MICROENER IM30-SA Manuale utente

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 1 of 25

MICROPROCESSOR OVERCURRENT

AND EARTH FAULT PROTECTION RELAY

TYPE

IM30-SA

OPERATION MANUAL

MULTIFUNCTION

3ph O/C + E/F

+ Sensitive E/F

+ Neg. Seq. O/C

RELAY TYPE

IM30-SA

MODE

SELECT

I>>

Io>

Io>>

PROG/

I.R.F.

S.E.F.

I2>

BLOCK ACTIVE

BRKR FAIL.

MICROELETTRICA SCIENTIFICA

MILANO ITALY

ENTER/RESET

PROG.

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 2 of 25

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 Algorithm of the time current curves______________________________________________________ 5

3 Controls and measurements__________________________________________________________________6

4 Signalization_______________________________________________________________________________7

5 Output relays______________________________________________________________________________ 8

6 Serial communication_______________________________________________________________________ 8

7 Digital inputs______________________________________________________________________________ 9

8 Test______________________________________________________________________________________ 9

9 Keyboard and display operation_______________________________________________________________10

10 Reading of measurements and recorded parameters_____________________________________________ 11

10.1 ACT. MEAS (Actual measure) _________________________________________________________ 11

10.2 MAX VAL (Max values) _____________________________________________________________ 11

10.3 LASTTRIP (Last trip) _______________________________________________________________ 12

10.4 TRIP NUM (Trip number) ____________________________________________________________ 12

11 Reading of programmed settings and relay’s configuration________________________________________ 13

12 Programming______________________________________________________________________________ 13

12.1 Programming of functions settings______________________________________________________ 13

12.2 Programming the configuration of output relay_____________________________________________15

13 Manual and automatic test operation

13.1 Mode “ W/O TRIP ”__________________________________________________________________ 13

13.2 Mode “ WithTRIP “__________________________________________________________________ 15

14 Maintenance_______________________________________________________________________________ 16

15 Power frequency insulation test_______________________________________________________________16

16 Electrical characteristics_____________________________________________________________________17

17 Connection diagram Standard Output___________________________________________________________ 18

17.1 Double Output_____________________________________________________________________ 18

18 Wiring the serial communication bus__________________________________________________________ 19

19 Change phase rated input 1A or 5A____________________________________________________________ 19

20 Time current curves IEC_____________________________________________________________________ 20

21 Time current curves IEEE____________________________________________________________________ 21

22 Direction for pcb’s draw-out and plug-in________________________________________________________22

22.1 Draw-Out_________________________________________________________________________ 22

22.2 Plug-In___________________________________________________________________________ 22

23 Overall dimensions_________________________________________________________________________ 23

24 Keyboard operational diagram________________________________________________________________ 24

25 Setting’s form______________________________________________________________________________25

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 3 of 25

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 efficiency.

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 produced 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-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 4 of 25

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

a) - b) - 

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-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 5 of 25

atTKB

t(I) 































2.2 - ALGORITHM OF THE TIME CURRENT CURVES

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

where :

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

Is = Set minimum pick-up level

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

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

The constants A, B, K and ahave different values for the different Time Current Curves.

Curve Name

Curve Identifier

IEC A Inverse

0.14

0.02

0.3366

IEC B Very Inverse

13.5

0.6667

IEC C Extr. Inverse

1.2375

IEEE Moderate Inverse

0.0104

0.0226

0.02

4.1106

IEEE Short Inverse

0.00342

0.00262

0.02

13.3001

IEEE Very Inverse

3.88

0.0963

7.3805

IEEE Inverse

5.95

0.18

4.1649

IEEE Extremely Inverse

5.67

0.0352

10.814

Independent Definite time

t = Ts

Curves are user selectable for the following relay’s functions

1F51 (FI>) = Low-set phase overcurrent

1F51N (FO>) = Low-set Earth Fault current

F46 (FI2>) = Negative Sequence overcurrent

For functions

2F51 (I>>, tI>>) = High-set phase overcurrent

2F51N (O>>, tO>>) = High -set Earth Fault current

the operation is Independent Definite time only

110A

















IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 6 of 25

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 (xxxxxxx)

(see synoptic table fig.1)

FIG.1

MEASURES

MAX VAL.

LASTTRIP

TRIP NUM

ACT MEAS

Actual measuremant values

Max. values measured

Values measured at last tripping

N° of tripping for each function

Measurements

display

SET DISP

SETTINGS

FRELAY

Display of setting

Display of configuration of output relay

Setting Program

display

PROGR

SETTINGS

FRELAY

Setting of parameters

Configuration of output relays

Set Programming

PROG

TEST PRG

W/O TRIP

WithTRIP

Functional Test

Test with operation of signals and output relays

Test with operation of signals only

Test activation

by the key ENTER

Paramater scanning

by the key

SELECT

Parameter modification

by the key “+” “-”

Set validation

by the key ENTER

Scanning of

the menus by

the key

“+” “-”

MODE

SELECT

ENTER

+ -

(*) Enabled only if input current is zero

(*)

ENTER/RESET

MODE

SELECT

PROG.

The SELECT button chooses

which category of values within the

chosen mode to display

Pressing this button progressively

selects between

Measurements Display,

Setting Display, Programming,

and Test modes

When in Program mode, this

button stores the newly selected

value. If not in Program mode and

the relay has tripped, this button

resets the relay and all output

contacts. If not tripped, this button

restores the default display.

The + and - buttons are used to

select the actual measurement or

display desired when in

Measurements Display or Settings

Display modes. When in Program

mode, these buttons increase or

decrease the value of the

displayed setting.

When in Program mode, and when

all input currents are zero,

pressing this recessed button

places the relay into active

programming mode, allowing any

or all of the relay’s settings to be

altered.

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 7 of 25

4. SIGNALIZATIONS

Eight signal leds (normally off) are provided:

Red LED

Flashing when measured current overcomes the set trip level [I>].

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

Red LED

I>>

Same as above related to [I>>], [tI>>].

Red LED

Io>

Same as above related to [O>], [tO>].

Red LED

Io>>

Same, as above related to [O>>], [tO>>].

Yellow LED

PROGRAM/

BLOCK FAIL

Flashing during the programming of the parameters or in case

Illuminated on Internal Relay Fault.

Red LED

S.E.F.

Flashing when measured current overcomes the set trip level [I>].

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

Red LED

I2>

Flashing when measured current overcomes the set trip level [I>].

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

Yellow LED

BLOCK ACTIVE

BRKR FAIL

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

terminals.

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

The reset of the leds takes place as follows:



Leds

a,b,c,d,g

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

From ON to OFF, by "ENTER/RESET" push button only if the

tripping cause has disappeared.



Leds

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.

I>>

Io>

Io>>

BLOCK ACTIVE

BRKR FAIL

PROG/

S.E.F.

I2>

I.R.F.

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 8 of 25

5. OUTPUT RELAYS

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

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 one of the IM30-SA'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 relevant

function, the drop-out of the instantaneous relay is anyhow forced after an adjustable waiting time

[tBO].(Diasactivation of the blocking output eventually used to block a relay upstream in the

distribution system).

Moreover any of the relays R1,R2,R3,R4, can be programmed to be energised at the end of the

delay tBF(Breaker Failure function)

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.

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-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 9 of 25

7. DIGITAL INPUTS

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

terminals

1 –2

it blocks the operation of the time delayed elements relevant to phase fault

detection.

terminals

1 –3

it blocks the operation of the time delayed elements relevant to earth fault and

Sensitive E/F detection.

terminals

1 –14

Remote Reset

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 (tBf=OFF; tBo=OFF) or

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

additional time 2tBF (tBf=2tBO; tBo=2tBO). 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 4 ms). 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.

IM30-SA

Doc. N° MO-0089-ING

Rev. 1FW: 1.01

Pag. 10 of 25

9. KEYBOARD AND DISPLAY OPERATION

All controls can be operated from relay's front or via serial communication bus.

The keyboard includes five hand operable buttons (MODE) - (SELECT) - (+) - (-) - (ENTER/RESET)

plus one indirect operable key (PROG) (see synoptic table a fig.1):

White key

MODE

when operated it enters one of the following operation modes

indicated on the display :

MEASURES

Reading of all the parameters measured and of those recorded

in the memory

SET DISP

Reading of the settings and of the configuration of the output

relays as programmed.

PROG

Access to the programming of the settings and of relay

configuration.

TEST PROG

Access to the manual test routines.

Green key

SELECT

When operated it selects one of the menus available in the

actual operation MODE

Red key

“+”AND “-“

When operated they allow to scroll the different information

available in the menu entered by the key SELECT

Yellow key

ENTER/RESET

It allows the validation of the programmed settings

- the actuation of test programs

- the forcing of the default display indication

- the reset of signal Leds.

Indirect key



Enables access to the programming.

ENTER/RESET

MODE

SELECT

PROG.

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