Eaton Moeller ZEV Series Service-Handbuch

Moeller GmbH

Industrieautomation

Hein-Moeller-Straße 7–11

D-53115 Bonn

E-Mail: info@moeller.net

Internet: www.moeller.net

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

Author: Klaus Grül

Editor: Heidrun Riege

Translator: Harold Schierbaum

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)

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

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

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

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

hDraws your attention to interesting tips and

supplementary information

Note

Warns of the risk of slight material damage.

About this manual

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.

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.

hNumber of the EU Certificate of Compliance:

PTB 01 ATEX 3233.



Motor-protective system ZEV

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

System overview

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

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