Buy siemens thermistor motor protection relay monitoring relay with spdt contacts, 230 v ac 3rn10101cm00 or other monitoring relays online from rs for. Ptc thermistors temperature sensors for motor protection. Furthermore, unlike rtds, the resistance of a thermistor decreases with. The monitoring relays are climateproof according to iec 6072. Touch protection iec en 60529 degrees of protection provided by enclosures monitoring relays are safe to touch in accordance with iec en 60529.
The sirius 3rn1 thermistor motor protection relay for ptc sensors is certified according to, adjustable for up to 3 sensors accessories sirius 3rn1 thermistor motor protection for ptc sensors, monostable relay outputs a 6 a24 v ac 2 a24 v dc 1010 siemens ic 10 a 2014 6 a120 v ac, o freely assignable, input for thermistor connection. Manual sirius 3rn2 thermistor motor protection relay. Thermistor motor protection relays measuring and monitoring. Partner for consulting, sales, training, service, support, spare parts covering the entire rage of siemens for industry. Automation technology industrial controls monitoring and control devices relays monitoring relays sirius 3rn2 thermistor motor protection feedback for the article with the entry id 109742080 personalization saves you typing.
Or you could use the thermistor to feed the base of a transistor, as the temperature rises, the resistance goes down, feeding more current into the transistor until it turns on. Siemens industry catalog automation technology industrial controls protection equipment sirius 3rn1 thermistor motor protection. Siemens matsushita, thermistor reaches a certain temperature known as the curie point, the resistance of the. The thermistor motor protection relay cmmss monitors the winding temperature and thus protects the motor from overheating, overload and insufficient cooling in accordance to the product standard iec 609478, control units for builtin thermal protection ptc for rotating electrical machines.
Siemens 3rn10221dw 00 thermistor motor protection relay, screw terminal, evaluation units for 2 sensor circuits, alarm and trip, 3 leds, 22. Thermistor motor protection relays operating principle and fields of application for thermistor motor protection relays the cm range of thermistor motor protection relays are used to control motors equipped with ptc temperature sensors. In the six decades that minco has been in business, we have established working relationships with thousands of customer engineering teams. Relay,monitor, thermistor relay 24 vacdc, 3rn series download datasheet. Using thermistors with the siemens s71200 sm1231 rtd signal module i had an interesting experience with a customer who was utilizing an s71200 system. View and download siemens 3rb12 instructions manual online. Siemens 3rn10101cb00 relay,monitor, thermistor relay. Siemens 3rn101bw10 thermistor motor protection relay, screw terminal, standard evaluation units, 2 leds, 22. The thermistor motor protection evaluation function is optionally available for the sirius. Ptc thermistor relay series pd 225 farnell element14. These sensors are incorporated in the motor windings, thus measuring the motor heat directly. Siemens sirius 3rw303rw40 soft starter manual inverter drive. Ptc thermistors were used as timers in the degaussing coil circuit of most crt displays. Siemens 3rn10101cb00 relay,monitor, thermistor relay 24.
This is a rough idea, you would need a few more components to make it work. Abb thermistor motor protection relays distributors valin. Practical tips for installation and using of thermistor motor. Practical tips for installation and using of thermistor. The plc used was an s71200 series cpu1214c with various io modules, including a sm1231 rtd input module which would be used to read four 4 pt100 rtds in the field. En 609478 lowvoltage switchgear and controlgear control units for builtin thermal. Discover all cad files of the relay for thermistor protection ptc category from suppliercertified catalogs solidworks, inventor, creo, catia, solid edge, autocad, revit and many more cad software but also as step, stl, iges, stl, dwg, dxf and more neutral cad formats. Sirius 3rn1 thermistor motor protection siemens ww. A degaussing circuit using a ptc thermistor is simple, reliable for its simplicity, and inexpensive. The figure 6 shows a typical connection of two thermistor protection relays, and their associated groups of thermistor sensors. Unlike rtds, the temperatureresistance characteristic of a thermistor is nonlinear, and cannot be characterized by a single coefficient.
The overload relay then performs the stall protection, and the 3rn1 thermistor motor protection device monitors the temperature of the motor windings. Reliable protection against overtemperature emt6 thermistor overload relays emt6 thermistor overload relays protect machines against overtemperature caused by heavy starting duties, braking, undervoltage, overvoltage, and high switching frequencies. Warning siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. The ptc temperature sensors are incorporated in the motor windings to measure the motor heating. However, this equation is fairly complex, and requires knowing a lot of variables that we dont have for this. The thermistor is designed to have a resistance of 2 kiloohms at 25 degree celsius and temperature coefficient of 4% per degree celsius will bring a reduction of 80 ohms per degree celsius change in temperature.
The yellow led signals the possibility to reset with blinking with a high frequency. Sirius 3rn2 thermistor motor protection relay the scalable. Sirius 3rn2 thermistor motor protection relay manual, 102016, a5e34244868002arsaa001 7 introduction 1 1. Thermistor motor protection relays for ptc thermistors. Thermistor motor protection relays cmmse 1 no contact relay output msea2b01 12.
A thermistor is similar to an rtd, but a semiconductor material is used instead of a metal. Siemens 3rn101bw10 thermistor motor protection relay. Monitoring relays 3rn1 thermistor motor protection for ptc sensors 764 siemens lv 1 2006 7 selection and ordering data thermistor motor protection relays for ptc thermistors type a ptcs monostable version with closedcircuit principle, triggers in the event of control supply voltage failure ptb01 atex approval, see catalog lv 1 t. Manual 3rs1 3rs2 temperature monitoring relays siemens. Manual sirius 3rn2 thermistor motor protection relay siemens. Automation technology industrial controls monitoring and control devices relays monitoring relays sirius 3rn2 thermistor motor protection. The cmmsx thermistor motor protection relays are used to monitor the temperature of motors equipped with ptc temperature sensors. Using thermistors with the siemens s71200 sm1231 rtd. Siemens 3rn10101cw 00 thermistor motor protection relay, screw terminal, standard evaluation units, 2 leds, 22. Additional information and notes on safety atex cmmss. Thermistor is special type of resistor, whose resistance varies more significantly with temperature than in standard resistors. In certain cases, overheating can occur without being detected by the thermal image in the circuit breakeroverload relay, for example in the case of heavy starting, operation with frequency converters or.
Siemens sirius relays aai, a powerflo technologies company. Thermistor motor protection relays provide decisive benefits in cases in which currentdependent protection using either a circuit breaker or an overload relay is not the perfect solution. Ptc thermistors temperature sensors for motor protection and. Thermistor motor protection relays cmmse 1 no contact relay. Thermistors are widely used as inrush current limiters, temperature sensors negative temperature coefficient or ntc type typically, selfresetting overcurrent protectors, and selfregulating heating elements positive. Thermistor motor protection relay is used to monitor the winding temperature of motors generators using ptc sensors and to protect them from abnormal overheating in accordance to the product standard iec 609478, control units for builtin thermal protection ptc for rotating electrical. Thermistor protection relay tpr is designed for mounting inside a control cubicle or motor control center mcc, usually on standard terminal rail. After the reset, the relay closes again thus triggering the motor contactor to restart the motor. As an already registered user simply enter your userame and password in the login page in the appropriate fields.
Sirius 3rn2 thermistor motor protection industry mall siemens. Thermistor motor protection relay compact evaluation unit 17. Sirius 3rn2 thermistor motor protection relay manual, 102016, a5e34244868002arsaa001 11 1. Technical data nominal response temperature 80 to 180 c in steps of 10, plus 145 and 155 c. Full protection conditional protection no protection. Thermistor motor protection relay compact evaluation unit, 17. When used in domestic areas, the device can cause radio interference. Thermistor motor protection relay k8aktspt monitor temperature rise through internal motor loss temperature, phase sequence, and phase loss monitoring with the din 22. Reliable protection against overtemperature emt6 thermistor.
This will have the same effect as a break in the circuit or a failure of the thermistor. Supply voltage part number 24 v ac 1svr 550 805 r 9300 110 v ac 1svr 550 800 r 9300. Bulletin 817s thermistor monitoring relays offer stateoftheart supplementary motor protective functions that you can easily add and apply to your motor control circuits. A thermistor is a solid state device and has larger sensitivity than does an rtd. The new sirius 3rn2 devices provide decisive benefits in cases in which currentdependent protection using either a circuit breaker or an overload relay is not the perfect solution. We are all known that a resistor is an electrical component that limits the amount of current flows through a circuit. Thermistor motor protection relays for ptc thermistors type a ptcs. Abb low voltage thermistor motor protection relays distributors the relays of the cmmsx. A thermistor used for the measurement of temperature is shown in the figure below. Siemens launched a new product generation of thermistor motor protection relays. Siemens industry catalog automation technology industrial controls monitoring and control devices relays monitoring relays sirius 3rn1 thermistor motor protection. The 7ug0 monitoring relays provide protection for machines, plants and systems. Siemens matsushita, available in a growing range of types as surface mount devices for automatic placement. The resistance of the ptc thermistor changes only slightly in longterm use.
Bulletin 817s thermistor monitoring relays offer stateoftheart supplementary motor protective functions that you can easily add. A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors. Siemens 3rn10221dw 00 thermistor motor protection relay. Thermistor probes thermistor protection relays provide additional motor protection and should be used to supplement a conventional current sensing overload relay. Ptc thermistor relay series pd 225 166 ul approval not applicable for cat nos.
Siemens 3rn10101cw 00 thermistor motor protection relay. Using thermistors with the siemens s71200 sm1231 rtd signal. Cmmss functionality video basic setup of thermistor motor protection standard operational state 1. Automation technology industrial controls safety technology safety relays sirius 3sk safety relays accessories. Thermistor temperature sensors solutions are innovative, practical and likely to include the integration of thermal, flex circuit, and sensor and instrument design. We can also use ptc thermistors as heater in automotive industry to provide additional heat inside cabin with diesel engine or to heat diesel in cold climatic conditions before. If products and components from other manufacturers are used, these must be recommended or approved by siemens. Siemens 3un21100af7 motor protection thermistor 3un21100af7. New generation of thermistor motor protection relays cm. Buy siemens thermistor motor protection relay monitoring relay with dpdt contacts, 24 v acdc 3rn10111bb00 or other monitoring relays online from rs.