Protezioni termiche per termostato ad azione strisciante

Un termostato/protettore termico a scatto con il più alto potere di contatto tra tutti i nostri controlli. Adatto per l'uso su 120/240 Carichi VCA. Disponibile con varietà di elementi bimetallici per migliorare le caratteristiche prestazionali. La scelta dei protettori termici ad azione strisciante richiede un'analisi delle specifiche del palo e del lancio, temperatura impostata, isteresi, corrente nominale massima, tensione CA massima, tensione CC massima nominale, e cambiare vita.

Protezioni termiche per termostato ad azione strisciante

Termostato bimetallico ad azione lenta a bassa tensione

Creep Action Thermal Protector, Motor Protector

Pole-and-throw specifications
Singolo palo, tiro singolo (SPST) switches make or break the connection of a single conductor in a single branch circuit. They have two terminals and are commonly referred to as “single pole” switches.
Singolo palo, double throw (SPDT) switches make or break the connection of a single conductor with either of two other single conductors. Often called “three-way switches,” SPDT devices have three terminals and are used in pairs.
Double pole, tiro singolo (DPST) switches make or break the connection of two circuit conductors in a single branch circuit and usually have four terminals.
Double pole, double throw (DPDT) switches make or break the connection of two conductors in two separate circuits. Most DPDT switches have six terminals and are available in either momentary or maintained contact versions.

Creep-Action Thermal Protectors with more than two poles are designed to split loads into separate circuits.

Creep-Action Thermal Protectors Set-point Temperature
Creep-Action Thermal Protectors Specification Guide Thermal switches and thermal protectors have a set point temperature that is either fixed or field adjustable. Il set point è la temperatura nominale alla quale il dispositivo subisce un cambiamento nello stato associato al movimento dei contatti elettrici. I dispositivi a punto fisso sono classificati a una determinata temperatura mentre i dispositivi adattabili al campo hanno un intervallo di temperatura su cui il set point può essere regolato.

Creep-Action Thermal Protectors Hysteresis
Isteresi, indicato anche come differenziale di temperatura, è un intervallo di temperatura finita su cui avviene la commutazione. È progettato per impedire ai circuiti di cambiare costantemente tra gli stati. Un'isteresi di 0.5 C ti in genere azionario 0.5 gradi oltre la temperatura del set-point e non cambia nuovamente lo stato fino a quando la temperatura scende a 0,5 ° C al di sotto della temperatura set-point.

Temperatura ambiente: The normal or typical temperature of the environment surrounding the device.

Ripristino automatico: A thermostat that automatically resets to its pre-trip contact configuration at a factory preset temperature.

Bimetallico: Two metals with different rates of expansion molecularly bonded together to form a blade or disc for a thermostat.

Creep Action Thermostat: A thermostat with a bimetal blade that slowly makes the contacts or slowly breaks the contacts.

Current Derating: Term used to describe a predictable condition where increased current applied to a thermostat causes the device to open at a temperature below its set point. This condition is present only in Normally Closed bimetal thermostats that are both current and temperature sensitive.

Functioning Temperature: (TF of Tf) In reference to a thermal cutoff, as defined by IEC Standards, the temperature at which a Thermal Cutoff opens a circuit under a no load condition. The IEC tolerance is +0 C, -10 C.

Holding Temperature: (TH or Th) In reference to a thermal cutoff, the maximum temperature that a Thermal Cutoff can maintain Rated Current for a period of 168 hours with functioning.

Maximum Temperature: (TM or Tm) In reference to a thermal cutoff, the maximum temperature to which the device can be subjected for a period of ten minutes without resuming conductivity once it has opened.

Minimum Differential: (also known as deadband) The minimum number of degrees between the actual open and actual close temperatures.

Motor Protector: A thermal protector that is sensitive to both increases in current and increases in temperature.

Normalmente chiuso (N.C.): Contacts open on temperature rise.

Normalmente aperto (N.O.): Contacts close on temperature rise.

One Shot: A device that, once activated at its preset temperature, cannot be reset. Available only in Normally Closed contact configuration.
Corrente nominale: The maximum allowable current that a device can carry.

Tensione nominale: The maximum voltage that should be applied to a device.

Self-Hold Protector: A device that, upon opening, will not reset until power is removed from its circuit regardless of ambient temperature. Available only in Normally Closed contact configuration.

Snap Action Thermostat: A thermostat with a Bimetal element that snaps to close the contacts when the activation condition is experienced. This construction permits the clean break of loads.

Interruzione termica: A thermal cutoff is an electrical safety device that interrupts electric current when heated to a specific temperature.

Thermal Cutoff Fuse: A device that melts its internal element to open a circuit in an over-temperature condition. Also known as a thermal fuse, thermal protector fuse or thermal switch.

Protettore termico: A Thermal Protector is a protective device built into a motor that provides over-current or over-temperature protection that disconnects power to the ballast if internal temperatures rise above the trip point. This protects motors from overheating. Types of switches include automatic rest, manual reset and resistance temperature detectors.

Tolleranza: The allowable range above and below a nominal temperature.