MICROENER IM30-B00 Manuale utente

IM30-B00

Doc. N° MO-0132-ING

Firmware

2.0X

Data

22.04.2008

Rev.

Pag

MICROPROCESSOR

EARTH FAULT PROTECTION RELAY

TYPE

IM30-B00

OPERATION MANUAL

IM30-B00

Doc. N° MO-0132-ING

Firmware

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Data

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Rev.

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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 - Waste Disposal of Electrical & Electronic Equipment __________________________________________________ 4

1.12 - Fault Detection and Repair ______________________________________________________________________ 4

2. General __________________________________________________________________________________________ 4

2.1 - Power Supply__________________________________________________________________________________ 4

2.2 - Algorithm of the time current curves ________________________________________________________________ 5

2.3 - Clock and Calendar _____________________________________________________________________________ 6

2.3.1 - Clock synchronization. _______________________________________________________________________ 6

2.3.2 - Date and time setting.________________________________________________________________________ 6

2.3.3 - Time resolution. ____________________________________________________________________________ 6

2.3.4 - Operation during power off. ___________________________________________________________________ 6

2.3.5 - Time tolerance._____________________________________________________________________________ 6

3. Controls and Measurements _________________________________________________________________________ 7

4. Signalizations _____________________________________________________________________________________ 8

5. Output Relays _____________________________________________________________________________________ 9

6. Serial Communication ______________________________________________________________________________ 9

7. Digital Inputs_____________________________________________________________________________________ 10

8. Test ____________________________________________________________________________________________ 10

9. Keyboard and Display Operation ____________________________________________________________________ 11

10. Reading of Measurements and Recorded Parameters __________________________________________________ 12

10.1 - ACT.MEAS__________________________________________________________________________________ 12

10.2 - LASTTRIP __________________________________________________________________________________ 12

10.3 - TRIP NUM __________________________________________________________________________________ 12

11. Reading of Programmed Settings and Relay's Configuration ____________________________________________ 12

12. Programming ___________________________________________________________________________________ 13

12.1 - Programming of functions settings________________________________________________________________ 13

12.2 - Programming the configuration of output relays _____________________________________________________ 14

13. Manual Test Operation____________________________________________________________________________ 15

13.1 - Mode "TESTPROG" subprogram "W/O TRIP"_______________________________________________________ 15

13.2 - Mode "TESTPROG" subprogram "WithTRIP" _______________________________________________________ 15

14. Maintenance ____________________________________________________________________________________ 15

15. Power Frequency Insulation Test ___________________________________________________________________ 15

16. Electrical Characteristics__________________________________________________________________________ 16

17. Connection Diagram______________________________________________________________________________ 17

18. Wiring the Serial Communication Bus _______________________________________________________________ 17

19. Time Current Curves IEC (TU0388 Rev.0 1/2)__________________________________________________________ 18

20. Time Current Curves IEEE (TU0388 Rev.0 2/2) ________________________________________________________ 19

21. Direction for Pcb's Draw-Out and Plug-In ____________________________________________________________ 20

21.1 - Draw-out____________________________________________________________________________________ 20

21.2 - Plug-in _____________________________________________________________________________________ 20

22. Mounting _______________________________________________________________________________________ 21

23. Keyboard Operational Diagram_____________________________________________________________________ 22

24. Setting’s Form___________________________________________________________________________________ 23

IM30-B00

Doc. N° MO-0132-ING

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Data

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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.

IM30-B00

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

by touching the case.

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.

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

electrostatic potential. Shaking hands achieves equipotential.

Place the module on an antistatic surface, or on a conducting surface which is at the same potential

as yourself.

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 - Waste Disposal of Electrical & Electronic Equipment

(Applicable throughout the European Union and other European countries with separate collection

program).

This product should not be treated as household waste when you wish dispose of it. Instead, it should

be handed over to an applicable collection point for the recycling of electrical and electronic equipment.

By ensuring this product is disposed of correctly, you will help prevent potential negative consequence to

the environment and human health, which could otherwise be caused by inappropriate disposal of this

product. The recycling of materials will help to conserve natural resource.

1.12 - 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 2 current transformers measuring the earth fault zero-sequence current.

The first (HI = High Input) supplied from terminals 29 –28 (5A) or 29 –30 (1A) operates the third

high-set Earth Fault element 3I.

The second (LI = Low Input) supplied from terminals 32 –31 (5A) or 32 –33 (1A) operates the first and

the second Low-set Earth Fault elements 1I, 2I.

Taps for 1A and 5A input are provided on relay’s terminal board.

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.

2.1 - Power Supply

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-B00

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atTKB

t(I) 































2.2 - 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

















 

IKt

ITs1-10

1' aa

a

































IM30-B00

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2.3 - Clock and Calendar

The unit features a built in clock calendar with Years, Months, Days, Hours, Minutes, Seconds, Tenths

of seconds and Hundredths of seconds.

2.3.1 - Clock synchronization.

The clock can be synchronized via the serial communication interface.

The following synchronization periods can be set: 5, 10, 15, 30, 60 minutes.

Synchronization can also be disabled, in which case the relay ignores the serial broadcast signal.

In case synchronization is enabled, the unit expects to receive a sync signal at the beginning of every

hour and once every Tsyn minutes. When a sync signal is received, the clock is automatically set to

the nearest expected synchronization time.

For example: if Tsyn is 10min and a sync signal is received at 20:03:10 January the 10th, 98, then the

clock is set to 20:00:00 January the 10th, 1998.

On the other hand, if the same sync signal were received at 20:06:34, the clock would be set to

20:10:00, January the 10th 98.

Note that if a sync signal is received exactly in the middle of a Tsyn period, the clock is set to the

previous expected synchronization time.

2.3.2 - Date and time setting.

When the PROG/SETTINGS menu is entered, the current date is displayed with one of the groups of

digits (YY, MMM or DD) blinking.

The DOWN key operates as a cursor. It moves through the groups of digits in the sequence YY =>

MMM => DD => YY => …

The UP key allows the user to modify the currently blinking group of digits.

If the ENTER button is pressed the currently displayed date is set.

Pressing the SELECT button the current time is displayed which can be modified using the same

procedure as for the date.

If synchronization is enabled and the date (or time) is modified, the clock is stopped until a sync

signal is received via the serial port. This allows the user to manually set many units and have them

to start their clocks in a synchronized fashion.

If synchronization is disabled the clock is never stopped.

Note that the setting of a new time always clears 10ths and 100ths of sec.

2.3.3 - Time resolution.

The clock has a 10ms resolution. This means that any event can be time-stamped with a 10ms

accuracy, although the information concerning 10ths and 100ths of sec. can be accessed only via

the serial communication interface.

2.3.4 - Operation during power off.

The unit has an on board Real Time Clock which maintains time information for at least 1 hour in

case of power supply failure.

2.3.5 - Time tolerance.

During power on, time tolerance depends on the on board crystal (+/-50ppm typ, +/-100ppm max.

over full temperature range).

During power off, time tolerance depends on the RTC’s oscillator (+65 /–270 ppm max over full

temperature range).

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3. Controls and Measurements

Five key buttons allow for local management of all relay's functions.

A 8-digit high brightness alphanumerical display shows the relevant readings (xxxxxxxx)

(see synoptic table fig.1)

FIG.1

IM30-B00

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4. Signalizations

Eight signal leds (normally off) are provided:

Red LED

Io>

Flashing when measured current exceeds the set trip level [1I].

Illuminated on trip after expiry of the set trip time delay [t1I].

Red LED

Io>>

Same as above related to [2I], [t2I].

Red LED

Io>>>

Same as above related to [3I], [t3I].

Red LED

Ch Set

Off when setting program 1 is active.

Illuminated when setting program 2 is active.

Yellow LED

PROGR/

I.R.F.

Flashing during the programming of the parameters or in case of

Internal Relay Fault.

Red LED

BLOCK

INPUT

Flashing when a blocking signal is present at the relevant input

terminals.

Red LED

BR.FAIL.

Lit-on when the BREAKER FAILURE function is activated.

Yellow LED

FUNC.

DISAB.

Lit-on when the operation of one or more of the relay functions has

been disactivated in the programming.

The reset of the leds takes place as follows:

Leds

a,b,c,g

From flashing to off, automatically when the lit-on cause disappears.

From ON to OFF, by "ENTER/RESET" push button or via serial

communication only if the tripping cause has disappeared.

Leds

d,e,f,h

From ON to OFF, automatically when the lit-on cause disappears.

In case of auxiliary power supply failure the status of the leds is recorded and reproduced when power

supply is restored.

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5. Output Relays

Five output relays are available (R1, R2, R3, R4, R5)

a) - The relays R1,R2,R3,R4 are normally deenergized (energised on trip); these output relays are user

programmable and any of them can be associated to any (one or more) of the IM30-AB's functions.

One relay eventually associated to the instantaneous element of one of the functions, after pick-up,

normally drops-out as soon as the tripping cause disappears (current below the set trip level).

If the current remains above the trip level longer than the time delay programmed for the time delayed

element of the some function, the drop-out of the instantaneous relay is anyhow forced after an

adjustable waiting time [tBF]. (Diasactivation of the blocking output eventually used to block a relay

upstream in the distribution system). The timer tBF is also started at any time the relay R1 picks-up and

any relays R2, R3, R4 can be programmed to be energized at the end of the delay tBF (Breaker Failure

functions).

Reset of the output relays associated to any time delayed function can be programmed to take place

“Automatically” (tFRes= A) as soon as the tripping cause has disappeared, or “Manually” (tFRes= M)

only by operating the ENTER/RESET key on relay’s front or via the serial bus.

It has to be remarked that the programming structure does not allow to associate the same relay at the

same time to instantaneous and delayed elements. Therefore any relay already associated to any time

delayed element cannot be associated to any instantaneous element and viceversa.

b) - The relay R5, normally energised, is not programmable and it is deenergized on:



internal fault



power supply failure



during the programming

6. Serial Communication

The relays fitted with the serial communication option can be connected via a cable bus a fiber optic bus

for interfacing with a Personal Computer (type IBM or compatible).

All the functionalities that can be operated locally (for example reading of input measurement and

changing of relay’s settings) are also possible via the serial communication interface.

Furthermore the serial port allows the user to read event recording and stored data.

The unit has a RS232 / RS485 interface and can be connected either directly to a P.C. via a dedicated

cable or to a RS485 serial bus, allowing having many relays to exchange data with a single master P.C.

using the same physical serial line. A RS485/232 converter is available on request.

The communication protocol is MODBUS RTU (only functions 3, 4 and 16 are implemented).

Each relay is identified by its programmable address code (NodeAd) and can be called from the P.C.

A dedicated communication software (MSCom) for Windows 95/98/NT4 SP3 (or later) is available.

Please refer to the MSCom instruction manual for more information Microelettrica Scientifica.

IM30-B00

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7. Digital Inputs

Three digital inputs are provided: they are active when the relevant terminals are shorted

B2

(terminals 1 - 2)

it blocks the operation of the time delayed elements t1I and t2I.

B3

(terminals 1 - 3)

it blocks the operation of the time delayed elements t3I.

B4

(terminals 1 - 14)

Switching-over from Setting Program 1 (SP1) to Setting Program 2 (SP2)

- Terminals 1 –14 Open = Setting Program 1 active

- Terminals 1 –14 Shorted = Setting Program 2 active

The input B4 can also be activated via the serial communication port.

In this case Switching-back from SP2 to SP1 can only be made via serial

port.

Viceversa if the terminals 1 –14 are shorted, switching-back from SP2 to

SP1 cannot be made via the serial port.

When a function is blocked the pick-up of its time delayed output is inhibited. Programming allows to

have the inhibition either permanent as long as the blocking input is active (tB2=Dis; tB3=Dis) or

automatically removed after the expiry of the set trip time delay of the function involved plus an

additional time 2tBF (tB2=2tBF; tB3=2tBF). By proper interconnection of the blocking inputs and outputs

of different relays it is possible to configurate very efficient arrangements of logic fault discrimination as

well as to feature a safe and quick breaker back-up protection.

8. Test

Besides the normal "WATCHDOG" and "POWERFAIL" functions, a comprehensive program of self-test

and self-diagnostic provides:



Diagnostic and functional test, with checking of program routines and memory's content, run every

time the aux. power is switched-on: the display shows the type of relay and its version number.



Dynamic functional test run during normal operation every 15 min. (relay's operation is suspended

for less than 4ms). If any internal fault is detected, the display shows a fault message, the Led

"PROG/IRF" illuminates and the relay R5 is deenergized.



Complete test activated by the keyboard or via the communication bus either with or without tripping

of the output relays.

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