Details
N Series
DTL Overcurrent (MH) – OA 703
The Overcurrent Relay OA 703 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 ROA 207 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 ROA 207 is designed as a universal overcurrent protective relay, integrating selectable time overcurrent characteristic curves. With digital processing of input values, the ROA 207 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 ROA 207 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) – REA 200n
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 REA 200 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)
E Series
DTL Overcurrent (MH) – OA 703e
A similar, but simplified version of MH DTL overcurrent relay OA 703, the OA 703e provides elementary protection functions excluding the MTB fault indication system.
Features
- Trip status indication for individual phases
- Tamper-proof design for setting protection
- Type tested* for EMC compliance in acc. With IEC 61000
- High immunity to electrical interference (tested to 2.5GHz)
- Type tested in acc. With IEC 60255*
MH OA 703e Operation and Installation Guide V1
IDMTL Overcurrent (MH) – ROA 207e
A similar, but simplified version of MH IDMTL overcurrent relay ROA 207, the ROA 207e provides elementary protection functions excluding the MTB fault indication system.
Features
- Designed with LED display
- Added security against nuisance trip handling
- Manual test button for relay operation checking
- 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 overvoltages
- High set mode is incorporate for instantaneous protection
- Tamper-proof design for settings protection
- Serial interface RS485 for Modbus RTU communication (Optional)
MH ROA 207e Operation and Installation Guide V1
Combine IDMTL Overcurrent and Earth Fault (MH) – REA 200e
A similar, but simplified version of MH combined IDMTL overcurrent and earth fault relay REA 200, the REA 200e provides elementary protection functions excluding the MTB fault indication system.
Features
- Designed with LED display
- Added security against nuisance trip handling
- Manual test button for relay operation checking
- 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 overvoltages
- High set mode is incorporate for instantaneous protection
- Tamper-proof design for settings protection
- Serial interface RS485 for Modbus RTU communication (Optional)