The DLMUBNAAN is a 3-phase voltage monitor in the DLMU Series, detecting phase loss, reversal, over/under voltage, unbalance, and frequency deviations. It features an isolated SPDT output relay rated at 10A resistive at 240VAC and 8A at 277VAC, with a 2A NO alarm contact. No restart delay is provided; a 0.6-second initialization delay applies on power-up. Line voltage range is 200-480VAC, supporting delta and wye systems without neutral connection. Voltage unbalance trip is adjustable from 2% to 10%, and trip delay is adjustable from 1 to 30 seconds. Mounting is via 35 mm DIN rail or surface screw installation. Dimensions are 110 mm H × 75 mm W × 50 mm D. Operating temperature is -40°C to 60°C. Compliance includes NEMA MG1 14:30, 14:35 and ASME A17.1 Rule 210.6.
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 0.150-7s CURRENT SENSOR 1s
| Littelfuse, Inc. | Quarktwin Technology Ltd. | VAST STOCK CO., LIMITED | |
|---|---|---|---|
| Product Category | Electromechanical Relays | Protective Relays and Monitoring Relays | Electromechanical Relays |
| Product Number | DLMUBNAAN | DLMUBNAAN | DLMUBNAAN |
| 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 |
