Manual Benning ST 725 (page 44 of 71) (English, German, French)

577356

Zoom out

Zoom in

1/71

01/ 2015

BENNING ST 725



- Otherwise, the measurement of the protective conductor resistance (R

) will be started with

automatic polarity reversal and the highest measured value of both measurements will be

shown on the display.

- After the R

test has been passed, the test of the protective conductor current I

LEAK

will be

carried out as permanent measurement for max. 30 seconds. Press the -key

to finish

early the measurement.

- If the protective conductor current is lower than the admissible limiting value, a will be

shown next to the I

LEAK

symbol.

- The overall test is considered to be passed, if "PASS" is shown on the display.

- When pressing the -key

without previously connecting the measuring adapter to the

BENNING ST 725, the following warning will be shown on the display:

Seegure7b: Testingofthree-phaseappliancesbymeansofactivemeasuringadapters(test

object placed on insulated surface)

Note:

- The protective conductor current measurement is carried out using a current transformer

in the protective conductor of the measuring adapter (044140 or 044141) and by means of

the direct measurement method. The test object must be placed onto an insulated surface.

No part of the test object must have a connection to the earth potential. Otherwise, leakage

currents to earth might influence the measuring result.

- If it is not possible to place the test object onto an insulated surface, the protective conductor

current measurement can be carried out alternatively by means of the differential current

measurement method using the BENNING CM 9 leakage current clamp (044065). For this,

the test object must be put into operation by means of the optional measuring adapters

(044127 or 044128) and all active conductors (L1, L2, L3 and N) must be clamped by means

of the leakage current clamp. The BENNING CM 9 measures the protective conductor

current by means of the differential current measurement method.

9.5 Testing of 30 mA RCDs

The BENNING ST 725 allows measuring the tripping time of permanently installed RCDs and of

portable RCDs (PRCDs) with a nominal fault current of 30 mA. In the automatic test sequence,

thetrippingtimeoftheone-foldnominalfaultcurrent(initialpolarityof0°/180°)andoftheve-

fold nominal fault current (initial polarity of 0°/ 180°) is measured.

By generating a fault current of 30 mA, it is proven that the RCD will trip when the nominal fault

current is reached. If the limiting value of the maximum contact voltage of 50 V is exceeded, the

"UB > 50 V" symbol will be shown on the display and the testing will be stopped.

Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

You will receive an email to register for one or both of the options.

Get your user manual by e-mail

Enter your email address to receive the manual of Benning ST 725 in the language / languages: English, German, French as an attachment in your email.

The manual is 10,68 mb in size.

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.

Info

Benning ST 725 Manual

Product: