Eaton Moeller ZEV Series Service manual

Moeller GmbH
Industrieautomation
Hein-Moeller-Straße 7–11
D-53115 Bonn
E-Mail: [e-mail]
Internet: www.moeller.net
© 2001 by Moeller GmbH
Subject to alteration
AWB2300-1433GB IM-D/IM-D/Ki 11/01
Printed in the Federal Republic of Germany (04/03)
Article No.: 267430
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Building Automation SystemsIndustrial Automation
Hardware and Engineering
11/01 AWB2300-1433GB
ZEV motor-protective system
Overload monitoring
of motors in EEx e areas
Rückenbreite entfällt

All brand and product names are trademarks or registered
trademarks of the owner concerned.
1st published 2001, edition date 11/01
© Moeller GmbH, 53105 Bonn
Author: Klaus Grül
Editor: Heidrun Riege
Translator: Harold Schierbaum
All rights reserved, including those of the translation.
No part of this manual may be reproduced in any form
(printed, photocopy, microfilm or any other process) or
processed, duplicated or distributed by means of electronic
systems without written permission of Moeller GmbH, Bonn.
Subject to alteration without notice.
Rückenbreite festlegen! (1 Blatt = 0,106 mm)

I
Before commencing the installation
• Disconnect the power supply of the device.
• Ensure relosing interlock that devices
cannot be accidentally restarted.
• Verify isolation from the supply.
• Connect to earth and short-circuit.
• Cover or fence off neighbouring live parts.
• Follow the installation instructions (AWA)
included with the device.
• Only suitably qualified personnel in
accordance with EN 50110-1/-2
(VDE 0105 Part 100) may work on this
device/system.
• Before installation and before touching
the device ensure that you are free of
electrostatic charge.
• The rated value of the mains voltage may
not fluctuate or deviate by more than the
tolerance specified, otherwise malfunction
and hazardous states are to be expected.
• Panel-mount devices may only be operated
when properly installed in the cubicle or
control cabinet.
Moeller GmbH Safety instructions
Warning!
Dangerous electrical voltage!

11/01 AWB2300-1433GB
1
About this manual 3
Target group 3
Abbreviations and symbols 3
1 Motor-protective system ZEV 5
Preface 5
System overview 6
Unit description 8
– Current monitoring sensors 8
– Setting of the tripping CLASS 8
– Thermistor monitoring 10
– Thermistor protection 11
– Short-circuit monitoring of the thermistor circuit 12
–Phasefailure 14
– Earth fault monitoring 14
2 Configuration 15
Monitoring overload of motors in the EEx e area 15
Setup of the overcurrent protection system 15
Approvals 16
3 Installation 17
Notes on installation 17
Mounting the devices 19
– ZEV and ZEV-XSW-25 to 145 19
– ZEV and ZEV-XSW-820 21
– Connections 25
Removing devices 26
– ZEV and DIN rail 26
– Connecting cable 26
Contents

Contents
2
11/01 AWB2300-1433GB
4 Operating the devices 27
Settings 27
Setting up the menus 29
– Setting the operating current 29
– Setting the tripping CLASS 29
– Selecting the reset mode 29
– Setting the earth fault monitor 30
– Assigning the free contacts 30
Display messages 31
– Overload tripping 31
– Thermistor tripping 31
– Earth fault 31
– Phase failure 32
– Current imbalance 32
– Device fault 32
Annex 33
Rating plates 33
– Electronic motor-protective relay ZEV 33
– Current sensors ZEV-XSW-... 33
ZEV tripping curves 35
– 3-phase tripping curve 35
– 2-phase tripping curve 37
Dimensions 38

3
11/01 AWB2300-1433GB
About this manual
This manual applies to the motor-protective system ZEV.
It describes the overload monitoring system for the
protection of motors operating in potentially explosive
atmospheres (EEx e areas).
Target group This manual addresses skilled personnel who install,
commission and service the motor-protective systems.
Abbreviations and
symbols
The abbreviations and symbols used in this manual have the
following meaning:
Xindicates actions to be taken.
CLASS Tripping class of a thermal overload circuit-
breaker
EEx e "Increased safety“ degree of protection
RTT Rated threshold temperature
PTB Physikalisch Technische Bundesanstalt.
German Federal Testing Laboratory: Accredited
certification authority for devices operated in
EEx e areas.
PTC A PTC resistor is a temperature sensor with
positive temperature coefficient
h
hh
hDraws your attention to interesting tips and
supplementary information
Note
Warns of the risk of slight material damage.

About this manual
4
11/01 AWB2300-1433GB
The chapter title in the header on the left side and the title
of the current topic on the right side provide you with a good
overview of this documentation. Exceptions are the starting
pages of the chapters and empty pages at the end of a
chapter.
Warning!
Warns of the risk of heavy material damage and of fatal
injury or even death.

5
11/01 AWB2300-1433GB
1 Motor-protective system ZEV
Preface In addition to the degree of protection specified in the
standards EN 60079-14 and VDE 0165 Part 1, further
provisions have been made to ensure safety from ignition for
motors operated in potentially explosive atmospheres. EN
50019 prescribes additional measures to be taken for the
operation motors with "increased safety" type of protection
"e". These measures improve the degree of safety and
prevent impermissible high temperature and development of
sparking and arcing, which is usually not found when motors
are operated under normal conditions. The motor protective
devices used for this are operated outside of the EEx e area
and must be certified by an accredited certification authority.
The guidelines on the application of Directive 94/9/EC
(ATEX 100a) on the approximation of the laws of the
Member States concerning equipment and protective
systems intended for use in potentially explosive
atmospheres will be enforced as of 06.30.2003.
The motor-protective system ZEV is approved by the PTB
according the 94/9/EC (ATEX 100a) Directives.
h
hh
hNumber of the EU Certificate of Compliance:
PTB 01 ATEX 3233.


Motor-protective system ZEV
6
11/01 AWB2300-1433GB
System overview
Figure 1 : Basic electronic motor-protective relay unit ZEV
aPower supply
bFreely configurable auxiliary switches
cTerminals for connecting an external core-balance transformer
dTerminals for connecting a thermistor
eUp/Down adjusting buttons
fMode selector button
g1 NO + 1 NC contact for overload and thermistor tripping
hGrounding terminal
iReset/Test button
jDisplay
kTerminal for connecting a remote or automatic reset contact
ab
c
d
e
f
g
h
i
j
k

System overview
7
11/01 AWB2300-1433GB
Figure 2: Current sensors
Always use patch cables of the type ZEV-XVK-... to connect
current sensors. These are available in the following lengths
• 200 mm,
• 400 mm,
• 800 mm,
Figure 3: Supplementary external core-balance transformer
SSW... for earth fault monitoring
Auxiliary external core-balance transformers SSW... are used
for earth fault monitoring (asection “Earth fault
monitoring”, Page 14).
ZEV-XSW-25
ZEV-XSW-65
ZEV-XSW-145
ZEV-XSW-820