SLD ATC | Alldatasheet
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Diversified Electronics 800.727.5646 atcdiversified.com PHASE VOLTAGE MONITORS SLD Series The SLD Series is designed to protect 3-phase equipment against PHASE UNBALANCE, PHASE LOSS, UNDER VOLTAGE and PHASE REVERSAL conditions. With normal operating voltage present on all three phases in the proper phase sequence, the internal relay will energize (PICK-UP). When an incorrect phase sequence or phase loss occurs or the three-phase line voltages fall outside the preset unbalance or under voltage settings, the internal relay will de-energize (DROP-OUT). When all conditions return to normal, the relay will reset. The Adjustable Release Delay is provided to ignore momentary voltage fluctuations that cause nuisance tripping. Both Delta and Wye systems may be monitored. In Wye Systems, con- nections to neutral are not required. NOTE: When a phase is lost while the motor is running, a condition known as regeneration occurs where a voltage is induced into the open phase nearly equal in magnitude to the normal phase-to-phase volt- age. The SLD series is designed to detect this condition when properly adjusted. The SLD Series is UL Listed under UL File Number E55826. OPERATION SPECIFICATIONS OPERATING See Table Below VOLTAGE TRANSIENT 1000 Volts For 8 mSEC PROTECTION RESET Automatic PHASE SEQUENCE ABC (will not operate CBA) PHASE UNBALANCE 2% to 10%, Adjustable RANGE INDICATORS LED Glows When All Conditions Are Normal RESPONSE TIMES Operate 30 mSEC Release 0.1 to 20 SEC, Adjustable (on Under Voltage only); 100 mSEC on Phase Reversal and Unbalance TEMPERATURE Operate 32° to +131°F (0° to +55°C) RATING Storage -49° to 185°F (-45° to +85°C) U.S. PATENT 4,331,995 NUMBER WEIGHT 13.5 oz. MODEL OPERATING UNDER VOLTAGE POWER HYSTERESIS OUTPUT RATING ENCLOSURE NUMBER VOLTAGE DROPOUT RANGE REQUIRED SLD-120-ASA 120 VAC 95-115 Adj. 2.5 VAC SPDT, 10 Amp, Resistive @ 240 VAC A SLD-230-ASA 208/240 VAC 185-230 Adj. 3 VA Max. 5.0 VAC 1/2 HP @ 240 VAC SLD-380-ASA 380 VAC 315-390 Adj. 10 VAC SLD-440-ASA 440/480 VAC 370-460 Adj. SLD-120-ALE 120 VAC 95-115 Adj. 5 VAC DPDT, 5 Amps, Resistive; 345 VA, E SLD-230-ALE 208/240 VAC 185-230 Adj. Inductive @ 240 VAC SLD-380-ALE 380 VAC 315-390 Adj. 7 VA Max 10 VAC DPDT, 3 Amps, Resistive; 360 VA, SLD-440-ALE 440/480 VAC 370-460 Adj. Inductive @ 600 VAC All voltage referenced are phase-to-phase. Phase & Under Voltage Monitor DIMENSIONS (INCHES) WIRING STYLE "E" STYLE "E" STYLE "A" STYLE "A" IND. CONT . EQ. 496Y