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Marsh Bellofram Diversified Electronics Division SLC Series Phase Unbalance & Loss Monitor
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Marsh Bellofram Diversified Electronics Division SLC Series Phase Unbalance & Loss Monitor
1 /1Page
Catalog excerpts
SLC Series Diversified Electronics atcdiversified.com 800.727.5646 222 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 typically used in conjunction with a shunt trip breaker. Both Delta and Wye systems may be monitored. In Wye systems, connections 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 voltage. The SLC series is designed to detect this condition when properly adjusted. P h a s e U n b a l anc e & L os s Moni to r \\\OPERATION \\\SPECIFICATIONS OPERATING VOLTAGE See Table Below TRANSIENT PROTECTION 1000 Volts For 8 mSEC RESET Automatic PHASE UNBALANCE RANGE 2% to 10%, Adjustable INDICATORS LED Glows On Fault Condition RESPONSE TIMES Operate 0.08 SEC Release 0.7 SEC TEMPERATURE RATING Operate 32° to +131°F (0° to +55°C) Storage -49° to 185°F (-45° to +85°C) U.S. PATENT NUMBER 4,331,995 WEIGHT 12.5 oz MODEL NUMBER OPERATING VOLTAGE POWER REQUIRED OUTPUT RATING SLC-120-ALE 120 VAC 3 VA Max. DPDT, 5 Amps, Resistive; 345 VA, Inductive @ SLC-230-ALE 208/240 VAC 240 VAC SLC-380-ALE 380 VAC 7 VA Max. DPDT, 3 Amps, Resistive; 360 VA, Inductive @ SLC-440-ALE 440/480 VAC 600 VAC All voltages referenced on this page are phase-to-phase. \\\DIMENSIONS (INCHES) \\\WIRING
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