spem 1a gb 97-09

8/3/2019 SPEM 1A GB 97-09

1/12

Technical Brochure

Brochure SPEM 1 A GB 97-09

Low Voltage Apparatus

ABB Control Oy

Motor Protection RelaySPEM

8/3/2019 SPEM 1A GB 97-09

2/122 ABB Control Oy

Motor Protection Relay SPEM

1) In the following cases please contact the manufacturer:- Frequency Converters- Star-Delta Starters- Soft Starters- Power Factor Correction Banks (PFC)

ApplicationsThe SPEM relay is the ideal answer to problems requiringmore versatile or accurate protection for a motor than canbe offered by a standard thermal overload relay.SPEM relays can be used for protecting low voltagesquirrel cage (AC) motors 1).

Use of SPEM motor protection relay:- helps in extending life time of motor- helps in optimizing motor size- helps in planning maintenance work- protects the drive from mechanical damage

TCM - Thermal Capacity Memory

The SPEM relay is based on microprosessor techniqueswith a built in logic supervising thermal behaviour of motor.

The thermal capacity memory monitors the motor currentand continuously compares the data to the known thermalrecord of the motor, and operates when the thermal limit ofthe motor is exceeded.

The microprosessor based construction ensures long timestability, high accuracy and disturbance free operation.

The compact size enables installation in cramped places.

Protection

SPEM offers protection in the following ways: Thermal Overload Protection with complete

Thermal Capacity Memory (TCM) Start-up Current Protection Under Current Protection Unbalance Protection

- phase unbalance- phase failure- incorrect phase sequence

Earth Fault Protection Self Supervision Fail Safe Operation

In designing the SPEM motor protection relay the principle aim has not onlybeen to fully protect the motor, but also to reduce down time to a minimum.

S00789A

S00790A

EMC-testedTested according to EMC-directive No: 89/336/EEC.

8/3/2019 SPEM 1A GB 97-09

3/12ABB Control Oy 3

Thermal Overload Protection

Provides reliable protection formotor starting as well as for heavyand repeated starting.

1s3 421

I / I ~5 6

10s

5s

3s2s

40s30s20s

1min

2min

3min

5min

10min

20min

30min

1h

2h

3htime

0

1.05s

t6x

5s

2s

30s20s

10s

S00782A

Thermal tripping characteristics:

1s3 421

I / I ~5 6

10s

5s

3s2s

40s30s20s

1min

2min

3min

5min

10min

20min

30min

1h

2h

3htime

0

1.05

t6x

5s

2s

30s

20s

10s

S00783A

Without prior load (Cold curve)

Cooling time-constant = 4 x the heatingtime-constant.

With prior load 0.9 x I

(Hot curve)

100% Tripping

Thermalcapacity

1)2)

3)

S00793A

The microprosessor is continuously calculating thethermal capacity available in the motor:

1) starting2) overloading3) stand still (even after tripping)

Tripping takes place, when the thermal capacity ofmotor is exceeded i.e. motor current is higher than1.05 x full load current I

. Refer to the thermal

tripping characteristics below.

I

tS00792A

8/3/2019 SPEM 1A GB 97-09


S00781A

Start-Up Current Protection

The relay trips if the thermalcapacity of motor is exceededduring starting. The tripping curveis defined by the preset maximumstarting time (t

6time). In the hot

state SPEMs TCM takes intoaccount also the thermal historyof the motor during starting.

The maximum motor starting times are available fromthe motor manufacturers. If the preset maximumstarting time exceeds 1.7 x the real motor starting time,SPEM allows two starts in the cold state and one in thehot state.

Thermalcapacity

Restart inhibit

t

100%

40%

S00794A

After tripping, if there is less than 60 % ofmotor capacity available, SPEM does notallow a new start until the motor cools down(restart inhibit). In this case, a new start ispossible approximately after 30 s.

Unbalance Protection

Provides protection against:1. Phase unbalance2. Phase failure3. Incorrect phase sequence

Under Current ProtectionProvides protection against asudden loss of loads e.g.

Dry running pumps Broken conveyer belts

This feature can be selected by means of switch S2(I OFF/ON) on the front panel of the SPEM relay(see page 6).

% Full load current

55

100

90

80

70

60

50

40

30

2010

0

12

S00786A

Typical off load currentfor large and mediumsized motors.

S00797A

Tripping is activated if the currentstays between 12...55 % of fullload current (I

) longer than 10 s.

8/3/2019 SPEM 1A GB 97-09


Earth Fault Protection(SPEM40_ and SPEM50_ types)

Provides an indication of a defect

in motor winding. Motor canremain in operation if necessaryfrom process point of view.

The maintenance of the motor canbe postponed to an appropriatetime.

A

S00788A

Unbalance percentage

(%)

t(s)

00 10 20 30 40 50

10

20

30S00796AIn case of complete phase failure or incorrect

phase sequence, the tripping time is 6 s.Otherwise according to the curve shown.

By means of switch S3 (I0

/ TRIP) on the front panelof SPEM, it is possible to select either tripping andsignalling or only signalling in case of earth faultfailure.

If only signalling is selected, there will be no tripping ofthe SPEM relay but the signalling contact (9-10) of therelay operates.

In case a tripping function is selected and the SPEMrelay has tripped, it will be automatically reset after200 ms when automatic reset is selected from switchS1 (Reset A/M).

Time lag 1 second for eliminating short time failures.

The tripping level for the earth fault current can be setwith the potentiometer I

0/I

non the front panel of the

SPEM relay.

Self SupervisionThe functions of the electronic circuits are continuouslysupervised by means of a hardware watchdog.

In case of an internal fault, contact 9-10 closes givingan alarm and contact 11 - 12 remains in its positionkeeping the motor circuit closed, and enablingcontinuation of the process.

Fail Safe OperationIn case of loss of external auxiliary voltage, the motorprotection relay trips and can be taken into operationafter reconnection of the auxiliary voltage.

After reconnection of auxiliary voltage supply, theSPEM considers the situation as 75 % of the thermalcapacity of motor would have been used.

Every time when the auxiliary voltage will beconnected, contact 9 - 10 closes for a short period oftime (10 ms) giving an OK signal e.g. to PLC.

The time-lag of the unbalance/singlephasing unit.

8/3/2019 SPEM 1A GB 97-09


Presetting

t6

time

Adjustability from 2 s to 30 s. Informationfrom motor manufactures.

Switches S1...S8

S1Automatic or manual resettingThe SPEM is always automatically reset, whentripping takes place caused by thermal overload orstart-up current protection. Otherwise either manualor automatic resetting.Manual resetting by operating S1 from manualposition to automatic position and back to manualposition.

S2Undercurrent protection OFF/ONWhether underload protection is required or not

S3Alarm/trip from earth faultSelection of alarm or tripping and alarm.

S4...S8Full load current (I

) preset.Operation of dipswitches to ON-position by movingto the right.

Selectable from 60 % up to 122 % with accuracy of 1 %.

Steps are: 60 % (fixed)32 %16 %

8 %4 %2 %

Earth fault

(SPEM40_ and SPEM50_ types).Adjustability from 20 % to 60 % of ratedzero sequence (SPEM40_) or residual(SPEM50_) current.See table on the page 8.

SPEM

12

11OK

I

I~

Reset A/M

I< OFF / ON

Io / Trip

2

4

8

16

32

I =+60

[% In]

t x (s)

I /I

0~

0n0

0

610 20

2 30

0.3

0.4

0.2 0.6

MADE IN FINLAND

0.5

MOTOR PROTECTION RELAY

Setting of full load current preset in percentage (I

%) andadjustement of current transfomers.

The functions (except earth fault protection) arebased on full load current, which is the maximumallowed continuous on load current of the motor. Thepresets, in percent, can be calculated from thefollowing formula:

II

% = x 100%ICT

I

% = full load current preset in percentageI

= maximum allowed continous onload current = full load current

ICT

= rated primary current of current transformer

Example:ABB motor M2BA 315 SMC 4B3

Pn

= 160 kW, In

= 282 A,400 V used with 5 % overload allowedby themanufacturerFull load current:

I = 282 A x 1.05 = 296 ASPEM type selected from the table on page 9SPEM40B310 (with earth fault protection)

setting value:296 A

I

= x 100% = 95 %310 A

Select switches S8 and S4. Fixed 60% no need toselect.(60 + 32 + 2) % = 94 % < 95 %The t

6time for the motor:

M2BA 315 SMC 4B3 is 15 s

(information from motor manufacturer)

8/3/2019 SPEM 1A GB 97-09


When the relay is reset (manually or automatically),the OK LED lights again. Failure indications go out,when the motor is restarted.

Indicates when relay permits starting(steady yellow light)

Front Panel Indicators

Failure indications:When there is a failure, the relay trips and the yellowOK LED goes out and the correspondant red LEDfailure indication shows.

Tripping caused by:

Thermal overload, start-up current Steady red light on the middle LED Always automatically reset The tripped indication cancels when the motor

is restarted

Phase unbalance Irregular red flash of the middle LED Automatic or manual reset The tripped indication cancels when the motor

is restarted

Under current Steady red flash of the middle LED Automatic or manual reset The tripped indication cancels when the motor

is restartedEarth fault

Steady red light on the lower LED Automatic or manual reset The earth fault indication cancels when the motor is

restarted or if the fault disappears

SPEM

12

11OK

I

I~

Reset A/M

I< OFF / ON

Io / Trip

2

4

8

16

32

I =+60

[% In]

t x (s)

I /I

0~

0n0

0

610 20

2 30

0.3

0.4

0.2 0.6

MADE IN FINLAND

0.5

MOTOR PROTECTION RELAY

SPEM function chartPROTECTION PRESETTING INDICATION FUNCTION RESETTING

Tripping Alarm Automatic Manual

THERMAL I

% S4...S8 Steady Middle

OVERLOAD light LED x x x -

- overload Upper

- start-up current t6/ s potentiom.

UNDER CURRENT OFF/ON S2 Steady Middle x x x x

I

% (S4...S8) flash LED

UNBALANCE I

% (S4...S8) Irregular Middle x x x x

flash LED

- phase interrupt

- single phase

- incorrect phase

sequence

EARTH FAULT I0/ I

nLower Steady Lower

% potentiom. light LED

Alarm S3 - x - x

Trip S3 x x x x

SELFSUPERVISION - - - - - x Self Self

Internal fault resetting resetting

FAIL SAFE Upper

OPERATION - - "OK" OFF LED x - - -

Failure of

auxiliary voltage

8/3/2019 SPEM 1A GB 97-09

8/12

8/3/2019 SPEM 1A GB 97-09


Motor Protection Relay SPEMOrdering Information

Supply voltage 110 V 50...60 Hz. Current transformer included.

Type Rated Rated current Maximum Earth fault protection Orderingcurrent I

nrange I

nsetting Rated zero Rated residual Number

[A][A] of I

/[%] sequence current

current I0n/[A] I

0n/[A]

SPEM30C060 60 4.5...63 106 - -

SPEM30C105 105 63...111 106 - -

SPEM30C185 185 111...186 102 - -

SPEM30C310 310 186...310 100 - -

SPEM30C400 400 240...400 100 - -

SPEM30C500 500 300...500 100 - -

SPEM40C060 60 4.5...63 106 60 -

SPEM40C105 105 63...111 106 105 -

SPEM40C185 185 111...186 102 185 -

SPEM40C310 310 186...310 100 310 -

SPEM40C400 400 240...400 100 400 -

SPEM40C500 500 300...500 100 500 -

SPEM50C060 60 4.5...63 106 - 1

SPEM50C105 105 63...111 106 - 1

SPEM50C185 185 111...186 102 - 1

SPEM50C310 310 186...310 100 - 1

SPEM50C400 400 240...400 100 - 1

SPEM50C500 500 300...500 100 - 1

Motor Protection Relays SPEM

Supply voltage 230 V 50...60 Hz. Current transformer included.

Type Rated Rated current Maximum Earth fault protection Orderingcurrent I

nrange I

nsetting Rated zero Rated residual Number

[A][A] of I

/[%] sequence current

current I0n/[A] I

0n/[A]

SPEM30B060 60 4.5...63 106 - -

SPEM30B105 105 63...111 106 - -

SPEM30B185 185 111...186 102 - -

SPEM30B310 310 186...310 100 - -

SPEM30B400 400 240...400 100 - -

SPEM30B500 500 300...500 100 - -

SPEM40B060 60 4.5...63 106 60 -

SPEM40B105 105 63...111 106 105 -

SPEM40B185 185 111...186 102 185 -

SPEM40B310 310 186...310 100 310 -

SPEM40B400 400 240...400 100 400 -

SPEM40B500 500 300...500 100 500 -

SPEM50B060 60 4.5...63 106 - 1

SPEM50B105 105 63...111 106 - 1

SPEM50B185 185 111...186 102 - 1

SPEM50B310 310 186...310 100 - 1

SPEM50B400 400 240...400 100 - 1

SPEM50B500 500 300...500 100 - 1

S00789A

S00790A

The connection cable between SPEM and current transformer can be shortened but not madelonger. Cable length appr. 75 cm.

1SCA022388R3210

1SCA022388R5090

1SCA022388R5170

1SCA022388R5250

1SCA022388R5330

1SCA022388R5410

1SCA022388R6140

1SCA022388R6220

1SCA022388R6310

1SCA022388R6490

1SCA022388R6570

1SCA022388R6650

1SCA022388R6730

1SCA022388R6810

1SCA022388R6900

1SCA022388R7030

1SCA022388R7110

1SCA022388R7200

1SCA022388R5500

1SCA022388R5680

1SCA022388R5760

1SCA022388R5840

1SCA022388R5920

1SCA022388R6060

1SCA022388R7380

1SCA022388R7460

1SCA022388R7540

1SCA022388R7620

1SCA022388R7710

1SCA022388R7890

1SCA022388R7970

1SCA022388R8010

1SCA022388R8190

1SCA022388R8270

1SCA022388R8350

1SCA022388R8430

8/3/2019 SPEM 1A GB 97-09


Motor Protection Relays SPEMConnection Diagrams

Primary windings for lower rated currents

Only for types SPEM_060

Current range In

Turns around Max. setting[A] current transformer of I

/[%]

[turns]

4.5 ... 7.5 8 100

7.2 ... 12.0 5 100

12.0 ... 20.0 3 100

18.0 ... 36.0 2 120

36.0 ... 63.6 1 106

1pc 2pc 3pc

S00787A

8/3/2019 SPEM 1A GB 97-09


Motor Protection Relays SPEMConnection Diagrams

Connection diagram with a separate residual current transformer

Direct On Line Starters

F1

1

2

L1

F2

3

4

L2

F3

5

6

L3

K1

M

3 ~

M1U1

V1

W1

V2

U2 W2

7

8

9

101

1

12

SPEM

TRIP

SIGNAL

UauxA

B

C

DE

F

T1

T2

T3

S1

S2S1

S2

S1

S2

F4

L1

21

22

S1

O

13

14

A1

A2K1

13

14

I K1

S2

N

S00785A

H2H1 1

2

1

2

F1

1

2

L1

F2

3

4

L2

F3

5

6

L3

K1

M3 ~

M1U1

V1

W1

V2

U2 W2

7

8

9

10

11

12

SPEM

TRIP

SIGNAL

Uaux

T1

T2

T3

S1

S2S1

S2

S1

S2

F4

L1

21

22

S1

O

13

14

A1

A2K1

13

14

I K1

S2

N

H1 H21 1

2 2

S00784A

A

B

C

D

E

F

8/3/2019 SPEM 1A GB 97-09

12/12

SYSTEM

QUALITY

CERTIFIEDSFS

ISO 9001

CERT

IFIED

ENVIR

ONMENTA

LSYSTEM

SFSISO 14001

ISO 9001

ABB Control OyP.O. Box 622FIN - 65101 VAASA

Finland

Tel +358 10 22 4000Fax +358 10 22 45708

Motor Protection Relays SPEMDimensionDrawings

SPEM _60...400 SPEM_500

82 82

245

82

42

203

111

44

22

6080

100

O7

SPEM

12

11

OK

I I

~

ResetA/M

I

spem 1a gb 97-09

Documents