3 PHASE VOLTAGE MONITOR

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. Input Voltage (V) 200 - 240 Vac; 340 - 420 Vac; 400 - 480 Vac Input Voltage Maximum (V) 550 Input Type 3-phase delta or WYE with no connection to neutral Input AC Line Frequency (Hz) 50 / 60 automatically detected; 240 V ac: 50 / 60; 380 V ac: 50; 480 V ac: 60 Input Phase Sequence A; B; C; L1; L2; L3 Output Type Isolated electromechanical relay Output Form DPDT Output Load Rating (VA) 10 A resistive @ 240 Vac; 8 A resistive @ 277 Vac; NO-1/4 hp @ 120 Vac; 1/3 hp @ 240 Vac Reset Time (ms) Automatic Response Time (ms) Phase loss: =200 ms; Phase reversal: =200 ms Restart Delay Range 0.6 - 300 s adjustable Restart Delay Tolerance (%) ±15% Trip Delay Type Active On: Over/undervoltage; voltage unbalance; over/under frequency Trip Delay Range 1-30 s adjustable 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 / 60 Hz Phase Loss =25% Surge Protection IEEE C62.41-1991 Level B Type of Detection Voltage detection with delayed trip and automatic reset Termination Type Screw terminal connection for up to #12 AWG (3.3 mm²) wire Mounting Method Surface mount with one #10 (M5 x 0.7) screw Operating Temperature -40° to 60°C (-40° to 140°F) Storage Temperature (F/C) -40° to 85°C (-40° to 185°F) Humidity 95% non-condensing Dimensions 3 H x 2 W x 1.64 D in. (76.7 x 50.8 x 41.7 mm) Weight (lbs/g) 0 Kg Check Stock Yes