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MTL LC30 Range Specialist Surge Protection Products

Brand: MTL Instruments

The LC30 surge protection device protects load cell and weighing system installations from possible malfunctions, or damage to individual strain-gauge bridges of associated electronic instrumentation etc., caused by severe overvoltages or impulse currents on signal cabling.

Fully solid state, the LC30 clamps incoming surges immediately without causing undue leakage losses under normal conditions.

Once the surge has passed, the device automatically resets to the passive state, allowing normal operations to continue.

The advanced protection concept used in the LC30 also eliminates the expensive additional earthing systems specified by other suppliers so field installation is very simple indeed.

The LC30 device is non-voltage producing, non energy storing ‘simple apparatus’ and as such, can be used in hazardous areas with appropriate self generated system documentation.

The LC30 is also certified for use in legal metrology applications.
Features
  • Protects Load Cells, Weighbridges, Process Weighing and Silos
  • Certified for Use in Legal Metrology Applications
  • Reliable, High Surge Absorption Capacity
  • Easy Filed Installation in Rugged Weatherproof Enclosure
  • Can be Used in Intrinsically Safe Circuits without Further Certification

Specifications

Maximum Surge Current

  • 10 kA

Leakage Current

  • 10 μA at 32 Vdc

Limiting Voltage

  • 80 V (after 6 kV/3kA IEC 61000-4-5 combination wave test)

Nominal Excitation Voltage

  • 20 Vac or DC

Maximum Excitation Voltage

  • 22 Vac or 32 Vdc

Protection

  • Dust and watertight to IEC 60529:IP67
  • GRP enclosure

Ambient Temperature Limits

  • -4° to +140° F (-20° to +60° C) working
  • -22° to +158° F (-30° to +70° C) storage

Humidity

  • 5 to 95 % RH, Non-Condensing

Connections

  • Input/output: 6-wire plus screen plus earth (ground)

Maximum Terminal Conductor Size

  • 1.5 mm*2 (15 AWG) Glands (IP68) provided for cable sizes 5 to 10 mm diameter
  • Main earth connection, M8 external stud Mounting Internal 0.28" (7 mm) diameter through-holes

Weight

  • 3.3 lb (1.5 kg)

EMC Compliance

  • To generic Immunity Standards, EN 50082, part 2 for industrial environments

Documentation

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