Usměrňovačové systémy DC-Měniče Střídače UPS systémy ...
Poznámky redaktora
O ividual steps:
- Visual inspection
- Protective conductor test (if the protective conductor exists)
- Insulation measurement (if technically possible)
- Measurement leakage current, protective conductor current and contact current
- Moreover: safe isolation; proof further protective measures; inscriptions; functional test;
analysis, evaluation and documentation
If not directly possible isolate the test sample from the electrical systems, proceed follows:
- visual inspection
- protective conductor resistance measurement for devices protection class and
- contact current measurement accessible protective parts devices protection class II
as well accessible parts devices protection class which are not connected the
protective conductor!
T resp ective tep and easuring depend test
sam ple!A
- There must not any signs overload improper use;
- not allowed make any improper interventions and modifications;
- Any contamination and corrosion affecting safety must removed cleaning. according DIN VDE
0751, the specified measuring arrangement "MD" (DIN VDE 0751-1) connected the same jack
("Sonde Probe").
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. necessary, markings have corrected after modi
fications.g. The order the individual measurements (tests) has be
observed absolutely, because the measurement has stopped immediately case failed
test.
At the beginning test (after requesting the corresponding VDE regulation and protection class),
the "Visual Inspection" menu appears the display. The additional test
sockets "L/N" are only connected 'Test Socket" mode. Another connection test will only started
when the "Visual Inspection" menu has been passed through once again. Moreover, has determined
which protection class (protective measure) the test sample corresponds and which tests mea
surements (VDE regulation, manufacturer's accompanying documents, depending the type of
the test sample) have carried out.
- Mains connection cables (also enclosed device connecting cables) must not show any external
defects between the connecting point the device and the connecting point the mains;
- Strain relief and bending protection (if applicable) the mains connection cable must firmly
attached and efficient;
C ctio test
For the first test measurement, the tester starts connection test determine, whether dangerous
contact voltage applied, whether test sample connected and that there short-circuit. Measurement made with testing current +/- 200mA according DIN VDE 0701
0702, VDE 0751-1 testing current 10A (formerly: DIN VDE 0701 T260).
A Attention! Pressing the se> button will stop the measurement. according DIN VDE 0701-0702.
E xam les licatio visu ctio are:
- Melt inserts fuses must comply with the parameters requested the manufacturer (e. During the pause,
the test socket will remain live!
10.
For measuring device leakage current for the patient leakage current etc. After
a positive connection test, the measurement started. Confirm with continue with the test!
The tester provided with switchable test socket contact the test sample. For measurements earth (test samples protection
classes II) and for direct measurement the leakage current, measuring shunt the milliohm
range integrated into the cable for connection. Only after troubleshooting, the test can repeated right from the beginning.
open switch), information message displayed.
F reason, tely ece ssary res elect rre regulation
fo easu rem tests!A
V isu inspection
Important parts the device contributing its safety must neither visibly damaged nor obvi
ously inappropriate for the device. For measuring,
the test cable (probe) connected accessible metal parts the test sample and the earthing
contact the mains plug means the alligator clip.
nominal current intensity and fusing characteristics);
- Air filters (if requested) must built in;
- Cooling apertures must not blocked;
- Protective covers requested the manufacturer must used and must attached proper
condition and due form;
- Cooling fins must not blocked;
- The markings provided the manufacturer, particularly those contributing safety (warning
symbols, characteristic data fuse holders, switch positions isolator switches and similar),
must available and perfectly legible. This particularly applies insulation and insulating parts which
are accessible during repair, modification test well for housings devices with protective
insulation (protection class II). Connect the mains plug the "test socket"
of the appliance tester. arry anu eas rem Tests
First all, each test begins with inspection the test object. Due correspondingly required measuring
arrangement, the "Sonde Probe" jack intended for measuring testing the absence voltage or
the contact current etc. The "PE" test socket firmly connected
with the earthing contact the test socket.1 ctive Test ctive esistan ce) pe
This function intended measure the protective conductor resistance RPE(devices protection
class I). necessary, use the measuring jacks "PE" and "L/N" which are connected
in parallel the "test socket". case negative connection test (e.BENNING BENNING 750 A
10.g
