and plug-in protection modules
Energy coordination with other arresters of the Red/Line product family

High discharge capacity
High reliability due to "Thermo Dynamic Control" SPD monitoring device
Easy replacement of protection modules without tools due to module locking system with module release button

For protecting low-voltage consumer's installations against surges. For use in conformity with the lightning protection zones concept at the boundaries from 0_B– 1 and higher.

Details

DEHNguard M TNC CI 275: Modular surge arrester with integrated backup fuse for TN-C systems
DEHNguard M TNS CI 275: With integrated backup fuse for TN-S systems
DEHNguard M TT CI 275: With integrated backup fuse for TT and TN-S systems ("3+1" circuits)
DEHNguard M TN CI 275: With integrated backup fuse for 230 V TN systems
DEHNguard M TT 2P CI 275: With integrated backup fuse for 230 V TT and TN systems ("1+1" circuits)
DEHNguard S CI 275: Modular single-pole surge arrester with integrated backup fuse
DEHNguard M ... CI 275 FM: With remote signalling contact for monitoring device (floating changeover contact)

The modular surge arresters of the DEHNguard M ... CI family with their functional Red/Line design combine short-circuit and surge protection in a single protection module, setting new standards for user-friendly applications.
The protective circuit has the arrester backup fuse integrated in the protection module. The heavy-duty zinc oxide varistor and the dual Thermo Dynamic Control monitoring device allow easy installation with minimum space requirements.
Due to the integrated arrester backup fuse the user does not have to worry about arrester-specific dimensioning requirements such as backup protection in the event of a short-circuit and impulse current carrying capability.

The user has the option to implement space-saving surge protection measures in installations with short-circuit currents up to 25 kA_rms which cover all functions specified in installation standards. All circuits including the N-PE circuit feature an operating state indicator required in accordance with the IEC 60364-5-53 standard.
The "Thermo Dynamic Control" monitoring device evaluates the surface temperature of the heavy-duty varistor and the intensity of the discharge current. The mechanical visual indication via green and red flags, which is free of operating currents, shows the availability of the protective circuit. It also indicates the activation of the "Thermo Dynamic Control" monitoring device and the integrated arrester backup fuse.
In addition to the mechanical operating state and fault indication, the ...FM version of the DEHNguard M ...CI devices features a three-pole remote signalling terminal. With its floating changeover contact, the remote signal can be used as break or make contact according to the particular circuit concept.

All the benefits of the modular design of the DEHNguard M family have been integrated into the new DEHNguard M ... CI family.
The system-configuration-specific product designation and the "Thermo Dynamic Control" monitoring device reflect the high safety requirements.
The unique module locking system prevents the protection modules from becoming loose due to shock during transport or due to the enormous forces of discharge. Nevertheless, the protection modules can be easily replaced without tools, the need to de-energise and removing the distribution board cover by simply pressing the user-friendly module release button of the protection modules. To prevent incorrect insertion by the installer or user, every protective circuit of the multipole and single-pole arresters and every protection module is mechanically coded.

The surge arresters of the mutlipole modular DEHNguard M ... CI family feature multifunctional terminals on a standardised spacing of one module for connecting conductors and busbars, allowing easy wiring with other DIN rail mounted devices. Thus, a variety of applications can be easily connected in series in accordance with IEC 60364-5-53 for optimal protection.

Further Models / Accessory:

DEHNguard M TNC CI ... (FM)
DEHNguard M TNS CI ... (FM)
DEHNguard M TT CI ... (FM)
DEHNguard M TN CI ... (FM)
DEHNguard M TT 2P CI ... (FM)
DEHNguard S CI ... (FM)
Accessories

DEHNguard M TNC CI ... (FM)

Basic circuit diagram DG M TNC CI ... FM

Dimension drawing DG M TNC CI ... FM

Modular surge arrester with integrated backup fuses for TN-C systems

Arrester backup fuse integrated in the protection module
Prewired complete unit consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Nominal a.c. voltage	U_N	V
Max. continuous operating a.c. voltage	U_C	V
Nominal discharge current (8/20 µs)	I_n	kA
Max. discharge current (8/20 µs)	I_max	kA
Voltage protection level	U_P	kV
Voltage protection level at 5 kA	U_P	kV
Response time	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV)	U_T	V / 5 sec.
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG M TNC CI 275	DG M TNC CI 275 FM
952 304	952 309
Type 2	Type 2
Class II	Class II
230/400	230/400
275	275
12.5	12.5
25	25
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 25	≤ 25
not required	not required
25	25
335	335
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
3	3
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	CE_DG_M_TNC_CI_275_FM

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	Summary RedLine LGA
	CE_DG_M_TNC_CI_275_FM

DEHNguard M TNS CI ... (FM)

Basic circuit diagram DG M TNS CI ... FM

Dimension drawing DG M TNS CI ... FM

Modular surge arrester with integrated backup fuses for TN-S systems

Arrester backup fuse integrated in the protection module
Prewired complete unit for TN-S systems consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Nominal a.c. voltage	U_N	V
Max. continuous operating a.c. voltage	U_C	V
Nominal discharge current (8/20 µs)	I_n	kA
Max. discharge current (8/20 µs)	I_max	kA
Voltage protection level	U_P	kV
Voltage protection level at 5 kA	U_P	kV
Response time	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV)	U_T	V / 5 sec.
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG M TNS CI 275	DG M TNS CI 275 FM
952 401	952 406
Type 2	Type 2
Class II	Class II
230/400	230/400
275	275
12.5	12.5
25	25
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 25	≤ 25
not required	not required
25	25
335	335
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
4	4
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	CE_DG_M_TNS_CI_275_FM

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	Summary RedLine LGA
	CE_DG_M_TNS_CI_275_FM

DEHNguard M TT CI ... (FM)

Basic circuit diagram DG M TT CI ... FM

Dimension drawing DG M TT CI ... FM

Modular surge arrester with integrated backup fuses for TT and TN-S systems ("3+1" circuits)

Arrester backup fuse integrated in the protection module
Prewired complete unit for TT and TN-S systems consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Nominal a.c. voltage	U_N	V
Max. continuous operating a.c. voltage [L-N]	U_C	V
Max. continuous operating a.c. voltage [N-PE]	U_C	V
Nominal discharge current (8/20 µs) [L-N]	I_n	kA
Nominal discharge current (8/20 µs) [N-PE]	I_n	kA
Max. discharge current (8/20 µs) [L-N]	I_max	kA
Max. discharge current (8/20 µs) [N-PE]	I_max	kA
Lightning impulse current (10/350 µs) [N-PE]	I_imp	kA
Voltage protection level [L-N]	U_P	kV
Voltage protection level [L-N] at 5 kA	U_P	kV
Voltage protection level [N-PE]	U_P	kV
Follow current extinguishing capability [N-PE]	I_fi	A_rms
Response time [L-N]	t_A	ns
Response time [N-PE]	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV) [L-N]	U_T	V / 5 sec.
Temporary overvoltage (TOV) [N-PE]	U_T	V / 200 ms
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG M TT CI 275	DG M TT CI 275 FM
952 322	952 327
Type 2	Type 2
Class II	Class II
230/400	230/400
275	275
255	255
12.5	12.5
20	20
25	25
40	40
12	12
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 1.5	≤ 1.5
100	100
≤ 25	≤ 25
≤ 100	≤ 100
not required	not required
25	25
335	335
1200	1200
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
4	4
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	CE_DG_M_TT_CI_275_FM

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	Summary RedLine LGA
	CE_DG_M_TT_CI_275_FM

DEHNguard M TN CI ... (FM)

Basic circuit diagram DG M TN CI ... FM

Dimension drawing DG M TN CI ... FM

Modular surge arrester with integrated backup fuses for single-phase 230 V TN systems

Arrester backup fuse integrated in the protection module
Prewired complete unit consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Nominal a.c. voltage	U_N	V
Max. continuous operating a.c. voltage	U_C	V
Nominal discharge current (8/20 µs)	I_n	kA
Max. discharge current (8/20 µs)	I_max	kA
Voltage protection level	U_P	kV
Voltage protection level at 5 kA	U_P	kV
Response time	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV)	U_T	V / 5 sec.
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG M TN CI 275	DG M TN CI 275 FM
952 173	952 178
Type 2	Type 2
Class II	Class II
230	230
275	275
12.5	12.5
25	25
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 25	≤ 25
not required	not required
25	25
335	335
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
2	2
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	CE_DG_M_TN_CI_275_FM
	2129389.01

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	CE_DG_M_TN_CI_275_FM
	2129389.01
	Summary RedLine LGA

DEHNguard M TT 2P CI ... (FM)

Basic circuit diagram DG M TT 2P CI ... FM

Dimension drawing DG M TT 2P CI ... FM

Modular surge arrester with integrated backup fuses for single-phase 230 V TT and TN systems ("1+1" circuits)

Arrester backup fuse integrated in the protection module
Prewired complete unit consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Nominal a.c. voltage	U_N	V
Max. continuous operating a.c. voltage [L-N]	U_C	V
Max. continuous operating a.c. voltage [N-PE]	U_C	V
Nominal discharge current (8/20 µs) [L-N]	I_n	kA
Nominal discharge current (8/20 µs) [N-PE]	I_n	kA
Max. discharge current (8/20 µs) [L-N]	I_max	kA
Max. discharge current (8/20 µs) [N-PE]	I_max	kA
Lightning impulse current (10/350 µs) [N-PE]	I_imp	kA
Voltage protection level [L-N]	U_P	kV
Voltage protection level [L-N] at 5 kA	U_P	kV
Voltage protection level [N-PE]	U_P	kV
Follow current extinguishing capability [N-PE]	I_fi	A_rms
Response time [L-N]	t_A	ns
Response time [N-PE]	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV) [L-N]	U_T	V / 5 sec.
Temporary overvoltage (TOV) [N-PE]	U_T	V / 200 ms
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG M TT 2P CI 275	DG M TT 2P CI 275 FM
952 171	952 176
Type 2	Type 2
Class II	Class II
230	230
275	275
255	255
12.5	12.5
20	20
25	25
40	40
12	12
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 1.5	≤ 1.5
100	100
≤ 25	≤ 25
≤ 100	≤ 100
not required	not required
25	25
335	335
1200	1200
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
2	2
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	CE_DG_M_TT_2P_CI_275_FM

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	Summary RedLine LGA
	CE_DG_M_TT_2P_CI_275_FM

DEHNguard S CI ... (FM)

Basic circuit diagram DG S CI ... FM

Dimension drawing DG S CI ... FM

Pluggable single-pole surge arrester consisting of a base part and plug-in protection module; with integrated backup fuse; optionally available with floating remote signalling contact

Arrester backup fuse integrated in the protection module
Prewired complete unit consisting of a base part and plug-in protection modules

High reliability due to "Thermo Dynamic Control" SPD monitoring device

Type
Part No.
SPD according to EN 61643-11
SPD according to IEC 61643-1
Max. continuous operating a.c. voltage	U_C	V
Nominal discharge current (8/20 µs)	I_n	kA
Max. discharge current (8/20 µs)	I_max	kA
Voltage protection level	U_P	kV
Voltage protection level at 5 kA	U_P	kV
Response time	t_A	ns
Max. mains-side overcurrent protection
Short-circuit withstand capability		kA_rms
Temporary overvoltage (TOV)	U_T	V / 5 sec.
TOV characteristic
Operating temperature range	T_U
Operating state/fault indication
Number of ports
Cross-sectional area (min.)
Cross-sectional area (max.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity		module(s), DIN 43880
Approvals
Type of remote signalling contact
a.c. switching capacity
d.c. switching capacity
Cross-sectional area for remote signalling terminals
Amount
Further Pictures
Options

DG S CI 275	DG S CI 275 FM
952 079	952 099
Type 2	Type 2
Class II	Class II
275	275
12.5	12.5
25	25
≤ 1.5	≤ 1.5
≤ 1	≤ 1
≤ 25	≤ 25
not required	not required
25	25
335	335
withstand	withstand
-40°C...+80°C	-40°C...+80°C
green / red	green / red
1	1
1.5 mm²solid/flexible	1.5 mm²solid/flexible
35 mm²stranded/25 mm²flexible	35 mm²stranded/25 mm²flexible
35 mm DIN rails acc. to EN 60715	35 mm DIN rails acc. to EN 60715
thermoplastic, red, UL 94 V-0	thermoplastic, red, UL 94 V-0
indoor	indoor
IP 20	IP 20
1	1
KEMA, VDE	KEMA, VDE
	changeover contact
	250 V/0.5 A
	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
	max. 1.5 mm²solid/flexible
pc(s)	pc(s)

Further Information	Further Information

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Certificates
	40032221
	2129389.01
	CE_DG_S_CI_275_FM

Further Information
	Product Specifications (Text)
	Product Specifications (PDF)
	Installation Instructions

Accessories

Varistor-based protection module for DEHNguard M CI

Protection module for DEHNguard M ... CI 275 arresters comprising a varistor connected in series with the integrated backup fuse

Type
Part No.
Amount
Options

DG MOD CI 275
952 020
pc(s)
Further Information

Varistor-based protection module

Varistor-base protection module for DEHNguard M ... and DEHNguard S ...

Type
Part No.
Amount
Options

DG MOD 275
952 010
pc(s)
Further Information

N-PE spark-gap-based protection module for DEHNguard M TT ...

N-PE spark-gap-based protection module for two-pole and four-pole DEHNguard DG M TT ... surge arresters

Type
Part No.
Amount
Options

DG MOD NPE
952 050
pc(s)
Further Information