M31.06德國PTL漏電起痕試驗儀
德國PTL漏電起痕測試儀 M31.06漏電起痕試驗儀 供應進口漏電起痕測試儀適用于照明設備、
低壓電器、家用電器、機床電器、電機、電動工具、電子儀器、
電工儀表、信息技術設備的研究、生產和質檢部門，也適用于
絕緣材料、工程塑料、電氣連接件、輔件行業(yè)
PTL漏電起痕試驗是 IEC60112 ： 2003 《固體絕緣材料耐電痕化指數和相比電痕化指數的測定方法》， UL 746A 、 ASTM D 3638-92 、 DIN 53480 等標準規(guī)定的仿真試驗項目。
Tracking Resistance
It must be accepted that, in normal use, components made of insulating material may become moist and dirty. If the impurities are electrically conducting, current will flow be-tween parts of different voltage potentials - the tracking current. As a result, small flash-overs may occur, which cause thermal stresses to the surface of the insulating material.
The visual result of thermal decomposition of the insulating material caused by the tracking current is called the track. The interconnecting formation of carbonized material forms a tracking path, by which a lasting current conducting connection results. Thereafter the component cannot fulfill its intended electrical function in the majority of cases and parts may catch fire. The resistance of an insulating material to track formation is called the tracking resistance.
Test Method
The behaviour of the surface of solid insulating materials under the influence of tracking currents is to be determined as follows: The tracking currents are produced by allowing drops of an electrically conductive solution to fall centrally between two electrodes which are put on the sample and subjected to an alternating voltage.
The tests can answer the following questions:
· What highest voltage causes no breakdown up to 50 drops, while another voltage, 25 volts lower than the previously used voltage, causes no breakdown up to 100 drops? (Method CTI).
· Does no breakdown occur at a given voltage up to 50 drops each? (Method PTI).
Testing Apparatus
Platinum is specified as a material for the elec-trodes. The power supply unit is designed for voltages up to 600 V, resp. up to 1 000 V. An electronic control unit serves for releasing the drops.
In the case of the PTL tracking test apparatus, the electrode arrangement is mounted in a cabi-net with polycarbonate panes. By two wing doors, a good accessibility of the testing ar-rangement ensures a pleasant working. A safety system breaks the supply when the cabinet is opened.
Standard Outfit:
1 Pair of electrode holders, swivelling and adjustable in height, pressure force with inserted electrodes each 1 N, distance between electrodes adjustable,
1 Pair of Platinum Electrodes, with dimensions in accordance with IEC 60112, 30?chisel-edged at both ends, made of platinum, purity 99.9 %,
1 drop dispensing unit, adjustable in height, easy to dismantle, container cylinder of acrylic glass, jet nipple ?
1.0 mm, adjustable valve needle with electromagnet,
1 timer for the electromagnetic valve for an impulse every 30 seconds, impulse width adjustable for setting the drop size, with resettable counter for switching off the apparatus, with digital display for the testing time in minutes and seconds,
1 isolating transformer and variable ratio transformer for setting the testing voltage, output more than 600 VA,
voltage drop less than 10 %,
1 sample desk, precisely adjustable in height by a thumb wheel, with plate of glass,
1 adjustable resistor to limit the current to 1 A,
1 current indicating instrument 1.5 A, r.m.s., class 1.5, 1 voltage indicating instrument, true r.m.s., class 1.5,
1 excess-current relay 0.5 A, response time 2 s independent of current,
4 keys for operation mode SINGLE DROP, TESTING, OFF and ADJUSTING.
Design:
Housing papyrus white structure varnished, width 505 mm, depth 480 mm, height 740 mm, control unit in 19" rack system, testing cabinet with panes easy to replace, with safety switches, with green lamp "ready for operation" and red lamp "danger", all parts in the testing cabinet made of no corroding or corrosion protected materials, delivery including mains connection cord set, 2 safety keys, testing solution A, bag with NH4Cl, bag with Nekal BX dry, measuring cylinder 2 ml and gauge to adjust the distance between the electrodes to 4 mm and the dropping height to 35 mm, for connection to 230 V AC, 50...60 Hz,
Spare parts:
Platinum Electrodes, 1 pair, with dimensions in accordance with IEC 60112, 30chisel-
edged at both ends, made of platinum, purity 99.9 %, Article No.: M 31.81
Plate of glass for the sample desk: M 31.91
Jet Nipple of PTFE: M 31.92
Jet Nipple of stainless steel: M 31.93
Cap Nut of PTFE: M 31.96
Cap Nut of stainless steel: M 31.97
Valve Seat of PTFE: M 31.98
Cylinder of acrylic glass, Dia50 x 50: M 31.99
德國PTL公司成立于1946年,有著50多年的實驗檢測設備的生產經驗，是國際IEC電工委員會的實驗室檢測設備廠家。德國PTL公司的產品有：灼熱絲、漏電起痕試驗儀、耐劃痕測試儀、多檔可調的彈簧沖擊錘，試驗指、針、銷、球壓試驗裝置、滾筒跌落、IP1/8的防水試驗設備和防塵試驗設備等。目前中國大陸的已經在使用的實驗室有：上海、浙江、青島、廣州、深圳、上海電線電纜研究所等
