590777

Gossen Metrawatt PROFITEST MXTRA Manual

44
Zoom out
Zoom in
Previous page
1/96
Next page
44 GMC-I Messtechnik GmbH
11 Measuring Insulation Resistance
Attention!
!
Testing Systems with RCDs
Insulation tests in electrical systems with type B RCDs may
only be conducted while the RCDs are switched off.
In the case of insulation testing, it’s advisable to discon-
nect AC/DC sensitive RCDs for safety reasons, because the
electronics required for detecting DC residual current
may be destroyed by these tests.
(Excerpt from ABB brochure 2CDC001003C0109).
11.1 General
Select Measuring Function
Connection
2 pole adapter or test
plug
Note
If you use the test plug together with a plug insert, insula-
tion resistance is only measured between the phase con-
ductor terminal designated “L” and protective conductor
terminal PE!
Note
Checking Measurement Cables Before Measurements
Before performing insulation measurement, the test
probes on the measurement cables should be short-cir-
cuited in order to assure that the instrument displays a
value of less than 1 k. In this way, incorrect connection
can be avoided and broken measurement cables can be
detected.
Set Parameters
* Freely adjustable voltage (see section 5.7)
Polarity Selection
* AUTO parameter (see section 5.8)
Breakdown current for Ramp Function
Limit values for Breakdown Voltage
Limit Values for Constant Test Voltage
q Test voltage
A test voltage which deviates from nominal voltage, and is usually
lower, can be selected for measurements at sensitive compo-
nents, as well as systems with voltage limiting devices.
q Voltage Type
The “U
ISO
” rising test voltage function (ramp function) is used to
detect weak points in the insulation, as well as to determine
response voltage for voltage limiting components. After briefly
pressing the ON/START key, test voltage is continuously increased
until specified nominal voltage U
N
is reached. U is the voltage
which is measured at the test probes during and after testing. This
voltage drops to a value of less than 10 V after measurement (see
section entitled “Discharging the Device Under Test”).
Insulation measurement with rising test voltage is ended:
• As soon as specified maximum test voltage U
N
is reached and
the measured value is stable
or
• As soon as specified maximum test voltage is reached, e.g.
after sparkover occurs at breakdown voltage).
Specified maximum test voltage U
N
or any occurring triggering or
breakdown voltage is displayed for U
ISO
.
The constant test voltage function offers two options:
R
ISO
Voltage type: constant
Test voltage:
50 V / 100 V / 250 V / 500 V / 1000 V / xxx V*
Voltage type: rising/ramp
Earth leakage resistance:
2-pole meas. (relevant for report generating only):
Measurements between
Lx-PE / N-PE / L+N-PE / Lx-N / Lx-Ly / AUTO*
where x, y = 1, 2, 3
Limit value:
I > I
Limit
U
INS
STOP
low limit:
U
INS
input range:
> 40V ... < 999 V
upper limit:
Limit value:
R
INS
< Limit Value
U
L
R
L
U
INS
… 44 …


Need help? Post your question in this forum.

Forumrules


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:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Gossen Metrawatt PROFITEST MXTRA at:


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 Gossen Metrawatt PROFITEST MXTRA in the language / languages: English as an attachment in your email.

The manual is 2,28 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.

Others manual(s) of Gossen Metrawatt PROFITEST MXTRA

Gossen Metrawatt PROFITEST MXTRA User Manual - Dutch - 92 pages


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