ALSTOM Symbols and Signs On Electr Diagrams IEC - ANSI [PDF]

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/ G:\ALSTOM\EM\ATT00 1AHA027592 Symbols and Signs IEC_ANSI.doc

SYMBOLS AND SIGNS ON ELECTRICAL DIAGRAMS

1

OBJECTIVES This document is a collection the symbols and the signs on electrical diagrams. The illustrated examples present the most used "Typicals" witch are in accordance with standardised single line diagrams, ANSI Requirements and IEC Requirements.

We reserve all rights in this document and the information contained therein. Reproduction, use or disclosure to third parties without express authority is stricli forbidden. © ALSTOM (Switzerland) Ltd. 2002

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SYMBOLS AND SIGNS ANSI IEC

ANSI IEC X

X

MINIATURE CIRCUIT BREAKER

TWO WINDING TRANSFORMER X

X

X

X

CONTACTOR WITH FUSE

THREE WINDING TRANSFORMER

X

X

X

GROUND SWITCH

X

GENERATOR G 3

X

X

X DIESEL GENERATOR

SURGE ARRESTER X

G

M

X

EARTHING SWITCH

MOTOR ZERO SEQUENCE CURRENT TRANSFORMER

X

X

X

X

CAPACITOR X

X

X

X

CIRCUIT BREAKER WITH THERMAL AND MAGNETIC PROTECTION

CURRENT TRANSFORMER X

X

X

EARTHING FACILITY

X

SWITCH DISCONNECTOR (LOAD BREAK SWITCH)

X

TWO WINDING VOLTAGE TRANSFORMER X

GROUND

X

X

X

EARTH

THREE WINDING VOLTAGE TRANSFORMER X

BATTERY

X

X

BUSBAR BRANCH

X

X

DIODE

X

X

NEUTRAL POINT

X

X

RESISTOR

X

X

TURBINE WITH COUPLING

X

X

X

FUSE X

X

MAIN CIRCUIT BREAKER X

X

RELAY X

X

CIRCUIT BREAKER, WITHDRAWABLE X

X

CABLE CONNECTION

X

X

LIMIT OF SUPPLY

X

X

DISCONNECTOR X

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ANSI

REGULATOR WITH THYRISTORS

STATIC TRANSFER SWITCH WITH MANUAL BYPASS FOR UPS

X

X

IEC

X

METERING WITH PULSE GENERATOR X

=

UNIVERSAL TRANSDUCER

X

X

=

AC/DC CONVERTER

X

X

~

DC/AC CONVERTER

X

X

X

PROTECTION FUNCTION

X

MW

AS

DISPLAYED ON EGATROL

AMMETER SWITCH

X

X

X

GT ST M MWh

GAS TURBINE STEAM TURBINE MOTOR MEGAWATT HOUR

MW Mvarh

MEGA WATT MEGA VAR HOUR

Mvar VS V I A PF F

MEGA VAR VOLTMETER SWITCH VOLT CURRENT AMPERE POWER FACTOR FREQUENCY

E FT AT MT

ELECTRICALLY OPERATED FAST TRANSFER AUTO TRANSFER MANUAL TRANSFER

AC DC MCC NO NC

ALTERNATING CURRENT DIRECT CURRENT MOTOR CONTROL CENTER NORMALY OPEN NORMALY CLOSED

ACC WCT

AIR COOLED CONDENSER WATER COOLING TOWER

L

LOCAL OPERATED

R

REMOTE OPERATED

D

AUTOMATICALLY OPERATED FROM SSD CONTROL

R

REMOTE OPERATED, NOT FROM DCS

TC TV

CURRENT TRANSDUCER VOLTAGE TRANSDUCER

X

VOLTMETER SWITCH

X

X

V

VOLT METER

X

X

A

AMPERE METER

X

X

X

X

X

X

X

X

VS

LEGEND:

X

X

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ON-LOAD TAP CHANGER

CURRENT TRANSDUCER

PRE-SET ADJUSTMENT (OFFCIRCUIT TAP CHANGER)

4

TRANSFORMER WITH FOUR TAPPINGS (MAIN TAPPING NOT INCLUDED)

CLOCK WISE PHASE

LAGING (e.g. 0)

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PROTECTION FUNCTION CODES

Generator ..MKA10 Minimal impedance Saturation V/HZ Reverse power Reverse power Loss of excitation Step 1 Loss of excitation Step 2 Inadvertent GCB closing Negative sequence alarm Negative sequence trip Stator winding temperature Voltage restraint O/C Overvoltage max. 1 Overvoltage max. 2 95% stator ground/earth fault Voltage balance Rotor earth fault protection 100% stator ground/earth fault Pole slip Under frequency: alarm Under frequency: trip Under frequency: trip Generator differential Breaker failure Synchronizing device

ANSI

IEC

21 24 32.1 32.2 40.1 40.2 41/51 46.1 46.2 49G 51V 59.1 59.2 59GN 60 64F 64GN 78 81.1 81.2 81.3 87G B.F. 25

Z< φ> -P(L1)> -P(L3)> δ >90° δ >90° I2 > I2 >> TG > I> U< U> U >> U0 > ∆U I0 > U0 >

59NB.1 59NB.2

U0 > U0 >>

27 59 79BVM

U< U>

f< f I >> I0 >/t> or I>

Overcurrent definite time

51T

I >/T> or I >

Pressure switch (Buchholz relay) Pressure relief device Tap changer Pressure witch Oil level Transformer differential

63T 63TP 63TC 71T 87T

P> P> P> L< I d>

Oil temperature Winding Temperature Overcurrent inst. time Ground/Earth fault definite time

26SST 49SST 50T1 51NT1

T°C > T°C > I >> I0 >/t> or I>

Overcurrent definite time

51T1

I >/t> or I >

Transformer differential

87T1

I d>

Oil temperature Winding Temperature Overcurrent inst. time Ground/Earth fault definite time

26SST 49SST 50T2 51NT2

T°C > T°C > I >> I0 >/t> or I>

Overcurrent definite time

51T2

I >/t> or I >

Transformer differential

87T2

I d>

26AT 94AT

T°C > T°C >

50ET 49ET

I >> I d>

27 51 59 59NS 59NGS

U< I> U> U0 > U0 >

Transformer T1 = SST (..BBT10 or ..BBT20 or ..BPT10)

Transformer T2 (..BBT20)

Auxiliary Transformer (..BFT..) Oil temperature Tranformer protection

Excitation Transformer (..MKC50..) Overcurrent inst. time Overload

Static Starting Device (SSD ..BPA..) Undervoltage Overcurrent Overvoltage Ground/Earth fault Generator and SSD ground/earth fault

We reserve all rights in this document and the information contained therein. Reproduction, use or disclosure to third parties without express authority is stricli forbidden. © ALSTOM (Switzerland) Ltd. 2002