Details

DTL Overcurrent (MH) – OA 703
The Overcurrent Relay OA703 is designed to monitor the respective phase current of the power system and provides a relay operation in event of an over current situation. The ROA207 relay incorporates the MTB fault indication system in advanced protection relaying for system abnormalities. This eliminates the need of an auxiliary supply to provide a fault indication, ensuring enhanced safety.

Features

  • Mechanical Trip Button (MTB) fault indication system
  • No requirement for auxiliary power supply for fault indication
  • Safeguard against automatic reset before fault rectification
  • Trip status indication for individual phases
  • Tamper-proof design for setting protection
  • Type tested for EMC compliance in accordance with IEC 61000
  • High immunity to electrical interference (tested to 2.5GHz)
  • Type tested in accordance with IEC 60255

 

IDMTL Overcurrent (MH) – ROA 207n
Based on digital microprocessor technology, the MH ROA207 is designed as a universal overcurrent protective relay, integrating selectable time overcurrent characteristic curves. With digital processing of input values, the ROA207 offers high measuring accuracy and a wide setting range in fine resolution.

Featuring a first-of-its kind, OLED Display (Organic Light Emitting Diode), the ROA207 provides unparalleled clarity and crisp sharpness, alongside the enhanced functions such as communication interfaces, diagnostic features such as fault data recording with time/date stamp.

Features

  • OLED display for superior readability
  • Redesigned menu navigation for intuitive operation
  • Dual source 85-265V AC/DC for auxiliary supply
  • Streamlined 46mm depth with bezel cover
  • Added security against nuisance trip handling
  • Manual test button for relay operation checking
  • No requirement for axially power supply for fault indication
  • Safeguard against automatic reset before fault rectification
  • Curve selection in accordance with ANSI, IAC, IEC, 1.3/10
    • Normally Inverse (NI)
    • Very Inverse (VI)
    • Extremely Inverse (EI)
    • Short Time Inverse (STI)
    • Moderate Inverse (MI)
  • Trip value recording (4-memory)
  • Integrated surge arrester against transient overvoltage
  • High set mode incorporated for instantaneous protection
  • Tamper-proof design for setting protection
  • Serial interface RS485 for Modbus RTU communication (optional)

 

Combine IDMTL Overcurrent and Earth Fault (MH) – REA200n
The MH REA200 is designed as a universal, digital microprocessor-based protective relay, integrating both the overcurrent and earth fault protection schemes for definite and inverse time characteristics within one compact unit.

Featuring a first-of-its kind, OLED Display (Organic Light Emitting Diode), the REA200 provides unparalleled clarity and crisp sharpness, alongside the enhanced functions such as communication interfaces, diagnostics features such as fault data recording with time/date stamp.

Features

  • OLED display for superior readability
  • Redesigned menu navigation for intuitive operation
  • Dual source 85-265V AC/DC for auxiliary supply
  • Streamlined 46mm depth with bezel cover
  • Added security against nuisance trip handling
  • Manual test button for relay operation checking
  • No requirement for axially power supply for fault indication
  • Safeguard against automatic reset before fault rectification
  • Curve selection in accordance with ANSI, IAC, IEC, 1.3/10
    • Normally Inverse (NI)
    • Very Inverse (VI)
    • Extremely Inverse (EI)
    • Short Time Inverse (STI)
    • Moderate Inverse (MI)
  • Trip value recording (4-memory)
  • Integrated surge arrester against transient overvoltage
  • High set mode incorporated for instantaneous protection
  • Tamper-proof design for setting protection
  • Serial interface RS485 for Modbus RTU communication (optional)