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卓爾瑞華（北京）科技有限公司
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卓爾瑞華（北京）科技有限公司
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產(chǎn)品型號TFS35
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更新時間：2016-08-06 00:51:40瀏覽次數(shù)：663次
聯(lián)系我時，請告知來自 環(huán)保在線WIKA TFS35雙金屬溫度開關(guān)Bimetal temperature switch熱電偶開關(guān)
| 表面直徑：100（mm） | 結(jié)構(gòu)型式：萬向型 | 加工定制：是 |
| 測量范圍：+60 °C ... +200 °C（℃） | 類型：WIKA TFS35雙金屬溫度開關(guān)Bimetal temperature switch熱電偶開關(guān) | 型號：TFS35 |
| 規(guī)格：Thermowell material | 精度等級：DIN EN 175301-803 | 品牌：WIKA/威卡 |
WIKA,TFS35雙金屬溫度開關(guān)Bimetal temperature switch熱電偶開關(guān)
Bimetal temperature switch
Model TFS35
Bimetal temperature switch, model TFS35
Applications
■ hydraulics
■ Machine building
■ Compressors
■ Motors
■ Cooling and heating circuits
Special features
■ Fixed switching temperature
■ Current-independent switching
■ Automatic reset
■ No additional voltage supply
■ Simple and fast mounting
Description
Temperature switches are generally used in industry for limiting temperature. They monitor the temperature of machinery and equipment and, for example, switch off
machinery if it overheats or switch on a fan to cool the equipment.
Function
Bimetals form the basis of the WIKA TFS35 temperature switches. Temperature sensing is carried out by a bimetal disc, which snaps over when the nominal switching temperature （NST） is reached.
On cooling back down to the reset switching temperature （RST）, the switch returns to its original state.
The bimetal disc in the model TFS35 bimetal temperature switch carrys no current, and this eliminates the possibility of arcing.
With current-carrying bimetal discs there is also a danger of premature switching as a result of higher self-heating.
The reset switching temperature is typically 15 ... 30 K below the switching temperature.
Contact design
The model TFS35 bimetal temperature switch can be delivered in two contact designs.
A Normally Closed （NC = closed in the normal state） opens a circuit and shuts down the machinery.
A Normally Open （NO = open in the normal state） closes a
circuit on reaching the switching temperature, in order that,for example, a fan or warning lamp can be switched on.
In both cases, on cooling down below the reset switching temperature, the contacts return to their original state, so that the monitored equipment can again work normally.
Max. switching voltage
Resistive load （cos ? = 1）:
■ AC 48 V, 3 A
■ DC 24 V, 3 A
■ DC 12 V, 4 A
Contact resistance
< 50 mΩ
Dielectric strength
AC 1,500 V, 50 Hz
between electrical connections and housing
Temperature ranges
■ Nominal Switching Temperature （NST）
50 ... 200 °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 in bimetal temperature switches is typically 15 ... 30 K below the switching temperature.
To ensure a safe reset of the switch at low switching temperatures, care must be taken that the temperature difference between the measuring point and ambient is
high enough; since otherwise the switch cannot cool back down to the reset switching temperature and thus the equipment will not be able to return to its normal state.
■ Ambient temperature
-50 ... +125 °C
Note:
With small insertion lengths there is a possibility that the temperature at the connector can reach impermissibly high values. This absoluy must be taken into account in the design of the measuring point.
Thermowell
Material
■ Brass
■ Stainless steel
Stem diameter D
■ 10 mm
■ Thread size （version without stem）
Process connection
Mounting thread:
■ G ½ B
■ G ¼ B
■ G ? B
■ M14 x 1.5
■ M22 x 1.5
■ ¼ NPT
Others on request
Insertion length U
■ 30 mm
■ 40 mm
■ 50 mm
■ Thread length （version without stem）
Others on request
Response time
The response time is srongly influenced by
■ the thermowell used （diameter, material）
■ the heat transfer from thermowell to the switching element
■ the flow-rate of the medium
Due to the design of the model TFS35 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 TFS35 bimetal temperature switch is very high.
Depending on the mounting situation, the medium, temperature and insertion length, the vibration resistance is up to 10 g.
Shock resistance
Up to 100 g, depending on the mounting situation, medium and temperature
Working pressure
Max. 100 bar, depending on the medium, temperature and thermowell design
Electrical connection
■ Rectangular connector per DIN EN 175301-803, Form A （replacement for DIN 43650）
■ Connector AMP Junior Power Timer, contacts gold-plated
■ FASTON blade terminals 6.3 x 0.8 mm
Other connections on request
Ingress protection
IP 65 when connected
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