Method of testing

PD Surge / HVAC

Highlights

determining the inception and extinction voltage according to IEC 61934
very high reproducibility owing to special filter technology
special coupling technology for measuring completely assembled motors
extremely free of any disturbances due to special high-frequent filter technology
no shielding of the test area necessary
partial discharge test up to 25KV
qualification of enameled copper wire (twisted pair), enamel-insulation, impregnation procedure

General information

The partial discharge test serves for checking the winding quality of winding goods. The test can be performed in combination with the high-voltage test (sine) as well as with the surge test. The main aspect is detecting any quality faults at windings that cannot be detected by the conventional high-voltage test or surge test.

Owing to the coupling technology combined with a high-frequent filter technology the system is extremely free of any disturbances. Thus it can be very well used directly on-site or in the production.

Assembly and connections

The partial discharge measuring (filtering and analysis) is completely integrated in the MTC2. Only the uncoupling (measuring) of the actual partial discharge signal is performed outside the tester. This is necessary for an ideal adaption to the respective measuring situation. The test at an open stator winding or at a completely assembled motor is no problem for the MTC2.

The partial discharge measuring at an open stator winding is performed via a high-sensitive antenna which is put inside the test object or in its direct surrounding.

The measuring at a completely assembled motor cannot be performed via an antenna as the high-frequent signals are shielded by the closed motor cabinet. In these cases the measuring is performed via a special coupler which is grinded in the measuring lead.

The antenna as well as the coupler can be optionally connected to the MTC2. Thus you are well equipped for every test application.

The combination of these two measuring methods for a partial discharge test in one tester is unique on the market.

Partial discharge test at HV-AC

The test is performed fully-automatically via a previously set test sequence. A ramp function is run in which the test voltage is continuously increased. As soon as the first partial discharges occur this voltage is stored as PDIV (inception voltage).

Now the voltage is reduced again until the partial discharge completely disappears. This point is detected as PDEV (extinction voltage) and also stored. Due to preferably short test times in the production the intensity of the partial discharges can also be determined at a preset voltage. Thus it can be distinguished between "GO" and "NO GO" within milliseconds.

In addition it is also possible to perform the test manually. Here the operator continuously increases the voltage while monitoring the partial discharge signal.

Partial discharge test at surge voltage

The test is performed either manually or automatically. In the manual mode the operator increases the voltage continuously while monitoring the partial discharge signal.

Via a test sequence the automatic operation fully-automatically provides an analysis of all three phases. The following values are determined per phase: PDIV (inception voltage), PDEV (extinction voltage), RPDIV (repeating inception voltage), and RPDEV (repeating extinction voltage).

Here it is also necessary to run the complete ramp. If it has to be distinguished quickly between GO and NO GO in the production it can be operated with a preset test voltage.

All results are automatically stored and protocolled.

Which testers does SCHLEICH supply?

single testers
combination testers (combination with further test methods)
high-voltage test AC with additional PD-test
surge test with additional PD test
testers in various price categories

Request detailed information - The SCHLEICH test methods Fibel

Fields with * are mandatory.

Company*

Name*

Street and house number

Country

ZIP Code / City

Phone*

E-mail*

Subscribe to Newsletter? Yes, I want to receive the SCHLEICH newsletter.

Data protection By submitting this form you accept our .

Data Privacy Statement

Data Protection

The operators of this website take the protection of your personal data very seriously. We treat your personal data confidentially and according to the legal data protection regulations and this Privacy Policy.

The use of our website is usually possible without providing personal data. Personal data, such as names, addresses or e-mail addresses, are always provided on a voluntary basis if possible. Those data will not be passed on to third parties without your explicit permission.

However, we would like to point out that data transmissions via internet (e.g. e-mail communication) cannot be entirely secure and may have security vulnerabilities. A complete protection of personal details against unauthorised access by third parties is not possible.

Cookies

This website partially uses so-called cookies. Cookies do not cause damages to your computer and do not contain viruses. Cookies allow us to make our offer more user-friendly, more efficient and more secure. Cookies are small text files, stored by your browser on your computer.

The most cookies that we use are so-called “session cookies”. They will be deleted automatically after the end of your visit. Other cookies remain on your terminal device. Those cookies enable us to recognise your browser on your next visit.

You can adjust your browser that way in order to be informed when cookies are placed, to individually allow cookies or to generally exclude cookies in certain cases as well as to activate the automatic deletion of cookies when closing the browser. The deactivation of cookies may impair the functionality of this website.

Server-log-files

The provider of these websites automatically collects and stores information in so-called server log files which your browser automatically transmits to us, such as

browser type/version
used operating system
referrer URL
host name of the accessing computer
time of query

Those data cannot be associated with individual persons. A merging with other data sources does not take place. We reserve the right to retrospectively check the data if reasonable evidences concerning illegal use become known.

Contact form

If you send enquiries to us via the contact form, your data entered into the contact form, including the stated contact data, are stored for the purpose of dealing with your enquiry and in case of additional enquiries. Those data will not be passed on without your permission.

If you would like to receive the newsletter offered on our website, we require your email address as well as information which allow us to check that you are the owner of the provided email address and that you agree to the reception of the newsletter. Further data will not be collected. We use those data exclusively for the sending of the requested information and do not transmit them to third parties.

The given permission to the storage of the data, the email address as well as the use of such for the purpose of sending the newsletter can be withdrawn at any time via the "Unsubscribe"-link within the newsletter.

Privacy Policy for the use of Google Analytics

This website uses Google Analytics, a website analysis service by Google Inc., 1600 Amphitheatre Parkway Mountain View, CA 94043, USA.

Google Analytics uses so-called "cookies", text files that are stored on your computer to analyse your use of the website. The information generated by the cookie about your use of this website is usually sent to and stored at a Google server in the U.S.A.

You find more information concerning the treatment of user data by Google Analytics in Google's Privacy Policy: https://support.google.com/analytics/answer/6004245?hl=de

Browser Plugin

You may prevent the installation of cookies by adjusting the settings of your browser; however, if you do so, you may be unable to use all features of this website. Further, you may prevent the collection of data generated by cookies (including your IP address) and related to the use of this websites as well as the processing of such data by Google by downloading and installing the plug-in under the following link: http://tools.google.com/dlpage/gaoptout?hl=en

Objection to Data Collection

You may prevent the collection of data by Google Analytics by clicking the following link. Doing so, an Opt-Out-Cookie will be placed which prevents future data collection when visiting our website: Disable Google Analytics

IP-anonymisation

We us the function "Activate IP-Anonymisation". Through this, your IP-address will be shortened priory within the member states of the European Union or other contractual states of the Treaty on the European Economic Area. Only in exceptional cases your complete IP-address will be transmitted to a server in the U.S.A. and shortened there. Commissioned by the operators of this website, Google will use this information to evaluate your use of the website, to compile reports on website activities for website operators and to provide other services related to website and internet activities. Google will not merged your IP address with any other data held by Google.

Privacy Policy for the use of Google Web Fonts

For the homogenous display of fonts, this website uses so-called web fonts that are provided by Google. On retrieving a website your browser downloads the necessary web fonts to your browser cache in order to correctly display texts and fonts. If your browser does not support web fonts, your computer uses a standard font.

For further information, please see https://developers.google.com/fonts/faq as well as Google's Privacy Policy: https://www.google.com/policies/privacy/

Privacy Policy for the use of Google Maps

This website uses the map service Google Maps via API. This service is provided by Google Inc., 1600 Amphitheatre Parkway Mountain View, CA 94043, USA. To use the functions of Google Maps it is required to store your IP address. This information will usually be transferred to and stored on a server in the USA. The provider of this website has no influence on this data transmission.

For further information, please see Google's Privacy Policy: https://www.google.de/intl/de/policies/privacy/

Right to Information, Deletion, Blocking

You have the right to be informed about your person-related data, their origin and addressee and the purpose of data processing as well as the right to correction, blocking or deletion of those data at any time and free of charge. For further questions and questions concerning person-related data, feel free to contact us under the address published in the impressum/legal notice.

Objection to commercial mails

Providers are obligated to publish contact information in the Legal Note/Impressum. The use of such contact information by third parties for the purpose of distributing unsolicited advertisements or other commercial information is prohibited. The operators of this website reserve the right to take legal measures in case of being sent unsolicited commercial information, e.g. spam mails etc.