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| 西門(mén)子QRA51M系列火焰探測(cè)器-電眼 |
| QRA51M系列火焰探測(cè)器-電眼
品牌：SIEMENS（西門(mén)子）
產(chǎn)地：德國(guó) |
| 產(chǎn)品介紹 |
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The flame detectors are used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving. High sensitivity.
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With this type of flame supervision, the UV radiation emitted by gas or oil flames is used to generate the flame signal.
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The radiation detector consists of a UV-sensitive cell with 2 electrodes, which ignite when illuminated with radiation in the 190...270 nm range of the spectrum, thereby triggering a current in the flame detector circuit.
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The UV cell does not respond to glowing firebrick in the combustion chamber, daylight or light from the boiler room illumination.
The dust- and splashwater-proof housing of this flame detector has a fanged-on robust light metal tube with a radiation entry window for lateral viewing. A cylindrical slotted shutter rotates in the tube which interrupts the incidence of UV radiation to the UV cell mounted directly behind the radiation entry window at the rate of about 3 times per second (continuous testing of the cell’s striking and quenching performance).
The outer tube can be rotated through 180° by loosening 2 locking screws. A special clamping flange is supplied with the flame detector to ensure its vibration- and turning-proof fixing to the burner. | |
| 技術(shù)參數(shù) |
| 主要參數(shù) |
| UV單元平均壽命 |
10000小時(shí)（在50ºC） |
| 爐膛背壓 |
500mbar最大 |
| 保護(hù)等級(jí) |
IP40 |
| 重量 |
750g | | |
| 環(huán)境條件 |
| 運(yùn)輸環(huán)境 |
IEC 60 721-3-2 |
| 內(nèi)部條件 |
class 2K2 |
| 機(jī)械條件 |
class 2M2 |
| 溫度范圍 |
-55...+50ºC |
| 濕度 |
<95% |
| 運(yùn)行環(huán)境 |
IEC 60 721-3-3 |
| 內(nèi)部條件 |
class 3K5 |
| 機(jī)械條件 |
class 3M2 |
| 溫度范圍 |
-20...+50ºC |
| 濕度 |
<95% |
| 不得進(jìn)水 | | | |
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