威卡小型溫度開關(guān)TFS135 德國wika代理
TFS135溫度開關(guān)技術(shù)參數(shù)
The maximum switching output depends on the mounted connector.
Resistive load (cos ? = 1):
■ Rectangular connector DIN EN 175301-803
AC 120 V / 60 Hz / 5 A
AC 250 V / 50 Hz / 2.5 A
■ Circular connector M12 x 1
AC 120 V / 60 Hz / 1 A
AC 250 V / 50 Hz / 1 A
Contact resistance：< 50 mΩ
Dielectric strength：AC 1,500 V, 50 Hz
between electrical connections and case
Temperature ranges
■ Nominal Switching Temperature (NST)50 ... 130 °C
Note:
The nominal switching temperature can be selected in steps of 5 K. It is preset on delivery and cannot be changed.
■ Switch point accuracy：±5 K
■ Reset Switching Temperature (RST)
The reset switching temperature for bimetal temperature switches is typically 15 ... 30 K below the switching temperature.
To ensure a safe reset of the switch, care must be taken that the temperature difference between the measuring point and environment is high enough; since otherwise the switch cannot cool back down to the reset switching temperature and thus the instrument will not be able to return to its normal state.
Ambient temperature
Rectangular connector EN 175301-803: -30 ... +85 °C
Circular connector M12 x 1: -25 ... +55 °C
Note:
Due to short installation length there is a risk that the temperature at the connector will rise up to an inadmissibly high value. This absolutely must be taken into account when designing the measuring point. The temperature at the connector must not exceed the above mentioned temperature range。
Extended temperature control
In addition to the standard design with one switching contact the TFS135 is available with a second normally closed contact or with a measuring element Pt1000 / Pt100 for extended temperature control applications.
Note:A second switching contact or measuring element is only permitted with a circular connector M12 x 1.
Thermowell Material
■ Brass
■ Stainless steel
Stem diameter F1：10 mm
Version with 2 switching contacts: 12 mm
Process connection Mounting thread:
■ G ½ B
■ G ¼ B 1)
■ G ½ A, ISO 1179-2
■ M14 x 1.5, ISO 9974-2 1)
■ ½ NPT
■ ¼ NPT 1)
Insertion length U1
■ 25 mm
■ 30 mm
■ 35 mm
■ 40 mm
■ 50 mm
■ 80 mm
■ 100 mm
Response time
The response time is strongly influenced by
■ the thermowell used (diameter, material)
■ the heat transfer from thermowell to switching element 
■ the flow rate of the medium
Due to the design of the model TFS135 bimetal temperature switch, there is optimum heat transfer from the medium to the switching element.
Vibration resistance
Due to the specific assembly of the switching elements used, the vibration resistance of the model TFS135 bimetal temperature switch is very high.
Depending on the mounting situation, medium, temperature ａnd insertion length, the vibration resistance can be up to 10 g.
Shock resistance
Up to 100 g, depending on the mounting situation, medium ａnd temperature Operating pressure The TFS135 is designed for an operating pressure up to max. 50 bar.
Electrical connection
■ Rectangular connector per DIN EN 175301-803, form A
(replacement for DIN 43650)
■ Circular connector M12 x 1
■ Circular connector M12 x 1 with neck tube 45 mm
Ingress protection ：IP65 in connection with a suitable mating connector