Voltage-controlled smart decoupling device VCSD

Smart decoupling device VCSD

  • VCSD: Voltage Controlled Smart Decoupling Device
  • Protection in case of transient, temporary and long-duration overvoltages
  • Does not negatively affect cathodic protection equipment
  • Adjustable response threshold for flexible use in a wide range of applications and operating states

Version

VCSD 40 IP65: Voltage-controlled smart decoupling device with adjustable response threshold

Description

The smart decoupling device VCSD 40 IP65 is a short-circuiting switch which is controlled by overvoltage and limits long-duration, temporary and transient overvoltages. With the exception of direct currents, the VCSD is capable of discharging all interference voltages and limiting them to a preset value without negatively affecting the d.c. potential (cathodic protection potential). It limits the effects of dangerous high overvoltages in its immediate vicinity to a safe level.

Detail 1

Limiting behaviour of the VCSD
Limiting behaviour of VCSD 40 IP65 in the time range
Transient overvoltages are limited to values < 1.25 kV (time range: up to 1 ms).
Temporary overvoltages are limited to values < 940 V depending on the duration (time range: 1 ms to 200 ms).
Long-duration overvoltages are limited to values between 3 and 50 V a.c. (adjustable) (time range: > 200 ms).

Functional description
Thanks to the coordinated and tested interaction of the functional units within the VCSD, the following overvoltage-related effects can be prevented:

Undefined, lightning-related puncture and flashover at insulating clearances
Lightning-related overvoltage is limited and the associated lightning currents are discharged to local earth.

Dangerous touch voltages at accessible places
Dangerous touch voltages are limited to below the maximum permissible touch voltage for the duration of their occurrence.

Reduction of a.c. corrosion caused by a.c. interference
Technical alternating currents between 16.7 Hz and 60 Hz can be permanently discharged to low-impedance earth electrodes without negatively affecting the cathodic protection potential on long-distance pipelines.

Detail 2

VCSD 40 IP65 – "intelligent coupling device"
Monitoring / controlling
Due to the digital and analogue interfaces, the VCSD 40 IP65 can be externally controlled, device faults can be displayed and discharge currents can be signalled in the form of a 4 – 20 mA signal (scaled to 0 – 40 A).

Fields of application
The VCSD 40 IP65 is ideally suited for pipelines which are influenced by lightning strikes, electric railways or high-voltage lines. Typical fields of application are remote insulated pipeline sections, cathodically protected containers / storage tanks, open earthing of cable shields at accessible places or the corrosion-free interconnection of isolated earth-termination systems such as the foundation earth electrodes of a building and an isolated signal ground or railway earth electrode.
Advantages of the VCSD 40 IP65 are the flexible and controllable use in different fields of application, the high discharge capacity as well as a tested, comprehensive, coordinated protection solution from the surge protection specialist DEHN.

Models

VCSD 40 IP65

VCSD 40 IP65

Basic circuit diagram VCSD 40 IP65Dimension drawingVCSD 40 IP65

Voltage-controlled smart decoupling device with adjustable response threshold for flexible use in a wide range of systems.


Specifications

Type
Part No.
Transient discharge current (10/350 µs)
Transient discharge current (8/20 µs)
Temporary discharge current (16.7 Hz, 50 Hz, 60 Hz)
Temporary discharge current (16.7 Hz, 50 Hz, 60 Hz)
Long-duration discharge current (16.7 Hz, 50 Hz, 60 Hz)
Transient limiting voltage (up to 1 ms)
Temporary limiting voltage (a.c.rms) (1 ... 20 ms)
Temporary limiting voltage (a.c.rms) (20 ... 100 ms)
Temporary limiting voltage (a.c.rms) (100 ... 200 ms)
Long-duration limiting voltage (a.c.rms) (> 200 ms)
Frequency range (a.c.)
Max. permissible voltage (d.c.) in discharge mode
Max. leakage current in non-discharge mode Tamb = 20 °C
Voltage supply (internal)
Voltage supply (external, optional)
Operating temperature range (TU)
Terminal 1, 2
PE terminal
Enclosure material
Degree of protection
Digital output / type of contact
Switching capacity (a.c.) (digital OUT)
Switching capacity (d.c.) (digital OUT)
Digital input / type of contact
Contact data
Cross-sectional area of the signal lines
Battery
Dimensions
Weight
GTIN
PU
Part No.
*1) Derating depends on the "biasing current" (long-duration discharge current) and on the ambient temperature
*2) Derating depends on the ambient temperature
See instructions for use and installation instructions
  • VCSD 40 IP65
  • 923 401
  • 100 kA
  • 100 kA
  • 1.1 kArms (up to 200 ms) *1)
  • 500 Arms (up to 1 s)
  • 45 Arms (permanently) *2)
  • ≤ 1.25 kV
  • ≤ 940 V (1 kV as per AfK 3)
  • ≤ 660 V (1 kV as per AfK 3)
  • ≤ 400 V (1 kV as per AfK 3)
  • max. 50 V (adjustable from 3 to 50 V)
  • 16.7 Hz, 50 Hz, 60 Hz
  • ±7V d.c.
  • max. 500 µA
  • by external voltage; 9 V battery integrated
  • 9 ... 32 V d.c., min. 0.5 A
  • -40 °C ... +80 °C
  • M10 screw connections, cross-sectional area: 35 ... 50 mm²
  • M8 (external)
  • painted sheet steel, RAL 7035, inspection door with safety glass
  • IP 65
  • make contact
  • max. 230 V / max. 0.6 A
  • max. 220 V / max. 2 A / max. 60 W
  • make contact
  • max. 9 V / 1 mA / 100 ohms
  • max. 2.5 mm2 solid / flexible
  • 9 V block battery, lithium
  • 400 x 300 x 150  mm
  • 12,15 kg
  • 4013364237766
  • 1 pc(s)
  • 923 401
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram VCSD 40 IP65
      open PDF
      Dimension drawing
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      VCSD Voltage-controlled smart decoupling device
      Voltage-controlled smart decoupling device for
      protection in case of transient, temporary and long-term overvoltages
      Transient discharge current: (10/350 s): 100 kA
      Temporary discharge current (16.7 Hz, 50 Hz, 60 Hz):  
                      1.1 kArms (up to 200 ms)
      Long-term discharge current (16.7 Hz, 50 Hz, 60 Hz):  
                      45 A (permanently)
      Transient limiting voltage (up to 1 ms):	1.25 kV
      Temporary limiting voltage (ACrms) (1 ... 20 ms):	
      940 V (1 kV as per AfK 3)
      Temporary limiting voltage (ACrms) (20...100 ms):
      660 V (1 kV as per AfK 3)
      Temporary limiting voltage (ACrms) (100...200 ms):	
      400 V (1 kV as per AfK 3)
      Stationary limiting voltage (ACrms) (> 200 ms): 
      max. 50 V (adjustable from 3 ... 50 V)
      With digital and analogue inputs/outputs 
      for remote monitoring and control 

      delivery and installation.

      Brand: DEHN
      Type: VCSD 40 IP65
      Part No.: 923 401

      or equivalent.
      Installation Instructions
      Certificates
      CE_VCSD_40_IP65
      CAD-Data for registered Users
      923401m_D.dxf

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DGP M – 100 kA N-PE Spark-Gap-Based Protection Module

N-PE spark-gap-based protection module for all devices of the modular DEHNgap M family.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Max. continuous operating voltage (a.c.) (UC)
Weight
GTIN
PU
  • DGP M MOD 255
  • 961 010
  • 255 V
  • 170 g
  • 4013364118744
  • 1 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DGP M MOD 255 N-PE spark-gap-based protection module
      N-PE spark-gap-based protection module for all 
      devices of the modular DEHNgap M series
      Type 1 N-PE arrester according to EN 61643-11
      Heavy-duty creepage discharge spark gap
      Fault indication 
      Max. continuous operating voltage: 255 V a.c.
      Lightning impulse current: 100 kA
      Follow current extinguishing capability: 100 kArms at 255 V a.c.

      delivery and installation.

      Brand: DEHN
      Type: DGP M MOD 255
      Part No.: 961 010

      or equivalent.
      Installation Instructions