FAQ No. FAQ01565
Question
Can the SE Motor Protective Relay
be used in an inverter circuit?
Answer
No, it cannot. The SE is designed for sine wave (50/60 Hz) motor
protection. If the SE is used in an inverter circuit, errors will occur in
the overloaded element, sometimes causing unnecessary operation in
open-phase or reverse-phase elements. For this reason, 3-element
protective functions cannot be used in an inverter circuit.
Use the K2CM Motor Relays or
K2MR Multi Motor Relays for motor protection when controlling the motor
with an Inverter.
Other Measuring & Monitoring Relay
FAQs
 Can you connect the K2CU control power supply from a circuit other than the heater circuit?
How do you calculate the heater current?
What kind of precautions are there for using the K2CM in an inverter circuit?
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