Engineered and Built in the USA
Current-Monitors
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274-5-240-A
3-Phase Over Current Monitor1 - 5ARead moreThe Model 274 3-Phase Current Monitor is designed to monitor all legs of a 3-phase line, and can also be used to monitor three individual single-phase lines. The output relay will energize on an over-current condition on any one of the 3 monitored lines. Two indicator lamps are provided to show when an over-current condition exists and when the output relay is tripped. An adjustable trip delay of 0.2 to 20 seconds is provided to reduce nuisance tripping. Matching current transformers are available to extend the range of the device to most any range up to 1,000 amps. The Model 274 is offered in either manual or automatic reset models. An external power supply of 24, 120 or 230 VAC powers the device.
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274-5-240-M
3-Phase Over Current Monitor1 - 5ARead moreThe Model 274 3-Phase Current Monitor is designed to monitor all legs of a 3-phase line, and can also be used to monitor three individual single-phase lines. The output relay will energize on an over-current condition on any one of the 3 monitored lines. Two indicator lamps are provided to show when an over-current condition exists and when the output relay is tripped. An adjustable trip delay of 0.2 to 20 seconds is provided to reduce nuisance tripping. Matching current transformers are available to extend the range of the device to most any range up to 1,000 amps.
The Model 274 is offered in either manual or automatic reset models. An external power supply of 24, 120 or 230 VAC powers the device.
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2742-115
3-Phase Over/Under Current Monitor1 - 5ARead moreThe Model 2742 3-Phase Over/Under Current Monitor is designed to monitor the current level of a 3-phase line or to compare the currents of three single-phase lines. The Model 2742 is factory-set as an over-current monitor; that is, if one or more current inputs rises above the trip level, the internal relay will de-energize. Adding a wire between the UNDER CURRENT terminals on the case will cause the Model 2742 to sense a decrease of one or more current inputs. An adjustable trip delay of 0.2 to 20 seconds will prevent nuisance tripping. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2742 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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2742-220
3-Phase Over/Under Current Monitor1 - 5ARead moreThe Model 2742 3-Phase Over/Under Current Monitor is designed to monitor the current level of a 3-phase line or to compare the currents of three single-phase lines. The Model 2742 is factory-set as an over-current monitor; that is, if one or more current inputs rises above the trip level, the internal relay will de-energize. Adding a wire between the UNDER CURRENT terminals on the case will cause the Model 2742 to sense a decrease of one or more current inputs. An adjustable trip delay of 0.2 to 20 seconds will prevent nuisance tripping. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2742 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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2742-24
3-Phase Over/Under Current Monitor1 - 5ARead moreThe Model 2742 3-Phase Over/Under Current Monitor is designed to monitor the current level of a 3-phase line or to compare the currents of three single-phase lines. The Model 2742 is factory-set as an over-current monitor; that is, if one or more current inputs rises above the trip level, the internal relay will de-energize. Adding a wire between the UNDER CURRENT terminals on the case will cause the Model 2742 to sense a decrease of one or more current inputs. An adjustable trip delay of 0.2 to 20 seconds will prevent nuisance tripping. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2742 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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2744-120
3-Phase Over Current Monitor For Motor Jams1 - 5ARead moreThe Model 2744 3-Phase Over Current Monitor is designed to monitor the current level of a three-phase line or to compare the currents of three single-phase lines. If one or more current inputs rises above the trip level after the start delay has expired, the internal relay will de-energize. An adjustable start delay of 5 to 15 seconds will prevent nuisance tripping on start up. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2744 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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2744-220
3-Phase Over Current Monitor For Motor Jams1 - 5ARead moreThe Model 2744 3-Phase Over Current Monitor is designed to monitor the current level of a three-phase line or to compare the currents of three single-phase lines. If one or more current inputs rises above the trip level after the start delay has expired, the internal relay will de-energize. An adjustable start delay of 5 to 15 seconds will prevent nuisance tripping on start up. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2744 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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2744-24
3-Phase Over Current Monitor For Motor Jams1 - 5ARead moreThe Model 2744 3-Phase Over Current Monitor is designed to monitor the current level of a three-phase line or to compare the currents of three single-phase lines. If one or more current inputs rises above the trip level after the start delay has expired, the internal relay will de-energize. An adjustable start delay of 5 to 15 seconds will prevent nuisance tripping on start up. The current trip point is adjustable from 1 to 5 amps, and matching current transformers are available to extend the current range of the monitor. The Model 2744 will automatically reset when the current fault is corrected. An external manual reset can be added by installing a normally closed switch between the terminals marked RESET.
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275-5-120-A
Single Phase Over Current Monitor1 - 5ARead moreThe Model 275 Single Phase Current Monitor is designed for monitoring alternating current in the range of 1-5 amps, at 50 to 400 Hz. The Model 275 provides a contact transfer when the set current level is exceeded for a period longer than the time delay. The OVER-CURRENT indicator illuminates immediately. After the time delay, the TRIPPED indicator lights and the relay contact transfers. This device can directly monitor AC currents in the range of 1 to 5 amps; 50 to 400 Hz. Matching transformers are available to extend the use of this monitor to most any current range. The Model 275 is available with automatic or manual reset. Operating power is supplied by separate 24 or 120 volt power supply.
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275-5-120-M
Single Phase Over Current Monitor1 - 5ARead moreThe Model 275 Single Phase Current Monitor is designed for monitoring alternating current in the range of 1-5 amps, at 50 to 400 Hz. The Model 275 provides a contact transfer when the set current level is exceeded for a period longer than the time delay. The OVER-CURRENT indicator illuminates immediately. After the time delay, the TRIPPED indicator lights and the relay contact transfers. This device can directly monitor AC currents in the range of 1 to 5 amps; 50 to 400 Hz. Matching transformers are available to extend the use of this monitor to most any current range. The Model 275 is available with automatic or manual reset. Operating power is supplied by separate 24 or 120 volt power supply.
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275-5-24-A
Single Phase Over Current Monitor1 - 5ARead moreThe Model 275 Single Phase Current Monitor is designed for monitoring alternating current in the range of 1-5 amps, at 50 to 400 Hz. The Model 275 provides a contact transfer when the set current level is exceeded for a period longer than the time delay. The OVER-CURRENT indicator illuminates immediately. After the time delay, the TRIPPED indicator lights and the relay contact transfers. This device can directly monitor AC currents in the range of 1 to 5 amps; 50 to 400 Hz. Matching transformers are available to extend the use of this monitor to most any current range. The Model 275 is available with automatic or manual reset. Operating power is supplied by separate 24 or 120 volt power supply.
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275-5-24-M
Single Phase Over Current Monitor1 - 5ARead moreThe Model 275 Single Phase Current Monitor is designed for monitoring alternating current in the range of 1-5 amps, at 50 to 400 Hz. The Model 275 provides a contact transfer when the set current level is exceeded for a period longer than the time delay. The OVER-CURRENT indicator illuminates immediately. After the time delay, the TRIPPED indicator lights and the relay contact transfers. This device can directly monitor AC currents in the range of 1 to 5 amps; 50 to 400 Hz. Matching transformers are available to extend the use of this monitor to most any current range. The Model 275 is available with automatic or manual reset. Operating power is supplied by separate 24 or 120 volt power supply.
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279B-120
DC Current Monitor1 - 10A DCRead moreThe Model 279 DC Current Monitor is a single set-point DC current monitor. It can sense either 1-10 Amps DC (24VAC or 120VAC) or 0.1-1 Amps DC (120VAC). The units have an input frequency of 50/60 Hz. The standard version, the 279B, has a screwdriver adjustable trip and hysteresis setting on top of the device. The hysteresis setting adjusts from 0% to 100%, and can be set fully clockwise for manual reset operation. A remote adjust version, the 279C, has a remote trip adjustment and a remote reset button. An LED indicator is provided on both versions to indicate when the relay is energized (current above the trip setting. )
The 279B plugs into a standard 8-pin octal socket; the 279C plugs into a standard 11-pin socket.
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279B-24
DC Current Monitor1 - 10A DCRead moreThe Model 279 DC Current Monitor is a single set-point DC current monitor. It can sense either 1-10 Amps DC (24VAC or 120VAC) or 0.1-1 Amps DC (120VAC). The units have an input frequency of 50/60 Hz. The standard version, the 279B, has a screwdriver adjustable trip and hysteresis setting on top of the device. The hysteresis setting adjusts from 0% to 100%, and can be set fully clockwise for manual reset operation. A remote adjust version, the 279C, has a remote trip adjustment and a remote reset button. An LED indicator is provided on both versions to indicate when the relay is energized (current above the trip setting. )
The 279B plugs into a standard 8-pin octal socket; the 279C plugs into a standard 11-pin socket.
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279BA-120
DC Current Monitor0.1 - 1A DCRead moreThe Model 279 DC Current Monitor is a single set-point DC current monitor. It can sense either 1-10 Amps DC (24VAC or 120VAC) or 0.1-1 Amps DC (120VAC). The units have an input frequency of 50/60 Hz. The standard version, the 279B, has a screwdriver adjustable trip and hysteresis setting on top of the device. The hysteresis setting adjusts from 0% to 100%, and can be set fully clockwise for manual reset operation. A remote adjust version, the 279C, has a remote trip adjustment and a remote reset button. An LED indicator is provided on both versions to indicate when the relay is energized (current above the trip setting. )
The 279B plugs into a standard 8-pin octal socket; the 279C plugs into a standard 11-pin socket.
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279C-120
DC Current Monitor1 - 10A DCRead moreThe Model 279 DC Current Monitor is a single set-point DC current monitor. It can sense either 1-10 Amps DC (24VAC or 120VAC) or 0.1-1 Amps DC (120VAC). The units have an input frequency of 50/60 Hz. The standard version, the 279B, has a screwdriver adjustable trip and hysteresis setting on top of the device. The hysteresis setting adjusts from 0% to 100%, and can be set fully clockwise for manual reset operation. A remote adjust version, the 279C, has a remote trip adjustment and a remote reset button. An LED indicator is provided on both versions to indicate when the relay is energized (current above the trip setting. )
The 279B plugs into a standard 8-pin octal socket; the 279C plugs into a standard 11-pin socket.