ISOSCAN® EDS440 and EDS441 Insulation fault locator to locate insulation faults in ungrounded DC, AC and three-phase power supplies

ISOSCAN® EDS440 and EDS441 Insulation fault locator to locate insulation faults in ungrounded DC, AC and three-phase power supplies System properties • Universal system design • Modular design, therefore easily adjustable to the given circumstances • Measuring current transformers available in various sizes and versions • Twelve measuring channels for series W..., WR..., WS... measuring current transformers • Optional extension by twelve relay channels • Fault memory behaviour selectable • Up to 50 EDS insulation fault locators in the system, 600 measuring channels • Response sensitivity: • AC...

When an insulation monitoring device detects an insulation fault, it starts the insulation fault location. In the event of a first insulation fault, an undefined residual current flows in IT systems, which is primarily defined by the system leakage capacitances and the value of the insulation fault. The basic idea of insulation fault location is therefore to generate a defined locating current IL that flows through the insulation fault. The locating current is driven by the system voltage and can be located in the faulty outgoing circuit using the measuring current transformer. The locating current...

Status LEDs ON Flashes: Starting process; hourly transformer connection test Status LED ON Flashes: Starting process; hourly transformer connection test COM/ADDR. Flashes quickly: device communicates via RS-485 interface Flashes: insulation fault location (LED indicate the pulse of the locating current injector: pulse = on; pause = off. In LAB procedure, the pulse can last one minute.) SERVICE Lights up: device error; connection fault of the measuring current transformers; error message e.g. due to low-frequency residual currents, external magnetic fields, etc. ALARM I#L Lights up: main alarm,...

Connection to the voltage supply | u u I J Voltage supply back-up fuse If the device is supplied via an external power supply unit, the back-up fuse Fback-upat connection "A1/+ A2/-” must be selected in such a way that the feeding power supply unit is able to trip the DC-compatible back-up fuse. A back-up fuse of650 mA/Tis recommended when using a 24 Vpower supply unit (min. 1 A). The EDS44...-S does not feature an X1 interface and can only be connected via the BB bus. Activating a terminating resistor to define the first and the last device in the bus system. J Cable lengths of the measuring...

Connection of CTAC… series measuring current transformers For insulation fault location, the measuring current transformers of the CTAC… series are used. Connection of measuring current transformer CTBC… to EDS441-LAB-4 CTAC… series measuring current transformers Terminals 1 and 2 as well as terminals 3 and 4 of the measuring current transformer are bridged internally. The connections k and l must not be interchanged on the EDS44…. Live conductors and measuring current transformers Ensure that all live conductors are routed through the measuring current transformer. Do not route any existing...

Connection to a 3(N)AC system 1 Measuring current transformers Us Connection of the supply voltage only to EDS44...-L

Connection to a DC system 1 Measuring current transformers Us Connection of the supply voltage only to EDS44...-L

Connection to an AC system 1 Measuring current transformers Us Connection of the supply voltage only to EDS44...-L

Connection example: ISOMETER® iso685-D-P, EDS440-S, IOM441-S and EDS440-L Communication between iso685-...-P and EDS44...-L runs exclusively via BS bus (RS-485).

Technical data ISOSCAN® EDS440 and EDS441 Response values Supply circuit (IC1) Output circuit 1 (IC2) Output circuit 2 (IC3) Control circuit (IC4) Rated voltage Overvoltage category Range of use Response value for insulation fault location (/AL) 2.10 mA 0.2.1 mA min. ±2 mA min. ±0.2 mA Response value for residual current measurement 0.1.10 A 0.1.1 A Rated impulse voltage Rated insulation voltage Pollution degree outside (Un < 690 V) 3 Pollution degree outside (Un > 690 V < 1000 V) 2 Protective separation (reinforced insulation) between Voltage tests (routine test) acc. to IEC 61010-1 Supply voltage...

SERVICE yellow 1...12 channel indication yellow Contact data acc. to IEC 60947-5-1 Utilization category AC-13 / AC-14 / DC-12 / DC-12 / DC-12 / DC-12 Rated operational voltage 230 V / 230 V / 24 V / 48 V / 110 V / 220 V Rated operational current 5 A / 3 A / 1 A / 1 A / 0.2 A / 0.1 A Minimum contact rating 11 mA at AC/DC >10 V Digital inputs Number Operating mode, adjustable Voltage level active high, active low none, test, reset low DC -5.5 V, high DC 11.32 V Digital current output Ambient temperatures Operating temperature Current Tolerance Load resistance none, alarm IAL, alarm IAn, device...

Operating mode Mounting ambient temperature > 55 °C ambient temperature < 55 °C Degree of protection, internal components Degree of protection, terminals DIN rail mounting Screw fixing Enclosure material Flammability class Dimensions in mm (W x H x D) continuous operation vertical any alignment IP40 IP20 IEC 60715 2 x M4 with mounting clip polycarbonate UL 94 V-0 72 x 93 x 63 "W'' option data deviating from the standard version Devices with the suffix "W" feature increased shock and vibration resistance. The electronics is covered with a special varnish to provide increased protection against...

Insulation fault locators

Measuring current transformers for EDS441 Recommended Bender measuring current transformers Measuring current transformers for EDS441-LAB Bender measuring current transformers Alternative measuring current transformers from the Bender program Measuring current transformers for EDS440-LAF Bender measuring current transformers RBENDERBender GmbH & Co. KG Londorfer StraGe 65 35305 Grunberg Germany © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 06.2025 unless otherwise indicated.