MICROENER IM30-GLF Manuale utente

IM30-GLF

Doc. N° MO-0062-ING

Rev. 3

Date 14.02.2005

Pag

MULTIFUNCTION MICROPROCESSOR

PROTECTION RELAY

TYPE

IM30-GLF

OPERATION MANUAL

GENERATOR

PROTECTION

RELAY TYPE

IM30-G

ENTER/RESET

MODE

SELECT

PROG.

I2>

PROGR/

I.R.F.

MICROELETTRICA SCIENTIFICA

MILANO ITALY

I>->>

BR.

FAIL.

B.I/

F.D.

IM30-GLF

Doc. N° MO-0062-ING

Rev. 3

Date 14.02.2005

Firmware:

2.0X

Pag

INDEX

1. General utilization and commissioning directions_______________________________________________________ 3

1.1 - Storage and Transportation _______________________________________________________________________ 3

1.2 - Installation ____________________________________________________________________________________ 3

1.3 - Electrical Connection ____________________________________________________________________________ 3

1.4 - Measuring Inputs and Power Supply ________________________________________________________________ 3

1.5 - Outputs Loading________________________________________________________________________________ 3

1.6 - Protection Earthing _____________________________________________________________________________ 3

1.7 - Setting and Calibration___________________________________________________________________________ 3

1.8 - Safety Protection _______________________________________________________________________________ 3

1.9 - Handling______________________________________________________________________________________ 3

1.10 - Maintenance__________________________________________________________________________________ 4

1.11 - Fault Detection And Repair ______________________________________________________________________ 4

2. GENERAL ________________________________________________________________________________________ 4

2.1 - Power Supply__________________________________________________________________________________ 5

2.2 - Measuring input ________________________________________________________________________________ 6

2.2.1 –Phase and ground _______________________________________________________________________________________ 6

2.2.2 –Phase-to-Phase voltage___________________________________________________________________________________ 6

2.2.3 - Phase displacement ______________________________________________________________________________________ 6

2.3 - Algorithms of the different functions_________________________________________________________________7

2.3.1 - Setting range of the reference input quantities__________________________________________________________________ 7

2.3.2 - F50/51 - Dual level 3-phase overcurrent ______________________________________________________________________ 7

2.3.3 - F50/51G - Stator Ground Fault______________________________________________________________________________ 7

2.3.4 - F46 - Current unbalance : Measurement of RMS Negative Sequence Current I2_______________________________________ 8

2.3.5 - F32 - Reverse active power ________________________________________________________________________________ 8

2.3.6 - F21/40 - Directional Underimpedance / Loss of excitation_________________________________________________________ 9

2.4 - Configuration of the output relays (see § 5)__________________________________________________________ 11

3. CONTROLS AND MEASUREMENTS __________________________________________________________________ 12

4. SIGNALIZATIONS _________________________________________________________________________________ 13

5. OUTPUT RELAYS _________________________________________________________________________________ 14

6. SERIAL COMMUNICATION _________________________________________________________________________ 14

7. DIGITAL INPUTS __________________________________________________________________________________ 15

8. TEST ___________________________________________________________________________________________ 15

9. KEYBOARD AND DISPLAY OPERATION ______________________________________________________________ 16

10. READING OF MEASUREMENTS AND RECORDED PARAMETERS ________________________________________ 17

10.1 - ACT.MEAS__________________________________________________________________________________ 17

10.2 - MAX VAL ___________________________________________________________________________________ 17

10.3 - LASTTRIP __________________________________________________________________________________ 18

10.4 - TRIP NUM __________________________________________________________________________________ 18

11. READING OF PROGRAMMED SETTINGS AND RELAY'S CONFIGURATION_________________________________ 18

12. PROGRAMMING _________________________________________________________________________________ 19

12.1 - Programming of Functions Settings_______________________________________________________________ 19

12.2 - Programming the Configuration of Output Relays ____________________________________________________ 20

13. MANUAL TEST OPERATION _______________________________________________________________________ 21

13.1 - Mode "TESTPROG" subprogram "W/O TRIP"_______________________________________________________ 21

13.2 - Mode "TESTPROG" subprogram "WithTRIP" _______________________________________________________ 21

14. MAINTENANCE __________________________________________________________________________________ 21

15. POWER FREQUENCY INSULATION TEST ____________________________________________________________ 21

16. ELECTRICAL CHARACTERISTICS __________________________________________________________________ 22

17. CONNECTION DIAGRAM (SCE1395 Rev.5 - Standard Output)____________________________________________ 23

17.1 - CONNECTION DIAGRAM (SCE1468 Rev.2 - Double Output) __________________________________________ 23

18. WIRING THE SERIAL COMMUNICATION BUS (SCE1309 Rev.0) __________________________________________ 24

19. TIME CURRENT CURVES F51 - IM30-G (TU0311 Rev.0) _________________________________________________ 25

20. I2t = constant element F46 - IM30-G (TU0312 Rev.0) ____________________________________________________ 26

21. DIRECTION FOR PCB'S DRAW-OUT AND PLUG-IN_____________________________________________________ 27

21.1 - Draw-out____________________________________________________________________________________ 27

21.2 - Plug-in _____________________________________________________________________________________ 27

22. MOUNTING _____________________________________________________________________________________ 28

23. KEYBOARD OPERATIONAL DIAGRAM ______________________________________________________________ 29

24. SETTING’S FORM ________________________________________________________________________________ 30

IM30-GLF

Doc. N° MO-0062-ING

Rev. 3

Date 14.02.2005

Firmware:

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Pag

1. General utilization and commissioning directions

Always make reference to the specific description of the product and to the Manufacturer's instruction.

Carefully observe the following warnings.

1.1 - Storage and Transportation

must comply with the environmental conditions stated on the product's instruction or by the applicable

IEC standards.

1.2 - Installation

must be properly made and in compliance with the operational ambient conditions stated by the

Manufacturer.

1.3 - Electrical Connection

must be made strictly according to the wiring diagram supplied with the Product, to its electrical

characteristics and in compliance with the applicable standards particularly with reference to human

safety.

1.4 - Measuring Inputs and Power Supply

carefully check that the value of input quantities and power supply voltage are proper and within the

permissible variation limits.

1.5 - Outputs Loading

must be compatible with their declared performance.

1.6 - Protection Earthing

When earthing is required, carefully check its effectiveness.

1.7 - Setting and Calibration

Carefully check the proper setting of the different functions according to the configuration of the

protected system, the safety regulations and the co-ordination with other equipment.

1.8 - Safety Protection

Carefully check that all safety means are correctly mounted, apply proper seals where required and

periodically check their integrity.

1.9 - Handling

Notwithstanding the highest practicable protection means used in designing M.S. electronic circuits,

the electronic components and semiconductor devices mounted on the modules can be seriously

damaged by electrostatic voltage discharge which can be experienced when handling the modules.

The damage caused by electrostatic discharge may not be immediately apparent but the design

reliability and the long life of the product will have been reduced. The electronic circuits reduced by

M.S. are completely safe from electrostatic discharge (8 KV IEC 255.22.2) when housed in their case;

withdrawing the modules without proper cautions expose them to the risk of damage.

IM30-GLF

Doc. N° MO-0062-ING

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ttf

tt10 

a. Before removing a module, ensure that you are at the same electrostatic potential

as the equipment by touching the case.

b. Handle the module by its front-plate, frame, or edges of the printed circuit board.

Avoid touching the electronic components, printed circuit tracks or connectors.

c. Do not pass the module to any person without first ensuring that you are both at

the same electrostatic potential. Shaking hands achieves equipotential.

d. Place the module on an antistatic surface, or on a conducting surface which is at

the same potential as yourself.

e. Store or transport the module in a conductive bag.

More information on safe working procedures for all electronic equipment can be found

in BS5783 and IEC 147-OF.

1.10 - Maintenance

Make reference to the instruction manual of the Manufacturer; maintenance must be carried-

out by specially trained people and in strict conformity with the safety regulations.

1.11 - Fault Detection And Repair

Internal calibrations and components should not be altered or replaced.

For repair please ask the Manufacturer or its authorised Dealers.

Misapplication of the above warnings and instruction relieves the Manufacturer of any liability.

2. GENERAL

Input currents are supplied to 4 current transformers: - three measuring phase current - one measuring

the earth fault zero-sequence current. Phase current input can be 1 or 5A

For zero-sequence current, taps for 1A and 5A input are provided on relay’s terminal board.

Input phase to phase voltage is supplied to one voltage transformer with rated input

programmable 100-125V.

The Time/current Curves, the algorithms and the ratings are herebelow reported.

This relay is derived from the version IM30-G with the addition of the possibility to work with input

frequency in the range from 5 to 70 Hz taking into account the following limitation:

During the transient operation with frequency “f” different from the nominal one “fn” the functions

programmed with dependent inverse time delay will compute a trip time “tf” different than that “t”

corresponding to the operation at the nominal frequency :

Example : the trip time delay at 10Hz will be five times that corresponding to 50Hz

There fore for low-frequency operation the function I> has to be programmed in the

independent definite time mode F(I>)=D (see § 12).

On the contrary the current unbalance element F46 operates properly even at low-frequency because

the heating of the rotor produced by the negative sequence component is by itself inversely proportional

to the frequency.

IM30-GLF

Doc. N° MO-0062-ING

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Date 14.02.2005

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

The Stator Earth Fault element F64S does not work when the frequency differs from the nominal

value by more than 10% due to the action of its pass-band filter.



The functions F40 (underimpedance = loss of excitation) and F32 (Reverse Power) are

automatically disactivated when frequency is less than 25Hz.



The trip level of the overcurrent element of this version has a different setting range :

I>=(0.2-2.5)Ib. At the end of the generator/motor start-up period, this element is normally

disactivated via the digital input 2 (terminals 1-2 shorted) by programming “ 2=I1..... (see § 12 :

Output relay’s programming).



If has to be taken into account than that the relay computes the RMS values of the input

quantities on each half-cycle whereas the frequency is detected on each full cycle. It is then clear

that the computing time of the RMS values is inversely proportional to the frequency. Any trip time

delay is started as soon as at least one RMS value above the set level has been detected. As

already remarked the dependent time delay are affected by the frequency whereas the

independent time delays are not.

Make electric connection in conformity with the diagram reported on relay's enclosure.

Check that input currents are same as reported on the diagram and on the test certificate.

The auxiliary power is supplied by a built-in interchangeable module fully isolated an self protected.

2.1 - Power Supply

The auxiliary power is supplied by a built-in interchangeable module fully isolated an self protected.

The relay can be fitted with two different types of power supply module :



24V(-20%) / 110V(+15%) a.c.



80V(-20%) / 220V(+15%) a.c.





24V(-20%) / 125V(+20%) d.c.



90V(-20%) / 250V(+20%) d.c.

Before energising the unit check that supply voltage is within the allowed limits.

IM30-GLF

Doc. N° MO-0062-ING

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2.2 - Measuring input

The relay computes the RMS value of current and voltage and the relevant phase displacement.

2.2.1 –Phase and ground

Phase and ground currents are supplied to four current transformers with 5A rated primary.

By movable jumpers on the relay card, the secondary can be switched-on to two different taps to

obtain a relay rated input current In = 5 or 1 Amp (different values can be provided on request).

The measuring dynamics of the C.Ts. runs from 0.001 through 50 times In.

For the phase current the measuring range of the A/D Converters runs from 0 to 13In

automatically switched to two channels one measuring from 0 to 1.3In and the second from 0.1 to

13In. The theoretical accuracy of the measurement is 0.12%In from 0 to 1.3In and 1.3%In from

through 13In.

- 1 = 0.02 M 0.002 In from 0 to 1.2 In

- 2 = 0.02 M 0.02 In from 1.2 to 12 In

For ground current the measuring range of the A/D converter runs from 0 to 2On

The actual absolute error on each measurement M can be:

- 0= 0.02 M 0.004 On

2.2.2 –Phase-to-Phase voltage

Phase-to-phase voltage UAB is supplied to one Potential transformers rated 220V.

Relay’s rated phase-to-phase input voltage (Uns) can be adjusted from 100 through 125V.

The ADC converter measuring range runs up to 2 x Uns.

The theoretical accuracy is 0.2%Uns.

The actual absolute error can be :

- v = 0.02 M 0.003 Uns

2.2.3 - Phase displacement

The relay detects the displacement between the input voltage of phase C and each phase current IA,

IB, IC. The displacement angle are therefore :

A= (IAUAB)+30°; B= (IBUAB)+150°; C= (ICUAB)-90°;

This means that the voltage system is considered to be balanced

as it is normally, where as the currents can be however

unbalanced. (see figure)

Angles are measured anticlockwise from 0° to 360° with

accuracy 2°.

Displacement is not measured if current or voltage are null.

B

C

VAB

A

IM30-GLF

Doc. N° MO-0062-ING

Rev. 3

Date 14.02.2005

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2.3 - Algorithms of the different functions

2.3.1 - Setting range of the reference input quantities



System frequency

Fn = (50-60)Hz



Rated primary current of phase C.Ts.

In = (0-9999)A, step 1A



Rated primary current of ground C:T.

On = (0-9999)A, step 1A



Rated secondary phase-to-phase voltage of P.Ts.

Uns = (100-125)V, step 1V



Relay basic current (Generator’s rated current)

Ib = (0.5-1.1)In, step 0.1In

2.3.2 - F50/51 - Dual level 3-phase overcurrent

F1 - 50/51 : Low set overcurrent



Pick-up (operation) level

Setting I> = Dis blocks function’s operation

I> = (1-2.5)Ib, step 0.01Ib



Drop-out ratio

0.95



Minimum operation time of instantaneous output

30ms



Trip time delay in the definite time operation mode F(I>) = D

t = tI> = (0.05-30)s, step 0.01s



Trip time delay in the inverse time operation mode F(I>) = SI

1)(I/I tI0.033

t0.02 





(tI> = trip time delay at I/I> = 5)

(see curves TU0311 Attachment. B)

F2 50/51 : High set overcurrent



Pick-up (operation) level

Setting I>> = Dis blocks function’s operation

I>> = (1-12)Ib, step 0.1Ib



Drop-out ratio

0.95



Minimum operation time of the instantaneous element

30ms



Independent trip time delay

t = tI>> = (0.05-3)s, step 0.01s

2.3.3 - F50/51G - Stator Ground Fault



Pick-up (operation) level

Setting O> = Dis. blocks function’s operation

O> = (0.02-0.4)On, step 0.01On



Drop-out ratio

0.95



Minimum operation time of the instantaneous element

30ms



Independent trips time delay

t = tO> = (0.05-30)s, step 0.01s

IM30-GLF

Doc. N° MO-0062-ING

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2.3.4 - F46 - Current unbalance : Measurement of RMS Negative Sequence Current I2

F1 46 : I22 t = K (adiabatic heating)



Generator’s continuous I2rating

Setting 1Is = Dis blocks function’s operation

1Is = (0.05-0.5)Ib, step 0.01Ib



Time multiplier

Ks = (5-80)s, step 1s

Trip time when I2= Ib



Trip time delay

h)/I(IKs

t

Heat accumulation only operates if I2[1Is]



Cooling time from trip level to the status corresponding to

the operation at I2=[1Is]

tc = (10-1800)s, step 1s

Cooling time

[tc]

l















: tl= [tc] when

Kst

2













Cooling only takes places if

1Is

2

(see curves TU0312 Attachment. B)

F2 46 : Alarm



Alarm level

Setting 2Is = Dis blocks function’s operation

2Is = (0.03-1)Ib, step 0.01Ib



Independent trip time delay

t2Is = (1-100)s, step 1s

2.3.5 - F32 - Reverse active power



Active current setting range

Setting Ir> = Dis blocks function’s operation

Ir> = (0.02-0.2)In, step 0.01In



Operation level

= Ic cos (c-180°) [Ir]



Independent trip time delay

tIr> = (0.1-60)s, step 0.1s



Operation zone

(-90°+180°)<c<(90°+180°)

IM30-GLF

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2.3.6 - F21/40 - Directional Underimpedance / Loss of excitation

The relay computes the impedance

)cos(I E

Z







Characteristics angle of the impedance = (0°-330°), step 30°

Setting of impedance

angle

Max sensitivity current

angle

Current components



0°



0°

(360°)

Forward Resistive



330°

R+C



+30°

Forward Resistive + Forward Capacitive



300°

R+C



+60°

Forward Resistive + Forward Capacitive



270°



+90°

Forward Capacitive (Loss of Field)



240°

C-R



+120°

Forward Capacitive + Reverse Resistive



210°

C-R



+150°

Forward Capacitive + Reverse Resistive



180°

-R



+180°

Reverse Resistive



150°

R-R



+210°

(-150°)

Forward Inductive + Reverse Resistive



120°

L-R



+240°

(-120°)

Forward Inductive + Reverse Resistive



90°



+270°

(-90°)

Forward Inductive



60°

L+R



+300°

(-60°)

Forward Inductive + Forward Resistive



30°

L+R



+330°

(-30°)

Forward Inductive + Forward Resistive

The direction is that of the axle where the center of the circle is located.

N.B. By definition the relation between current displacement and impedance displacement is :

= 360°- 

Angles are counted anticlockwise from 0° (real axis = direction of phase-to-neutral voltage E)

through 360°.

For example : the displacement of a totally capacitive current is = 90°; the angle of a totally

capacitive impedance is = 270°. (see figure)

Operation zone is that included in the circle having (see figure) :

Center on the axle displaced by at distance

K2 

from the origin Diameter = K1

Circle offset : K2 = (5-50)%Zb, step 1%

Circle diameter : K1 = (50-300)%Zb, step 1%

Setting K1 = Dis blocks the function’s operation



Ib3

Uns

Zb 

IM30-GLF

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Independent trip time delay : tz = (0.2-60)s, step 0.1s

Integration time : ti = (0-10)s, step 0.1s

In case of impedance oscillation reset of the timer tz only takes place if Z remains outside

the trip area for at least [ti].

Undervoltage inhibition level : Ex<0.3

Uns

Undercurrent inhibition level : Ix<0.2Ib

Testing :

For testing the Field loss protection operate as follows :

Impedance characteristic angle set to Z= 270° capacitive

(this corresponds to current leading voltage by 90°).

Circle off-set to any value (recommended value for testing K2 = 50%)

Circle diameter to any value (recommended value for testing K1 = 200%)

Time delay tz to any value (recommended value for testing tz = 0.2s)

Using a single phase apparatus

Voltage input at rated value to terminals 32-33

Current input to phase A terminals 25-26

Phase displacement of input current on input voltage = 90° (current leading voltage)

See attached table.

The trip area is that inside the circle

nI3

Z

we can individuate the two intersection

point between circle and the impedance axle when the impedance values are :

ZA = K2%Zb; ZB = (K1+K2)%Zb

If input = Uns the currents corresponding to ZA and ZB are :

AK100Ib3

I

;

BK+K 100Ib3

I

with Ib = 2A, K1 = 200%, K2 = 50% currents are

6,93A2)3(2IA 

;

1,39A2)3(0,4IB 

Trip must take place for : 1,39A<I<6,93A

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