Bender ISOSCAN W Series - Page 4

Table of contents
4.8 Connection of the relays............................................................................................................................ 23
4.9 BS bus termination....................................................................................................................................... 23
4.10 Connection of the X2 interface (k1-12/l1-12).....................................................................................24
4.10.1 Connection of CTAC… series measuring current transformers...................................................24
4.10.2 Connection of measuring current transformer CTBC… to EDS441-LAB-4...............................26
4.10.3 Connection of CTAF…SET series measuring current transformers to EDS440-LAF-4..........27
4.11 Connection to a 3(N)AC system.............................................................................................................. 28
4.12 Connection to an AC system....................................................................................................................29
4.13 Connection to a DC system...................................................................................................................... 30
4.14 Connection example: ISOMETER® iso685-D-P, EDS440-S, IOM441-S and EDS440-L.............31
5 Display and alarm messages...........................................................................32
5.1 Display elements EDS44…-S.................................................................................................................... 32
5.2 Operating and display elements EDS44…-L...................................................................................... 32
5.3 Standard display in operating mode.....................................................................................................33
5.3.1 Standard display EDS44…-S..................................................................................................................... 33
5.3.2 Standard display EDS44…-L..................................................................................................................... 33
5.4 Alarm messages.............................................................................................................................................34
5.4.1 Insulation fault (ALARM I
ΔL
).......................................................................................................................34
5.4.2 Residual current exceeded (ALARM I
Δn
)............................................................................................... 35
5.4.3 Connection fault of the current transformers....................................................................................35
5.4.4 Device error, BB bus error..........................................................................................................................36
5.4.5 Device error, failure BS bus master........................................................................................................ 37
5.4.6 Error message................................................................................................................................................. 37
5.4.7 Acoustic alarm message.............................................................................................................................37
6 Commissioning................................................................................................. 38
6.1 Requirements for reliable insulation fault location..........................................................................38
6.2 Before switching on..................................................................................................................................... 38
6.3 Switching on................................................................................................................................................... 39
6.4 Steps for commissioning ISOMETER® and EDS..................................................................................39
6.5 Periodic verification......................................................................................................................................40
7 Device communication.................................................................................... 41
7.1 RS-485 interface.............................................................................................................................................41
7.2 Bender Sensor bus (BS bus)...................................................................................................................... 41
7.3 Modbus RTU....................................................................................................................................................42
8 Operation.......................................................................................................... 43
4 EDS44x_D00201_10_M_XXEN/11.2023