Insulation Monitoring Device for IT AC systems with galvanically connected rectifiers and inverters for IT DC systems specific to railway applications

ISOMETER® isoRW685W-D Insulation Monitoring Device for IT AC systems with galvanically connected rectifiers and inverters for IT DC systems specific to railway applications Device features • ISOMETER® for IT AC systems with galvanically connected rectifiers or inverters and for IT DC systems (IT = unearthed systems) • Automatic adaptation to the existing system leakage capacitance • Combination of AMPPLUS and other profile-specific measurement methods • Two separately adjustable response value ranges of 1 kO ... 10 MO • Connection monitoring (monitoring of the measuring lines) • Automatic device...

Function description The insulation monitoring device continuously monitors the entire insulation resistance of an IT system during operation and triggers an alarm when the value falls below a preset response value. For measurement, the device has to be connected between the IT system and the protective earth conductor (PE). A measuring current in the µA range is superimposed onto the system which is recorded and evaluated by a microprocessorcontrolled measuring circuit. The measuring time is dependent on the selected measurement profiles, the system leakage capacitance, the insulation resistance...

Connection to the power supply voltage Us Connector for the IT system to be monitored Connector for the IT system to be monitored Connector for the IT system to be monitored Ethernet interface Switchable terminating resistor for termination of the RS-485 interface Connector for alarm relay 1 Connector for alarm relay 2 isoxx685(W)-x-P… only: optional expansion interface for Bender products

ConnectionConnection requirementsConnection to a supply voltage J Check proper connection! Prior to commissioning the installation, check that the device has been properly connected and check the device functions. Perform a functional test using an earth fault via a suitable resistance. Connection to the Ethernet interface ETH If a monitored AC system contains galvanically coupled DC circuits, the following applies: An insulation fault can only be detected with its correct value when the rectifier valves carry a minimum current of >10 mA. Use 60/75 °C copper lines only! For UL and CSA applications,...

Insulation coordination acc. to IEC 60664-1/-3 IT system being monitored Rated voltage Overvoltage category Nominal system voltage range Un Measuring circuit (IC1) Supply circuit (IC2) Output circuit 1 (IC3) Output circuit 2 (IC4) Control circuit (IC5) Nominal system voltage range Un for UL applications Rated impulse voltage Response values Response value ^-1 (ALARM 1) Response value (ALARM 2) Relative uncertainty (acc. to IEC 61557-8) Hysteresis Rated insulation voltage Pollution degree outside {Un < 690 V) 3 Pollution degree outside (690 V < Un < 1000 V) 2 Time response Response time fan profile-dependent,...

SERVICE yellow Interface / protocol Data rate Mode 1 Cable: twisted pairs, shield connected to PE on one side Cable length (depending on the baud rate) Terminating resistor Device address <1200 m terminals X1A, X1B 120 O, can be connected internally 1.90 active high, active low off, test, reset, deactivate device, start initial measurement Low DC -3.. .5 V, High DC 11.. .32 V ±10 % Operating mode, adjustable Functions Utilisation category Rated operational voltage Rated operational current Rated insulation voltage at < 2000 m AMSL Rated insulation voltage at < 3000 m AMSL Minimum contact rating...

Screw-type terminals Operating mode Mounting position Degree of protection, internal components Degree of protection, terminals DIN rail mounting acc. to Screw mounting Enclosure material Flammability class (UL 94) ANSI Code Dimensions (W × H × D) Weight * For best ventilation, align cooling slots vertically (0°). Nominal current Tightening torque Conductor sizes Stripping length Wire cross-section rigid/flexible flexible with ferrule with/without plastic sleeve Multiple conductor, rigid Multiple conductor, flexible Multiple conductor, flexible with ferrule without plastic sleeve Multiple conductor,...

Standards and certifications The ISOMETER® has been developed in compliance with the following standards:

Bender GmbH & Co. KG Londorfer Straße 65 35305 Grünberg Germany Tel.: +49 6401 807-0 [email protected] www.bender.de © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 08.2024 unless otherwise indicated.