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

NEW: For the German regulation "NELEV" and "EAAV"The grid decoupling relay UFR1002IP is the "big brother" of the UFR1001E and monitors voltage and frequency in three-phase and AC grids.With a color LCD display (German/English) and joystick, it is even easier to operate than the UFR1001E. Measured values and settings are clearly displayed. The device can be programmed, updates installed and the alarm memory read out via the integrated IP interface. The real-time clock (with power reserve) simplifies the traceability of the alarms. Up to 1,200 V can be monitored in conjunction with the VG1200 coupling device. The device has a two-channel, single-fault-safe design and thus meets the requirements of VDE-AR-N 4105:2018-11. The function of the connected switch is monitored. If monitoring is activated, the device does not switch on again if a switch-off error is detected.Limit values for different applications are preset. Where permitted, they can easily be changed. If the nominal voltage is changed, the device automatically adjusts the limit values. With the standby input, a remote shutdown can be implemented, e.g. with a ripple control receiver.Monitoring ofUnder/over voltage 15-520V (with ZIEHL VG1200 coupling device up to 1,200 V)Under/over frequency 45-65 HzVoltage quality (10-minute average)Vector shift 2-65°ROCOF, rate of change of frequency df/dt 0.100...5.000 Hz/sZero voltage U0 (ANSI 59v0)passive anti islanding protectionFeatures:single-fault-proof, with monitoring of connected switch (can be switched off when using the integrated switch of PV and battery convertersProgrammable restart attempts in the event of a switch-on error in the connected switchRelay K3 with programmable functions, including life contact, delayed switch-on signal for switches or error messagesResponse time adjustable 0.05 … 300,0 sSwitch-back time adjustable 0 … 6,000 sPreset according to VDE-AR-N 4105-2018-11 (Pr 1.02, Pr 1.08 + 1.09) and VDE-AR-N 4105-2011-08 (Pr 1.01)Preset according to VDE-AR-N 4110-2018-11 (Pr 1.11-1.14) and bdew guideline (Pr 1.03-1.06)automatic adjustment of the switching points when the nominal voltage is changedAlarm counter for 100 alarms (with trigger value, cause and date/time, time of restart)3 programmable digital inputsStandby counter and timer with standby on/off date/timeTest and simulation function with measurement of switch-off timesSealing option and code protection for settingsInterface ethernet TCP/IP, values available via modbus TCPSimple commissioning and programming thanks to preset basic programs and transmission via IP interfaceSupply voltage AC/DC 24-270 VHousing for DIN-rail-mount, 105 mm wide, mounting height 66 mmAccessory: Installation frame ER6 for panel mount

The grid- and plant protection device UFR1001E monitors voltage and frequency in plants for owngeneration of electricity. It complies with the requirements of VDE-AR-N 4120:2018-11, VDE-AR-N 4110:2018-11, VDE-AR-N 4105:2018-11, G98 and G99, ÖVE/ÖNORM E 8001-4-712:2009 and other standards for generators connected to the public grid.The UFR1001E is a dual-channel device and thus one-fault-proof. The function of the output-relays and of the connected switches can be monitored with feed-back contacts. When a connected switch does not switch off, the UFR does not switch on again. When a switch does not switch on it makes 2 restarts and thus improves availability of monitored plant.The limits are pre-set according to VDE-AR-N 4105-2011-08, VDE-AR-N 4105:2018-11 and other standards. They can be changed if required and be protected with a code and/or a seal.With a 2-step test both channels can be tested individually and the triggering time of connected switches is measured.The standby input allows a remote shutoff e.g. with a RCR.NEW: Our UFR1002IPWould you like to measure upt o 1,200 V?You need an interface (Modbus TCP)?You want a plain text LCD display?You need a seperate life contact?Then Take a look at the new UFR1002IP! 

Undervoltage monitor for threephase networks without N for monitoring on voltage failure. The voltage is being measured between phases and an artificial neutral point. At symmetrical decrease of the voltage to approx. 50% of the nominal value or in case of failure of a phase the integrated relay (1 change-over contact) releases with a delay ofapprox. 1s. With engines runningon on 2 phases, so much back voltage can be produced that the failure of a phase may be not detected. The SW31K is available for measuring voltages AC 400 V and AC 690 V. As supply voltage in the standard version AC 230 V is needed.ApplicationMonitoring of three-phase networks on loss of a phasemonitoring of fuses

For currents >5A current monitors require a current transformer with secondary 1 or 5 A and a rated capacity of 1.5 VA. The primary rated current must be appropriate to the max. expected current (fuse). Tube ore wound current transformers can be used.For primary rated currents of 60 to 500 A we recommend using AS tube current transformers, suitable for the Cu-rail of 30 x 10 mm or 2 x 20 x 10 mm or round conductor of 28 mm. The transformers have Class 1 accuracy and a voltage resistance of up to 800 V. When ordering, please indicate desired  primary and secondary rated current. 

For currents >5A current monitors require a current transformer with secondary 1 or 5 A and a rated capacity of min. 1,5 VA. The primary rated current must be appropriate to the max. expected current (fuse). Tube or wound current transformers can be used. We recommend the use of WS tube current transformers for primary rated currents of 5 to 30 A.The transformers have a class 1 accuracy and a voltage resistance of up to 800 V.When ordering, please indicate desired primary and secondary rated current. 

The current transformers STWA3D for use with residual current monitor RCM1000V are available with 4 different inside diameters. STWA3D20-70 can be snapped on a DIN-rail, vertically or horizontally or be fixed with screws. The Bracket for mounting is included. STWA3D125 can only be mounted with screws. 

Relays for 3-phase networks type PSSW1 monitor 3-phase networks for phase-sequence, asymmetry and over- and undervoltage.ApplicationsMonitoring of 3-phase-networks at heat pumps, compressors or at machines at building sites.FunctionsOver- and undervoltage, adjustable ± 2-20 % (common)Asymmetry adjustable 5-15%Phase lossPhase sequenceSwitching delay adjustable 0,1-12 s (for voltage and asymmetry)Bifrequential measuring input 50/60 HzDisplays (4 LEDs for)Over-/undervoltageAsymmetryPhase-sequence/lossState of relay 

The SolarYes monitors outputs of inverters in PV-systems. Its output-relays (2 potential-free contacts) switch, when there has been no current during the last 24 hours in one of up to 8 monitored lines. Thus the failure of an inverter or a fuse is detected and reported. The operator can initiate repair immediately and saves downtime.The SolarYes is a simple, easily understandable and economical solution, that protects PV-systemsfrom downtimes.The device is mounted in a switch cabinet or a distribution box. The current is measured contactless with simple and solid current transformers, that are mounted over the line at any position, e.g. near the fuses. A subsequent installation in an existent system is possible. Over the course of 24 hours occurring minimal currents (at night there can be wattles currents, caused by interference suppression capacitors in the inverter) are automatically measured and faded out in the evaluation.The minimum response limit of 0,3 A allows measuring of low current-levels. The limit can de reduced by leading the monitored line multiple times through the transformer (Ø 11 mm). In case of false alarms, e.g. with snow on the solar modules, the monitoring interval can be extended to up to 8 days or the alarm can be suppressed with a switch.The 2 output-relays can switch alarm-lamps or electroacoustic transducers. The connection of an alarm system or another monitoring unit also is possible.Inputs8 inputs for current transformers STWA1 or STWA1H (max. 100 A)Not connected inputs disconnectibleSensitivity adjustable AC 0,3…2,4 A (lower values by leading the monitored line multiple times through the transformer)Autocalibration of inputsEnable-inputDisplays and Controls8 LEDs for inputs8 LEDs for alarms4 LEDs for display of state and programming2 LEDs for relays1 LED enable-input3 pushbuttonsOther features:2 change-over contacts, nc and no individually programmableAutocalibration for easy startupPower-saving (Eco-Mode), disconnectiblePower consumption <0,5 W, <1,2 VAUniversal supply-voltage AC/DC 24-240 VHousing for DIN-rail mount, 70 mm, mounting height 55 mmAccessory: Front mounting kit type ER4

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.

The split core current transformer KBR18S is especially suitable for being subsequently mounted in existing facilities. With its primary 60 A it matches perfectly the 63 A with which domestic connections are usually fused. The secondary 1 A are connected to EFR. The inputs of the EFR are preset for this value. A clip for mounting on DIN-rail is included.For EFR three current transformers are required.

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.

Current-relays STW 200 monitor AC-currents for falling below an adjusted limit. The ranges 12 ... 120 mA and 0.1 ... 1 A allow the monitoring of LED-Lamps as well as incandescent lamps in obstruction lights. In case of main lamp failure a relay switches on the reserve lamp. An alarm contact is available for signalling a lamp failure.ApplicationMonitoring of LED-Lamps or light-bulbs in twin obstacle lights with alarm (lamp failure) and switching on a reserve lamp. Monitoring of the function of single obstacle lights. At conventional solutions with a change over contact, there is a short on-pulse at the reserve lamp every time when the system is switched on. The STW 200 switches it on only in case of a failure of the main lamp. LED-lamps can also be monitored with long cables between relay and lamp. When monitoring LED-lamps a total failure is detected. Failures of single LEDs are not detected.Measuring input 12…120 mA for LED-lampsMeasuring input 0,1…1 A for incandescent lamps (bulbs)Adjustment range 10…100%Relay for switching on reserve lamp in operating current modeRelay for Alarm in closed current modeCable-length from relay to lamp up to 500 mDisplay green = o.k., red = low current alarmHousing 70 mm wide, mounting height 55 mm

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

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.

ZIEHL current-relays STW1000 have 4 measuring-ranges. They monitor most of the common AC- and DC-currents for over- or undercurrent. Currents up to 10 A can be connected directly to the STW. For higher currents external transformers (to inputs 1/5 A) or Shunts (input 60 mV) can be connected.Measuring inputs 1 A, 5 A, 10 A, direct or via transformerMeasuring input 60 mV for ext. ShuntAutomatic detection of AC/DCMonitoring of over- or undercurrentAdjustable range 10...100% INHy s teres i s adjus tabl e 5...50%Start-up delay 1...20s (input enable)Switching delay 0,1...10s for fading of short peaksOutput-relay 2 changeovercontacts (co)Operating- or closed-circuitmode for relays selectable with bridge

Motor load monitors monitor motors for overload and/ or underload. They are simply wired into the motor supply line and evaluate the phase angle between the voltage and the motor current or, optionally, the active current. That facilitates monitoring drive motors which enables, for instance, detecting a break in a V-belt or the blockage of a filter or valve.As current directional relays, they monitor the direction of the flow of current to generators and whether current is being supplied or consumed.The digital display and many adjustment facilities allow optimising the device for each task. The resolution of the measuring input is 0.1 A. When using a current transformer, multiply this by the transformer factor.Cosfi application / Active currentV-belt monitoringFan monitoringPump monitoringConveying equipment (message if low is too low)StirrersWear monitoringTool wearLoad protection of motors, plants and drivesCurrent direction applicationWarning or shutdown if a generator is consuming instead of supplying currentIn an alternating current motor (inductive load), the current follows phase angle. If the load is decreasing, it increases so that the power factor (cosfi) decreases. This change of phase angle is a gauge of the change of the load on the motor. The COSFI 100 V motor load monitor is suitable for sinusoidal alternating current signals.Digital displays for the power factor (cosfi) and active currentInductive / capacitive load display2 limits / output relayEach adjustable for min, max, or min/maxMonitoring of 2 x cosfi, 2 x active current or 1 x cosfi and 1 x active currentCurrent display scalable (converter factor)Hysteresis and switching delay adjustableAuto-reset or locked shutdownRestarting attempts programmable 0…10Auto-enable via current (> 0.2A) or via start signal (open bridges E1 - E2)Auto-Enable (Strom) oder über StartsignalPower-on delay can be adjusted 0…99sCurrent input max. 10A through current transformer (sec. 5A) 999 AWire break in current measurement circuitPTC thermistor input with short-circuit detectionDistributor housing for panel mounting 4TE, front-to-back size 55mmMounting on 35mm DIN EN 60715 standard rail or with screws (optional)

RCM1000V RCM100V monitors residual currents in grounded power supply systems. Used as a current relay it monitors AC- or pulsing DCcurrents for exceeding upper or lower limits. Insulation faults can be caused by damages (mechanical, thermic or chemical) of insulations or also by humidity or pollution. At currents > app. 250 mA (at 230 V) at a location, the fault can lead to danger of fire.Applied as current relays RCM1000V can among others monitor current in the neutral conductor. Nonlinear loads, e.g. switching power supplies in PC, printers or lights with EGC, cause harmonics in the neutral conductor: Even when the load is symmetric, the harmonics can lead to an overload in the neutral conductor. RCM1000V detect and report this overload.Residual current monitors detect these faults in widely branched power supply systems and make a signal before additional damage develops. By displaying the residual current also stealthy changes can easily be detected and localized by switching on and off parts of the power supply system.Particularly useful in monitoring in systems in which no fault current circuit breaker can or shall be used, because an immediate switching would have wideranging consequences, such as breakdown of computersystems or interruption of processes of sensitive goods. RCM1000V do NOT replace fault current circuit breakers for protection from electric shock but they can complement it by detection an fault in the insulation before the systems has to be shut off.Monitoring of residual currents2 limits for alarm and tripMonitoring of current, 2 x under- or overcurrent or windowsMeasuring range 0,003 … 9,999 ASetting range 0,010...9,999 ADisplay can be scaledTest-button and automatic test every 24 hoursInput for current transformer STWA3D with monitoring of transformerStart-up delay to suppress alarms when switching on4 digits bright LED-display for measured values and programmingLEDs for alarms, state of relays and unitsLimit, hysteresis, switching delay and switch off delay individually programmableFunction of relays (nc-, or no-mode) and interlocked switching or autoreset programmableUniversal supply voltage AC/DC 24-240 VHousing for DIN-rail mount, 70 mm wide, mounting height 55 mmAccessory: Front mounting kit type ER4

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)

Phase-sequence relays DRR10 measure the sequence of the phases when being switched on and switch - if necessary - the rotation of the field by changing 2 phases.The integrated PTC-monitor protects the motor from overheating.Applications are especially machines and equipment, that is operated at variable locations e.g. at building sites. Pumps, compressors and vacuum cleaners always run correctly. Nomore search for faults or change of wiring necessary.Overview of Functionautomatic change of wrong phase-sequence when connected falselyrunning backward of motors is avoidedintegrated PTC-protection for motorenable-input for direct switching on/off of the motor with DRR 10max. 3 x 12 Aswitch-on currents 30 A / max. 4 s / 60 A / max. 1 shigher currents with external contactorsintegrated protection for relay contactsintegrated protection from over-temperaturehousing for mounting in fuse-boxes or switchgearcabinets, mounting height 55 mm

The SW32V voltage relay is a high-quality voltage monitor with a large measurement range for monitoring direct, alternating and three-phase networks for overvoltage and/or undervoltage. In three-phase current networks, phase symmetry and phase sequence can be monitored in addition.The limits are set in volts. That allows using the unit with various rated voltages.The digital display is used to display the measurements and to precisely set limits, response times and functions.Summary of the functionsFor use as a voltage monitor in energy generation and distribution plants, especially in-plant systems such as PV plants or combined heat and power plants. Voltage monitoring in machines and plants to prevent errors, damage or failures in sensitive equipment or devices.Voltage monitoring in direct current networks DC 10.0…600 VVoltage monitoring in alternating current networks AC 15.0…480 VVoltage monitoring in three-phase current networks with//without N up to 3AC 830 VPreset programs for grid- and plant protection according to VDE-AR-N 4110:2018-11Asymmetrical and phase sequence monitoring connectableReal root mean square measurement (for AC, both half waves)2 Alarms/output relays, 1 each change-over contactAlarm and reset delay for every limit value can be individually setSetting of limits and hysteresis in voltsMeasurement value simulation to check the settingsCode lock can be enabledControl voltage AC/DC 24-270 VDistributor housing for panel mounting, 4 TE (70 mm), front-to-back size 55 mmMounting on 35 mm mounting rails DIN EN 60715

The current relay STW20K monitors the current in up to 3 lines with current transformers STWA1 (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.ApplicationsIdentifies 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.If the switching threshold is not reached due to low currents of less than 1 A, the monitored wire should be led multiple times through the transformer. Not required inputs have to be connected to a occupied input.Features3 current transformers STWA1AND-evaluationrelay output 2 COSwitching point approx. AC 1 ALED-display for power on and alarmhousing design K

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 STWA2AHcurrent-proportional analog output DC 0...20 mA = AC 0...15 A (insulated)electrical connection via screw less pluggable terminalsno supply voltage requiredDIN-rail-mount or with screwsplug-in current transformer (Ø 11 mm)max. overload 100 A continuously, 300 A max. 10 s

Phase-Sequence-Change Relays DRR20 measure the sequence of the phases and switch – if necessary the rotation of the field. At the output (connect relays K1 and K2 in series in this application) two contactors are connected. The contactor at the normally-open contact of K2 switches the phases 1:1without changing them, the second (atnormally-closed contact) changes 2 phases.When switching on with phasesequence ok, relay K2 picks up. With wrong phase-sequence it remains released. After K2 has switched, K1 picks up. K1 also releases first. This makes sure, that no wrong contactor can be picked up under any condition. Additionally the DRR20 monitors the three phases for asymmetry and undervoltage. If the limits are exceeded, the K1 switches off (respectively doesn't pick up) and protects the connected motor from damage. The device can also be used as a monitor for undervoltage, asymmetry or phase-sequence.Applications are machines and equipment that is operated at variable locations, e.g. at building sites. Pumps, compressors and vacuum-cleaners alwaysrun correctly and they are protected from damage by undervoltage or asymmetry.automatic change of wrong phase-sequence when connected falsely (2 contactors afforded)running backward of motors is avoidedno switching on at asymmetry or undervoltagerelay K2 picks up when phase-sequence is correctrelay K1 picks up (after K2) when symmetry and voltage is correct3 LEDs for state of relays and errorsmeasuring-voltage 3 AC 400 Vlimit asymmetry adjustable 5…25 %limit undervoltage adjustable 70…95 %alarm-delay adjustable 0,1…10 s (undervoltage and asymmetry)no supply-voltage required