Electronic Current-Transducer Type STWA1AH
The STWA1AH is a current-transducer for AC currents 0...15 A. With the STWA1AH the value of a current can be evaluated very economically and space-saving.
The output-signal 0...20 mA can be evaluated or displayed with components with analog inputs, e.g. PLCs or ZIEHL TR 210, STW 1000 V2 or MINIPAN®.
For currents 0...20 A and 0....100 A, please choose our Electronic Current-Transducer Type STWA2AH
- current-proportional analog output DC 0...20 mA = AC 0...15 A (insulated)
- electrical connection via screw less pluggable terminals
- no supply voltage required
- DIN-rail-mount or with screws
- plug-in current transformer (Ø 11 mm)
- max. overload 100 A continuously, 300 A max. 10 s
| Product group: | Mains Monitoring |
|---|---|
| Input/ Measured parameter: | Current measuring |
| Outputs: | Analog output 0-20 mA, 0-10 V |
| Design: | Mount in switchgear cabinet, Wall-mount housing |
| Approval: | EU / UKCA-Declaration of Conformity |
| Extras: | Current transformers |
| Applications: | Control for trace heating |
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Accessories
Temperature-Relay TR210
The TR210 is used asGeneral temperature protection of machines and installationsTemperature control unit, also for cooling applicationsDifference temperature controller unit for air-conditioning technologyOverview of functions2 Sensor inputsPt 100, Pt 1000, KTY 83 or KTY 84 in 2- or 3-wire configurationThermocouples Type B, E, J, K, L, N, R, S, TInput signal DC 0-10 V; DC 0/4-20 mA0.1 °C resolution between –199.9...999.9 °C2 Relay outputs (each 1 change-over contact)1 Analogue output DC 0-10 V or 0/4-20 mA for parameterizing (not potentially separated from the inputs)Universal power supply AC/DC 24-240 VSeveral selectable programsStorage and indication of the measured MIN- und MAX-valuespluggable terminalsAccessory: Front mounting kit type ER4Alternative: Temperature relay Type TR640IP
DC-Limit Value Switch Type STW1000V2
ZIEHL current-relays STW1000V2 monitor standardsignals from measuring transducers if a limit is exceeded. For monitoring of more than 1 signal, multiple relays can be connected in series (current) or in parallel (voltage). Measuring inputs for 0/4-20 mA and 0-10 V, adjustable hysteresis and switching delay and the choice between operating- and closed-current mode of the relay make it a very universal limit switch.ApplicationsMonitoring of different values in combination with measuring transducers, e.g. in machines and controls.Measuring inputs 0-20 mA / 0-10 V, switchable to 4-20 mA / 2-10 VLimit adjustable 0-100 %Hysteresis adjustable 5-30 %Start-up delay adjustable 0,1 ... 10 sSwitching delay adjustable 0,1 ... 10 sOutput-relay 1 changeovercontact (co)Operating- or closed-circuitmode for relay selectable with bridgeLEDs for display state of operationUniversal supply-voltage AC/DC 24-240 VHousing for mounting in switchgear cabinets or fuseboxes, 35 mm wide
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Universal-Instrument Type MINIPAN 352P
The Universal-Instrument MINIPAN 352P is a versatile
instrument for industrial applications. It is particularly characterized by its
limit value and control functions, which are realized by two programmable
switching points. These allow it to be used as a limit relay or as a 2- or
3-point controller. The innovative EasyLimit function considerably
simplifies the setting of limit values and at the same time protects other
parameters from unintentional changes.
The device has a wide range of measurement inputs, including
AC measurements with true RMS measurement, which makes it particularly
suitable for precise AC measurements. Both AC and DC current and voltage,
resistances and temperatures can be measured with various sensors. The 4-digit
LED display with 14 mm high digits is freely scalable from -1999 to +9999,
allowing the measured values to be displayed individually.
In addition, the MINIPAN 352P offers an optional analog
output (4-20 mA), which makes it suitable for use as a measuring transducer.
The universal supply voltage of AC/DC 24-240 V increases flexibility in use.
With its compact design and simple programming via three buttons, the device is
ideal for a wide range of measurement tasks in industry.
Application: MINIPAN352P are often installed in heating,
ventilation and air conditioning systems, where they provide a simple and
effective way of keeping temperatures within a certain range.
Level Monitor Type NS43V
The NS level monitor is an electronic device for monitoring levels of conductive liquids. The monitoring of the levels is effected vis electrodes, which are dipped or set free according to liquid level. All conductive liquids can be monitored, preferrably, however, water, also of different degree of hardness.To adapt the relay to the conductivity of the liquid and to the capacitance of (long) cables, the switching limit can be adjusted app. 5 kO ... 250 kO. Thus it also is possible to tell between the liquid and foam over the liquid.FunctionThe NS unit protects aggregates and plants against dry running, overflow, leakage damages and unnecessary loss of liquids. It controls and monitors levels of liquids in waste-water, pools, fish farms and whereever a certain level should be maintained or dosed.Depending on the application and the set program, it controls the level between 2 or 3 electrodes by means of opening or closing dose or drain of a container. The top and the lowest electrode protect from overflow or running dry.An electrolytic corrosion of the electrodes as well as detonating gas production is excluded due to a AC current measuring path.The universal supply voltage AC/DC 24-240 V allows to connect the relay to any common mains.The isolation between electronics (= electrodes) and supply voltage avoids malfunctions caused by potential spreading, also at DC-supplys.Monitoring of up to 4 levels4 relays with change-over contacts (co)Sensitivity adjustable 5...250 kOSwitching delay of relays adjustable 0...10 sSwitching-delay of alarms (on/off) adjustable 0...10 sBasic programs (selectable with DIP-switches) for various applicationsUniversal supply voltage AC/DC 24-240 VTerminals pluggableHousing for DIN-rail or wall-mount,mounting height 55 mm, 70 m m wideAccessory: Installation Frame ER6 for panel mount
Pt 100-Temperature Relay Type TR400
The Pt 100 thermostat TR400 is a temperature controller and monitors up to 4 Pt 100 sensors at the same time. 4 switching points and 4 relays permit almost any combination of switching action. It also can select the highest temperature of a group of2, 3 or 4 sensors. The temperatures of two sensors or groups of sensors can be issued to 2 analog outputs i.e. for remote displays or further evaluation. Programming is very variable and simple.Due to the fact that 4 type Pt 100 sensors can be connected, the unit is especially suitable for temperature monitoring wherever up to 4 different measuring points must be monitored simultaneously:motors and generators with simultaneous monitoring of bearings and coolant.transformers with additional monitoring of the core temperature also.power machines and plantsOverview of functionsMeasuring and monitoring range -199 ... +800 °C4 sensor inputs with 2- or 3-wire connection4 relay outputs K1 to K4 with change-over contactSensor Error Relay K7 monitors sensor break or sensor short circuit as well as aninterruption of the power-supply.2 analog outputs, 0/4...20 mA und 0/2...10 V, with individual scaling.Universal power supply AC/DC 24-240 VTerminal for USB-Stick for up- and downloads of sets of parameters and for firmware- updatesAccessory: Installation frame ER8 for panel mountAlternative: Temperature Relay Type TR660IP
Control for suction plants Type STW84V
The basic function of the device is to detect whether a current is flowing in the supply line of one of several woodworking machines. If a current flow is detected, the device opens a valve on the machine's suction channel. At the same time, the extraction system is switched on. When a machine is switched off, the device closes the associated valve with a delay. If the last machine is switched off, the extraction system also stops after a delay.The current relay STW84V monitors up to 8 alternating current sets on current flow yes/no. The inputs can analyse signals of current transformers type STWA1(H) or of potential-free contacts.For controlling of great dedusting plants several relays can be combined.ApplicationsControlling of dedusting plants in the timber and plastic processing industry according to the technical rules for dangerous materials TRGS 553. The central suction is switched on, as soon as any machine is put into operation. According slide-valves in the suction ducts of the individual machines are opened. In addition, cleaning of a filter (vibration) and a cellular wheel/discharge can be controlled, an external cleaning (with pressurized air) can be started or exceeding of max. volume flow can be reported. The analog output 0...10 V can control a frequency-converter at the motor of the ventilator and thus optimize performance and save energy.Monitoring of 8 machines (STWA1(H) or contact)input for "open all slide-valves"8 relays (with change-over contacts) for slide-valves1 relay for control ventilator1 relay for filter-cleaning1 relay for control of cellular wheel/discharge or report exceeding max. volume-flowanalog output for control of frequency-converter and combination of more STW84Vterminals pluggableuniversal supply voltage AC/DC 24-270 V
Temperature-Relay TR210
The TR210 is used asGeneral temperature protection of machines and installationsTemperature control unit, also for cooling applicationsDifference temperature controller unit for air-conditioning technologyOverview of functions2 Sensor inputsPt 100, Pt 1000, KTY 83 or KTY 84 in 2- or 3-wire configurationThermocouples Type B, E, J, K, L, N, R, S, TInput signal DC 0-10 V; DC 0/4-20 mA0.1 °C resolution between –199.9...999.9 °C2 Relay outputs (each 1 change-over contact)1 Analogue output DC 0-10 V or 0/4-20 mA for parameterizing (not potentially separated from the inputs)Universal power supply AC/DC 24-240 VSeveral selectable programsStorage and indication of the measured MIN- und MAX-valuespluggable terminalsAccessory: Front mounting kit type ER4Alternative: Temperature relay Type TR640IP
Niveaurelais Type NS20
Level-Relays NS 20 for conductive liquids can be used as monitors for 1 Level and for controlling a level between 2 electrodes.3 elektrodes for MIN/MAXcontrol2 elektrodes (E2 open) as level monitorSensitivity adjustable 5 kO…250 kOLED for state of relayFunction of relay reversible (picks up or releases at top electrode)Switching-delay adjustable 0,1…10 sHousing 35 mm wide, mounting height 55 mmUniversal supply-voltage AC/DC 24-240 VApplication level monitorProtection from running dry or overflow, monitoring of pumps for leaks, detection of leaks.Application Min/MaxControlling a level between minimum (elektrode E2) and maximum (E3). As long as E3 is dry, a magnetic valve is opened (or a pump is running) and liquid is influenting. As soon as maximum (E3) is reached, the NS 20 closes the valve. When the level falls below E2, the cycle starts new. In reverse also discharging of a container can be controlled.Overview of functions example filling with 2 electrodesThe detection of the level is made with a DC-free measuring of resistance between all electrodes The common electrode in E 1. A magnetic valve that is switched with relay-contacts 15-18 opens and lets liquid in until the upper electrode E3 is in contact with the liquid. Then the relay releases (15-18 open) and the valve closes. The relay remains released as long as electrode E 2 is in contact with the liquid. When the level falls below E2, the relay picks up (LED Relay on, 15-18 close) and the procedure starts new with opening the valve. Thus thelevel of the liquid is kept between E 1 and E 2.For monitoring one level only or in applications to protect from running dry or overflow or leak detection, only electrodes E1 and E3 are connected.
Pt100-Temperature-Sensors Type TF101ZG2
Temperature sensors of the TF101 series are resistance thermometers (RTD sensors) and contain a platinum measuring resistor in accordance with EN 60751 / IEC 60751. It has a high long-term stability and the measurement is accurate over a long period of time with temperature sensors of this type series. The close tolerance of the measuring resistors makes it possible to replace the sensors without having to recalibrate the connected measuring or switching devices while retaining the measuring cable length.Platinum resistance temperature sensor built into steel tube V4A, 1/2 inch, suitable for installation in pipes. Thermal response time T0,9 in the air 255 s, in water 45 s. Connection flat plug 2,8 mm, Gasket IP55, clamping diameter 8-12 mm, cable connecthead max. 100 °CSuitable for transmission in 2- or 3-wire technique.Weight 120 g(Dimensions see Dimension illustrations)
Level Monitors Type NS43
The level monitor NS43 regulates the level of liquid in a container between 2 electrodes. In the normal operation the level of the liquid is situated between the electrodes E2 and E3. The relay K2 tightens, if the level E3 is achieved and drops, if E2 is fallen below. Over the output contacts (1 change-over switch) a pump or a valve can be controlled depending upon case of application and so the level be regulated.If the level continues to rise in an incident and if the electrode achieves E4, then a message takes place via relay K3 (drops). In the reverse case (level under E1) the relay K1 drops and protects e.g. a pump against running dry. LEDS signal, which electrodes are moistened.Level monitoring of leading liquidsMIN/MAX level regulationprotection from overflowprotection from running drysensitivity adjustable 5...250 kOLED for level display / alarmApplicationIn the galvanotechnics and everywhere, where the level of a leading liquid must be held on a certain level and at the same time a monitoring on overflow and/or no-load operation is necessary.
Electronic Current-Transformer Type STWA1SEH
The STWA1SEH is used where current flow has to be detected, e.g. to report exceeding of a limit, to switch off a machine or just report the current flow. The STWA1SEH has an integrated electronics with transistor-output. The limit is adjustable 2 - 10 A with a potentiometer. A LED displays the state.adjustable switching point 2-10 Abuilt-in LED displays state of the outputisolated transistor-output max. DC 40 V / 40 mAoutput van be directly connected to a digital input of a PLCintegrated diode for reverse voltage protectionelectrival connection via screwless pluggable terminals2-wire, no supply voltage requiredDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)max. overload 100 A continuously, 300 A max. 10 s.
Pt 100-Temperature relays Type TR1200IP
Temperature-relays TR1200IP measure the temperature of up to 12 sensors within 199...+850 °C and provide the data at an ethernet interface for external evaluation. With its universal power-supply AC/DC 24-240 V it can be connected to all common supply-voltages. Actual measured values and stored min- and max-values can be displayed in a normal browser.At the ethernet interface the following protocols are available:Modbus TCPZIEHL RTDIEC61850 (GOOSE) ATTENTION: for part-no. T224078 onlyThe TR1200IP itself does not monitor temperatures for limits. For direct monitoring of temperatures our devices with alarms and output relays are recommended.It is used where temperatures of many sensors Pt100 shall be measured and transmitted via ethernet.Applications are e.g. monitoring of:Motors and generators (windings, bearings, coolant, ambient temperature)Transformers (windings, core, ambient temperature)Maschines, plants and equipmentSensors and displays:12 inputs for sensors Pt 100 (RTD)Connection in 2- or 3-wireunneeded inputs can be switched offMonitoring of sensors for short-circuit an interrupt3-digit-display for temperatureLEDs for assigning the measured value, error, state of relay and interfaceInterface:10 MBit/s Ethernetsupports IEC 61850 GOOSEProtocol ZIEHL-standard RTD or Modbus TCPProtocol details see www.ziehl.de - operating manuals
Electronic Current-Transducer Type STWA1FH
The STWA1FH provides a frequency output with 0.5...20 Hz which corresponds to a current flow of AC 0 - 20 A through the transformer. Multiple loops of the conductor through the transformer reduce the current range correspondingly (e.g. with fourfold looping-through 0 - 5 A correspond to 0.5...20 Hz).For the monitoring of high currents, the STWA1FH is simply looped in the secondary circuit of a large current transformer. Consequently, the frequency output is proportional to the primary current of the transformer, e.g. 0 - 100 A for a transformer with 100/5 A (cable four times through the STWA1F).The offset of 0.5 Hz at the beginning of the transducing range is for technical reasons. During evaluation, it can be taken into account.Application: The STWA1FH enables moderately priced detection of the value of an AC-current with a DIGITAL INPUT of a PLC. Costly analogue inputs are no longer necessary.The STWA1FH is particularly suitable to evaluate the current in electric motors in machines of i.e. saws. The feed can be regulated dependent from the load of the motor of the saw. Overview of Functionscurrent-proportional frequency output 0.5 - 20 Hz = AC 0 - 20 Aoutput isolated, max DC 30 V/30 mAoutput frequency limited to 30 Hzoutput can be connected to the digital input of a PLCincorporated reverse voltage protection diodeelectrical connection via screwless pluggable terminalssupply voltage DC 10...30 VDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)option: currents up to 60 A, other frequencies
Filling level probe Type NS6123-6
Economy-priced probe with integrated measuring transducer for measuring filling level e.g. in tanks, cisterns or waters. Connection to ZIEHL-Web-Relay TR800WEB for monitoring and logging of filling levels. Alarms by emails when levels are reached, e.g. before tank is empty. Monitoring and display of levels with Digital Panelmeters MINIPAN 352 or other devices with input 4-20 mA. The probe for relative pressure is submersible. It is placed at the bottom of the tank and determines the level by measuring the hydrostatic pressure. The result is transmitted via signal 4-20 mA (2 wire). The cable (PUR) includes a pressure compensation capillary that compensates fluctioation of atmospheric pressure.Applications:Gasoil, diesel, used oilengine oil and lube oil (fresh)Rainwater in cisterns, basins and water levels in general
Pt 100-Temperature relay Type TR600 RS485/ analog
The Pt 100 thermostat TR600 is a temperature controller and monitors up to six Pt 100 sensors at the same time. Six switching points and six relays permit almost any combination of switching action. It also can select the highest temperature of a group of three or six sensors. The temperatures of two sensors or groups of sensors can be issued to 2 analog outputs i.e. for remote displays or further evaluation. Programming is very variable and simple.Due to the fact that 6 type Pt 100 sensors can be connected, the unit is especially suitable for temperature monitoring wherever up to 6 different measuring points must be monitored simultaneously:motors and generators with simultaneous monitoring of bearings and coolant.transformers with additional monitoring of the core temperature also.power machines and plantsApprovalUL E377414 Process Control Equipment, Electrical - ComponentOverview of functionsMeasuring and monitoring range -199 ... +800 °C6 sensor inputs with 2- or 3-wire connection7 relay outputs with change-over contactAlarm 1 … 6 relay K1 (11/12/14) ... K6 (61/62/64)Sensor Error Relay K7 (71/72/74) monitors sensor break or sensor short circuit.2 analog outputs, 0/4...20 mA and 0/2...10 V, with individual scaling.Universal power supply. 2 ranges AC/DC 24-60V or AC/DC 90-240 VUniversal power supply AC/DC 24-240 VTerminal for USB-Stick for up- and downloads of sets of parameters and for firmware-updatesAccessory: Installation frame ER8 for panel mountAlternative: Temperature Relay Type TR660IP
Current-Relay type STW20V
The current relay STW20V monitors the current in up to 3 lines with current transformers STWA 1 (AND circuit). If there is a current in all 3 monitored lines, the relay (2 change-over contacts) picks up. If there is no current in at least one of the lines, the relay releases.The relay works in closed circuit current. When voltage is applied to the STW, the relay signals an alarm until the it has picked up. This can be avoided if the device is constantly alive and monitoring is started by closing a contact at the Enable input. With a bridge at the Enable input, monitoring is automatically started when voltage is applied.3 inputs (transformer STWA1)3 x current-sensor S1 (powersupply required)AND-evaluationoutput relay 2 COswitching point app. AC 1 AEnable-inputstorage of alarms or Auto-ResetLEDs power on and alarm housing V4 for mounting on DIN-rail or wall-mountApplicationsIdentifies power failure with 1- or 3-phase electrical consumers, e.g. with monitoring of heating elements or heating installations where a constant heating has to be guaranteed.A further application is the identification of phase failure, monitoring of fuses, or triggering of operating hours counters.
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Control for extraction systems via bus Type STW164IP
The basic function of the device is to detect whether a current is flowing in the supply line of one of several woodworking machines. If a current flow is detected, the device opens a valve on the machine's suction channel. At the same time, the extraction system is switched on. When a machine is switched off, the device closes the associated valve with a delay. If the last machine is switched off, the extraction system also stops after a delay.Control for extraction systems with connection slide valve via bus, control of up to 32 sliders via bus lineApplication:The STW164IP serves as a central control unit. It detects the operating status of the machines by measuring their current consumption in the supply lines (current transformer STWA1(H) ) or via potential-free contacts. It switches on the central extraction system and opens the shutters on the ducts to the individual machines. 8-fold shutter modules are used to control the shutters. These can be mounted next to the STW164IP or distributed throughout the system. The latter reduces the amount of wiring required.Additional shutters can be opened to optimize the air flow. They can be assigned to different lines and prioritized. It is also possible to control cleaning and discharge.Parameterization is conveniently carried out via the network (Ethernet). If the control system is connected to the Internet, it can also be parameterized remotely.Recording the operating hours of the machines and the switching frequency of the valves provides valuable services for preventive maintenance. This means that components can be replaced during a service call before they age and fail.Accessory: Front Mounting Kit type ER8 for mounting in control panels or doors
Electronic Current-Transformer Type STWA1SH
The STWA1SH is used where current flow has to be detected, with the exact value of the current either known from the power consumption of the connected consumer or does not matter for the evaluation.The STWA1SH has an integrated electronics with transistor-output. isolated transistor-output max. DC 40 V / 40 mAoutput van be directly connected to a digital input of a PLCintegrated diode for reverse voltage protectionelectrical connection via screwless pluggable terminals2- wire, no supply voltage requiredDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)max. overload 100 A continuously, 300 A max. 10 s
Temperature Relay Type TR660IP
Temperature Relays TR660IP monitor up to 6 sensors for up to 7 limits. Different sensors can be connected at the same time, e.g. Pt 100 (RTD) and PTC thermistors. Typical applications are monitoring of motors, generators or transformers. An other application is the use as a two or more step controller with additional monitoring of over- or undertemperature or monitoring of differences in temperatures of 2 sensors.Preset programs allow easy setting e.g. monitoring of transformers with/without monitoring of temperature of core or with/without controlling a ventilator.If the evaluation "2 out of x" is activated with several connected sensors, an alarm is only triggered when the limit value is exceeded in 2 sensors. This prevents false alarms due to a fault in one sensor. Operation can be made at the device or with a standard browser via Ethernet.6 inputs for sensors Pt 100, Pt 1000 and PTC, mixed sensors possible7 alarms / relay outputsalarm 2 of x = alarm only when limit is exceeded in min. 2 sensorsmonitoring of difference of temperaturesmonitoring of rate of change of temperaturelogging of temperatures and historypreset programs for protection of motors, transformers and moreinterface ethernet TCP/IP, values available via modbus TCPprogramming with browser via TCP/IP or with joystick at devicecoloured LED display for clear display of temperatures and states of alarmsuniversal power supply AC/DC 24-270 VAccessory: Installation frame ER8 for panel mountTR660IP RS485: interface RS485 (modbus RTU)TR660IP analog: 4 analog outputs 2x 0/4 - 20 mA and 2x 0/2 - 10 V, isolated from sensor inputs, individually programmable.
Electronic Current-Transducer Type STWA2AH
The STWA2 AH is a current-transducer for AC currents 0...20/100 A. With the STWA 2 AH the value of a current can be evaluated very economically and space-saving. The output-signal 4...20 mA can be evaluated or displayed with components with analog inputs, e.g. PLCs or ZIEHL digital displays type MINIPAN ®.Overview of Functionscurrent-proportional analog output DC 4...20 mA according to AC-measuring rangemeasuring range (20/100 A) can be changed with bridgeinsulated analog outputsupply DC 9-30 V (via 4-20 mA-loop)electrical connection via screwless pluggable terminalsDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)
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Temperature Relay Type TR640IP
Temperature Relays TR640IP monitor up to 6 sensors for up to 4 limits. Different sensors can be connected at the same time, e.g. Pt 100 (RTD) and PTC thermistors. Typical applications are monitoring of motors, generators or transformers. An other application is the use as a two or more step controller with additional monitoring of over- or undertemperature or monitoring of differences in temperatures of 2 sensors.Preset programs allow easy setting e.g. monitoring of transformers with/without monitoring of temperature of core or with/without controlling a ventilator.If evaluation "2 out of x" is activated with several connected sensors, an alarm is only triggered when the limit value is exceeded in 2 sensors. This prevents false alarms due to a fault in one sensor. Operation can be made at the device or with a standard browser via Ethernet.6 inputs for sensors Pt 100, Pt 1000 and PTC, mixed sensors possible4 alarms / relay outputsalarm 2 of x = alarm only when limit is exceeded in min. 2 sensorsmonitoring of difference of temperaturesmonitoring of rate of change of temperaturelogging of temperatures and historypreset programs for protection of motors, transformers and moreinterface ethernet TCP/IP, values available via modbus TCPprogramming with browser via TCP/IP or with joystick at devicecoloured LED display for clear display of temperatures and states of alarmsuniversal power supply AC/DC 24-270 VAccessory: Installation frame ER6 for panel mount
Alternative
Current Transformer Type STWA1
The STWA1 current transformer is made to match the STW current monitor. One current transformer is required for each line being monitored. The STWA1 consists of a climate-proven sealed-in coil with toroidal tape core. The connection cables are permanently fixed to the transformer and are 1 m in length. The level of the current to be monitored is limited to 100 A continously, 300 A for max. 10s.In case of current of more than approx. 5 A, an LED can be triggered directly via the STWA 1 current transformer. Thus it's easy for users to visually monitor the current conduction in a line. The LED is protected by an anti-parallel diode or by its connection in series. A protective resistor is necessary depending on the LED used or the level of current being monitored.Weight: approx. 43 g
Electronic Current-Transducer Type STWA1FH
The STWA1FH provides a frequency output with 0.5...20 Hz which corresponds to a current flow of AC 0 - 20 A through the transformer. Multiple loops of the conductor through the transformer reduce the current range correspondingly (e.g. with fourfold looping-through 0 - 5 A correspond to 0.5...20 Hz).For the monitoring of high currents, the STWA1FH is simply looped in the secondary circuit of a large current transformer. Consequently, the frequency output is proportional to the primary current of the transformer, e.g. 0 - 100 A for a transformer with 100/5 A (cable four times through the STWA1F).The offset of 0.5 Hz at the beginning of the transducing range is for technical reasons. During evaluation, it can be taken into account.Application: The STWA1FH enables moderately priced detection of the value of an AC-current with a DIGITAL INPUT of a PLC. Costly analogue inputs are no longer necessary.The STWA1FH is particularly suitable to evaluate the current in electric motors in machines of i.e. saws. The feed can be regulated dependent from the load of the motor of the saw. Overview of Functionscurrent-proportional frequency output 0.5 - 20 Hz = AC 0 - 20 Aoutput isolated, max DC 30 V/30 mAoutput frequency limited to 30 Hzoutput can be connected to the digital input of a PLCincorporated reverse voltage protection diodeelectrical connection via screwless pluggable terminalssupply voltage DC 10...30 VDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)option: currents up to 60 A, other frequencies
Current-Transformer Type STWA1H
The STWA1H current transformer is made to match the current-relays for recognition of AC-current and for controls for deducting plants type STW. Above app. 2 A the built-in LED lights and indicates a current. A current-relay type STW or a LED can be connected to the terminals.The STWA1H has been designed for mounting in a switchgear cabinet. The housing can be fixed on a DIN-rail or with 2 screws. The maximum diameter of the monitored line is 11 mm. The current is only limited by the diameter that can be lead through the transformer. The electrical connection is made via screwless pluggable terminals.connection to current-relays type STWindication with LED from app. 2 Aindication of shortest current-pulsesBuilt-in resistor to protect LEDno supply-voltage requiredelectrical connection via screwless pluggable terminalsplug-in current transformer (Ø 11 mm)
AC-Electronic Current Transformer Type STWA1LH
The electronic current transformer STWA1LH monitors alternating currents 2 ... 20 A. For lower currents, the monitored wire can be led multiple times through the transformer. Used in the secondary circuit of transformers (e.g. 100/5 A), it is possible to monitor higher currents. The STWA1LH directly switches alternating voltage up to AC 230 V / 0,35 A.Control of ventilations or suction plantsControl of valves at suction plants in the woodworking industryFeatures Monitoring of alternating current up to 20 AResponse value adjustable 2 ... 20 ATwo-wire contact (voltage supply through output)Operating voltage AC 24 ... 230 VTransformer, ø 11 mmSpace-saving, easy mountingPotential separation between monitored current circuit and switch output
AC-Electronic Current Transformer Type STWA1S
The STWA1S has an integrated electronic with transistor-output. The switching point is 2 A. Above app. 2 A the output transistor is switched on (LOW), below app. 1.5 A it is off (HIGH). The conductor is simply pushed through the transformer.Multiple loops reduce the switching point correspondingly, for instance to 0.5 A with four loops. A supply voltage is not required.ApplicationThe STWA1S is used where current flow is to be detected, with the exact value of the current either known from the power consumption of the connected consumer or does not matter for the evaluation.For simultaneous evaluation of the current flow in several conductors the STWA1S device can be connected in series (AND circuit, pay attention to the voltage drop) or in parallel (OR circuit, pay attention to the leak current).isolated transistor-output max. DC 40 V/40 mAoutput can be directly connected to the digital input of a PLCintegrated diode for reverse voltage protection2-wire-connection, 1 mno supply voltage requiredtransformer and electronic unit enapsulated in a climate-proof housingplug-in current transformer (Ø 11 mm)max. overload 100 A continously, 300 A / 10 s
Electronic Current-Transformer Type STWA1SH
The STWA1SH is used where current flow has to be detected, with the exact value of the current either known from the power consumption of the connected consumer or does not matter for the evaluation.The STWA1SH has an integrated electronics with transistor-output. isolated transistor-output max. DC 40 V / 40 mAoutput van be directly connected to a digital input of a PLCintegrated diode for reverse voltage protectionelectrical connection via screwless pluggable terminals2- wire, no supply voltage requiredDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)max. overload 100 A continuously, 300 A max. 10 s
Electronic Current-Transformer Type STWA1SEH
The STWA1SEH is used where current flow has to be detected, e.g. to report exceeding of a limit, to switch off a machine or just report the current flow. The STWA1SEH has an integrated electronics with transistor-output. The limit is adjustable 2 - 10 A with a potentiometer. A LED displays the state.adjustable switching point 2-10 Abuilt-in LED displays state of the outputisolated transistor-output max. DC 40 V / 40 mAoutput van be directly connected to a digital input of a PLCintegrated diode for reverse voltage protectionelectrival connection via screwless pluggable terminals2-wire, no supply voltage requiredDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)max. overload 100 A continuously, 300 A max. 10 s.
Electronic Current-Transducer Type STWA2AH
The STWA2 AH is a current-transducer for AC currents 0...20/100 A. With the STWA 2 AH the value of a current can be evaluated very economically and space-saving. The output-signal 4...20 mA can be evaluated or displayed with components with analog inputs, e.g. PLCs or ZIEHL digital displays type MINIPAN ®.Overview of Functionscurrent-proportional analog output DC 4...20 mA according to AC-measuring rangemeasuring range (20/100 A) can be changed with bridgeinsulated analog outputsupply DC 9-30 V (via 4-20 mA-loop)electrical connection via screwless pluggable terminalsDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)
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Electronic Current-Transducer Type STWA4MH
STWA4MH is a measuring transducer. It measures AC up to 60A and has an RS485 interface (Modbus RTU). The measured analog current value is made available as a digital signal and can be read by a PLC, an IPC or a master computer.The conductor to be measured is passed through an opening (Ø 11 mm). In case of small currents, the sensitivity of the current transducer can be increased by looping through the current-carrying conductor several times, e.g. double looping doubles the sensitivity. The measuring range of the STWA4MH is reduced by multiple looping. To measure currents of any size, the STWA4MH is simply looped into the secondary circuit of a large current transformer with a secondary output of 5A (lead the cable through STWA4MH several times).Application:The STWA4MH enables the space-saving an cost-effective measurement of the actual value of an alternating current. Compared to transducers with analog output, the bus technology significantly reduces the effort for the hardware (inputs) and the wiring. Applications are e.g. the recording of the current consumption of electrical motors in processing machines. Here the feed can be regulated depending on the load on the motor. Another example is the monitoring of consumers, e.g. heating elements, for failure.