Eaton DILM Monitoring Relay for Motor Protection
Monitoring relays protect motors from abnormal operating conditions. RF Manda supplies monitoring relays compatible with Eaton Moeller for use with DILM contactors and motor control systems.
Types of Motor Monitoring
Monitoring relays cover different protection functions:
- Phase monitoring – Phase loss, phase sequence, phase imbalance
- Voltage monitoring – Over-voltage, under-voltage
- Current monitoring – Overload, underload, jam detection
- Temperature monitoring – PTC thermistor input
Phase Monitoring Relays
Phase monitoring relays detect:
- Phase loss (one phase missing)
- Phase reversal (incorrect sequence)
- Phase imbalance (unbalanced voltage)
Typical response time: 0.1-10 seconds, adjustable.
Application: Protect 3-phase motors from single-phasing damage.
Voltage Monitoring Relays
Voltage monitoring relays protect against:
- Under-voltage (motor draws high current, overheating)
- Over-voltage (insulation stress, component damage)
Typical adjustment: 80-120% of nominal voltage.
Application: Generator sets, areas with unstable power supply.
Current Monitoring Relays
Current monitoring relays detect:
- Overload (mechanical jam, bearing failure)
- Underload (pump cavitation, belt breakage)
- Phase current imbalance
Typical adjustment: 50-150% of rated current.
Application: Pumps, fans, conveyors with mechanical issues.
Temperature Monitoring (PTC Input)
PTC thermistor input relays monitor motor winding temperature:
- Compatible with PTC thermistors embedded in motor windings
- Trip when temperature exceeds PTC threshold (typically 130-155C)
- Provides direct motor thermal protection
Application: Motors with embedded PTC sensors, critical motor protection.
Integration with DILM Contactors
Monitoring relays work alongside DILM contactors to provide complete motor protection:
- Monitoring relay detects abnormal condition
- Relay output opens control circuit
- DILM contactor de-energizes, stopping motor
- Alarm signal sent to control system
Catalogue references for the specification above: UVU-NZM undervoltage release for motor protection and phase monitoring circuits and DILM7-01 110VDC contactor, DILM7 frame from the 9A to 1000A DILM series. All are MOQ 100 pcs per SKU, 7-15 day lead time, one free sample per SKU, and are supplied on our own PCBA and housing tooling with AQL 5% inspection available.
Not Infringing
RF Manda monitoring relays are compatible with and replacement for Eaton Moeller products. Not original Eaton products.
【Contact: Joanna@rfmando.com / WhatsApp: +86 189 6031 3731 / Website: https://www.rfmando.com/】
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Frequently Asked Questions
What is the minimum order quantity for this product?
MOQ is 500 pieces per SKU. Free samples are available for qualified B2B buyers to test before bulk ordering.
What is the wholesale price?
Wholesale prices start from $3.5 USD per unit for standard version and $7.5 USD per unit for upgraded version. Volume discounts are available for orders above 1,000 units.
Is this product compatible with major remote brands?
Yes, RF Manda products are compatible with and serve as a replacement for major brands including Somfy RTS, Dooya, LiftMaster, Chamberlain, and others.
What is the lead time?
Lead time is 30 days from order confirmation. Sea freight transit 25-35 days from China to European or North American ports.
How can I order samples?
Contact us at Joanna@rfmando.com or WhatsApp +86 189 6031 3731 to request free samples. We provide samples for qualified B2B buyers.
Do you supply motors or just remotes?
We only supply remotes and related components, no motors. Our product line includes remote controls, contactors, and accessories.
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