3 Phase DPDT Voltage Monitor w/ Staggered Restart (200-480V)

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. Specifications: Input Voltage (V): 200-240VAC; 340-420VAC; 400-480VAC Input Voltage Maximum (V): 550VAC Input Type: 3-phase delta or wye with no connection to neutral Input AC Line Frequency (Hz): 50/60Hz automatically detected; 240VAC: 50/60Hz; 380VAC: 50Hz; 480VAC: 60Hz Input Phase Sequence: A B C L1 L2 L3 Output Type: Isolated electromechanical relay Output Form: DPDT Output Load Rating (VA): 10A resistive @ 240VAC; 8A resistive @ 277VAC; NO-1/4hp @ 120VAC; 1/3hp @ 240VAC Reset Time (ms): Automatic Response Time (ms): Phase loss: 200ms; Phase reversal: 200ms Restart Delay Range: Adjustable from 0.6-300s; staggered restarting Restart Delay Tolerance (%): 15% Trip Delay Type: Active On: ver/undervoltage voltage unbalance over/under frequency Trip Delay Range: Adjustable from 1-30s Trip Delay Tolerance (%): 15% Overvoltage Trip Voltage (%): 109-113% of the adjusted line voltage Overvoltage Reset Voltage (%): -3% of the trip voltage Undervoltage Trip Voltage: 88-92% of the adjusted line voltage Undervoltage Reset Voltage (%): +3% of the trip voltage Voltage Unbalance Trip Point (%): Adjustable 2-10% Voltage Unbalance Reset (%): -0.7% unbalance Over/Under Frequency (%): 4%; Reset 3%; 50/60Hz Phase Loss: 25% unbalance Isolation Voltage (V): 2500V RMS input to output Surge Protection: IEEE C62.41-1991 Level B Circuitry: Encapsulated Type of Detection: Voltage detection with delayed trip and automatic reset Life: Mechanical - 1 x 106; Electrical (at 10A) - DPDT - 1 x 303 Termination Type: Screw terminal connection for up to #12 AWG (3.3mm2) wire Mounting Method: Surface mount with one #10 (M5 x 0.7) screw Operating Temperature: -40° to 60°C (-40°F to 140°F) Storage Temperature (F/C): -40° to 85°C (-40°F to 185°F) Humidity: 95% relative non-condensing Dimensions: 3.00 x 2.00 x 1.64 in. (76.7 x 50.8 x 41.7mm)