• 171-1A-Under-Current-Monitor

    171

    Under Current Monitor
    0.1-1A

    The Model 171 is an AC current monitor for detecting undercurrent conditions. The monitor contains a proprietary microcontroller-based circuit monitoring current passed through an internal shunt resistor and driving an electromechanical SPDT relay. Two status lights are provided to indicate relay status, fault condition, and timing. An adjustable trip delay is provided to prevent nuisance tripping and an adjustable restart delay has been provided for applications requiring a delay to start an additional load.

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  • 173-Over-Under-Current-Monitor

    173-25

    Over/Under Current Monitor
    5-25A

    The Model 173 AC Current Monitor is a single set-point AC current monitor. It can be used to detect either over current or under current, depending on whether the set-point is set above or below the input current. An LED indicator illuminates whenever the current is above the set-point. Two versions, either of which can be connected to 120 or 240 VAC, are available. One for current ranges up to 5 amps, the other for applications from 5 to 25 amps. For currents above 25 amps, matching CTs are available. The Model 173 is not frequency sensitive and can be used on AC currents from 40 to 400 Hz. The compact housing is surface mounted with 1/4 in. quick connect terminals provided for input and output connections.

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  • 173-Over-Under-Current-Monitor

    173-5

    Over/Under Current Monitor
    1 - 5A

    The Model 173 AC Current Monitor is a single set-point AC current monitor. It can be used to detect either over current or under current, depending on whether the set-point is set above or below the input current. An LED indicator illuminates whenever the current is above the set-point. Two versions, either of which can be connected to 120 or 240 VAC, are available. One for current ranges up to 5 amps, the other for applications from 5 to 25 amps. For currents above 25 amps, matching CTs are available. The Model 173 is not frequency sensitive and can be used on AC currents from 40 to 400 Hz. The compact housing is surface mounted with 1/4 in. quick connect terminals provided for input and output connections.

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  • 1732-Over-Under-Current-Monitor

    1732

    Over/Under Current Monitor
    25 -150A

    The Model 1732 AC Current Monitor is a single set-point current monitor. It can be used to detect either over current or under current, depending on whether the trip point is set above or below the input current. Dual LED indicators on the front or top of the unit give a clear visual reference for a fault condition. The Model 1732 generates its operating voltage from the monitored current line, so no external power supply is required. A current greater than 25 amps is needed to energize the internal relay. Momentary current above 150 amps will not damage the unit, however, the maximum current set-point is 150 amps. The Model 1732 is not frequency sensitive, and can be used on AC currents from 50 to 400 Hz.

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  • 27-TRUE-RMS-Over-&-Under-Current-Monitor

    27

    TRUE RMS Over & Under Current Monitor
    0 - 5A

    Model 27 True RMS Current Monitor has a display that shows the current with an accuracy of +/- 0.5%. The display is updated every second and re-initialized every 30 seconds. Model 27 has a rotary encoder with switch on the unit. By pressing the encoder switch for more than 5 seconds, the unit will enter the setup mode. This unit has a user selectable relay option for High-Low or DPDT. It can also be user-selected to energize on fault or de-energize on fault. The user can select automatic or manual restart on the Model 27. The SG version of the Model 27 has silver with gold flash contacts for low current applications. Model 27 True RMS Current Monitor can be either calibrated using a True RMS Multimeter or can be restored to factory defaults in the field.

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  • 272-3-Phase-Current-Unbalance-Detector

    272-120

    3-Phase Current Unbalance Detector
    1 - 5A

    The Model 272 3-Phase Current Unbalance Detector monitors 3-phase lines to detect an unbalanced current. It can also monitor three separate single phase lines for equal current levels. The percentage of unbalance is adjusted from 2% to 25% by adjusting a front panel control. An unbalance greater than this setting energizes the relay. An adjustable trip delay of 0.5 to 10 seconds is also provided. For optimum performance, operating currents should be kept in the 1 to 5 amps range. However, zero current on each phase is considered to be a balanced condition. Continuous currents, up to 10 amps per phase, will not damage the unit, nor will current surges up to 40 amps for 2 seconds. The contacts are automatically reset when the unbalanced condition is corrected.

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  • 272-3-Phase-Current-Unbalance-Detector

    272-24

    3-Phase Current Unbalance Detector
    1 - 5A

    The Model 272 3-Phase Current Unbalance Detector monitors 3-phase lines to detect an unbalanced current. It can also monitor three separate single phase lines for equal current levels. The percentage of unbalance is adjusted from 2% to 25% by adjusting a front panel control. An unbalance greater than this setting energizes the relay. An adjustable trip delay of 0.5 to 10 seconds is also provided. For optimum performance, operating currents should be kept in the 1 to 5 amps range. However, zero current on each phase is considered to be a balanced condition. Continuous currents, up to 10 amps per phase, will not damage the unit, nor will current surges up to 40 amps for 2 seconds. The contacts are automatically reset when the unbalanced condition is corrected.

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  • 273-Single-Phase-Over-Under-Current-Monitor

    273-10-120

    Single Phase Over/Under Current Monitor
    2 to 10A

    The Model 273 Single Phase Current Monitor is a single set-point sensor. It can be used as either an over current or under current sensor, depending on the contacts used. This device can directly monitor AC currents in the range of 0.5 to 5 amps: or 2 to 10 amps, 50 to 400 Hz. Matching transformers are available to extend the use of the monitor to most any range. The current being monitored can be of any voltage, up to the rating of the socket. An LED indicator is provided to show when the relay is energized. The Model 273 is available for either 24 VAC or 120 VAC supply voltages.

    Model 273-5 is UL Recognized and CSA Certified. All versions use a standard 8-pin socket.

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  • 273-Single-Phase-Over-Under-Current-Monitor

    273-10-24

    Single Phase Over/Under Current Monitor
    2 to 10A

    The Model 273 Single Phase Current Monitor is a single set-point sensor. It can be used as either an over current or under current sensor, depending on the contacts used. This device can directly monitor AC currents in the range of 0.5 to 5 amps: or 2 to 10 amps, 50 to 400 Hz. Matching transformers are available to extend the use of the monitor to most any range. The current being monitored can be of any voltage, up to the rating of the socket. An LED indicator is provided to show when the relay is energized. The Model 273 is available for either 24 VAC or 120 VAC supply voltages.

    Model 273-5 is UL Recognized and CSA Certified. All versions use a standard 8-pin socket.

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  • 273-Single-Phase-Over-Under-Current-Monitor

    273-5-120

    Single Phase Over/Under Current Monitor
    0.5 - 5A

    The Model 273 Single Phase Current Monitor is a single set-point sensor. It can be used as either an over current or under current sensor, depending on the contacts used. This device can directly monitor AC currents in the range of 0.5 to 5 amps: or 2 to 10 amps, 50 to 400 Hz. Matching transformers are available to extend the use of the monitor to most any range. The current being monitored can be of any voltage, up to the rating of the socket. An LED indicator is provided to show when the relay is energized. The Model 273 is available for either 24 VAC or 120 VAC supply voltages.

    Model 273-5 is UL Recognized and CSA Certified. All versions use a standard 8-pin socket.

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  • 273-Single-Phase-Over-Under-Current-Monitor

    273-5-24

    Single Phase Over/Under Current Monitor
    0.5 - 5A

    The Model 273 Single Phase Current Monitor is a single set-point sensor. It can be used as either an over current or under current sensor, depending on the contacts used. This device can directly monitor AC currents in the range of 0.5 to 5 amps: or 2 to 10 amps, 50 to 400 Hz. Matching transformers are available to extend the use of the monitor to most any range. The current being monitored can be of any voltage, up to the rating of the socket. An LED indicator is provided to show when the relay is energized. The Model 273 is available for either 24 VAC or 120 VAC supply voltages.

    Model 273-5 is UL Recognized and CSA Certified. All versions use a standard 8-pin socket.

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  • 2730-Over-and-Under-Current-Monitor

    2730-120

    Over and Under Current Monitor
    1 - 5A

    The Model 2730 Over/Under Current Monitor is designed to monitor a single AC current input for high and low current conditions. The solid-state circuitry drives two internal electromechanical relays. When operating power is applied, the unit will not respond to the current input for the duration of the ON delay. Normal operating current will leave the relays de-energized. A current drop below the LOW TRIP setting will energize the low current relay; a current rise above the HIGH TRIP setting will energize the high current relay. The relays may be interconnected to provide current band monitoring. Indicator LEDs show when a trip condition is sensed, and when the appropriate relay is energized. The trip and reset response times for the Model 2730 are set at one (1) second. Special adjustable versions are available on request. Current transformers may be used to extend the operating range of this unit.

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