Undervoltage/Overvoltage Monitoring; Self Test/Error Codes - Bender ISOMETER isoES425 Manual

Function
2.3.2

Undervoltage/overvoltage monitoring

To monitor the system voltage U
menu "AL" (chapter 4.4). The maximum undervoltage value is limited by the overvoltage value.
The RMS value of the system voltage U
the limit values "U˂" and "U˃", an alarm will be signalled. If the maximum permissible system voltage U
for the ISOMETER® is exceeded, an alarm message will be triggered even if the overvoltage limit value has
been deactivated. The alarm will be deleted when the limit values plus hysteresis (chapter 4.4.1) are no longer
violated.
2.3.3

Self test/error codes

The self test checks the function of the ISOMETER®, and monitors the connection to earth as well as the
connection to the system to be monitored. The alarm relays do not switch during an automatically started self
test. For a self test started manually, the switching of the alarm relays can be set using the parameter "test" in
the alarm assignment (menu "out", chapter 4.5.2). During the test, the display indicates "tES".
When malfunctions are detected or connections are missing, the LEDs "ON"/"AL1"/"AL2" flash. The display
shows the respective error codes ("E.xx"), and in the factory setting relay "K2" switches. The relays can be
assigned to a device error with the parameter "Err" in the "out" menu in the alarm assignment.
2.3.3.1 Error codes
In the event of a device error the display shows the respective error code.
Overview of some error codes
Error code
PE connection error
The connection of "E" or "KE" to earth is interrupted.
E.01
Action: Check connection, eliminate error. The error code will be erased automatically once the
error has been eliminated.
System connection error
The internal resistance of the system is too high or the connection of "L1/+" or "L2/–" to the system
E.02 is interrupted. The terminals "L1/+" and "L2/–" are connected incorrectly.
Action: Check connection, eliminate error. The error code will be erased automatically once the
error has been eliminated.
Measurement error
Due to system interferences or a device error, the insulation measured value is no longer updated.
Prewarning and alarm are set for the insulation measured value at the same time.
E.05
Calibration invalid after software update
"E.05" appears together with "E.08": The software is not compatible to the calibration of the device.
Action: Install the previous software version or have the device calibrated at the factory.
Permissible system leakage capacitance C
E.07 The device is not suitable for the present network leakage capacitance C
Action: Uninstall the device.
Calibration error
E.08
Action: Check connection, eliminate error. If the error is still present, there is a device error.
10 isoES425_D00214_01_M_XXEN/10.2023
, the two parameters "U˂" and "U˃" can be enabled in the response-value
n
is monitored. If the system voltage U
n
reaches, falls below, or exceeds
n
Meaning
exceeded
e
set
n
.
e