Bender EDS460 User manual

Manual
EN
EDS460-490_D00085_01_M_XXEN/02.2016
EDS460/490 and EDS461/491
Insulation fault locator
Software version: EDS4.0-D: D234 V3.1 / D256 V2.2
EDS4.0-L: D234 V3.1 / D216 V2.2
EDS4.1-D: D358 V3.1 / D256 V2.2
EDS4.1-L: D358 V3.1 / D216 V2.2

Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Gruenberg • Germany
Postfach 1161 • 35301 Gruenberg • Germany
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Web: http://www.bender.de
©Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
Photos: Bender archive

Table of contents
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EDS460-490_D00085_01_M_XXEN/02.2016
1. Making effective use of this document ....................................................... 7
1.1 How to use this manual ................................................................................. 7
1.2 Explanation of symbols and notes ............................................................. 8
2. Safety instructions ........................................................................................... 9
2.1 Intended use ...................................................................................................... 9
2.2 Qualified personnel ...................................................................................... 10
2.3 Safety information ........................................................................................ 11
2.4 Delivery conditions, guarantee, warranty and liability .................... 11
3. System description ........................................................................................ 13
3.1 Features ............................................................................................................ 13
3.1.1 Areas of application ...................................................................................... 13
3.1.2 Standards ......................................................................................................... 13
3.1.3 System versions ............................................................................................. 13
3.1.4 System features .............................................................................................. 13
3.2 Function of the EDS system ....................................................................... 14
3.2.1 Block diagram EDS system ......................................................................... 15
3.2.2 Test cycle .......................................................................................................... 16
3.2.3 Currents in the EDS system ........................................................................ 17
3.2.4 Requirements for reliable insulation fault location .......................... 18
4. Installation and connection ......................................................................... 21
4.1 Unpacking ........................................................................................................ 21
4.2 Fuses, max. voltage, cable lengths ......................................................... 22
4.3 Notes on mounting ...................................................................................... 22
4.3.1 Dimension diagram EDS460/461-D/-L .................................................. 23
4.3.2 Dimension diagram EDS490/491-D/-L .................................................. 23

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4EDS460-490_D00085_01_M_XXEN/02.2016
4.4 Connection ...................................................................................................... 24
4.4.1 Wiring diagram EDS460/461-D / -L ......................................................... 24
4.4.2 Wiring diagram EDS490/491-D / -L ......................................................... 26
4.4.3 Connection of W…, WR…, WS…-series measuring current
transformers .................................................................................................... 28
4.4.4 Connection example EDS standard system with FTC4…XET ....... 29
5. Commissioning .............................................................................................. 31
5.1 Before switching on ...................................................................................... 31
5.2 Switching on ................................................................................................... 32
6. Operation ........................................................................................................ 35
6.1 EDS…-D operating and display elements ............................................ 35
6.2 EDS…-L operating and display elements ............................................. 36
6.3 Working in operating mode ...................................................................... 37
6.3.1 Standard display ............................................................................................ 37
6.3.2 Alarms and their effects .............................................................................. 37
6.3.3 Carrying out a test ......................................................................................... 39
6.3.4 Resetting saved alarm messages (RESET) ............................................. 40
6.3.5 Displaying standard information ............................................................. 41
6.4 Setting the EDS…-L ...................................................................................... 42
6.5 Operating and setting the EDS…-D ....................................................... 42
6.5.1 Opening the main menu ............................................................................ 43
6.5.2 Menu overview diagram ............................................................................. 44
6.5.3 Main menu functions ................................................................................... 45
6.6 The main menu .............................................................................................. 46
6.6.1 Menu 1: Alarm/meas. values ..................................................................... 46
6.6.2 Menu 2: History .............................................................................................. 48
6.6.3 Menu 3: Settings ............................................................................................ 49
6.6.3.1 Settings menu 1: General ................................................................... 50
6.6.3.2 Settings menu 2: Channel .................................................................. 51
6.6.3.3 Settings menu 3: Relay ........................................................................ 55
6.6.3.4 Settings menu 4: History .................................................................... 56

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EDS460-490_D00085_01_M_XXEN/02.2016
6.6.3.5 Settings menu 5: Language .............................................................. 56
6.6.3.6 Settings menu 6: Interface ................................................................ 56
6.6.3.7 Settings menu 7: Alarm addresses ................................................. 57
6.6.3.8 Settings menu 8: Clock ....................................................................... 57
6.6.3.9 Settings menu 9: Password ............................................................... 58
6.6.3.10 Settings menu 10: Factory settings ................................................ 59
6.6.3.11 Settings menu 11: Service ................................................................. 59
6.6.4 Menu 4: Control ............................................................................................. 59
6.6.4.1 Control menu 1: TEST .......................................................................... 59
6.6.4.2 Control menu 2: RESET ....................................................................... 59
6.6.4.3 Control menu 3: Test communication .......................................... 59
6.6.5 Menu 5: External devices ............................................................................ 61
6.6.6 Menu 6: Info .................................................................................................... 64
7. Tests and service ........................................................................................... 65
7.1 Periodic tests ................................................................................................... 65
7.2 Maintenance ................................................................................................... 65
7.3 Service ............................................................................................................... 65
7.4 Troubleshooting ............................................................................................ 66
7.4.1 Display device error ...................................................................................... 66
7.4.2 Device error display (channel-related) .................................................. 67
7.4.3 CT connection fault display (channel-related) ................................... 68
7.4.4 Display "peak" ................................................................................................. 68
7.4.5 External alarm ................................................................................................. 68
8. Data .................................................................................................................. 69
8.1 Standards ......................................................................................................... 69
8.2 Approvals and certifications ..................................................................... 69
8.3 Technical data EDS460/490/EDS461/491 ............................................. 70
8.4 Response sensitivity characteristics ....................................................... 74
8.4.1 Characteristic curves EDS460/490 .......................................................... 77
8.4.1.1 EDS460/490 characteristics for 3AC systems .............................. 77
8.4.1.2 EDS460/490 characteristics for AC systems ................................ 80

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EDS460-490_D00085_01_M_XXEN/02.2016
8.4.1.3 EDS460/490 characteristics for DC systems ................................ 82
8.4.2 Characteristic curves EDS461/491 .......................................................... 84
8.4.2.1 EDS461/491 characteristics for AC systems ................................ 84
8.4.2.2 EDS461/491characteristics for DC systems ................................. 87
8.5 Ordering information .................................................................................. 89
INDEX ..................................................................................................................... 97

Making effective use of this document
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EDS460-490_D00085_01_M_XXEN/02.2016
1. Making effective use of this document
1.1 How to use this manual
This operating manual describes EDS460/490 resp. EDS461/491 insulation
fault locators. It is designed for skilled persons working in electrical enginee-
ring and electronics and in particular for those designing, installing and ope-
rating electrical systems.
Before using the equipment, please read this operating manual, the supple-
ment entitled "Important safety instructions for Bender products", the "BMS
bus" instruction leaflet, as well as the instruction leaflets supplied with the in-
dividual system components. Please keep this documentation close at hand
near to the equipment.
Should you have any questions, please do not hesitate to contact our techni-
cal sales team. We are also happy to provide on-site services. Please contact
our Service Department for more information.
Service-Hotline: 0700-BenderHelp (Telephone and Fax)
Carl-Benz-Straße 8 • 35305 Grünberg • Germany
Tel: [phone] • Fax: [phone]
E-Mail: [e-mail] • www.bender.de
Although great care has been taken in the drafting of this operating manual,
it may nevertheless contain error and mistakes. The Bender group cannot
accept any liability for injury to persons or damage to property resulting from
errors or mistakes in this manual.

Making effective use of this document
8EDS460-490_D00085_01_M_XXEN/02.2016
1.2 Explanation of symbols and notes
The following terms and symbols are used to denote hazards and instructions
in Bender documentation:
This signal word indicates that there is a high risk of
danger that will result in electrocution or serious injury if
not avoided.
This signal word indicates a potential risk of danger.
Failure to observe the associated instructions and take
appropriate precautions may result in death, serious
physical injury or substantial damage to property
This signal word indicates a low level risk that can result in
minor or moderate injury or damage to property if not
avoided.
This symbol denotes important information intended to
assist the user in making optimum use of the product.
DANGER
WARNING
CAUTION

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EDS460-490_D00085_01_M_XXEN/02.2016
2. Safety instructions
2.1 Intended use
EDS… insulation fault locators are used for localisation of insulation faults in
unearthed DC, AC and three-phase power supply systems
(IT systems). Alternating and three-phase systems in the range of AC 24 to 690
V and DC systems in the range of DC 24 to 500 V can be monitored. The ope-
rating frequency is optionally DC, 50, 60 or 400 Hz. The nominal system volta-
ge varies with the type of locating current injector (PGH47., IRDH575).
An EDS system consists of the insulation fault locators EDS460/490 or EDS461/
491 and either the A-ISOMETER® IRDH575 or locating current injector PGH.
Using measuring current transformers, EDS460/490 or EDS461/491 insulation
fault locators detect locating current signals generated by the IRDH575 insu-
lation monitoring device or PGH… locating current injector and evaluate
them.
If the locating current is too high, IRDH575 or PGH… may
damage sensitive loads (e.g. in control circuits) or may
accidentally activate switching operations. Therefore, it is
recommended to use a PGH… with a low locating current
or to set a low locating current at the IRDH575. The
response sensitivity of EDS461/491 insulation fault locators
is higher and hence they are capable of evaluating this low
locating current.
In case of doubt, please contact a Bender product manager.
CAUTION

Safety instructions
10 EDS460-490_D00085_01_M_XXEN/02.2016
Up to 12 measuring current transformers can be connected to one EDS…. Up
to 90 EDS… insulation fault locators can be connected via a BMS bus (RS-485
interface with BMS protocol), thereby up to 1080 measuring channels (sub-cir-
cuits) can be monitored. The scanning time for all channels is
– for EDS460/EDS490 approx. 8…24 s
– for EDS461/EDS491 approx. 14…30 s
The individual parameterisation, necessary to adjust the insulation fault loca-
tor to the existing system and utilisation conditions, must be carried out at the
place of utilisation in order to meet the requirements laid down in the stan-
dards.
Please take note of the limits for the application area specified in the technical
data. Any other use, or use which goes beyond the foregoing is deemed to be
use other than for the intended purpose.
Use for the intended purpose also includes:
 The observation of all information in this operating manual.
 and the compliance with test intervals.
2.2 Qualified personnel
Only skilled persons may work on Bender devices. Personnel who are familiar
with the assembly, commissioning and operation of the equipment and have
undergone appropriate training are considered qualified. Such personnel
must have read this manual and understood all instructions relating to safety.

Safety instructions
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EDS460-490_D00085_01_M_XXEN/02.2016
2.3 Safety information
Bender devices are built in accordance with the state of the art and accepted
rules in respect of technical safety. Nevertheless, the use of such devices may
introduce risks to the life and limb of the user or third parties and/or result in
damage to Bender devices or other property.
 Only use Bender devices:
– for the purpose for which it is intended;
– when it is in perfect condition as far as safety is concerned;
– in compliance with the accident prevention regulations and guide-
lines applicable in the location of use.
 Any faults which may impair safety must be eliminated immediately.
 Do not make any unauthorised changes and only use replacement
parts and optional accessories purchased from or recommended by
the manufacturer of the equipment. Failure to observe this require-
ment can result in fire, electric shock and injury.
 Warning signs must always be easily legible. Damaged or illegible signs
must be replaced immediately.
2.4 Delivery conditions, guarantee, warranty and liability
The conditions of sale and delivery set out by Bender shall apply. Conditions
of sale and delivery can be obtained from Bender in printed or electronic for-
mat.

Safety instructions
12 EDS460-490_D00085_01_M_XXEN/02.2016

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EDS460-490_D00085_01_M_XXEN/02.2016
3. System description
3.1 Features
3.1.1 Areas of application
 Insulation fault location in AC, AC / DC and DC IT systems
 Main and control circuits in industrial installations and ships
 Diode-decoupled DC IT systems in power stations
 Systems for medical locations
3.1.2 Standards
The standard for unearthed power supply systems (IT systems) IEC 60364-4-41
requires that a first fault is to be eliminated with the shortest practicable delay.
Fast insulation fault location is possible with EDS systems.
3.1.3 System versions
EDS460, EDS461, EDS490 or EDS491 insulation fault locators differ in their re-
sponse sensitivity and/or number of alarm relays.
3.1.4 System features
 Universal system concept;
 Modular design, hence easily adaptable to the individual conditions of
the system;
 Measuring current transformers in various sizes and types of construc-
tion;
 Communication between the components via BMS bus (two-wire);
 All measuring current transformers are scanned simultaneously;
 Central indication of faulty sub-circuits;
 Various setting options allow individual adjustments;
 Connection to higher level control and visualisation systems can easily
be established.

System description
14 EDS460-490_D00085_01_M_XXEN/02.2016
3.2 Function of the EDS system
When an insulation fault is detected by the insulation monitoring device in
the IT system, the insulation fault location process will be started.
On the occurrence of a first insulation fault, a fault current essentially determi-
ned by the system leakage capacitances flows in the IT system. The funda-
mental idea in fault location is therefore to close the fault current loop for a
short period via a defined resistance. As a result of this principle, the system
voltage itself drives a locating current containing a signal that can be evalua-
ted.
The locating current signals are generated periodically by the IRDH575 res-
pectively the PGH… . The locating current is limited in amplitude and time. As
this happens, the system conductors are connected alternately to earth via a
defined resistance. The locating current generated in this manner depends on
the magnitude of the present insulation fault and the system voltage. It is li-
mited according to the setting of the IRDH575 respectively the PGH… . For pl-
anning purposes, it should be noted that no system components are present
in which this locating current can bring about a damaging reaction, even in
unfavourable cases.
The locating current pulse flows from the locating current injector via the live
parts, taking the shortest path to the location of the insulation fault. From the-
re, it flows via the insulation fault and the PE back to the IRDH575 respectively
PGH… . This locating current pulse is then detected by the measuring current
transformers located in the insulation fault path, and is signalled by the con-
nected insulation fault locator.
Additional information is available in the data sheet "Technical issues affec-
ting the use of insulation fault location systems".

System description
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EDS460-490_D00085_01_M_XXEN/02.2016
3.2.1 Block diagram EDS system
Legend
EDS… Insulation fault locator
PGH… Locating current injector
IRDH575
A-ISOMETER® IRDH575 with integrated locating current injector
UsCurrent source IT system
W Measuring current transformer
V Electrical load
RFd Insulation fault downstream of the measuring current trans-
former
PE Protective conductor respectively equipotential bonding
conductor
BMS BMS bus

System description
16 EDS460-490_D00085_01_M_XXEN/02.2016
3.2.2 Test cycle
The duration of a locating current pulse cycle is 6 seconds. The IRDH575 or
PGH… alternatively sends positive or negative locating current pulses. The
test cycle of the IRDH575 or PGH… is shown in different switch positions
(1,2,3) in the block diagram below, („Block diagram EDS system“ on page 15).
EDS start
Position
PGH... 12331
2 sec 4 sec 2 sec 4 sec

System description
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EDS460-490_D00085_01_M_XXEN/02.2016
3.2.3 Currents in the EDS system
In addition to the block diagram on page 15, the path of the residual currents
and the locating current is shown in the diagram below:
Legend
............. Locating current loop I∆s
.. .. .. .. Residual currents I∆(example)
CLu Upstream capacitances, system leakage capacitances
upstream the measuring current transformer.
CLd Downstream capacitances, system leakage capacitances
downstream the measuring current transformer.
RFu Insulation fault upstream the measuring current transformer.
RFd Insulation fault downstream the measuring current transfor-
mer.

System description
18 EDS460-490_D00085_01_M_XXEN/02.2016
The following residual currents flow through the measuring current transfor-
mer of the EDS… :
 The locating current I∆scaused by the insulation fault RFd
 Residual currents I∆flowing through the system leakage capacitances
CLu, and CLd, respectively which are caused by RFu and RFd
 Transient leakage currents caused by switching and control activities in
the system
 Low-frequency leakage currents caused by the use of converters
3.2.4 Requirements for reliable insulation fault location
The EDS… is intended to locate insulation faults downstream of the measu-
ring current transformer RFd. For this purpose, the locating current caused by
the insulation fault has to be detected reliably, subject to the condition that:
 The locating current I∆sfor the EDS460/490 is more than 1.5 mA and
less than 50 mA.
 The locating current I∆sfor the EDS461/491 is more than 0.15 mA and
less than 5 mA.
 The upstream capacitances CLu must be at least as large as the down-
stream capacitances CLd.
 The system leakage capacitance does not have to be too large (see
„Response sensitivity characteristics“ on page 74).
 The total residual current through the measuring current transformer
(locating current and residual currents etc.) may be a maximum of 10 A
(EDS460/490) respectively 1 A (EDS461/491).
 Not only does the amplitude influence the reliable detection of the
locating current but also the residual current frequency. This effect is
illustrated in the following fault curve.

System description
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EDS460-490_D00085_01_M_XXEN/02.2016
Fault curve
Safe insulation fault location is only possible in the grey-shaded area.
A measuring channel where insulation fault location is not possible is marked
with "peak" in the "Alarm/meas. values" menu.
Example: A residual current of 2 A/20 Hz (marked with a point (•) in the dia-
gram) would be outside the permissible range.
Symmetrical insulation faults downstream of the
measuring current transformer are not recognised under
certain circumstances.
Low-frequency residual currents (caused by converters, for
example) may have the effect that insulation faults cannot
be found when their frequency is equal or nearly equal the
test cycle frequency of the IRDH575 respectively PGH… .

System description
20 EDS460-490_D00085_01_M_XXEN/02.2016