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Overvoltage Protection for Power Distribution Equipment

Electric power distribution is electricity power being carried from the transmission system to the consumers. This final stage of delivery of electric power distributes power through substations that connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 35 kV with the use of transformers.

Primary distribution lines carry this medium voltage power to distribution transformers located near the consumer premises. Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment or household appliances. All of the equipment used in this process needs protection from surges caused either by lightning activity or switching events.

Products listed below represent examples of just a few of the assemblies we offer. If you don't see the asembly or specification you require listed below, please contact our technical team as we will be able to design a bespoke solution to suit your application.

  • Max Continuous Operating Voltage 215V Uc rms
  • Reference Voltage @ 1.0mA DC >350V
  • Max Residual Voltage @ 10kA 8/20μs <800V
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL03 - Low voltage Sheath Voltage Limiter - 215V Uc rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 310V Uc rms
  • Max Rated Voltage (2s/50Hz) 400V Uc rms
  • Max Residual Voltage @ 10kA 8/20μs <1.2kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL04 - Sheath Voltage Limiter - Low Voltage - 400V rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 490V Uc rms
  • Reference Voltage @ 1.0mA DC >800V
  • Max Residual Voltage @ 10kA 8/20μs <2500V
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL06 - Low Voltage Sheath Voltage Limiter - 490V Uc rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Continuous Operating Voltage 625V Uc rms
  • Max Rated Voltage 800V Uc rms
  • Max Residual Voltage @ 10kA 8/20μs <2.3kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL08 - Sheath Voltage Limiter - Low Voltage - 800V Uc rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 750V Uc rms
  • Max Rated Voltage 960V Uc rms
  • Max Residual Voltage @ 10kA 8/20μs <3.1kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL9.6 - Low voltage Sheath Voltage Limiter -  960V rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 440V Uc rms
  • Nominal Discharge Current In 10000A
  • Typical Capacitance 30pF
  • Typical 50Hz Sparkover <2.5kVrms
  • Robust ABS Housing with Epoxy Backfill

SBM440 - Low voltage, low capacitance MOV Arrester without Gap - 440V Uc rms. This low capacitance surge arrester uses Metal Oxide Varisotor (MOV)  technology and was desined for use in transformer applications, but is also suited to other higher frequency applications. It is suitable for indoor use, and is housed in robust ABS with 2 part epoxy backfill. 

  • Max Continuous Operating Voltage 660V Uc rms
  • Nominal Discharge Current In 10000A
  • Typical Capacitance 25pF
  • Typical 50Hz Sparkover <2.5kVrms
  • Robust ABS Housing with Epoxy Backfill

SBM660 -  Low voltage MOV Arrester without Gap -  660V Uc rms. This low capacitance surge arrester uses Metal Oxide Varisotor (MOV)  technology and was desined for use in transformer applications, but is also suited to other higher frequency applications. It is suitable for indoor use, and is housed in robust ABS with 2 part epoxy backfill. 

  • For Use on AC or DC Supply
  • Max Continuous Operating Voltage Uc 415V rms
  • Rated Voltage Uc 500V rms
  • Max Discharge Current Imax 30kA 8/20μs
  • Brass M8 Terminations for Mounting Any Orientation

LVA415-5 - Low Voltage Surge Arrester - 415V Uc rms. Designed for use on either AC or DC supply lines as an effective means of providing protection against lightning and switching induced overvoltages. For interior use, housed in robust UV stable ABS casing with brass M8 terminations. Can be mounted in any orientation.

  • UV Resistant PVA Housing for Outdoor Use
  • System Voltage up to 1000V
  • Frequency 48-62 Hz
  • Operating Temperature -40oC to +55oC
  • Continuous Operating Voltage Uc rms 280V to 660V

PDLV Series - Low Voltage Surge Arresters - 280V to 660V Uc rms. The PDLV Series is a range of arresters intended for the protection of low voltage systems against overvoltages caused by lightning strikes and switching operations. Housed in UV resistant PVA suitable for outdoor use at temperatures between -40oC to 55oC

  • Integrated Thermal Disconect
  • UV Resistant PVA Housing for Outdoor Use
  • Max Current Discharge Imax 25kA and 40kA
  • Operating Temperature -40oC to +70oC
  • Continuous Operating Voltage Uc rms 280V to 660V

PDLV-D - Low Voltage Surge Arrester Disconnect - 280V to 660V Urms. With integrated thermal disconnect, these arresters are intended for protection of low voltage systems against overvoltages caused by lightning strikes and switching operations. In the event of long duration overvoltage, the arrester will disconnect itself from the system.

  • Max Continuous Operating Voltage 440V Uc rms
  • Nominal Discharge Current In 10000A
  • Typical Capacitance 10pF
  • Typical 50Hz Sparkover <2.5kVrms
  • Robust ABS Housing with Epoxy Backfill

SBMG440 - Low voltage, low capacitance Surge Arrester - 440V Uc rms. This low capacitance surge arrester uses Metal Oxide Varisotor (MOV) + spark gap technology and was desined for use in transformer applications, but is also suited to other higher frequency applications. It is suitable for indoor use, and is housed in robust ABS with 2 part epoxy backfill. 

  • Max Continuous Operating Voltage 660V Uc rms
  • Nominal Discharge Current In 10000A
  • Low Capacitance - 25pF
  • Typical 50Hz Sparkover <2.5kVrms
  • Robust ABS Housing with Epoxy Backfill

SBMG660 - Low Capacitance Gapped Arrester - Low Voltage - 660V Uc rms. This low capacitance surge arrester uses Metal Oxide Varisotor (MOV) + spark gap technology and was desined for use in transformer applications, but is also suited to other higher frequency applications. It is suitable for indoor use, and is housed in robust ABS with 2 part epoxy backfill. 

  • Max Continuous Operating Voltage 1250V Uc rms
  • Max Rated Voltage 1600V Uc rms
  • Max Residual Voltage@ 10kA 8/20μs <4.5kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL16 - 1.6kV rms medium voltage Sheath Voltage Limiter - . Designed to protect  power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby fencing, pipelines or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 1680V Uc rms
  • Max Rated Voltage 2100V Uc rms
  • Max Residual Voltage @ 10kA 8/20μs <6.2kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL21 - Medium voltage Sheath Voltage Limiter - 2.1kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 2170V Uc rms
  • Max Rated Voltage 2800V Uc rms
  • Max Residual Voltage @ 10kA 8/20μs <8.4kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL28 - Medium voltage Sheath Voltage Limiter - 2.8kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 2800V Uc rms
  • Max Rated Voltage 3000V Uc rms
  • Max Residual Voltage@ 15kA 8/20μs <10.6kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL30 - Medium voltage Sheath Voltage Limiter - 3kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 2500V Uc rms
  • Max Rated Voltage 3200V Uc rms
  • Max Residual Voltage @ 15kA 8/20μs <9kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL32 - Medium Voltage Sheath Voltage Limiter - 3.2kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 4000V Uc rms
  • Max Rated Voltage 4500V Uc rms
  • Max Residual Voltage @ 15kA 8/20μs <12.5kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL45 - Medium voltage Sheath Voltage Limiter -  4.5kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Max Continuous Operating Voltage 4700V Uc rms
  • Max Rated Voltage 5000V Uc rms
  • Max Residual Voltage@ 15kA 8/20μs <15.5kV
  • Customisable Mounting Bracket Design
  • 2 Part Epoxy Coating for Indoor/Outdoor Use

SVL50 - Medium voltage Sheath Voltage Limiter -  5kV  rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • 3kV to 12kV Ur rms
  • Various Mounting Bracket Options
  • Meets Requirements of CIGRE Recommendations
  • Meets IEC 60099-4
  • Nominal Discharge Current 10kA 8/20

PSVL Series - Medium Voltage Sheath Voltage Limiters - 3kV to 12kV Ur rms. Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • Rated Voltage 1kV to 12kV Ur rms
  • Continuous Operating Voltage 0.9kV to 9.6kv Uc rms
  • Long Duration Current Impulse 2ms 600A
  • Suitable for Fitting Within Link Box
  • Stainless Steel, Aluminium or Brass Terminations

PDSVL60 Series - Sheath Voltage Limiters - Medium Voltage - 1kV to 12kV rms.  Designed to protect overhead or underground power transmission lines from induced overvoltages caused by lightning or switching events, induced from nearby pipelines, fencing or other physical structures by cross bonding the cable sheath and ground continuity conductor.

  • 10kA Nominal Discharge Current
  • High Mechanical Strength
  • Excellent Environmental Resillience 
  • Stable Operating Characteristics
  • Range of Mounting Accessories

PDISA Series - Medium/High voltage Indoor surge arrester - 10kV to 15kV Ur rms. This series of 10kA, Class 1 surge arresters are designed for the protection of internal installations, and meed the requirements of CIGRE recommendations and IEC 60099-4. Offers high mechanical strength, stable operating characteristics and a range of mounting options.

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