Table of Contents
Advertisement
Electrical connection
7.1.2
Current sensor X3 (Toroid) for current scaling
7-4
For cable type and maximum cable length, please refer to the cable table, Section 5.
The KSR sensor (weld current sensor) must be installed in the monitoring device.
As the actual installation is concerned, remember that improper placement of the KSR
sensor may lead to measuring faults.
In order to keep these faults as small as possible, the following cautions must be ob-
served:
-
The current carrying conductors must be run through the KSR sensor as straight
and as centrally oriented as possible. The sensor should be mounted as far away
from current carrying bus bars and high current carrying conductors as possible in
order to prevent noise effects of external fields.
-
No metal parts that can be magnetized should be used to mount the KSR sensor.
Copper and brass are to be preferred.
-
To be able to assess possible measuring fault, calibration measurements (scal-
ings) should be made in each case, using a suitable welding current meter.
-
The maximum cable length between the KSR sensor and the PSI 6XXX.350 L1 is
100 meters. This limit must not be exceeded.
-
The connection between the KSR sensor and the PSI 6XXX.350 L1 consists of a
shielded cable. The shield must be connected to X3/3 of the PSI 6XXX.350 L1.
The shield at the sensor end is left unconnected.
The KSR cable value (ohmic resistance of KSR sensor, cable and connector) can be
measured by a measuring circuit test during the last half-wave of [SQZ] (Basic Setup -
Sequence Setup in the BOS-5000).
The measuring circuit test is evaluated for the following events:
-
ohmic resistance less than 7 W
-
ohmic resistance between 12 and 950 W
-
ohmic resistance higher than 1100 W
Measuring circuit values in the intermediate ranges lead to an ambiguous evaluation of
the measurement.
In the use of KSR sensors with robots or similar devices, certain cable segments are sub-
ject to severe mechanical stress. This must be kept in mind when selecting the cables
and the design of the cable connection.
PSI 6XXX.350 L1
=
Measuring circuit shorted,
Measuring circuit o.k.,
=
=
Measuring circuit open.
1070 080 067-101 (2001.03) GB
Advertisement
Table of Contents
