MICROENER IM30-BY Manual de usuario

IM30-BY

Doc. N° MO-0024-ING

Rev. 1

Date 08.03.2004

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TRIPLE SINGLE PHASE

MICROPROCESSOR OVERCURRENT

AND EARTH FAULT PROTECTION RELAY

TYPE

IM30-BY

3.00

OPERATION MANUAL

MULTIFUNCTION

OVERCURRENT +

EARTH FAULT

RELAY TYPE

IM30-BY

ENTER/RESET

MODE

SELECT

PROG.

I>>

PROG/

I.R.F

MICROELETTRICA SCIENTIFICA

MILANO ITALY

O>>

BLOCK

INPUT

BR.

FAIL.

FUNC.

DISAB.

IM30-BY

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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 characteristics and operation_______________________________________________________________ 4

2.1 Power supply________________________________________________________________________________4

2.2 Operation and Algorithms______________________________________________________________________ 5

2.2.1 Input Quantities__________________________________________________________________________5

2.2.2 1F50/51 –First Overcurrent element_________________________________________________________ 6

2.2.3 2F50/51 –Second Overcurrent element_______________________________________________________7

2.2.4 3F50/51 –Third Overcurrent element_________________________________________________________7

2.2.5 1F50N/51N –First Earth Fault element_______________________________________________________ 8

2.2.6 2F50N/51N –Second Earth Fault element_____________________________________________________9

2.2.7 Breaker Failure__________________________________________________________________________ 9

2.2.8 Algorithm of the time current curves__________________________________________________________ 10

2.3 Clock and Calendar___________________________________________________________________________11

2.3.1 Clock synchronization_____________________________________________________________________ 11

2.3.2 Date and time setting_____________________________________________________________________ 11

2.3.3 Time resolution__________________________________________________________________________ 11

2.3.4 Operation during power off_________________________________________________________________ 11

2.3.5 Time tolerance__________________________________________________________________________ 11

3 Controls and measurements_______________________________________________________________________ 12

4 Signalization_____________________________________________________________________________________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 (Actual measure)_____________________________________________________________ 17

10.2 MAX VAL (Max values)_________________________________________________________________ 17

10.3 LASTTRIP (Last trip)____________________________________________________________________18

10.4 TRIP NUM (Trip number)_________________________________________________________________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 relay________________________________________________ 21

13 Manual and automatic test operation________________________________________________________________ 22

13.1 Mode “ TESTPROG “ subprogram “ W/O TRIP “_______________________________________________ 22

13.2 Mode “ TESTPROG “ subprogram “ With TRIP “_______________________________________________ 22

14 Maintenance_____________________________________________________________________________________ 22

15 Power frequency insulation test_____________________________________________________________________22

16 Electrical characteristics___________________________________________________________________________23

17 Connection diagram (Standard Output)_______________________________________________________________ 24

17.1 Connection Diagram (Double Output)___________________________________________________________ 24

18 Wiring the serial communication bus________________________________________________________________ 25

19 Change phase rated input 1A or 5A__________________________________________________________________ 25

20 Time current curves IEC___________________________________________________________________________ 26

21 Time current curves IEEE__________________________________________________________________________ 27

22 Direction for pcb’s draw-out and plug-in_____________________________________________________________ 28

22.1 Draw-out______________________________________________________________________________ 28

22.2 Plug-in_______________________________________________________________________________ 28

23 Overall dimensions_______________________________________________________________________________ 29

24 Keyboard operational diagram______________________________________________________________________ 30

25 Setting’s form____________________________________________________________________________________31

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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.

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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 dimension

drawings.

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



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



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





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



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

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

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2.2 –Operation and Algorithms

2.2.1 –Input Quantities

System Frequency

The system frequency Fn can be set to 50 or 60 Hz

Current inputs (See Connection Diagram § 17)

The relay directly displays the r.m.s. value of Phase Currents “ IA, IB, IC “ flowing in the Primary of

the input Current Transformers and refers all its measurements to that value.

To make the relay properly working with any C.T., when programming the relay settings we have to

load the value of the Rated Primary Current ” In “ of the phase CTs:

In = (1-9999)A, adjustable in steps of 1A.

Similarly for the Residual (Zero Sequence) Current, we have to load the value of the Rated Primary

Current On=(1-9999)A, adjustable in steps of 1A.

If the input of the Earth Fault element is supplied by the Residual connection of the 3 phase CTs, the

same value as “ In “ shall be set for “ On “.

If the input of the Earth Fault element is supplied by a separated Core Balance CT, or by another

CT, “ On “ set will be the Rated Primary Current of this CT, normally different from “ In “.

The Rated Secondary Current of the CTs, can be either 1A of 5A.

For the Phase Current inputs, 1A or 5A configuration can be selected by moving the jumpers

provided on the CT input card (see § 19).

For the Earth Fault Current input, 1A or 5A taps are provided on relay terminals board : 1A or 5A

configuration is obtained by connecting the Residual Current inputs respectively to terminal 32-33 or

32-31 (see Connection Diagram § 17).

Example :

Phase CTs 1500/5A and Core Balance CT 100/1A

Load In = 1500A and On = 100A

Configure CT input card with jumpers J1, J2, J3 in the 5A position.

Connect Earth Fault input to terminals 32-33

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2.2.2 –1F50/51 –First Overcurrent element

Operation mode : F(1I) = D, A, B, C, MI, SI, VI, EI

The time-current operation characteristics of this element can be

- Independent definite time : F(1I) = D

- Inverse time according to different time-current curves (see § 2.2.9)

Operation level : 1I = (0.25-4)In, adjustable in steps of 0.01In.

The value set for the variable 1I is the minimum r.m.s. value of the current flowing in at least one of

the 3 phase currents “ IA, IB, IC “ which makes the element start functioning.

Trip time delay : t1I = (0.05-30)s, adjustable in steps of 0.01s.

As soon as the current of any phase (IA, IB, IC), exceeds the set value [1I] the element starts to

operate:

- The led “ I> “ starts flashing.

- The timer ” t1I “ starts counting down

- Any output relay programmed to be operated by the instantaneous element “1I” (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

If during “ t1I “ count down, the current in all the 3-phases drops below 0.95 [1I] the element and the

timer are reset.

In the Independent Definite Time mode ” F(1I) = D “ at the end of the set time [t1I] - if the current

remained continuously above the reset level 0.95 [1I] –the element trips:

- The led “ I> “ is steadily illuminated.

- Any output relay programmed to be operated by the time delayed element “ t1I “ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

In the Inverse time operation modes, the Trip Time delay is that resulting from the equations of the

selected Time-Current-curve (see § 2.2.9).

Reset of the Led is operated by pressing the yellow Reset push button on relays front face or via

Serial Port (see MSCom operation). Reset of the output relay takes place as explained in § 5.

Any time the time delayed element trips, the Event Recording “ Last Trip “ is activated

(See § 10.3) and the trip counter “ TRIP NUM “ is increased (See § 10.4).

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2.2.3 –2F50/51 –Second Overcurrent element

The time-current operation characteristics of this element is Independent Definite Time

Operation level : 2I = (0.5-40)In, adjustable in steps of 0.1In.

The value set for the variable “ 2I “ is the minimum r.m.s. value of the current flowing in at least one

of the 3 phase currents “ IA, IB, IC “ which makes the element start functioning.

The set value [2I] of the operation level can be automatically doubled during inrush transients if the

variable [2Ix2] is set to ON (See § 12).

Trip time delay : t2I = (0.05-3)s, adjustable in steps of 0.01s.

As soon as the current of any phase (IA, IB, IC), exceeds the set value [2I] the element starts to

operate:

- The led “ I>> “ starts flashing.

- The timer ” t2I “ starts counting down

- Any output relay programmed to be operated by the instantaneous element “2I“ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

If during “ t2I “ count down, the current in all the 3-phases drops below 0.95 [2I] the element and the

timer are reset.

At the end of the set time [t2I] - if the current remained continuously above the reset level 0.95 [2I] –

the element trips:

- The led “I>>“ is steadily illuminated.

- Any output relay programmed to be operated by the time delayed element “ t2I “ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

In the Inverse time operation modes, the Trip Time delay is that resulting from the equations of the

selected Time-Current-curve (see § 2.2.9).

Reset of the Led is operated by pressing the yellow Reset push button on relays front face or via

Serial Port (see MSCom operation). Reset of the output relay takes place as explained in § 5.

Any time the time delayed element trips, the Event Recording “ Last Trip “ is activated

(See § 10.3) and the trip counter “ TRIP NUM “ is increased (See § 10.4).

2.2.4 –3F50/51 –Third Overcurrent element

- Instantaneous operation level : 3I = (0.5-40)In adjustable in steps 0.1In.

It trips instantaneously as soon as the current exceeds the set level [3I], operates programmed output

relays and the led ” I>> “ - Reset takes place at 0.95 [3I].

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2.2.5 –1F50N/51N –First Earth Fault element

Operation mode : F(1O) = D, A, B, C, MI, SI, VI, EI

The time-current operation characteristics of this element can be

- Independent definite time : F(1O) = D

- Inverse time according to different time-current curves (see § 2.2.9)

Operation level : 1O = (0.02-0.4)On, adjustable in steps of 0.01On.

The value set for the variable “ 1O “ is the minimum r.m.s. value of the Residual Current (3Io) flowing

which makes the element start functioning.

Trip time delay : t1O = (0.05-30)s, adjustable in steps of 0.01s.

As soon as the Residual Current exceeds the set value [1O] the element starts to operate:

- The led ” O> “ starts flashing.

- The timer” t1O “ starts counting down

- Any output relay programmed to be operated by the instantaneous element “1O“ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

If during “t1O“ count down, the Residual Current drops below 0.95 [1O] the element and the timer are

reset.

In the Independent Definite Time mode “ F(1O) = D “ at the end of the set time [t1O] - if the current

remained continuously above the reset level 0.95 [1O] –the element trips:

- The led ” O> “ is steadily illuminated.

- Any output relay programmed to be operated by the time delayed element “t1O“ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

In the Inverse time operation modes, the Trip Time delay is that resulting from the equations of the

selected Time-Current-curve (see § 2.2.9).

Reset of the Led is operated by pressing the yellow Reset push button on relays front face or via

Serial Port (see MSCom operation). Reset of the output relay takes place as explained in § 5.

Any time the time delayed element trips, the Event Recording “ Last Trip “ is activated

(See § 10.3) and the trip counter “ TRIP NUM “ is increased (See § 10.4).

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2.2.6 –2F50N/51N –Second Earth Fault element

The time-current operation characteristics of this is Independent Definite Time

Operation level : 2O = (0.02-4)On, adjustable in steps of 0.01On.

The value set for the variable “2O“ is the minimum r.m.s. value of the Residual Current (3Io) flowing

which makes the element start functioning.

Trip time delay : t2O = (0.05-3)s, adjustable in steps of 0.01s.

As soon as the Residual Current exceeds the set value [2O] the element starts to operate:

- The led “ O>> “ starts flashing.

- The timer ” t2O “ starts counting down

- Any output relay programmed to be operated by the instantaneous element “2O“ (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

If during “t2O“ count down, the Residual Current drops below 0.95 [2O] the element and the timer are

reset.

At the end of the set time [t2O] - if the current remained continuously above the reset level 0.95 [2O]

–the element trips:

- The led “ O>> “ is steadily illuminated.

- Any output relay programmed to be operated by the time delayed element “t2O” (see § 12.2)

gets energized and picks-up operating its contacts accordingly.

In the Inverse time operation modes, the Trip Time delay is that resulting from the equations of the

selected Time-Current-curve (see § 2.2.9).

Reset of the Led is operated by pressing the yellow Reset push button on relays front face or via

Serial Port (see MSCom operation). Reset of the output relay takes place as explained in § 5.

Any time the time delayed element trips, the Event Recording “ Last Trip “ is activated

(See § 10.3) and the trip counter “ TRIP NUM “ is increased (See § 10.4).

2.2.7 –Breaker Failure

As soon as any of the output Relays R2, R3, R4 controlled by the phase overcurrent elements trips,

the time “tBF” is started; if at the and of the delay “tBF” the current flowing in any of the phase

elements has not drop down to zero, the Led “BR. FAIL.” is lit-on and the Relay “R1” is energized if

so programmed (R1 = BF see § 12.2).

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atTKB

t(I) 































2.2.8 - ALGORITHM OF THE TIME CURRENT CURVES

The Time Current Curves are generally calculated with the following equation :

(1) where :

t(I) = Actual trip time delay when the input current equals I

Is = Set minimum pick-up level

K =

Ts= Set time delay : t(I) = Tswhen

tr = Operation time of the output relay on pick-up.

The parameters A, B and a have different values for the different Time Current Curves.

Curve Name

Curve Identifier

IEC A Inverse

0.14

0.02

IEC B Very Inverse

13.5

IEC C Extremely Inverse

IEEE Moderate Inverse

0.0104

0.0226

0.02

IEEE Short Inverse

0.00342

0.00262

0.02

IEEE Very Inverse

3.88

0.0963

IEEE Inverse

5.95

0.18

IEEE Extremely Inverse

5.67

0.0352

For the IEC curves, being B = 0, the Time/Current equation (1), becomes:

Where Kt = (10a-1)Ts is the time multiplier

110A

















 

Ts1-10

1' aa

a

































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