Moeller. Wiring manual. Automation and Power distribution

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Moeller Wiring Manual 02/05

9-1

Specifications, Formulae, Tables

Page

Marking of electrical

equipment 9-2

Circuit symbols, European – North America 9-14

Circuit diagram example to

North American specifications 9-27

Approval authorities worldwide 9-28

Test authorities and approval stamps 9-32

Protective measures 9-34

Overcurrent protection of cables and

conductors 9-43

Electrical equipment of machines 9-51

Measures for risk reduction 9-56

Measures for risk avoidance 9-57

Degrees of protection for electrical equipment 9-58

North American classifications for

control switches 9-68

Utilisation categories for contactors 9-70

Utilisation categories for

switch-disconnectors 9-74

Rated motor currents 9-77

Conductors 9-81

Formulae 9-90

International unit system 9-94

Moeller Wiring Manual 02/05

9-2

Specifications, Formulae, Tables

Marking of electrical equipment

General

Extracts from the DIN Standards with VDE

Classification are quoted with the permission of

the DIN (Deutsches Institut für Normung e.V.) and

the VDE (Verband der Elektrotechnik Elektronik

Informationstechnik e.V.) It is imperative for the

use of the standards that the issue with the latest

date is used. These are available from

VDE-VERLAG GMBH, Bismarckstr. 33, 10625

Berlin and Beuth Verlag GmbH, Burggrafenstr. 6,

10787 Berlin.

Marking to DIN EN 61346-2:2000-12

(IEC 61346-2:2000)

Moeller has decided, with a transitional period, to

use the above mentioned standards.

Deviation from the, up to now, normal marking

determines now in the first place the function of

the electrical equipment in the respective circuit of

the code letter. The outcome is that there is a lot

of freedom in the selection of the code letters.

Example for a resistance

• Normal current limiter: R

• Heater resistor: E

• Measurement resistor: B

As well as that, Moeller specific decisions have

been made with regard to the interpretation of the

standard that sometimes deviate from the

standard.

• The marking of connection terminals are not

readable from the right.

• A second code letter for the marking of the use

of the equipment is not given,

e. g.: timer relay K1T becomes K1.

• Circuit-breakers with the main function of

protection are still marked with Q.

They are numbered from 1 to 10 from the top

left.

• Contactors are newly marked with Q and

numbered from 11 to nn.

e. g.: K91M becomes Q21.

• Relays remain K and are numbered from 1 to n.

The marking appears in a suitable position as

close as possible to the circuit symbol. The

marking forms the link between the equipment in

the installations and the various circuit documents

(wiring diagrams, parts lists, circuit diagrams,

instructions). For simpler maintenance, the

complete marking or part of it, can be affixed on

or near to the equipment.

Selected equipment with a comparison of the

Moeller used code letters old – new a Table,

Page 9-3.

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-3

Code letter old Example for electrical equipment Code letter new

B Measuring transducer T

Capacitors C

Memory device C

Electro filter V

Bimetal release F

Pressure monitor B

Fuses (fine, HH, signal fuse ) F

Frequency inverters T

Generators G

Soft starter T

UPS G

Lamps E

Optical and acoustic indicators P

Signal lamps P

Relays K

Contactor relays K

Semiconductor contactor T

Contactor Q

Time-delay relay K

Reactor coil R

Buffer amplifier, inverting amplifier T

Switch disconnector Q

Circuit-breaker for protection Q

Motor-protective circuit-breaker Q

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-4

Q Star-delta switches Q

Disconnect switch Q

Variable resistor R

Measurement resistor B

Heating resistor E

Control circuit devices S

Push-button S

Position switch B

Potential transformer T

Current transformer T

Transformers T

Frequency converter T

Diodes R

Rectifier T

Transistors K

EMC filter K

Suppressors and arc quenching devices F

Code letter old

Example for electrical equipment Code letter new

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-5

Component marking in the USA and Canada to NEMA ICS 1-2001, ICS 1.1-1984,

ICS 1.3-1986

In order to differentiate between devices with

similar functions, 3 figures and/or letters can be

added to the marking. When using two or more of

these markings, the function marking is usually

put first.

Example:

The relay which introduces the first jog function is

marked with “1 JCR”. That means here:

1 = numerical specification

J = jog function of the equipment

CR = control relay (contactor relay) – type of

equipment

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-6

Component or function code letters to NEMA ICS 1-2001, ICS 1.1-1984, ICS 1.3-1986

Code letter

Device or Function

Accelerating

Ammeter

Braking

C or CAP

Capacitor, capacitance

CB Circuit-breaker

Control relay

CT Current transformer

Demand meter

D Diode

DS or DISC

Disconnect switch

DB Dynamic braking

Field accelerating

FC Field contactor

Field decelerating

FL Field-loss

F or FWD

Forward

FM Frequency meter

Fuse

Ground protective

Hoist

Jog

Limit switch

Lower

M Main contactor

MCR

Master control relay

Master switch

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-7

OC Overcurrent

Overload

P Plugging, potentiometer

PFM

Power factor meter

PB Pushbutton

Pressure switch

REC Rectifier

R or RES

Resistor, resistance

REV Reverse

Rheostat

SS Selector switch

SCR

Silicon controlled rectifier

SV Solenoid valve

Squirrel cage

S Starting contactor

Suppressor

TACH Tachometer generator

Terminal block, board

TR Time-delay relay

Transistor

Undervoltage

Voltmeter

WHM Watthour meter

Wattmeter

X Reactor, reactance

Code letter

Device or Function

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-8

As an alternative to device designation with code

letter to NEMA ICS 1-2001, ICS 1.1-1984,

ICS 1.3-1986 the designation to class designation

is permissible. Class designation marking should

simplify harmonization with international

standards. The code letters used here are, in part,

similar to those of IEC 61346-1 (1996-03).

Class designation code letter to NEMA ICS 19-2002

Code letter

Device or function

Separate Assembly

Induction Machine, Squirrel Cage

Induction Motor

Synchro, General

• Control transformer

• Control transmitter

• Control Receiver

• Differential Receiver

• Differential Transmitter

•Receiver

• Torque Receiver

• Torque Transmitter

Synchronous Motor

Wound-Rotor Induction Motor or

Induction Frequency Convertor

Battery

Capacitor

• Capacitor, General

•Polarized Capacitor

Shielded Capacitor

Circuit-Breaker (all)

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-9

D, CR Diode

• Bidirectional Breakdown Diode

• Full Wave Bridge Rectifier

• Metallic Rectifier

• Semiconductor Photosensitive

•Cell

• Semiconductor Rectifier

• Tunnel Diode

• Unidirectional Breakdown Diode

D, VR Zener Diode

Annunciator

Light Emitting Diode

Lamp

•Fluorescent Lamp

• Incandescent Lamp

• Indicating Lamp

E Armature (Commutor and Brushes)

Lightning Arrester

Contact

• Electrical Contact

• Fixed Contact

• Momentary Contact

Core

•Magnetic Core

Horn Gap

Permanent Magnet

Terminal

Not Connected Conductor

Code letter

Device or function

Specifications, Formulae, Tables

Marking of electrical equipment

Moeller Wiring Manual 02/05

9-10

F Fuse

Rotary Amplifier (all)

A.C. Generator

Induction Machine, Squirrel Cage

Induction Generator

Thermal Element Actuating Device

Female Disconnecting Device

Female Receptacle

Contactor, Relay

Coil

• Blowout Coil

•Brake Coil

• Operating Coil

Field

•Commutating Field

• Compensating Field

• Generator or Motor Field

• Separately Excited Field

•Series Field

• Shunt Field

Inductor

Saturable Core Reactor

Winding, General

Audible Signal Device

•Bell

• Buzzer

•Horn

M Meter, Instrument

Code letter

Device or function