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Vaisala 公司推出了一項(xiàng)獨(dú)特的創(chuàng)新方案，實(shí)現(xiàn)對(duì)高壓設(shè)備中 SF6 絕緣性能的在線(xiàn)監(jiān)控。Vaisala 公司的DPT145濕度密度多參數(shù)變送器結(jié)合了在線(xiàn)露點(diǎn)監(jiān)控和壓力檢測(cè)功能，堪稱(chēng)連續(xù)實(shí)時(shí)評(píng)估 SF6 絕緣性能的理想工具。

很多開(kāi)關(guān)和斷路器等電力傳輸和配電設(shè)備使用六氟化硫（SF6）作為絕緣氣體，以防止關(guān)閉開(kāi)關(guān)時(shí)產(chǎn)生電弧，保護(hù)設(shè)備免出故障。Vaisala DPT145 的直接標(biāo)準(zhǔn)化壓力測(cè)試功能能夠立即發(fā)現(xiàn)任何漏電現(xiàn)象，而其在線(xiàn)露點(diǎn)檢測(cè)功能則能夠針對(duì)潮氣問(wèn)題提供早期警告。潮氣能夠影響絕緣氣體的絕緣性能并使故障機(jī)率快速升高。

Vaisala DPT145 是目前市場(chǎng)上唯一一種能夠在線(xiàn)同時(shí)監(jiān)控7種參數(shù)的電力傳送設(shè)備。該設(shè)備可以直接檢測(cè)露點(diǎn)、壓力和溫度，并計(jì)算濃度、標(biāo)準(zhǔn)化壓力、常壓下露點(diǎn)值和PPM值。

由于用一個(gè)設(shè)備即可監(jiān)控7種不同參數(shù)，線(xiàn)路系統(tǒng)所需的機(jī)械連接更少，漏電的可能性也更小了。因?yàn)橥顿Y更低，安裝成本更少，現(xiàn)場(chǎng)維護(hù)需求更少等原因，該設(shè)備可全面節(jié)省費(fèi)用，降低消耗。

更重要的是，其出色的長(zhǎng)期穩(wěn)定性保證了該設(shè)備能夠年復(fù)一年提供可靠的高質(zhì)量檢測(cè)服務(wù)，無(wú)須維護(hù)校對(duì)。另外，由于無(wú)須現(xiàn)場(chǎng)取樣檢測(cè)，所以 SF6 氣體不會(huì)泄露到空氣中，因此在線(xiàn)監(jiān)控方式也具環(huán)保效應(yīng)。

測(cè)量參數(shù)：露點(diǎn):-50...+30°C、壓力:0...10bar和溫度-40...+80°C

計(jì)算參數(shù)： SF6密度、標(biāo)準(zhǔn)壓力、常壓露點(diǎn)和ppm

技術(shù)參數(shù)

測(cè)量參數(shù)
	Dew point Pressure, absolute Temperature	-50 ... +30 °C (-58 ... +86 °F) 1 ... 10 bar (14.5 ... 145 psi) -40 ... +80 °C (-40 ... +176 °F)
	參數(shù)計(jì)算
	Pressure, normalized to 20 °C (68 °F)	1 ... 12 bar (14.5…174 psi)
	SF6 or SF6/N2 mixture density ppm moisture, by volume Dewpoint, converted to atmospheric pressure	0...100 kg/m3 40 ... 40 000 ppm -65 … +30 °C (-85 ... +86 °F)
	性能
	Dew point accuracy Dewpoint stability Pressure accuracy at 23 °C (73.4 °F) Pressure temperature dependence	±3 °C (±5.4 °F) typical drift < 2 °C (3.6 °F) /5 years ±0.4 %FS ±0.1 %FS/10 °C (18 °F)
	Pressure stability Temperature accuracy 0 ... 40 °C (+32 ... +104 °F) -40...80 °C (-40 ... +176 °F)	typical drift < 1 %FS /5 years ±0.5 °C (± 0.9 °F) ±1 °C (± 1.8 °F)
	Density accuracy (pure SF6, 1 ... 10 bara) 0 ... 40 °C (+32 ... +104 °F)	±1 %FS
	-40 ... +60 °C (-40 ... +140 °F) PPM accuracy, typical (5...1000 ppm, 7 bar)	±2.2 %FS ±( 7 ppm + 15% of reading)
	Sensor response time: Pressure response time Dew point response time* 63% [90%] at 20°C and 1 bar -50 -> -10 °C Tdf -10 -> -50 °C Tdf	< 1 s 5 s [ 10 s] 10 s [ 2.5 min]
	* system equilibrium related response time is typically longer
	操作環(huán)境
	Operating temperature of electronics Operating Pressure Relative humidity Measured gases	-40 … +60 °C (-40 ... +140 °F) 0 … 50 bar (0…725 psi) 0...100 % SF6, SF6/N2 mixture
	輸出
	Digital output Connector	RS-485, non-isolated, Vaisala protocol 4-pin M8
	其他
	Sensor Operating voltage	Vaisala MPS1 multiparameter sensor 15 ... 28 VDC
	20 ... 28 VDC in cold temperatures (-40 ... -20 °C (-40 ... -4 °F))
	Supply current, during normal measurement during self-diagnostics Housing material Housing classification	20 mA max. 300 mA pulsed AISI316L IP65 (NEMA4)
	Weather shield to be used for continuous outdoor installations
	Storage temperature range transmitter only shipment package Mechanical connection	-40 … +80 °C (-40 ... +176 °F) -20 … +80 °C (-4 ... +176 °F) DILO DN20, ABB Malmkvist, or Alstom G1/2” compatible connector
	Every connection is helium leak tested at the factory
	Dimensional drawings Weight (with DILO adapter)	See the document B211165EN-A 765 g (27.0 oz)
	Complies with EMC standard EN61326-1, Electrical equipment for measurement, control and laboratory use - EMC requirements;
	Industrial environment, Tested levels EN/IEC 61000-4-2, Electrostatic Discharge EN/IEC 61000-4-3, RF field immunity EN/IEC 61000-4-4, Electric Fast Transient EN/IEC 61000-4-5, Surge EN/IEC 61000-4-6, Conducted RF Immunity Mechanical vibration EN/IEC 60068-2-6, Fc Sinusoidial vibration

DPT145-datasheet-seasy.pdf

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DPT145六氟化硫用濕度密度多參數(shù)變送器

技術(shù)參數(shù)

測(cè)量參數(shù)

參數(shù)計(jì)算

性能

操作環(huán)境

輸出

其他