SCHNEIDER ELECTRIC RM35UB330

Schneider Electric 3-Phase Voltage Monitoring Relay 220-480V AC RM35UB330

Description

The Schneider Electric RM35UB330 is a multifunctional 3-phase voltage control relay from the Zelio Control series. It is designed to monitor 3-phase power supplies and protect equipment against overvoltage and undervoltage conditions. With a wide measurement range of 220 to 480V AC and adjustable settings for thresholds and time delays, this relay provides reliable protection for motors, pumps, and other critical industrial loads. Its compact, DIN-rail mountable design ensures easy installation in control panels.

Specifications

• Manufacturer: Schneider Electric
• Part Number: RM35UB330
• Product Range: Zelio Control
• Function: 3-Phase Voltage Control (Overvoltage & Undervoltage)
• Measurement Range: 220 to 480 V AC, 50/60 Hz
• Output Contacts: 2 x C/O (Changeover)
• Contact Rating: 5 A / 250 V AC
• Mounting Type: 35 mm DIN Rail

Label Info

• L1/L2/L3: 3×220..480V AC ~ 50/60Hz
• R: 5A/250V~
• AC 15: 3A/250V
• DC 13: 2A/24V
• Ith: 5A

Application

This relay is widely used in industrial automation and control systems to protect 3-phase motors, HVAC systems, and other machinery from voltage fluctuations that can cause damage and downtime. It is suitable for applications requiring precise voltage monitoring and automatic fault response.

Country of Origin

Made in Indonesia.

CO2 Impact

By purchasing this reused component, you are contributing to a circular economy and helping to avoid approximately 6.0 kg of CO2 emissions associated with the production of a new unit. This is comparable to the savings of driving a standard car for 30 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
What is the function of the Tt1 and Tt2 adjustments on the RM35UB330?

Answer: Tt1 and Tt2 are time delay settings. Tt1 is the time delay for fault detection, adjustable from 0.1 to 30 seconds, preventing nuisance tripping from transient voltage dips or spikes. Tt2 is typically a start-up inhibit timer, though its specific function can vary; refer to the datasheet for precise application details.

Question?
Can this relay monitor a single-phase supply?

Answer: While designed for three-phase systems, it can monitor a single-phase supply by connecting the single phase and neutral across all three input terminals (L1, L2, L3). However, for dedicated single-phase applications, a specific single-phase monitoring relay might be more suitable.

Question?
How do I set the overvoltage and undervoltage trip points?

Answer: The overvoltage (>U) and undervoltage (

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Last Update: Friday, March 13, 2026