Products

Arrester-protected Measuring System

NZStrain gauges and a host of other transducers are used in structures for long-term maintenance control as well as for safety control during construction at civil engineering and other sites. These transducers need to be centrally controlled and are normally connected by cables running between the Instrument room and Data Loggers at a site office separated by anywhere from several tens of meters to hundreds of meters. The Data Logger and other connected transducers may be damaged by instantaneous high voltages in cables caused by lightning conduction even if lightning strikes near rather than directly on power or instrument cables laid outdoors.

Our arrester system attaches a special transducer cable arrester (NZ-6B) as well as an arrester unit (NZR-7B/NZ-7C) to the switching box and Data Logger cable to ground lightning strikes in order to minimize damage. An insulated transformer with a small static electricity capacity is used as a power supply cable measure to protect instruments from instantaneous high voltages. The system was developed based on many years of experience and field-proven performance in order to minimize instrument damage.


More Information

Anti-strain measurement lightning PDF open PDF file

Applied instrument

  • DataLogeer TDS-630,TDS-530,TDS-303,TDS-602
  • Switching Box ASW-30C,ASW-50C,SSW-50D,SSW-10MC

Cases connected to the unit arrester

Example 1: The first stage extended from the instrument between the switch box

Example 2: between the instrument and switch boxes, switch boxes extend between each

Example 3: extension of the network between the network and inter-module

Arrester protective equipment

Protection from lightning is to guide the instrument and transducer. In lightning-prone area, and receive cables such as lightning-induced instrument and switch boxes can cause trouble with the instrument and the induced voltage converter. When installing the instrument and transducer, to extend the cable between switch box and connect the NZR-7B/NZ-7C instrument, the cable between the converter and the switch box to connect to NZ-6B, the cable when the earth was a lightning-induced currents induced (Earth) to sink to protect the instrument and transducer.

NZR-7AConnection between the instrument and switch boxes, preventing the induced current disconnect between each device Discontinued

NZR-7BConnection between the instrument and switch boxes, preventing the induced current disconnect between each device

NZ-7BConnection between the instrument and switch boxes, induced currents dissipate Discontinued

NZ-7CConnection between the instrument and switch boxes, induced currents dissipate

NZ-6BConnection between the instrument and switch boxes, induced currents dissipate

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