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Littelfuse, Inc. Littelfuse HLM Voltage Monitoring Relays Provide Superior Protection HLMUDRAAA

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Littelfuse HLM Voltage Monitoring Relays Provide Superior Protection - HLMUDRAAA - Littelfuse, Inc.
Chicago, IL, United States
Littelfuse HLM Voltage Monitoring Relays Provide Superior Protection
HLMUDRAAA
Littelfuse HLM Voltage Monitoring Relays Provide Superior Protection HLMUDRAAA
The HLMU Series is a universal voltage, encapsulated, 3-phase voltage monitor. It continuously measures the voltage of each of the three phases with microcontroller accuracy and compares the value to preset trip points. It separately senses phase reversal and loss; over, under and unbalanced voltages; and over or under frequency. Protection is assured during periods of large average voltage fluctuations, or when regenerated voltages are present. The unit trips within 200ms when phase loss is detected. Adjustable time delays are included to prevent nuisance tripping and short cycling of sensitive equipment. The isolated, 10A, DPDT relay contacts trip when a phase voltage exceeds the trip limits for the trip delay. Nominal line voltage, voltage unbalance, and time delays are knob adjustable. The phase loss setpoint and the acceptable frequency range are fixed. Both delta and wye systems can be monitored; no connection to neutral is required.See datasheet for operation details.

The HLMU Series is a universal voltage, encapsulated, 3-phase voltage monitor. It continuously measures the voltage of each of the three phases with microcontroller accuracy and compares the value to preset trip points. It separately senses phase reversal and loss; over, under and unbalanced voltages; and over or under frequency. Protection is assured during periods of large average voltage fluctuations, or when regenerated voltages are present. The unit trips within 200ms when phase loss is detected. Adjustable time delays are included to prevent nuisance tripping and short cycling of sensitive equipment. The isolated, 10A, DPDT relay contacts trip when a phase voltage exceeds the trip limits for the trip delay. Nominal line voltage, voltage unbalance, and time delays are knob adjustable. The phase loss setpoint and the acceptable frequency range are fixed. Both delta and wye systems can be monitored; no connection to neutral is required.See datasheet for operation details.

Supplier's Site Datasheet
Monitor - Relay Output - HLMUDRAAA - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Monitor - Relay Output
HLMUDRAAA
Monitor - Relay Output HLMUDRAAA
Voltage Asymmetry, Voltage Sensing AC, Phase Loss 200 ~ 480VAC

Voltage Asymmetry, Voltage Sensing AC, Phase Loss 200 ~ 480VAC

Supplier's Site Datasheet

Technical Specifications

  Littelfuse, Inc. Quarktwin Technology Ltd.
Product Category Electromechanical Relays Protective Relays and Monitoring Relays
Product Number HLMUDRAAA HLMUDRAAA
Product Name Littelfuse HLM Voltage Monitoring Relays Provide Superior Protection Monitor - Relay Output
Mounting Surface mount with one #10 (M5 x 0.7) screw
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