Special thermocouple for temperature measurement in power stations

NegotiableUpdate on 08/20

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Nature of the Manufacturer: Producers

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Place of Origin

Online Consult

Overview

Product Introduction: With the continuous development of China's power industry, there is an urgent need for various thermocouples and thermistors suitable for temperature measurement in power stations to replace imported products. In order to catch up with the international advanced level and save foreign exchange for ******, our factory has successively introduced professional manufacturing from abroad ..

Product Details

With the continuous development of China's power industry, there is an urgent need for various thermocouples and thermistors suitable for temperature measurement in power stations to replace imported products. In order to catch up with the international advanced level and save foreign exchange for ******, our factory has successively introduced professional manufacturing technology and equipment from abroad. Based on the original products, we have widely listened to the opinions of design institutes and power station users, and referred to the EBASCO specifications in the United States to redesign the products, adding new varieties, so that the entire supporting series of varieties and specifications fully meet the supporting needs of domestic or imported 300000 and 600000 kilowatt generator sets as well as other domestic units, and meet the market with excellent quality.

Range specifications for thermocouples used for temperature measurement in power stations

category	model	graduation mark	Temperature measurement range ℃	accuracy class	Allowable deviation △ t
Nickel chromium nickel silicon	WRNT	K	0-800	I	± 1.5 ℃ or ± 0.004 ∣ t ∣
				II	± 2.5 ℃ or ± 0.0075 ∣ t ∣
Nickel chromium copper nickel	WRET	E	0-600	I	± 1.5 ℃ or ± 0.004 ∣ t ∣
				II	± 2.5 ℃ or ± 0.0075 ∣ t ∣
Copper Copper Nickel	WRCT	T	-40-350	I	± 0.5 ℃ or ± 0.004 ∣ t ∣
				II	± 1 ℃ or ± 0.75% t
platinum	WZPT	Pt100	-200-500	A-level	±(0.15+0.002∣t∣)
				Grade B	±(0.30+0.005∣t∣)
Copper resistance	WZCT	Cu50	-50-100	II	±(0.30+6.0X10-3t)

Note: "t" represents the measured temperature of the temperature sensing element, while for platinum and copper resistors, it is the ****** value of the measured temperature of the temperature sensing element.

Nominal pressure:

Generally refers to the static external pressure that the protective tube can withstand without breaking at room temperature, and the test pressure is generally 1.5 times the nominal pressure. In fact, the allowable working pressure is not only related to the material, diameter, and wall thickness of the protective tube, but also to its structural form, installation method, insertion depth, as well as the flow rate and type of the measured medium.

Insulation resistance of thermocouples for temperature measurement in power stations:

The test voltage for room temperature insulation resistance is 500V DC. The atmospheric conditions for measuring room temperature insulation resistance are: temperature 15-35 ℃, relative humidity 45%, and atmospheric pressure 86-106Kpa.

For thermocouples with a length exceeding 1 meter, the product of their insulation resistance at room temperature and their length shall not be less than 100 megaohms per meter,

Namely: Rr · L ≥ 100M Ω m L ＞ 1m

In the formula: Rr - the insulation resistance value of the thermocouple at room temperature, M Ω;

The length of the L-thermocouple, m。

For thermocouples with a length of 1 meter or less, their insulation resistance at room temperature should not be less than 100 M Ω.

Thermal resistance insulation resistance:

The test voltage for insulation resistance at room temperature can take any value from 10 to 100V DC, the ambient temperature should be within the range of 15 to 35 ℃, the relative humidity should not exceed 80%, and the insulation resistance value at room temperature should not be less than 100 M Ω