The DLMUBRAAA is a 3-phase voltage monitor in the DLMU Series, designed for voltage protection in 200 to 480VAC systems. It features isolated SPDT and NO alarm relay contacts rated at 10A resistive at 240VAC and 8A resistive at 277VAC, with automatic detection of 50/60Hz and no neutral connection required. It provides adjustable time delays of 1 to 30 seconds for trip delay and 0.6 to 300 seconds for staggered restart, along with adjustable voltage unbalance trip limits of 2 to 10%. The unit trips in 200ms on phase loss or reversal and automatically resets upon fault correction. Mounting is via surface mounting with two #8 (M4 x 0.7) screws or snap-on 35mm DIN rail, and its dimensions are 110mm H x 75mm W x 50mm D. It complies with ASME A17.1 Rule 210.6 and NEMA MG1 14:30, 14:35, and meets IEEE C62.41-1991 Level B surge requirements.
The DLMU Series is a universal voltage, 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, SPDT and 2A alarm output 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.
Voltage Asymmetry, Voltage Sensing AC, Phase Loss 200 ~ 480VAC
Industrial Relays 120V 2-20A 0.08s CURRENT SENSOR 2s
| Littelfuse, Inc. | Quarktwin Technology Ltd. | VAST STOCK CO., LIMITED | |
|---|---|---|---|
| Product Category | Electromechanical Relays | Protective Relays and Monitoring Relays | Electromechanical Relays |
| Product Number | DLMUBRAAA | DLMUBRAAA | DLMUBRAAA |
| Product Name | DLM Series – Voltage Monitor | Monitor - Relay Output | Industrial Relays |
| Mounting | DIN; Surface mount with two #8 (M4 x 0.7) screws or snap on 35mm DIN rail |
