Model
Voltage Monitoring Relays
Single Phase Current Monitoring Relays
Frequency Monitoring Relays
Earth Fault Relays
Earth Leakage Relay
Reverse Power Relay
Monitoring Relays
- OFS D1
- S2 FMR1
Model
Voltage Monitoring Relays
Current Monitoring Relays
Ground Fault Monitoring Relays
Frequency Monitoring Relays
- OFS D1
- S2 FMR1
Power Monitoring Relays & CBCT
Monitoring Relays
These relays are best suitable for monitoring balanced or unbalanced supplies, either of single phase, 3-phase 3-wire or 3-phase 4 wire loads powered by generators, UPS, stabilizers, inverters, or Mains (by Electricity Boards / Utilities); in AMF panels, PCCs, distribution boards and for power monitoring of individual loads / motors / pumps.
FEATURES
- Fixed/adjustable under/Over trip settings for parameters.
- Fixed/adjustable trip delays and Power On delays
- Built-in or external power supply
- Resetting – Auto or Manual
- Output contacts : 1 CO or 2 CO
- Choice of enclosures (DIN-Rail, Flush)
- Models with Micro-Controller based design
- Use of SMD Technology
- User friendly LED indications
PROTECTIONS / FUNCTIONS
- Under/over Voltage
- Under/Over Current
- Under/Over Frequency
- Reverse Power
- Earth Fault/Ground Fault
- Earth leakage
ORDERING INSTRUCTIONS
- Product Family Name
- Model Name
- System Supply Voltage & Frequency
- Aux. Supply / Control Supply Voltage
- Current input (1A or 5A)
CBCT INSTRUCTIONS
- Primary & Secondary Current.
- Inner Diameter.
- Outer Diameter.
- Minilec Relay Model Name.
FAQs
The terms are often used interchangeably, but there’s a subtle difference:
- Protection Relays are typically designed to operate very quickly (in milliseconds) to isolate a fault and prevent catastrophic damage, like a short circuit.
- Monitoring Relays often guard against “process” faults that are less immediately catastrophic but can cause downtime, inefficiency or long-term equipment damage, like under-voltage, phase loss or a frequency deviation.
Minilec has wide variety of monitoring relays designed for specific tasks:
- Voltage: Over-voltage, under-voltage, loss of voltage, voltage asymmetry (imbalance).
- Current: Over-current, under-current (e.g., for pump run-dry protection).
- Phase: Phase sequence (rotation), phase failure, phase asymmetry.
- Frequency: Deviation from standard frequency (50/60 Hz).
- Insulation: Resistance monitoring to detect insulation failure.
- Temperature: Overtemperature via external sensors.
- Level & Pressure: Monitoring signals from various sensors.
Monitoring relays are a key component of predictive maintenance and operational safety. Minilec Monitoring Relays:
- Prevent Equipment Damage: Shut down a motor before low voltage or phase loss causes it to burn out.
- Reduce Downtime: Alert operators to a problem before it causes a full production line stoppage.
- Ensure Process Integrity: Prevent malfunctions (e.g., ensuring a conveyor belt runs in the correct direction).
- Improve Safety: Monitor for insulation faults that could lead to electric shock.
Anywhere electrical equipment is critical to operations:
- Industrial manufacturing and assembly lines
- HVAC systems for buildings and data centers
- Pump and compressor control panels
- Power generation and backup power systems (gensets, UPS)
- Automated warehouse and conveyor systems
Most modern monitoring relays are configurable. Using buttons, dials, or DIP switches on the front, you can set parameters like:
- Trip Points: The value at which the relay should activate (e.g., trip if voltage drops below 190V).
- Time Delays: A brief delay to prevent nuisance tripping from temporary fluctuations.
- Mode of Operation: Defining what condition the relay should watch for.
Installation involves working with live electrical control circuits. Only a qualified electrician or controls technician should install and configure these devices to ensure they are set up correctly and safely for the intended application.
