When installed with a humidifier, set humidistat to the. Enclosed 20 amp spstno relayac fixed current sensor combination, with 24 vacdc coil. It is a current sensing modeule model yyi2 that allows you to set a threshold current value and if that current is exceeded it closes a relay contact on the board. Find an ac current sensor relay or selectable current relay here. Incorporating abbs longterm experience, the cm range provides your electric installation with the highest safety and reliability. Dayton operating instructions models 6c054, 6c055, 6c057. Relay specialties macromatic current sensing relay cah series. Pass the currentcarrying wire to be monitored through the current sensor. Typical hookup diagram of current sensing relay with a humidifier. Aprilaire 600 series installation instructions pdf download.
This relay does not measure voltage, it senses current. Electronic proof of flowcurrent operated switches eliminate the need for multiple pipe or duct. Measuring and monitoring relays single and threephase. Figure 1 ec4 feature overview c led status indicators devicenet port input terminals testreset button node address switches series b and later. Sensing relays voltage sensing relay spdt 15 100 ms to 10 s 1 ondelay 120, 240 vac. A sensor is a unit that can determine a physical phenomenon and compute the latter, in other words, it gives a measurable demonstration of the wonder on a particular scale or range. Cr magnetics cr4395 series current sensing relays provides an effective and highly stable method for monitoring electrical current. The current sensing relay, is used to achieve a fast brake engagement stopping without the use of external control equipment or additional. Potential applications include variable speed drives, overcurrent protection, ground fault detectors, current feedback control systems, robotics, ups and telecommunication power supplies, welding power supplies, battery management systems, and wattmeters. Current sensors digitalinductive open loop current sensors provide digital output that changes from vcc to 0.
Follow all local electrical and safety codes, the national electrical code nec, and osha requirements. Installation instructions for models 50 and 51 current. Battery life indicators and chargers overcurrent protection and supervising circuits current and voltage regulators. Current sensing is a fundamental requirement in a wide range of electronic applications. Description the ec4 current monitoring relay is a multifunction solidstate microprocessorbased electronic current monitoring relay for loads rated from 0.
Enclosed 20 amp spstno relayac adjustable current sensor combination, with 24vacdc coil. Potential applications include robotics, telecommunication, power supplies, ground fault detectors, hvac, and consumer tools. For more than 50 years, atc diversified electronics, a division of marsh bellofram corporation has offered some of the industrys highest reliability ac current monitors, motor and pump protection, isolated switches and alternating relay products. Solid state relays solitron midi current sensing type rjcs.
Current sensing relay model a51 120 volt adams manufacturing. The system implementing highside current sensing puts a shunt resistor between the supply voltage vbus and the load. The cr4395 series, current sensing relay provides an effective and highly stable method for monitoring electrical current. The lsrxlsrxc series are ac current sensors designed to energize the output contact whenever 4. The current sensing relay switches power on or off when overloads, undercurrents and lamp loads occur. Pass the current carrying wire to be monitored through the current sensor. The currentcarrying wire is routed through the opening extending from the top of the case. Voltage monitoring the abb voltage monitoring relays cmess. As a privatelyheld company, we think in the long term and globally.
Switch load capacity 1 a at 30 vac42 vdc maximum isolation voltage 600 vac rms temperature range15 to 60. Conceptually simple in nature, these devices split load current into power and sense components, and thereby allow signal level resistors to be used for sampling. The current carrying wire is routed through the opening extending from the top of the case. Available in splitcore or fixedcore and large aperture enclosures. Highside current sensing is desirable as any downstream failure can be detected and appropriate corrective action can be triggered. Tdr782 series miniature time delay relay that is singlefunction, singlevoltage and socketcompatible. Enclosed 5 amp relay current switch combination, adjustable 0. Current sensing relays and current monitor relays are used in several applications where protection of sensitive or expensive equipment against overcurrent or undercurrent conditions are required. Set the fault trip current setting i at the current level where the relay should energize, indicating a fault condition. Our wide range of current sensing switches guarantees that. Understanding ac and dc current relays can help electrical professionals troubleshoot power quality problems more effectively. Enclosed 20 amp spstno relay ac fixed current sensor combination, with 24 vacdc coil. When a fault is sensed throughout the trip delay, the output relay is energized.
The relay is mounted directly on the conduit box, and is powered from the motors terminal block. In this case, the relay is sensing z a between the relay and the fault. Atc diversified electronics marsh bellofram corporation. Set the selector switch to either the overcurrent sensing setting or undercurrent sensing setting. Humidifier model 50 current sensing relay metal bracket common lead furnace blower motor common 24 120 vac vac transformer r c a b odt cfwg h furnace blower motor model 50 humidifier. These current sensors are combined with relays, because sometimes you just need both. Typical applications that benefit from current sensing include.
Input voltage must be supplied at all times for proper operation. Current sensors product range guide honeywell sensing. Enclosed 5 amp relaycurrent switch combination, adjustable 0. They be used in several applications where protection of sensitive or expensive equipment against over or under current conditions is required, such as detecting sensing conveyor jamup conditions, machine tool wear, no load conditions or monitoring status of heater or lamp. The csr1 current sensing relay is designed to operate in fuel pumps with sealed switch motors, which do not contain an extra switch contact for use with a console or card system.
The csr1 is designed to be wired in series with the pump motor. This catalog provides features and ordering information for eaton s cooper power series current sensing bayonet fuse link that is used in bayonet fuse assemblies to protect distribution apparatus from damaging currents and distribution systems from fa iled apparatus. As1 norftgo series current sensing switches provide an electromechanical relay contact. Current sensor relays from grainger protect heavy machinery from sudden current changes. The angle by which current lags quadrature voltage is a factor of both source impedance as well as forwardlooking line impedance. This circuit provides reliable control of a relay by using an electronic circuit. Cah seriescan detect either an overcurrent or undercurrent fault selectable. The output of this specialized switch allows the sensor to control. The model a50 current sensing relay measures electrical current rather than voltage. Current sensing relay description and installation instructions the model a50 24 volt current sensing relay is designed for interfacing humidifiers with all types of forced air furnaces and air conditioning equipment. We are trying to use it on a stepper motor driver that runs a motor that opens or closes a needle valve.
Aprilaire 600 series installation instructions pdf. This product must be installed in compliance with all local, state and federal codes. Csr1 current sensing relay integrated control systems. Current switching mode under current sensing overunder current sensing overunder current sensing sensor supply voltage induced from power conductor cable. Humidifier model 50 current sensing relay metal bracket common lead furnace blower motor common 24 120 vac vac transformer r c a b odt cfwg h furnace blower motor model 50 humidifier automatic. When current reaches the level set by the trip point adjustment, the relay trips and starts the adjustable timer.
Adjustable setpoint for current sensor status 5year limited warranty the hawkeye relay combination series is the ideal solution for the automation installer. Cr4395 series, current sensing relay provides an effec. Current sensing switches current sensing relays nk. The moving contacts will assume a position corresponding to the current applied to the relay and will stay in that position until current changes. External current transformers available the cr4395 series, current sensing relay provides an effective and highly stable method for monitoring electrical current. When current reaches the level set by the trip point. The cxh series is an ac current sensing relay that is available in three versions. Fundamentals of current sensor sensing concepts and. Enclosed 20 amp spstno relay ac adjustable current sensor combination, with 24vacdc coil. Magnetically isolated solidstate switch, 150 ma max. This output allows the sensor to control much more current than other as1 models.
Current sensing module with relay not reading correct current. It is less expensive than using traditional flow switches, pressure switches or other types of relays. An105 current sense circuit collection making sense of. However, when quadrature voltage is used, then v pol is somewhat independent of the fault current, especially for a phase to ground fault.
Sensing variable current flow is a major requirement in frequent electronics systems and the strategies to do so are as an assortment of the applications themselves. Highside current sensing implementation highside current sensing is typically selected in applications where ground disturbance cannot be tolerated, and short circuit detection is required, such as motor monitoring and control, overcurrent protection. An105 current sense circuit collection making sense of current. Current sensing switches as1 norftgo series current sensing switches are a specialized current sensing switch providing an electromechanical relay contact. These units combine a current switch and relay into a single package, reducing the space required for total control of. Current sensors product range guide honeywell sensing and. The dct series of dc current sensors is a family of highperformance transducers offering outstanding features, flexibility, and durability at an incredible price. Rated operational operational voltage voltage voltage output current voltage type. This item senses current rather than measuring voltage, making it more reliable. The lead wire bracket is protected by a soft sponge insert, in order to prevent damage to the. Current sensing power mosfets sensefet product current sensing power mosfets provide a highly effective way of measuring load current in power conditioning circuits. The hawkeye relay combination seriesis the ideal solution for the automation installer.
Dc switch with solidstate or mechanical relay output. This contact can control loads up to 5 a, ac or dc. Applications of current and voltage monitoring relays in singlephase mains current window monitoring i min, i max the window monitoring relay cmsfs. Current sensing relays current monitor relays overcurrent. The asd series current relays are externally pow ered ac current sensors which utilize a revolu tionary method to set the point where the primary current. A wide range of products, highest quality standards the latest technologies in mechanics and electronics, great depth. Schneider electric legacy time delay and sensor relays.
Available fault current a table 8 short circuit ratings per ul6094741 and csa 22. En6094741 with 100c, iec, contactors protected by bul. Overcurrent and undercurrent sensing gono go sensing toroidal sensing provides complete isolation between sensed current and control circuit easy setting of trip point with unique combination of led indicator, current adjustment and percentage potentiometers can switch up to 20 amps 1. The current sensing relay case is constructed from highimpact plastic. Apr 24, 2020 it is a current sensing modeule model yyi2 that allows you to set a threshold current value and if that current is exceeded it closes a relay contact on the board. Csd series current devices catalog page johnson controls. Current sensors line guide honeywell sensing and internet. Highside current sensing can be seen as a small sense. Emc compliant high side current sensing with overvoltage.
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