Walker Industrial: Home > Manufacturers > P - S > SSAC > Timers & Flashers > Voltage Monitors & Phase Monitors > HLMU Series

HLMU Series
Sort By:
1
HLMUDLAAA - SSAC HLMUDLAAA - SSAC 3 Phase VM 200 480VAC Adjustable Restart Delay On Trip

3 Phase VM 200 480VAC Adjustable Restart Delay On Trip (SSAC HLMUDLAAA)

Usually Ships in 3 to 5 Days
Price: $157.95
HLMUDN0405N - SSAC HLMUDN0405N - SSAC 3 Phase Volt Mon 200 480VAC 4% 5s NO Restart Delay

3 Phase Volt Mon 200 480VAC 4% 5s NO Restart Delay (SSAC HLMUDN0405N)

Usually Ships in 3 to 5 Days
Price: $157.95
HLMUDNAAN - SSAC HLMUDNAAN - SSAC 3 Phase Volt Mon 200 480VAC Adjustable NO Restart Delay

3 Phase Volt Mon 200 480VAC Adjustable NO Restart Delay (SSAC HLMUDNAAN)

Usually Ships in 3 to 5 Days
Price: $157.95
HLMUDRAAA - SSAC HLMUDRAAA - SSAC 3 Phase VM 200 480VAC Adjustable Restart Delay On Restore

3 Phase VM 200 480VAC Adjustable Restart Delay On Restore (SSAC HLMUDRAAA)

Usually Ships in 3 to 5 Days
Price: $157.95
   
 
1
HLMU Series

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.

Operation
Upon application of line voltage, the output is de-energized and the restart delay begins. If all the three-phase voltages are within the acceptable range, the output energizes at the end of the restart delay. The microcontroller circuitry automatically senses the voltage range, and selects the correct operating frequency (50 or 60Hz). The over and under voltage trip points are set at ± 10% of the adjusted line voltage. When the measured value of any phase voltage exceeds the acceptable range limits (lower or upper) the trip delay begins. At the end of the trip delay the output relay de-energizes. If the phase voltage returns to an acceptable value before the trip delay expires, the trip delay is reset and the output remains energized. Under, over, and unbalanced voltages plus over or under frequency must be sensed for the complete trip delay before the unit trips. The unit trips in 200ms when phase loss or reversal are sensed. The unit will not energize if a fault is sensed as the line voltage is applied. Reset: Reset is automatic upon correction of the voltage or frequency fault or phase sequence.

LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during the trip delay then glows red when the output de-energizes. It flashes red/green if phase reversal is sensed. If a fault is sensed during the restart delay, the LED will glow red during that portion or the full restart delay.

Features:

  • Protects against phase loss & reversal; over, under & unbalanced voltages; & over & under frequency
  • Encapsulated circuitry
  • Isolated, 10A, DPDT output contacts
  • LED indicates relay status, faults, & time delays
  • Universal line voltage 200 to 480VAC in one unit
  • Compact design
  • Finger-safe terminal blocks, up to 12 AWG
  • ASME A17.1 rule 210.6
  • NEMA MG1 14:30, 14:35
  • IEEE C62.41-1991 Level B

Auxiliary Products:

  • 3-Phase fuse block/disconnect: P/N: FH3P
  • 2 Amp fuse: P/N: P0600-11
  • DIN rail: P/N: C103PM (Al)
  • DIN rail adaptor: P/N: P1023-20