德国PTL漏电起痕测试仪 M31.06漏电起痕试验仪 供应进口漏电起痕测试仪适用于照明设备、
PTL漏电起痕试验是 IEC60112 ： 2003 《固体绝缘材料耐电痕化指数和相比电痕化指数的测定方法》， UL 746A 、 ASTM D 3638-92 、 DIN 53480 等标准规定的仿真试验项目。
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.
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).
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.
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.
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,
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德国PTL公司成立于1946年,有着50多年的实验检测设备的生产经验，是国际IEC电工委员会的实验室检测设备指定厂家。德国PTL公司的产品有：灼热丝、漏电起痕试验仪、耐划痕测试仪、多档可调的弹簧冲击锤，试验指、针、销、球压试验装置、滚筒跌落、IP1/8的防水试验设备和防尘试验设备等。目前中国大陆的已经在使用的实验室有：上海出入境检验检疫局、浙江出入境检验检疫局、青岛出入境检验检疫局、广州出入境检验检疫局、深圳出入境检验检疫局、上海电线电缆研究所等