DEHNshort – Active Arc Fault Protection System

Details

Active arc fault protection system DEHNshort in a switchgear cabinet.
  • Protection of persons and installations and function in accordance with DIN EN 61439-2, Suppl. 1 (IEC/TR 61641 ed. 3, 2014)
  • Use in low-voltage switchgear and controlgear assemblies according to IEC 61439-2 after integration tests according to IEC TS 63107
  • Maximum availability of installations
  • Modular system design
  • System status is indicated at the front of the installation

Description

DEHNshort optimally protects persons and switchgear installations from the effects of an arc fault. To achieve this, particularly short response times are required in high-energy switchgear installations. Just a few milliseconds are decisive for the intensity and the effects of an arc fault. DEHNshort detects the arc fault the moment it starts to develop, evaluates the detected sensor signals and quenches the arc fault by generating a three-phase bolted short-circuit.

Functional principle:
Detection
The protective current transformers situated upstream of the feeder circuit breakers detect the overcurrent resulting from the arc fault in all infeeds. Special light sensors detect the extremely bright light of the arc fault. Depending on the requirements of the relevant switchgear installation, light sensors are available as point sensors or fibre optic sensors.
Evaluation
Electronic detection devices link the sensor signals and activate the quenching devices of the relevant busbar as well as the shunt releases of all feeder circuit breakers in case of both detection parameters.
Quenching
As soon as the quenching devices are activated, a bolted short-circuit is generated in parallel to the arc fault within a short period of time. Due to this low-impedance bypass, the voltage drops and the arc fault is quenched immediately. Thyristors short-circuit the three phases of the busbar directly after the quenching devices have been activated. Subsequently, a spring-driven contact system carries the short-circuit current until the installation is disconnected by the feeder circuit breakers.
Isolation
To ensure that the switchgear installation is not loaded with the short-circuit current for longer than necessary – and to ensure additional safety – a disconnection command is transmitted to the relevant shunt release of all feeder circuit breakers via floating contacts. This means that the busbar section where the arc fault occurred is already isolated from the system.
Re-commissioning
The switchgear installation can be immediately re-commissioned after the fault has been rectified, the quenching devices have been replaced and an isolation test has been carried out. The arc fault protection system significantly exceeds the requirements of test criteria 1-7 of IEC TR 61641 ed3 of 2014. DEHNshort is used wherever the protection of persons and availability of the power supply is vital.

Figure 1

Built-in protective current trnsformers

Figure 2

Built-in light sensors

Figure 3

Detection devices integrated in the door

Figure 4

Built-in quenching devices

Figure 5

Basic circuit diagram

Models

Detection Device (Current + Light)

Detection Device (Point Sensor)

Detection Device (Fibre Optic Sensor)

Point Sensor

Fibre Optic Sensor

Quenching Device QD II

Fibre Optic Cable

Detection Device (Current + Light)

DSRT DD CPS .... detection device for current and light detection (DSRT PS point sensors) including output for directly connecting two 0DSRT QD II quenching devices.


Specifications

Type
Part No.
Min. / max. voltage (UN)
Degree of protection (front side)
Degree of protection (rear side)
Dimensions of the front plate (H x W)
Mounting dimensions (H x W x D)
Sensor inputs
Current inputs
Binary inputs
Tripping relay
High-speed outputs
Quenching device outputs
Binary output
Operating temperature (TU)
Tripping time of the relay
Tripping time HSO
Tripping time TX
Arc fault quenching time (tmtA)
Approvals
Weight
GTIN
PU
Part No.
  • DSRT DD CPS BACA
  • 782 030
  • 18-72 V d.c.
  • IP 50
  • IP 20
  • 177 x 102 mm
  • 157 x 82 x 164 mm
  • S1, S2, S3, S4 (3 sensors (DSRT PS) can be connected per channel)
  • 1 A / 5 A (IL1, IL2, IL3, Io)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • Up to 250 V a.c./d.c. 2 A (HS01, HS02)
  • Optical fibre cable (at least 43 mA) (2x TX)
  • 24 V d.c 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 2 ms
  • < 2 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 1,19 kg
  • 4013364245792
  • 1 pc(s)
  • 782 030
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection device for current and light detection
      Electronic detection device for arc fault protection systems
      for connecting point light sensors and a set of current transformers.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine of the entire system
      and status indication via LED display.
      Supply voltage:	                      18 - 72 V d.c.
      Power consumption:			5 W 
      Number of light sensor channels:		4
      Number of light sensors:		12 (4 x 3 sensors)
      Relay outputs:			        4 floating
      						5A, 250 V a.c./d.c.
      Current input signal:			1 / 5 A
      Number of current transformer connections:	3 for phase conductor
      						1 for total current

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD CPS BACA
      Part No.: 782 030

      or equivalent.
      Installation Instructions
      Certificates
      CE_DSRT_DD
      G616001
      CAD-Data for registered Users
      782030.stp
      782030.igs
      782030.jt
      782030.dwg
      782030m_D.dxf
  • DSRT DD CPS AACA
  • 782 031
  • 92-265 V AC / DC
  • IP 50
  • IP 20
  • 177 x 102 mm
  • 157 x 82 x 164 mm
  • S1, S2, S3, S4 (3 sensors (DSRT PS) can be connected per channel)
  • 1 A / 5 A (IL1, IL2, IL3, Io)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • Up to 250 V a.c./d.c. 2 A (HS01, HS02)
  • Optical fibre cable (at least 43 mA) (2x TX)
  • 24 V d.c. 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 2 ms
  • < 2 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 1,19 kg
  • 4013364245815
  • 1 pc(s)
  • 782 031
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection device for current and light detection
      Electronic detection device for arc fault protection systems
      for connecting point light sensors and a set of current transformers.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine of the entire system and status indication via LED display.
      Supply voltage:	                   80 - 265 V a.c./d.c.
      Power consumption:			5 W 
      Number of light sensor channels:		4
      Number of light sensors:		12 (4 x 3 sensors)
      Relay outputs:			        4 floating
      						5A, 250 V a.c./d.c.
      Current input signal:			1 / 5 A
      Number of current transformer connections:	3 for phase conductor
      						1 for total current

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD CPS AACA
      Part No.: 782 031

      or equivalent.
      Installation Instructions
      Certificates
      CE_DSRT_DD
      G616001
      CAD-Data for registered Users
      782030.stp
      782030.igs
      782030.jt
      782030.dwg
      782030m_D.dxf

Detection Device (Point Sensor)

DSRT DD PS .... detection device for light detection (DSRT PS point sensors) including output for directly connecting two DSRT QD II quenching devices.


Specifications

Type
Part No.
Min. / max. voltage (UN)
Degree of protection (front side)
Degree of protection (rear side)
Dimensions of the front plate (H x W)
Mounting dimensions (H x W x D)
Sensor inputs
Binary inputs
Tripping relay
Quenching device outputs
Binary output
Operating temperature (TU)
Tripping time of the relay
Tripping time TX
Arc fault quenching time (tmtA)
Approvals
Weight
GTIN
PU
Part No.
  • DSRT DD PS BACA
  • 782 040
  • 18-72 V d.c.
  • IP 50
  • IP 20
  • 177 x 52 mm
  • 157 x 45 x 164 mm
  • S1, S2, S3, S4 (3 sensors (DSRT PS) can be connected per channel)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • Optical fibre cable (at least 43 mA) (2x TX)
  • 24 V d.c. 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 2 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 784 g
  • 4013364245822
  • 1 pc(s)
  • 782 040
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection device for light detection by means of point sensors
      Electronic detection device for arc fault protection systems
      for connecting 12 point light sensors.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine and status indication via LED display. 
      Supply voltage:	                             18 - 72 V d.c.
      Power consumption:			5 W 
      Number of light sensor channels:		4
      Number of light sensors:		12 (4 x 3 sensors)
      Relay outputs:		                4 floating
      			5A, 250 V a.c./d.c.
      

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD PS BACA
      Part No.: 782 040

      or equivalent.
      Installation Instructions
      Certificates
      G616001
      CE_DSRT_DD
      CAD-Data for registered Users
      782040.stp
      782040.igs
      782040.jt
      782040.dwg
      782040m_D.dxf
  • DSRT DD PS AACA
  • 782 041
  • 92-265 V AC / DC
  • IP 50
  • IP 20
  • 177 x 52 mm
  • 157 x 45 x 164 mm
  • S1, S2, S3, S4 (3 sensors (DSRT PS) can be connected per channel)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • Optical fibre cable (at least 43 mA) (2x TX)
  • 24 V d.c. 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 2 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 784 g
  • 4013364245839
  • 1 pc(s)
  • 782 041
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection device for light detection with point sensors
      Electronic detection device for arc fault protection systems
      for connecting 12 point light sensors.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine and status indication via LED display. 
      Supply voltage:	                   80 - 265 V a.c./d.c.
      Power consumption:			5 W 
      Number of light sensor channels:		4
      Number of light sensors:		12 (4 x 3 sensors)
      Relay outputs:			4 floating
      			5A, 250 V a.c./d.c.
      

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD PS AACA
      Part No.: 782 041

      or equivalent.
      Installation Instructions
      Certificates
      CE_DSRT_DD
      G616001
      CAD-Data for registered Users
      782040.stp
      782040.igs
      782040.jt
      782040.dwg
      782040m_D.dxf

Detection Device (Fibre Optic Sensor)

DSRT DD FS .... detection device for light detection (DSRT FS fibre optic sensor).


Specifications

Type
Part No.
Min. / max. voltage (UN)
Degree of protection (front side)
Degree of protection (rear side)
Dimensions of the front plate (H x W)
Mounting dimensions (H x W x D)
Sensor inputs
Binary inputs
Tripping relay
Binary output
Operating temperature (TU)
Tripping time of the relay
Arc fault quenching time (tmtA)
Approvals
Weight
GTIN
PU
Part No.
  • DSRT DD FS BAAA
  • 782 050
  • 18-72 V d.c.
  • IP 50
  • IP 20
  • 177 x 52 mm
  • 157 x 45 x 164 mm
  • S1, S2, S3 (one fibre optic sensor (DSRT FS) can be connected per channel)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • 24 V d.c. 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 851 g
  • 4013364245846
  • 1 pc(s)
  • 782 050
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection dev. f. light detection by means of fibre optic sensors
      Electronic detection device for an arc fault protection system
      for connecting 3 fibre optic sensors.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine and status indication via LED display. 
      Supply voltage:	                        18 - 72 V d.c.
      Power consumption:			5 W 
      Number of optical inputs:		3
      Relay outputs:		                4 floating
      			5A, 250 V a.c./d.c.
      

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD FS BAAA
      Part No.: 782 050

      or equivalent.
      Installation Instructions
      Certificates
      G616001
      CE_DSRT_DD
      CAD-Data for registered Users
      782050.stp
      782050.igs
      782050.jt
      782050.dwg
      782050m_D.dxf
  • DSRT DD FS AAAA
  • 782 051
  • 92-265 V AC / DC
  • IP 50
  • IP 20
  • 177 x 52 mm
  • 157 x 45 x 164 mm
  • S1, S2, S3 (fibre optic sensor (DSRT FS) can be connected per channel)
  • 24 V d.c., 3 mA (BI1, BI2)
  • Up to 250 V a.c./d.c. 5 A (T1, T2, T3, T4)
  • 24 V d.c. 20 mA (B01)
  • –35 °C ... +70 °C
  • 7 ms
  • < 3-4 ms with DSRT QD II
  • VdS
  • 851 g
  • 4013364245853
  • 1 pc(s)
  • 782 051
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Electronic detection system for light detection with fibre optic sensors
      Electronic detection device for arc fault protection systems
      for connecting 3 fibre optic sensors.
      Installation in the switchgear cabinet door.
      Automatic self-monitoring routine and status indication via LED display. 
      Supply voltage:	                    80 - 265 V a.c./d.c.
      Power consumption:			5 W 
      Number of optical inputs:		3
      Relay outputs:		                4 floating
      			5A, 250 V a.c./d.c.
      

      delivery and installation.

      Brand: DEHN
      Type: DSRT DD FS AAAA
      Part No.: 782 051

      or equivalent.
      Installation Instructions
      Certificates
      G616001
      CE_DSRT_DD
      CAD-Data for registered Users
      782050.stp
      782050.igs
      782050.jt
      782050.dwg
      782050m_D.dxf

Point Sensor

DSRT PS point sensor for arc detection. Serial connection of max. 3 sensors at each sensor input of DSRT DD CPS and DSRT DD PS devices.


Specifications

Type
Part No.
Dimensions (L x W x H)
Fixing holes
Lower response threshold (Iparc)
Detection radius
Max. distance to the arc fault
Sensor wiring
Sensor cable specification
Max. sensor cable length per sensor cable
Degree of protection
Operating temperature (TU)
Approvals
Weight
GTIN
PU
Part No.

Fibre Optic Sensor

DSRT FS fibre optic sensor for arc detection. Connection of one sensor at each sensor input of DSRT DD FS devices.


Specifications

Type
Part No.
Sensor length
Active sensor length
Diameter
Bending radius
Lower response threshold (Iparc)
Detection radius
Max. distance to the arc fault
Operating temperature (TU)
Weight
GTIN
PU

Quenching Device QD II

Quenching device for direct connection to DSRT DD CPS and DSRT DD PS detection devices.


Specifications

Type
Part No.
Rated operating voltage (Ue)
Rated short-time withstand current (Icw)
Rated peak withstand current (Ipk)
Standard
Dimensions (H x W x D)
System configurations
Degree of protection
Approvals
Weight
GTIN
PU

Fibre Optic Cable

Prewired fibre optic cables for connecting DSRT DD CPS, DSRT DD PS detection devices and DSRT QD II quenching device units.
1 set = 2 pieces


Specifications

Type
Part No.
Length
Diameter
Approvals
Weight
GTIN
PU
  • DSRT LWL 0.75
  • 782 020
  • 0.75 m
  • 2.2 mm
  • VdS
  • 10 g/Sa
  • 4013364236509
  • 1 Sa
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      Assembled fibre optic cable, 0.75 m
      Assembled optical fibre cable for connecting DSRT DD CPS, DSRT DD PS detection devices with DSRT QD IIquenching devices or DSRT LWL U fibre optic converters with DSRT QD II quenching devices
      Length: 0.75 m 

      delivery and installation.

      Brand: DEHN
      Type: DSRT LWL 0.75
      Part No.: 782 020

      or equivalent.
      Installation Instructions
      Certificates
      G616001
  • DSRT LWL 2.00
  • 782 022
  • 2 m
  • 2.2 mm
  • VdS
  • 20 g/Sa
  • 4013364236516
  • 1 Sa
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      Pre-assembled fibre optic cable, 2.00 m
      Assembled optical fibre cable for connecting DSRT DD CPS, DSRT DD PS detection devices with DSRT QD II quenching devices or DSRT LWL U fibre optic converters with DSRT QD II quenching devices
      Length: 2.00 m

      delivery and installation.

      Brand: DEHN
      Type: DSRT LWL 2.00
      Part No.: 782 022

      or equivalent.
      Installation Instructions
      Certificates
      G616001
  • DSRT LWL 4.00
  • 782 024
  • 4 m
  • 2.2 mm
  • VdS
  • 36 g/Sa
  • 4013364237193
  • 1 Sa
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      Pre-assembled fibre optic cable, 4.00 m
      Assembled optical fibre cable for connecting DSRT DD CPS, DSRT DD PS detection devices with DSRT QD II quenching devices or DSRT LWL U fibre optic converters with DSRT QD II quenching devices
      Length: 4.00 m

      delivery and installation.

      Brand: DEHN
      Type: DSRT LWL 4.00
      Part No.: 782 024

      or equivalent.
      Installation Instructions
  • DSRT LWL 8.00
  • 782 028
  • 8 m
  • 2.2 mm
  • VdS
  • 66 g/Sa
  • 4013364237223
  • 1 Sa
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      Pre-assembled fibre optic cable, 8.00 m
      Assembled optical fibre cable for connecting DSRT DD CPS, DSRT DD PS detection devices with DSRT QD II quenching devices or DSRT LWL U fibre optic converters with DSRT QD II quenching devices
      Length: 8.00 m

      delivery and installation.

      Brand: DEHN
      Type: DSRT LWL 8.00
      Part No.: 782 028

      or equivalent.
      Installation Instructions

Accessories

Fixing clip for point sensors

Fixing clip for securing the DSRT PS point sensor in the switchgear cabinet.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Hole pitch
Hole Ø
Weight
GTIN
PU

Foam rubber

For fibre optic sensors DSRT FS.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Length
Diameter
Weight
GTIN
PU

Fixing clip

For fibre optic sensors DSRT FS.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Diameter
Mounting bore
Weight
GTIN
PU