Bender A-ISOMETER IR425 User Manual

1
Isolationsüberwachungsgerät
Bestimmungsgemäße Verwendung
Das A-ISOMETER® IR425 überwacht den Isolationswiderstand R
F
eines ungeerdeten AC/DC-Steuerstromkreises (IT-System) von
AC 0...300 V bzw. DC 0...300 V. Die zulässige Netzableitkapazität
C
e
max beträgt 20 µF.
Sicherheitshinweise allgemein
Bestandteil der Gerätedokumentation sind neben diesem Daten-
blatt die beiliegenden „Wichtigen sicherheitstechnischen Hin-
weise für Bender-Produkte“.
Sicherheitshinweise gerätespezifisch
Funktionsbeschreibung
Das A-ISOMETER® IR425 erzeugt eine pulsierende Messspan-
nung. Diese wird über die Klemmen L1/L2 und KE/E dem zu über-
wachenden IT-System überlagert. Ohmsche Isolationsfehler
zwischen IT-System und Erde schließen den Messkreis. Der aktu-
elle gemessene Isolationswiderstand wird auf dem Display des
Geräts angezeigt.
Preset-Funktion
Nach erstem Anlegen der Versorgungsspannung U
S
und ange-
koppeltem IT-System werden die Ansprechwerte R
an1
/R
an2
(Alarm 1/2) einmalig automatisch auf folgende Werte gesetzt:
U
n
> 72 V: Ansprechwert 1 = 46 kΩ, Ansprechwert 2 = 23 kΩ
U
n
≤ 72 V: Ansprechwert 1 = 20 kΩ, Ansprechwert 2 = 10 kΩ
Die Preset-Funktion wird nach Rücksetzen auf die Werkseinstel-
lungen erneut ausgeführt.
Selbsttest, automatisch
Das Gerät führt nach dem Zuschalten der Versorgungsspannung
U
S
und danach alle 24 h einen Selbsttest durch, bei dem interne
Funktionsstörungen oder Anschlussfehler ermittelt und als Feh-
lercode auf dem Display angezeigt werden. Die Alarm-Relais wer-
den dabei nicht geprüft.
Selbsttest, manuell
Durch Betätigen der internen/externen Testtaste > 1,5 s führt das
Gerät einen Selbsttest durch, bei dem interne Funktionsstörun-
gen oder Anschlussfehler ermittelt und als Fehlercode auf dem
Display angezeigt werden. Die Alarm-Relais werden dabei ge-
prüft.
Während des Drückens der Test-Taste werden alle für dieses Ge-
rät verfügbaren Display-Elemente angezeigt.
Funktionsstörung
Liegt eine Funktionsstörung vor, schaltet Relais K2 (21, 22, 24)
und alle 3 LEDs blinken. Das Display zeigt einen Fehlercode.
E01 = Schutzleiter-Anschluss fehlerhaft, keine niederohmige
Verbindung zwischen E und KE.
E02 = Netz-Anschlussfehler, keine niederohmige Verbindung
zwischen L1 und L2.
E03...Exx = Interner Gerätefehler
In jedem leitend verbundenen System darf nur ein
Isolationsüberwachungsgerät angeschlossen sein.
Vor Isolations- und Spannungsprüfungen an der An-
lage muss das Isolationsüberwachungsgerät für die
Dauer der Prüfung vom IT-System getrennt sein.
Insulation monitoring device
Intended use
The IR425 A-ISOMETER® monitors the insulation resistance of an
unearthed AC or DC control circuit (IT system) of AC 0...300 V re-
spectively DC 0...300 V. The maximum permissible system leak-
age capacitance C
e
is 20 µF.
Safety instructions
In addition to this data sheet, the documentation of the device in-
cludes a sheet entitled "Important safety instructions for BENDER
products".
Device-specific safety information
Function
The IR425 A-ISOMETER® generates a pulsating measuring volt-
age which is superimposed on the IT system being monitored via
the terminals L1/L2 and KE/earth. Ohmic insulation faults close
the measuring circuit between the IT system and earth. The cur-
rently measured insulation resistance is shown on the display of
the device.
Preset function
After connecting the supply voltage U
S
and connecting the IT sys-
tem for the first time, the response values R
an1
/R
an2
(Alarm 1/2)
are automatically set once to:
U
n
> 72 V: response value 1 = 46 kΩ, response value 2 = 23 kΩ
U
n
≤ 72 V: response value 1 = 20 kΩ, response value 2 = 10 kΩ
After resetting the device values to its factory settings, the Preset
function is automatically active again.
Automatic self test
The device automatically carries out a self test after connecting to
the supply voltage U
S
and later every 24 hours. During the self
test, internal functional faults or connection faults will be deter-
mined and will appear in form of an error code on the display. The
alarm relays are not checked during this test.
Manual self test
After pressing the internal/external test button for > 1.5 s, the de-
vice carries out a self test. During this test, internal functional
faults, or connection faults will be determined and will appear in
form of an error code on the display. The alarm relays are checked
during this test.
With the test button pressed and held down, all device-related
display elements appear on the display.
Malfunction
In case of a malfunction, the relay K2 (21, 22, 24) switches and all
of the three LEDs flash. An error code appears on the display.
E01 = PE connection fault, no low-resistance
connection between E and KE.
E02 = system connection fault, no low-resistance connection
between L1 and L2.
E03...Exx = internal device error
Only one insulation monitoring device may be used
in each interconnected system.
When insulation and voltage tests are to be carried
out, the device shall be isolated from the system for
the test period.
A-ISOMETER® IR425
TBP103005 / 09.2010
Deutsch English

Bender A-ISOMETER IR425 Specifications

General

Protection class	II
Standards	IEC 61557-8
Measuring current	1 mA
Supply voltage	DC 24 V
Temperature range	-10°C to +50°C
Protection degree	IP20
Resolution	0.1 MΩ
Measurement current	1 mA
Operating voltage	DC 24 V
Operating temperature	-10°C to +50°C
Relative humidity	≤ 95% (non-condensing)
Storage temperature	-20°C to +70°C

Summary

Insulation Monitoring Device

Intended Use

Monitors insulation resistance of unearthed AC/DC control circuits.

General Safety Instructions

General safety guidelines for Bender products.

Device-Specific Safety Information

Crucial safety precautions specific to the insulation monitoring device.

Function Description

Describes how the device generates a pulsating measuring voltage.

Preset Function

Automatically sets response values upon first connection.

Self-Test Functionality

Device performs automatic or manual self-tests for faults.

Malfunction Indicators

Indicates device malfunctions with error codes and LED/relay status.

Time Delays and Response Times

Starting Delay t

Delays alarm indication after power connection.

Response Delay ton

Delays alarm indication upon falling below response value.

Password Protection

Enables/disables settings access via password.

Factory Settings

Resets all settings to factory defaults and adapts response values.

Installation and Connection

DIN Rail Mounting

Instructions for mounting the device on a standard DIN rail.

Screw Fixing Method

Alternative mounting method using screws.

Wiring Diagram Connection

Connects the device according to the provided wiring diagram.

Wiring Diagram and Terminals

Terminal Connections Overview

Details the connection of terminals for power and system monitoring.

Indicating and Operating Elements

Explains display elements, indicators, and their functions.

Device Operation and Settings

Device Indicators and Controls

Describes the function of LEDs, buttons, and display segments.

Factory Setting and Preset Function

Automatic setting of response values based on system voltage.

Menu Overview

Overview of the device's menu structure and navigable items.

Parameter Adjustment

Setting Response Values

Configures alarm response values based on insulation resistance thresholds.

Fault Memory and Alarm Relays

Configures fault memory and operating modes for alarm relays.

Time Delay Configuration

Setting Time Delays

Configures response and starting delays for alarms.

Security and Reset Functions

Password Protection Management

Activates, changes, or deactivates password protection for settings.

Reset to Factory Settings

Restores the device to its original factory configuration.

Device Information and Commissioning

Device Information Query

Retrieves software version and other device information.

Commissioning and Functional Testing

Guidelines for initial setup, connection checks, and functional testing.

Technical Data

Insulation Coordination

Specifies insulation coordination standards and voltages.

Supply Voltage and IT System

Details device supply voltage requirements and IT system parameters.

Response Values and Time Behavior

Lists response values, error tolerances, and time characteristics.

Measuring Circuit and Inputs

Describes the measuring circuit, display, inputs, and switching elements.

Contact Data

Provides contact data according to IEC 60947-5-1 standards.

Environmental and EMC Specifications

Environmental and EMC Compliance

Details operating temperature, climatic categories, and EMC standards.

Connection Properties

Specifies terminal types, wire capacities, and tightening torques.

Mounting and Ordering Information

Covers mounting options, protection types, and product ordering details.