Protection Relays Voltage Monitoring Relays HLMU SERIES Description 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. Features & Benefits FEATURES BENEFITS Wiring Diagram Proprietary Constant monitoring to protect against phase loss, microcontroller based phase reversal over, under, and unbalanced voltage circuitry over and under frequency L1, L2, L3 = Line Voltage Input Universal line NO = Normally Open Contact Flexibility to work in 200 to 480VAC applications voltage range NC = Normally Closed Contact DIN rail (35mm) or C = Common, Transfer Contact Installation flexibility surface mounting CAUTION: 2 amp max. fast acting Provides diagnostics of relay, fault and time LED indication fuses are recommended to protect the delay status equipments wiring. They are not required Encapsulated Protects against shock, vibration, and humidity to protect the HLMU. Finger-safe NOTE: Relay contacts are isolated, Meets IEC 61000 safety requirements terminal blocks 277VAC max. 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 Ordering Information measured value of any phase voltage exceeds the acceptable RESTART VOLTAGE TRIP RESTART range limits (lower or upper) the trip delay begins. At the end of MODEL OUTPUT FUNCTION UNBALANCE DELAY DELAY the trip delay the output relay de-energizes. If the phase voltage Lockout, returns to an acceptable value before the trip delay expires, the Adjust. Adjust. Adjust. HLMUDLAAA DPDT min off trip delay is reset and the output remains energized. Under, over, 2 - 10% 1 - 30s 0.6 - 300s time and unbalanced voltages plus over or under frequency must be No restart sensed for the complete trip delay before the unit trips. The unit HLMUDN0405N DPDT Fixed, 4% Fixed, 5s None delay 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. No restart Adjust. Adjust. HLMUDNAAN DPDT None delay 2 - 10% 1 - 30s Reset: Reset is automatic upon correction of the voltage or frequency fault or phase sequence. Staggered Adjust. Adjust. Adjust. HLMUDRAAA DPDT restart 2 - 10% 1 - 30s 0.6 - 300s Restart Delay Options L = Lockout or minimum OFF time. The restart delay begins If you dont find the part you need, call us for a custom product 800-843-8848 when the output trips. The unit cannot be re-energized until the restart delay is complete. This provides a minimum off time or lockout time to allow equipment sensitive to short cycling, 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062716 wwwwww.littelfuse.com/hlmu.littelfuse.com/Protection Relays Voltage Monitoring Relays HLMU SERIES time to reset. If the fault is corrected after the restart delay is Undervoltage & complete, the output energizes immediately. The restart delay Voltage Unbalance also occurs when line voltage is applied/reapplied. Type Voltage detection with delayed trip & automatic reset R = Restart Delay on fault correction. The restart delay begins Overvoltage when line voltage is reapplied or when a voltage fault is Trip Voltage 109 - 113% of the adjusted line voltage corrected. This option is normally selected when staggered Reset Voltage -3% of the trip voltage restarting of multiple motors on a power system is required. Undervoltage N = No Restart Delay. 0.6 second initialization delay on Trip Voltage 88 - 92% of the adjusted line voltage application of line voltage applies. Reset Voltage +3% of the trip voltage Restart Notes: All restart options remain reset when the Voltage Unbalance following conditions are detected: Trip Setpoint Adjustable 2 - 10% or specify fixed unbalance of 2 - 10% in 1% increments 1. Phase loss (phase unbalance greater than 25%) Reset on Balance -0.7% unbalance 2. Average line voltage less than 120VAC Trip Delay 3. Phase reversal Active On Over/undervoltage, voltage unbalance, The restart delay begins when the condition is corrected. over/under frequency LED Operation Range Adjustable from 1 - 30s or specify fixed The LED flashes green during the restart delay, then glows delay 1 - 30s in 1s increments green when the output energizes. It flashes red during the trip Tolerance 15% delay then glows red when the output de-energizes. It flashes Restart Delay red/green if phase reversal is sensed. If a fault is sensed during Range Adjustable from 0.6 - 300s if no restart the restart delay, the LED will glow red during that portion or the delay is selected a 0.6s initialization full restart delay. delay applies Tolerance 15% Accessories Over/Under Frequency 4% Reset 3% 50/60 Hz Phase Sequence A, B, C, L1, L2, L3 LPSM003ZXID (Indicating), Response Time-Phase Reversal & Phase Loss 200 ms LPSM003Z (Non-indicating) Fuse Holders Littelfuse POWR-SAFE Dead Front holders Reset Automatic provide optimum protection to personnel for Output Class CC and Midget-Style fuses. 600 VAC/DC Type Isolated Electromechanical Relay Form DPDT 0KLK002.T Midget Fuse (2 Amp) Rating 10A resistive 240VAC 10 x 38 fast acting, high-interrupting capacity, 8A resistive 277VAC NO-1/4 hp 120VAC current-limiting type fuse. 600 VAC/500 VDC 1/3 hp 240VAC 6 C103PM (AL) DIN Rail Life Mechanical - 1 x 10 3 35 mm aluminum DIN rail available in a 36 in. Electrical (at 10A) - DPDT - 1 x 30 (91.4 cm) length. Protection Phase Reversal/Failure ASME A17.1 Rule 210.6 P1023-20 DIN Rail Adapter Motors and Generators NEMA MG1 14:30, 14:35 Allows module to be mounted on a 35 mm DIN Surge IEEE C62.41-1991 Level B type rail with two 10 screws. Isolation Voltage 2500V RMS input to output Circuitry Encapsulated Mechanical Specifications Mounting Surface mount with one 10 (M5 x 0.7) screw Note: 0.25 in.(6.35 mm) spacing between Line Voltage units or other devices is required Type 3-phase delta or wye with no connection Dimensions H 76.7 mm (3.0) W 50.8 mm (2.0) to neutral D 41.7 mm (1.64) Operating Voltage Termination Screw terminal connection up to 12 AWG 200 - 480VAC Range Voltage Adj. Range Frequency 2 (3.3 mm ) wire 240 200-240VAC 50 or 60Hz Environmental 380 340-420VAC 50Hz Operating/Storage 480 400-480VAC 60Hz Temperature -40 to 60C / -40 to 85C Line Voltage Max. 550VAC Humidity 95% relative, non-condensing AC Line Frequency 50/60 Hz automatically detected Weight 3.9 oz (111 g) Phase Loss 25% unbalance Response Time 200ms 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062716 wwwwww.littelfuse.com/hlmu.littelfuse.com/