SLC ATC | Alldatasheet
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Technical content
PHASE VOLTAGE MONITORS SLC Series The SLC Series is designed to protect 3-phase equipment against Phase UNBALANCE and PHASE LOSS conditions. With normal operating voltages applied to all three phases, the internal relay will remain de-energized (DROPPED-OUT). When a Phase Loss or Phase Unbalance exceeding the pre-selected trip point occurs, the relay will energize (PICK-UP). The SLC series is typi- cally used in conjunction with a SHUNT TRIP BREAKER. 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 SLC series is designed to detect this condition when properly adjusted. OPERATION SPECIFICATIONS OPERATING See Table Below VOLTAGE TRANSIENT 1000 Volts For 8 mSEC PROTECTION RESET Automatic PHASE UNBALANCE 2% to 10%, Adjustable RANGE INDICATORS LED Glows On Fault Condition RESPONSE TIMES Operate 0.08 SEC Release 0.7 SEC 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 12.5 oz. MODEL OPERATING POWER OUTPUT NUMBER VOLTAGE REQUIRED RATING SLC-120-ALE 120 VA 3 VA DPDT, 5 Amps, Max. Resistive;
345 VA, Inductive
SLC-230-ALE 208/240 VAC @ 240 VAC SLC-380-ALE 380 VAC 7 VA DPDT, 3 Amps, Max. Resistive;
360 VA, Inductive
SLC-440-ALE 440/480 VAC @ 600 VAC All voltages referenced on this page are phase-to-phase. Phase Unbalance & Loss Monitor DIMENSIONS (INCHES) WIRING