CLB ATC | Alldatasheet

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3-Phase Current Unbalance & Over Current Monitor WIRING DIMENSIONS (INCHES) OPERATION SPECIFICATIONS OPERATING VOLTAGE 3-Phase, 50/60 Hz, 600 V max CONTROL VOLTAGE 120 VAC, 50/60 Hz OVER CURRENT See Table for Adjustable Ranges UNBALANCE RANGE 5% to 25%, Adjustable INRUSH DELAY 0.1 To 10 SEC, Adjustable; Initiated When Current of Any Phase rises 20% Above the Max. Operating Current OUTPUT SPDT, 10 amp @ 240 VAC Resistive HYSTERESIS 2% of Unbalance Setting RESPONSE TIME Operate 1 Second, Max. Release 100 mSEC INDICATOR LED Glow When All Conditions Are Normal RESET Automatic or Manual TEMPERATURE RATING Operate 32° to 131°F (0° to +55°C) Storage -49° to 185°F (-45° to +85°C) WEIGHT 13 oz. The CLB Series is designed to protect three phase equipment against CURRENT UNBALANCE and OVER CURRENT conditions. The control voltage is continuously applied to supply the sensing circuitry and the internal relay. When the current of any phase approxi - mately 20% above the maximum operating current, the inrush delay begins. This delay disables the over current sensors while high inrush currents are present. Any time the currents are outside the preset limits after completion of the inrush delay, the internal relay will de-energize (Drop-out). An External CT may be used to extend the range of the current monitor. A 2% differential (hysteresis) between Pick-up and Drop-out is incorpo- rated to prevent chattering when operated in the automatic reset mode and the current is at the trip point. The reset mode is selected as follows: AUTOMATIC: Place a jumper between pins ten (10) and eleven (11). MANUAL: Place a normally open switch between pins ten (10) and eleven (11). When there is a loss and reapplication of the control voltage, the external switch must be closed before the circuit will again become operative. MODEL CONTROL OVER NUMBER RANGE CURRENT RANGE CLB-120-ALE-5 120 VAC 1.0 to 5.0 amps, Adjustable CLB-120-ALE-10 120 VAC 2.0 to 10 amps, Adjustable CURRENT MONITORS