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TRIP RELAY, YRU, YRU-41, YRU 41, VOLTAGE RELAY, VOLTAGE SENSING RELAY, YRU41

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A DIN rail mounted adjustable 0.1-10V adjustable DC voltage tripping relay. The relay has a green supply LED and a red LED to indicate the relays status. On connection of the supply the green LED illuminates, the output relay is energised when the monitored voltage rises above the level selected via the front potentiometer. The output relay will de-energise when the voltage falls back below the level selected less the fixed 1% hysteresis. If the auxiliary supply is lost at anytime the relay will also de-energise.

0.1-10VDC ADJUSTABLE TRIPPING RELAY
Earth Fault relays, ywrief, ywri/ef, ywri ef,ywrief, ywri/ef, ywri ef, YWRI/EF/I, CTB, CTB27, CTB35, CTB70, CTB120, CTB210

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Din rail mounted current sensing relay dedicated for earth fault monitoring in conjunction with a core balance CT. The YWRI/EF has three adjustable earth fault input ranges selectable via terminal tapings 5-100mA, 0.05-1 A, 0.5- 10A. On connection of the auxiliary supply the green LED illuminates. Exceeding the set earth fault level and after the adjustable tripping time has elapsed, the output relay energises and the red LED illuminates. The YWRI/EF has a fixed hysteresis of 5% of the set value, should the earth fault level fall below the set value less 5%, the output relay will de-energise and the red LED will extinguish (auto reset). However, should the optional latch facility be utilised between terminals Y1 and Y2 via a remote NC contact, the NC contact has to be opened or the auxiliary supply removed to reset the unit (manual reset). The YWIR/EF via terminals Y2 and B1 also has a remote test input operated by a NO contact. On request an inverse operating version can be supplied, type YWRI/EF/I, this version energises on connection of the auxiliary supply and de-energises on earth fault. Please note that this version will be without the latching function, but will still be with the test input.

AC earth fault relay ywri.ef
Earth Fault relays, earth fault relay, ywrief, ywri/ef, ywri ef,ywrief 30amps, ywri/ef 30 amps, ywri ef 30 amps, YWRI/EF/I/30A, k1021

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Din rail mounted current sensing relay dedicated for earth fault monitoring in conjunction with a core balance CT. The YWRI/EF 30Amps has an adjustable earth fault range of 1.5-30Amps. On connection of the auxiliary supply the green LED illuminates. Exceeding the set earth fault level and after the adjustable tripping time has elapsed, the output relay energises and the red LED illuminates. The YWRI/EF has a fixed hysteresis of 5% of the set value, should the earth fault level fall below the set value less 5%, the output relay will de-energise and the red LED will extinguish (auto reset). However, should the optional latch facility be utilised between terminals Y1 and Y2 via a remote NC contact the NC contact has to be opened or the auxiliary supply removed to reset the unit (manual reset). The YWIR/EF 30Amps via terminals Y2 and B1 also has a remote test input operated by a NO contact. On request an inverse operating version can be supplied, type YWRI/EF/I 30Amps, this version energises on connection of the auxiliary supply and de-energises on earth fault. Please note that this version will be without the latching function, but will still be with the test input.

AC earth fault relay ywri/ef 30amps
Lift Industry Relays, Phase Failure with Thermistor Monitor, SEQUENCE, PHASE FAILURE, THERMISTOR RELAY,Monitor, MOD-PTC, MOD PTC, MODPTC,

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Din rail mounted combined phase failure, sequence thermistor relay (Klixon version also available). Available in either 3 or 4 wire and self powered, with separate output contacts and LED indication for phase faults and thermistor faults. Both contacts energise when all is healthy, the phase relay R2 will de-energise when a phase sequence error is detected or a phase is lost (and in a 4 wire version also the Neutral). The thermistor circuit relay R1 will de-energise on detection of either a short circuit or overheat (resistance below 30 Ohms or above 3.3 KOhms). Both relays are slightly delayed (delay fixed) to avoid nuisance tripping. The LED indicators will diagnose the circuit problems, a healthy situation results in all the LEDs being illuminated.

COMBINED PHASE FAILURE, SEQUENCE & THERMISTOR RELAY MOD-PTC
Lift Industry Relays , SEQUENCE, PHASE FAILURE, THERMISTOR RELAY, YWRPTC4,

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Din rail mounted combined phase failure, sequence thermistor relay (Klixon version also available). Available in either 3 or 4 wire and self powered, with separate output contacts and LED indication for phase faults and thermistor faults. Both contacts energise when all is healthy, the phase relay R2 will de-energise when a phase sequence error is detected or a phase is lost (and in a 4 wire version also the Neutral). The thermistor circuit relay R1 will de-energise on detection of either a short circuit or overheat (resistance below 30 Ohms or above 3.3 KOhms). Both relays are slightly delayed (delay fixed) to avoid nuisance tripping. The LED indicators will diagnose the circuit problems, a healthy situation results in all the LEDs being illuminated.

COMBINED PHASE FAILURE, SEQUENCE & THERMISTOR RELAY YWRPTC4 (SPCO + 1NO)
Level Control Relays,MOD-W-1,MODW1, MOD W 1, liquid level relay

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An attractive modern designed conductive probe type level control relay in a din rail mounted modular style housing of 1.5 modules width (27mm). The MOD-W-1 is a transformer based conductive probe level control relay and is hence available in dedicated AC voltages only. The sensitivity is potentiometer adjustable 2-100 Kohms, also a potentiometer is fitted to adjust a delay on tripping timer 0.1-10 secs, useful to delay threshold tripping due to fluid movement in tanks. An eight way function switch is provided (designated A to H) to switch between "pump up" and "pump down" modes along with a relay proving function "permanent on" or "permanent off", the switch will also determine how the adjustable time delay will function. Regulation of two levels - pump down mode: The relay energises when the high level probe is reached and de- energises when the level falls belowthe low level probe. Regulation of two levels - pump up mode: The relay de- energises when the high level probe is reached and energises when the level falls below the low level probe. Regulation of one level - pump down mode selected: Connect the maximum and the common terminals together. In this case a single probe only is used and the relay operates when the probe is immersed.

CONDUCTIVE PROBE LEVEL CONTROL RELAYS MOD-W-1 (spco)
Level Control Relays,YWRW, 11WRW, 8WRW, YWR2W, 11WR2W, liquid level relays, pump control relays, 8WRWO

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Din rail mounted or 8/11 pin plug in conductive probe level control relays for the control of maximum and/or minimum levels of conductive liquids. Regulation of two levels "pump down" mode -The relay is energised when the high level probe is reached and de- energises when the level falls below the low level probe. Regulation of two levels "pump up" mode -The relay is de-energised when the high level probe is reached and energises when the level falls below the low level probe. Regulation of one level "pump down" mode selected -Connect the maximum and common terminals together. In this case a single probe only is used and the relay energises when the probe is immersed. Or in "pump up" mode the relay operation is reversed. Prove relay test feature/override -With probes connected the front selector switches can be used to control the relay providing a permanent "ON" or permanent "OFF".

CONDUCTIVE PROBE LEVEL CONTROL RELAYS YWRW, 11WRW, 8WRW, 8WRWO (spco) YWR2W, 11WR2W (dpco)
YWRICT5,CURRENT RELAYS

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A Din rail mounted current control relays with initial start up delay & delay on tripping for use with a current transformer, this unit features SPCO output, dedicated 250mA - 5Amp input with selectable manual or auto reset.


The YWRICT5 also has initial start up adjustable time delay of 0.1-10 secs, adjustable delay on rising current 0.1-10 secs,  adjustable delay on falling current 0.1-10 secs and dual LED indication

CURRENT CONTROL RELAY FOR USE WITH 5AMP CT
CURRENT RELAYS, YWRI.H, YWRI H, YWRIH, YWRI.H.CT5, YWRIHCT5, YWRI H CT5

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CURRENT CONTROL RELAYS WITH INITIAL START UP PULSE & DELAY ON TRIPPING


The YWRI.H current relays can be direcly connected from 5mA up to 10 Amps and are suitable for AC or DC current monitoring. These current relays have 3 independently adjustable 0.1-10 secs time delays. Initial start up delay timer, activated by the connection of the auxiliary supply, therefore if a control circuit is going to be permanently live this time delay will only ever be active once, a delay on rising current when the monitored current rises above the set level as selected by the front potentiometer and a delay on falling current, when the monitored current falls below the set level plus the hysteresis.


For monitoring above 10Amps a YWRI.H.CT5 should be used, with all the same features as the standard YWRI.H but with a dedicated 5Amp input to match the output of a standard 5Amp CT.

CURRENT CONTROL RELAYS WITH OUTPUT RELAY INITIALLY ENERGISED START UP PULSE & DELAY ON TRIPPING, YWRI.H
Current relays, ywri, ywrii, ywri/i, ywri5, ywri/5, YWRI5A, YWRI5C

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CURRENT CONTROL RELAYS WITH INITIAL START UP DELAY & DELAY ON TRIPPING


The YWRI and YWRI/I current relays can be direcly connected from 5mA up to 10 Amps. (Above 10 Amps a CT must be used) and are suitable for AC or DC current monitoring. These current relays have 3 independently adjustable 0.1-10 secs time delays. Initial start up delay timer, activated by the connection of the auxiliary supply, therefore if a control circuit is going to be permanently live this time delay will only ever be active once, a delay on rising current when the monitored current rises above the set level as selected by the front potentiometer and a delay on falling current, when the monitored current falls below the set level plus the hysteresis.


 

Current relay. With separate adjustable Start up delay & delays on rising and falling current YWRI
Current Relays, 11wria, 11wrid, under current, over current, 11wri/a, 11wri-a, 11wri a, 11wri/d, 11wri-d, 11wri d,

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11WRIA - 11 pin plug in current sensing relay AC current only.


11WRIA/I - 11 pin plug in inverse acting current sensing relay AC current only.


11WRID -11 pin plug in current sensing relay DC current only.


11WRID/I - 11 pin plug in inverse acting current sensing relay DC current only.

Current Relays with start up delay. 11wria 11wrid 11wria/i & 11wrid/i
Dimensions, Timers & Time Clocks

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Dimensions of timers and control relays.
Dimensions
Foxtam Classic range Din rail 8/11 pin plug in, Mains Restoration Auto Restart, Voltage Control Relays, BROWN, MAINS, RESTORATION, RELAY, LYRAPTU, L8R2APTU, L11RAPTU, L8R2APTU, L11R2APTU

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Din rail mounted or 8 & 11 pin plug in SPCO and DPCO “mains restoration auto restart relays”. The voltage and supply sensing built into these units are designed to sense voltage dips and momentary loss of supply referred to as “Brown Outs”. This phenomena is a particular threat in the water industry and regularly occurs at remote pumping locations, especially during electrical storms. Left unchecked, a supply dip can “lock out” all or part of a control system, causing system malfunctions over a wide area necessitating engineers’ site visits, just to reset and restart a control system. By monitoring the supply these tried and proven Foxtam units will provide the “auto restart” signal to reset and restart the control system without the need for a site visit. For added convenience DPCO units are also available with the extra contact used as say a telemetry output to notify an operations centre that an incident has occurred.

DIN RAIL 8 & 11 PIN PLUG IN DEDICATED VOLTAGE, MAINS RESTORATION BROWN OUT RELAYS
Voltage Control Relays,Signal Control Relays and Trip Amplifiers, Signal Control Relays & Trip Amplifiers, YWRU2T/10VDC,ADJUSTABLE DUAL SETPOINT, trip amp

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Dual setpoint 0.1-10V DC relay. Providing two separately controllable trip levels. With R1 selected as the "High" level and R2 as the "Low" level. When the monitored signal voltage rises above R2 set level R2 relay will energise. If the voltage continues to rise above R1 set level, relay R1 will energise. Conversely as the monitored voltagefalls R1 will de-energise, if the fall continues R2 will de-energise. The unit has a built in fixed hysteresis of 2% at each setpoint to avoid relay "chatter".

DUAL SETPOINT ADJUSTABLE 0.1-10V DC trip amp YWRU2T/1OVDC (2 x spco)
 Four way AC Current to analogue signal converter, CURRENT TRANSDUCER, FOUR WAY AC CURRENT TRANSDUCER, yw4, F-50, F-50A, F 50 A, F50A, F 50A

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A din rail mounted four way AC current transducer. Accepting up to four inputs from the miniature split core current transformers supplied as a "kit" with the unit and giving four isolated analogue voltage signal outputs, either 0-5V DC or 0-10V DC. The maximum primary current possible is 50Amps which is compatible with the 10mm ID of the split core CT. The YW4 has individual pairs of terminals for the CT inputs, whilst the output channels share a common 0V rail. The YW4 requires a separate AC or DC supply voltage with isolation offered via an internal transformer or DC to DC converter.

FOUR WAY AC CURRENT TRANSDUCER 4 x 0.1-50 AMPS INPUTS yw4
Keywords  In Line Current Sensing Switch, YRI-41, in-line current proving switch, yri, 41, 31, yri-31, yri41

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The YRI-41 ia a direct connected current proving switch available in five different adjustable ranges. 1mA-100mA. 10mA-1A. 30mA-3A. 50mA-5A. 100mA-10A. External current transformers cannot be used with the YRI-41.  The current is monitored on its own supply hence a seperate auxiliary supply in not required.


NOTE. the monitored load and the supply voltage must be from the same source and of the same voltage potential.


On connection of the supply/load the green LED illuminates. should the load exeed the adjustable set point the SPCO relay output will energise and the red LED will illuminate.  Should the load then fall below the set level  less than a nominal 1% hysteresis the output relay will de-energise and the red LED will be extinguished.


THE YRI-41 REPLACES THE YRI-31.

IN LINE CURRENT PROVING RELAY YRI-41
Keywords  In Line Current Sensing Switch, MOD-I, MODI, MOD I,

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"With delay to energise on a rising current". The output relay delays to energise for up to 10 secs when the monitored current rises above the set level as selected by the front potentiometer. It will de-energise when the current falls below the set level less a fixed hysteresis of 1 % against the set level. De-energisation will also occur if the auxiliary supply is lost. The MOD-I can be used to monitor a 3 phase motor by passing one phase into terminal A1 and out on the relevant I., terminal to the load. The panel Neutral needs to be connected to terminal A2 even if the load does not have a Neutral connection.

In Line Current Sensing Switch MOD I (SPCO)
Lift Industry Relays, LIFT ROOM TEMPERATURE RELAY, YRTCA, YRTC.A, YRTC A, NTC3K

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A din rail mounted temperature sensing relay supplied complete with a panel mounted temperature sensor. The unit is designed to facilitate compliance with The Lift Directive regulations EN81-1 Traction Lifts and EN81-2 Hydraulic Lifts. These regulations require that the lift room temperature is monitored. In the case of traction lifts +5°Cto +40°C and for hydraulic lifts +15°C to +35°C. A permanent auxiliary supply is required on to terminals A1 and A2. The 22.5mm panel mounted sensor needs to be connected to terminals P1 and P2. When the room temperature is between the two fixed set points, the output contact will be made between terminals 11 and 14 after a fixed time delay of 10 seconds. On deviation from these fixed set points, the output contact will open. Also the contact will open on loss of the auxiliary supply, thus making the unit fail safe. A green LED indicates that the auxiliary supply is present, a red LED indicates that the output contact is closed and thus the temperature is within specification.

LIFT ROOM TEMPERATURE RELAY YRTC.A
JAY, MIDLAND, GBP, Mains Restoration Auto Restart,

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Din rail mounted SPCO “mains restoration auto restart timers”. The voltage and supply sensing built into these units are designed to sense voltage dips and momentary loss of supply referred to as “Brown Outs”. This phenomena is a particular threat in the water industry and regularly occurs at remote pumping locations, especially during electrical storms. Left unchecked, a supply dip can “lock out” all or part of a control system, causing system malfunctions over a wide area necessitating engineer’s site visits, just to reset and restart a control system. By monitoring the supply these tried and proven units will provide the “auto restart” signal to reset and restart the control system without the need for a site visit.

MIDLAND JAY BROWNOUT TIMERS GBPXXXX
4PCO TIMERS, Foxtam Classic range Din rail 8/11 pin plug in, Time Delay On Make Instantaneous Contact, uni-2x, uni 2x, uni2x, uni-4x, uni4x uni 4x,

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An Attractive modern designed multi voltage and multi time range dedicated delay on make timer with an instantaneous contact. Available with either 2 x SPCO or 2 x DPCO. The function is initiated by a supply on terminals A1 & A2 which immediatlet energises the instant contact(s) and commences the timing, the relay contacts will then energise after the timing period.

Multi voltage multi time range, on delay with instantaneous contact. uni-2x(spco) uni-4x (dpco)
Phase Failure Relays, sequence,mod-p-1, 3 wire, mod-pn-1,4 wire, mod-p-2, mod-pn-2,modp1, modpn1, modp2, modpn2, modp, mod-p, MOD-p2, MOD-p1

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An attractive modern designed range of combined phase failure and sequence relays in a din rail mounted modular style housing. Utilising transformer technology the units are available in either 3 wire or 4 wire versions, the 4 wire version also trips on loss of the Neutral. Both types are available with either a SPCO or DPCO output. On power up with all three phases present (plus the Neutral if applicable) and in the correct sequence the output relay/s will energise, the green and red LEDs also illuminate. On loss of a phase, (or Neutral 4 wire versions), drop in voltage below Umin levels, or incorrect phase sequencing the output relay/s after a fixed time delay of 0.5secs will drop out and the red LED will be extinguished. A green supply on LED only illuminated means that there is a supply to the unit but there is a supply fault of phase loss, under volts, or sequence.

phase failure & sequence relay mod-p-1 (3 wire spco) mod-pn-1 (4 wire spco) mod-p-2 (3 wire dpco) mod-pn-2 (4 wire dpco)
Phase Failure Relays, sequence,ywrp, 8wrp, 11wrp, ywr2p, 11wr2p, 3 wire, 4 wire,sequence ywraptus, ywr2aptus

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Combined phase failure and sequence relays, available in either a din rail or 8/11 pin plug housing. The output is SPCO with an option of DPCO on either the din rail or 11 pin version. Utilising transformer technology the units are available in either 3 or 4 wire versions, the 4 wire version tripping on loss of the Neutral. On power up with all three phases present (plus the Neutral if applicable) and in the correct sequence the output relay will energise, the green and red LEDs also illuminate. On loss of a phase, (or Neutral 4 wire versions), drop in voltage below Umin levels, or incorrect phase sequencing the output relay/s after a fixed time delay of 0.5secs will drop out and the red LED will be extinguished. A green supply on LED only illuminated means that there is a supply to the unit but there is a supply fault or either a combination of; phase loss, under volts or sequence error.

phase failure & sequence relay ywrp 8wrp 11wrp (spco) ywr2p 11wr2p (dpco)
Phase Voltage Balance, sequence ,ywrups, 11wrups, 8wrups, ywr2ups, phase failure

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Phase failure relays with independent over and under voltage control, with the option of additional sequence control. Available in either a din rail or 8 & 11 pin plug in housing SPCO with a DPCO option in the din rail housing. All units can be specified as 3 wire or 4 wire. As an option in the din rail housing an adjustable time delay can be specified (not true delay off), which is effective against voltage control, phase sequence (if applicable), but not phase loss or Neutral loss on 4 wire versions (loss of L3 only would produce a time delay). The units are transformers based and thus will ignore transients and harmonic distortions. The output relay is energised when all three phases are connected and in sequence (if applicable) and within the set voltage limits. The output relay/s will de-energise if one or more voltages between phases are under the value of the minimum set level or above the value of the maximum set level, less any set time delay (if applicable). The units will also de-energise on loss of a phase or incorrect sequence (if applicable). Separate red LED indicators indicate over and under voltage conditions. If both are illuminated this indicates a phase sequence error (if applicable). A green LED indicates output relay status.

phase failure relay with over & under voltage control ywrup(S),11wrup(S),8wrup(S),(spco) ywr2up(S) (dpco)
Phase Voltage Threshold, phase failure relay, under voltage, ywrkptu, ywr2kptust, sequence, true delay off,

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Phase failure relays with adjustable under voltage control, with the option of additional sequence control. Available in a din rail housing with a SPCO or DPCO output option. Both units can be specified as 3 wire or 4 wire and are self powered (no separate auxiliary supply is required). A range of nominal L-L input voltages can be specified from 110V L-L to 440V L-L, an under voltage setpoint can be set adjustable 5-25% of the specified nominal. The units will also trip on phase sequence (if specified), phase loss and on 4 wire units deviation of the Neutral. All tripping eventualities are subject to a delay, the delay being True Delay Off, adjustable 0.1-10secs as standard. If you loose everything you will still benefit from the delay timer, unlike many other types of phase failure relays. This makes these units ideal for mains to generator changeover systems where short supply interruptions are best ignored, thus eliminating false engine starts.

phase failure relay with under voltage control & true delay off ywrkptu (spco) ywr2kptu (dpco)
Phase Voltage Threshold, phase failure relay, under voltage, ywr2akptust, sequence, true delay off,

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Phase failure relays with adjustable under voltage control and hysteresis, with the option of additional sequence control. In a din rail housing and DPCO output, can be specified as 3 wire or 4 wire and is self powered (no separate auxiliary supply is required). A range of nominal L-L input voltages can be specified from 110V L-L to 440V L-L, an under voltage setpoint can be set adjustable 5-25% of the specified nominal and a return hysteresis adjustable 5-50% of the setpoint. For example, if a 400V unit is set with an under voltage control of 10%, the unit will trip (de- energise) at 360V, if the hysteresis is set at 50%, the return point equates to +50% of the under voltage control, i.e. +50% of 40V = 20V, therefore the unit will re-energise at 380V. The units will also trip on phase sequence (if specified), phase loss and on 4 wire units deviation of the Neutral. All tripping eventualities are subject to a delay, the delay being True Delay Off, adjustable 0.1-10secs as standard. If you loose everything you will still benefit from the delay timer, unlike many other types of phase failure relays. This makes these units ideal for mains to generator changeoever systems where short supply interruptions are best ignored, thus eliminating false engine starts, further enhanced with a generator "run down" period on the return of a healthy supply.

phase failure relay with under voltage control with delay on & true delay off ywr2akptus (dpco)
PT100 Temperatuire Monitor Relays, YWR2TR7, NO VOLT SAFE LATCH.

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PT100 temperature relay, din rail mounted and DPCO output. The adjustable temperature sensing relay YWR2TR7 will monitor a PT100 sensing probe (preferably 3 wire, but 2 wire possible if terminals P2 & PC are linked together). The adjustable range is 0°C to 200°C the output relay will be energised when below the set level, indicated also by a red LED. When the sensed temperature exceeds the set level the relay will be de-energised accompanied by the red LED extinguishing, at which point the relay will be "latched off". In this latched condition the YWR2TR7 will not reset on a failing temperature and will not be reset by removing and re-applying the auxiliary supply. In order to reset the YWR2TR7 the auxiliary supply must be on, the PT100 cold, then the front reset button can be operated or the remote reset input activated to re-energise the relay. In normal "no fault" operation the relay will energise on the connection of the auxiliary supply.

PT100 Temperatuire Monitor Relay YWR2TR7 (DPCO)
Seal Monitor Relay, YWRWS,YWR2WS,PUMP SEAL RELAY,

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Din rail mounted units for the monitoring and alarming in applications where the presence of water is a problem. Such applications include water contamination of the oil within submersible pumps or water leak detection from pipes within buildings. Working on the conductive probe principle and with an adjustable sensitivity. In a situation healthy condition the output relay is energised, when the presence of water is detected, i.e. in the case of a pump, the seal fails and the oil becomes contaminated the resistance drops. If the resistance falls below the set level as set via the front potentiometer the output relay will de- energise and the red LED will extinguish. A green LED indicates the connection of the auxiliary supply.
PUMP SEAL LEAK MONITOR RELAY / WATER LEAK DETECTION RELAY YWRWS (spco) YWR2WS (dpco)
Voltage Control Relays, YWROUV, YWR20UV,YWROUV2, under over voltage relay,

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Din rail mounted AC self powered voltage control relays (no separate auxiliary supply required) for the combined monitoring of both over and under voltage levels. Available only in a din rail package with nominal voltages from 24VAC to 440VAC, an option adjustable time delay 0.1 to 10 sees "T" can be specified as a delay on tripping timer.

SELF POWERED AC VOLTAGE OVER & UNDER CONTROL RELAYS YWROUV (spco), YWR20UV (dpco)YWROUV2 (1 x spco over & 1 x spco under)
Voltage Control Relays,SELF POWERED DC VOLTAGE CONTROL RELAYS,YWRTU, 8WRTU, 11WRTU,YWR2TU, 8WR2TU, 11WR2TU

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Din rail mounted or 8/11 pin plug in DC self powered voltage control relays (no separate auxiliary supply required), available both SPCO and DPCO output. The output relay energises when the voltage rises above the set level controlled via a potentiometer adjustable -20% to +30% of the nominal voltage. The output relay will then de-energise when the voltage falls below the set level less a hysteresis adjustable via a second potentiometer 5 to 25% of the set level. If the total supply is lost de- energisation will also occur. A green LED indicates a voltage is present and a red LED indicates that the output relay is energised.

SELF POWERED DC VOLTAGE CONTROL RELAYS YWRTU, 8WRTU, 11WRTU (spco) YWR2TU, 8WR2TU, 11WR2TU (dpco)
Thermistor Monitor Relays, MOD-TC-2, MODTC2, MOD TC 2,

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An attractive modern designed thermistor relay in a din rail mounted modular style housing .The units are supply voltage selectable via the connection of different terminals. On the connection of the supply voltage the two LEDs illuminate green and the output relay will energise. Should the PTC sensor embedded within the motor windings resistance rise above 3.3 KOhms due to a rise in motor temperature the output relay will de-energise and one of the LEDs will illuminate orange. Once tripped the motor temperature would have to cool sufficiently for the resistance to drop below 1.8 KOhms to allow the output relay to re-energise again. The fixed tripping and reset values are industry recognised acceptable values.

Thermistor Monitor Relay MOD-TC-2 (DPCO)
Thermistor Monitor Relays,YRTC, 8RTC, 11RTC, KLIXON,

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Thermistor monitoring relays, available in either a din rail or 8 & 11 pin plug in housing SPCO (N/O in the din rail housing). The relays will monitor a series circuit of up to 6 thermistors having a total "healthy" resistance not exceeding 1500 Ohms, the output relay will be energised indicated also by a red LED. Should overheating occur the individual resistance of a thermistor will rapidly rise above 3.3 KOhms at which point the normally energised relay will de-energise, accompanied by the red LED extinguishing. In the event of a short circuit or auxiliary supply loss the unit will de-energise.

Thermistor Monitor Relay YRTC (SPNO) 8RTC 11RTC (SPCO)
Thermistor Monitor Relays, YWRTC, YWR2TC, KILON,

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Thermistor monitoring relays, available in either a din rail or 11 pin plug in housing SPCO with a DPCO option in the din rail housing. The relays will monitor a series circuit of up to 6 thermistors having a total "healthy" resistance not exceeding 1500 Ohms, the output relay/s will be energised indicated also by a red LED. Should overheating occur the individual resistance of a thermistor will rapidly rise above 3.3 KOhms at which point the normally energised relay/s will de-energise, accompanied by the red LED extinguishing. In non latched mode (the link between terminals Y1 & Y2 or pins 7 & 8 is left open) the relay/s will re-energise when the circuit resistance drops below 1.8 KOhms. In latch mode (the link between terminals Y1 & Y2 or pins 7 & 8 is closed) the unit can be reset when this closed link is opened, provided the circuit resistance is below 1.8 KOhms. In the event of a short circuit or auxiliary supply loss the unit will de-energise.

Thermistor Monitor Relay YWRTC (SPCO) YWR2TC (DPCO)
Thermistor Monitor Relays,NO VOLT SAFE LATCH. MANUAL & REMOTE RESET, MANUAL RESET, REMOTE RESET, YWR2TC7,

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Thermistor monitoring relay, din rail mounted and DPCO output. The relay will monitor a series circuit of up to 6 thermistors having a total "healthy" resistance not exceeding 1500 Ohms, the output relay will be energised indicated also by a red LED. Should overheating occur the individual resistance of a thermistor will rapidly rise above 3.3 KOhms at which point the normally energised relay will de-energise, accompanied by the red LED extinguishing, at which point the relay will be "latched off". In this latched condition the YWR2TC7 will not reset when the thermistor cools down and will not be reset by removing and re-applying the auxiliary supply. In order to reset the YWR2TC7 the auxiliary supply must be on, the thermistors cold, then the front reset button can be operated or the remote reset input activated to re- energise the relay. In normal "no fault" operation the relay will energise on the connection of the auxiliary supply.

THERMISTOR MONITORING RELAY WITH BUILT IN "NO VOLT SAFE LATCH" YWR2TC7 ( DPCO)
Current Relays, Signal Control Relays and Trip Amplifiers, Signal Control Relays & Trip Amplifiers, ywrit, 11writ, ywri2t, trip amps

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YWRIT - Din rail 1-20mA adjustable single setpoint trip amp. 11WRIT -11 pin plug in 1 -20mA adjustable single setpoint trip amp. YWRI2T - Din rail 1 -20mA two adjustable setpoint trip amp 2 x SPCO outputs "Low" & "High"

trip amps 1-20ma dc ywrit 11writ ywri2t
Underspeed Relay, underspeed relay,11rvl 8rvl, 11rvlmp, PULSE CONTINUITY relay,

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Simple 8 & 11 pin plug in underspeed relays suitable for all kinds of machinery to detect loss of speed and pulse continuity. These units are useful where an output contact is required to alarm on jamming, loss of speed due to blunt cutting tools or as a "stationary" contact to allow the release of machine guards. Applications also include being used as "watchdog" relays. 11RVL, 8RVL - The input is achieved from either a NAMUR proximity switch or from a clean contact. 11RVLMP - The input is achieved from either a NAMUR proximity switch, PNP sensor or from a clean contact. The 11RVLMP also benefits from a reset input by momentarily closing link S2 between pins 2 & 8. Note that the 8 second run up time will not be applicable and is only achieved by the connection and reconnection of the coil voltage.

UNDERSPEED OR PULSE CONTINUITY "WATCHDOG" RELAY 11RVL, 8RVL (spco) 11RVLMP (spco)
Underspeed Relay, PULSE CONTINUITY relay, underspeed relay, ywrvl, YWRVLS, YWRVLM, YWRVLL

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Din rail mounted underspeed relays suitable for all kinds of machinery to detect loss of speed and pulse continuity. These units are useful when an output contact is required to alarm on jamming, loss of speed due to blunt cutting tools or as a "stationary" contact to allow the release of machine guards. Applications also include being used as "watchdog" relays. The input is achieved from either a NAMUR proximity switch, PNP sensor or from a clean contact. The YWRVL also benefits from a reset input by momentarily closing link S2 between terminals Z1 & Z2.

UNDERSPEED OR PULSE CONTINUITY "WATCHDOG" RELAY ywrvl
Voltage Control Relays, 11WRU, YWRU, WRU, VOLTAGE, TRACTION,

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Voltage control relays suitable for both AC and DC voltage control, available in both din rail and 11 pin plug in. The standard units have three selectable via terminal taps voltage ranges from 0.1 to 400VDC (0.1 to 283VAC). Also available only in the din rail housing are dedicated range "high voltage" up to 1500VDC control units which are most suitable for "railway traction voltage" monitoring.

VOLTAGE CONTROL RELAYS YWRU 11WRU
Voltage Control Relays, VOLTAGE CONTROL RELAY, YWRU, YWRU T10, YWRUT10

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Voltage control relays suitable for both AC and DC voltage control, available for din rail mounting. The standard units have three selectable via terminal taps voltage ranges from 0.1 to 400VDC (0.1 to 283VAC). Also available are dedicated range “high voltage” control units which are most suitable for “railway traction voltage” monitoring.


Adjustable Time Delays - The YWRU.T10 voltage relays have 2 independently adjustable 0.1-10 secs time delays. There is a delay on rising voltage when the monitored voltage rises above the set level as selected by the front potentiometer and a delay on falling voltage, when the monitored voltage falls below the set level plus thehysteresis.

VOLTAGE CONTROL RELAYS, WITH DELAY ON TRIPPING YWRU.T10
Watchdog Relay, underspeed, PULSE CONTINUITY relay, ywrvl4

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Din rail mounted underspeed relays suitable for all kinds of machinery to detect loss of speed and pulse continuity. These units are useful when an output contact is required to alarm on jamming, loss of speed due to blunt cutting tools or as a "stationary" contact to allow the release of machine guards. Applications also include being used as "watchdog" relays. The input is achieved from either a NAMUR proximity switch, PNP sensor or from a clean contact. Unlike the unit type YWRVL the YWRVL4 does not energise for approximately 8 seconds on the initial connection of the coil voltage, but will energise when the first leading edge of an input is seen. Thereon the operation is "time based" an input will reset the time delay, if an input is not seen within the set time the output relay will de-energise but not latch. Therefore the unit will re-energise if a new leading edge of an input is seen. Removal of the coil voltage, failure of the sensor, or a breakage in the cable between the unit and the PLC or sensor will also cause the output relay to de-energise if in an energised state. Hence the underspeed monitor is fail safe.

Watchdog Relay ywrvl4