Frequency relay with fixed delay, 1 C/O output, and 40-70 Hz monitoring range.

MI81BJ is a frequency monitoring relay that supervises system frequency and trips when it deviates beyond set limits. It supports 50/60 Hz networks and uses a 1 C/O (SPDT) rated 5 A at 250 VAC / 30 VDC.

Stock Code: MI81BJ

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The GIC MI81BJ is a frequency monitoring relay designed to protect systems from under and over frequency faults with fixed timing response.

🔧 Technical Highlights:

  • Functions: General function not specified

✅ Benefits:

  • Prevents equipment malfunction due to frequency instability
  • Compact design with wide signal compatibility
  • Quick response with fixed time logic for critical loads

🚀 Applications:

  • Inverter-fed motor drives
  • Power conditioning systems
  • Renewable and off-grid energy setups

MI81BJ offers precision frequency protection for voltage-sensitive equipment.

FAQs

  • Q: How is this product typically installed?
    A: It is intended for DIN Rail in industrial control cabinets.
  • Q: Where is it commonly used?
    A: It is used in automation and control panels where dependable switching, monitoring, or indication is required.
Supply Voltage110-230Vac
Output Relay / ChannelsSPCO
Output Relay Rating5A @ 230V
MountingDIN Rail
Size22.5mm
ProtectionIP20, IP40
Weight0.15
Type File Name
Data Sheet frequencymonitoringrelays.pdf
Instruction Manual Instruction Manual_Frequency Monitoring.pdf

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