The DLMUBLAAA is a 3-phase voltage monitor for 200-480VAC systems, detecting phase loss, reversal, over/undervoltage, unbalance, and frequency deviations. It features a lockout restart delay to prevent short cycling after faults. Output includes an isolated 10A SPDT relay and a 2A NO alarm contact. Trip delay and voltage unbalance are adjustable (1-30s and 2-10%, respectively). Phase loss is detected within 200ms. Mounting is surface or 35mm DIN rail, with dimensions of 110 mm H × 75 mm W × 50 mm D. It automatically senses 50/60Hz, offers 2500V RMS isolation, and operates from -40°C to 60°C. Compliant with ASME A17.1 and NEMA MG1 14:30, 14:35.
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 0.5-5A 0.150-7s 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 | DLMUBLAAA | DLMUBLAAA | DLMUBLAAA |
| 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 |
