MICROENER MM30-W Manuale utente

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 1 of 29

MICROPROCESSOR

MOTOR PROTECTION RELAY

TYPE

MM30-W

OPERATION MANUAL

MULTIFUNCTION

MOTOR PROTECTION

RELAY TYPE

MM30-W

ENTER/RESET

MODE

SELECT

PROG.

St.N°

I>,O>

PROG/

I.R.F.

MICROELETTRICA SCIENTIFICA

MILANO ITALY

I2>,1

U,f,

ROTOR

STALL

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 2 of 29

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 Clock and Calendar________________________________________________________________ 5

2.2.1 Clock synchronization__________________________________________________________ 5

2.2.2 Date and time setting__________________________________________________________ 5

2.2.3 Time resolution_______________________________________________________________ 5

2.2.4 Operation during power off______________________________________________________ 5

2.2.5 Time tolerance_______________________________________________________________ 5

3 Controls and measurements____________________________________________________________ 6

4 Signalization_________________________________________________________________________ 7

5 Output relays_________________________________________________________________________8

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 (Actual measure)___________________________________________________12

10.2 MAX VAL (Max values)_______________________________________________________12

10.3 LASTTRIP (Last trip)_________________________________________________________ 13

10.4 TRIP NUM (Trip number)______________________________________________________ 13

11 Reading of programmed settings and relay’s configuration__________________________________ 13

12 Programming_________________________________________________________________________14

12.1 Programming of functions settings________________________________________________ 14

12.2 Programming the configuration of output relay_______________________________________ 16

13 Manual and automatic test operation_____________________________________________________ 17

13.1 Mode “ TESTPROG “ subprogram “ W/O TRIP “_____________________________________ 17

13.2 Mode “ TESTPROG “ subprogram “ With TRIP “_____________________________________ 17

14 Maintenance_________________________________________________________________________ 17

15 Power frequency insulation test_________________________________________________________ 17

16 Electrical characteristics_______________________________________________________________ 18

17 Connection diagram (Standard Output)____________________________________________________ 19

17.1 Connection Diagram (Double Output)_________________________________________________19

18 Wiring the serial communication bus_____________________________________________________20

19 Change phase rated input 1A or 5A______________________________________________________ 20

20 Thermal image curves_________________________________________________________________ 21

21 Inverse time unbalance protection element________________________________________________22

22 Direction for pcb’s draw-out and plug-in__________________________________________________ 23

22.1 Draw-out____________________________________________________________________ 23

22.2 Plug-in______________________________________________________________________23

23 Overall dimensions / Mounting__________________________________________________________ 24

24 Keyboard operational diagram__________________________________________________________ 25

25 Setting’s form________________________________________________________________________ 26

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 3 of 29

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.

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 4 of 29

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 3 current transformers: - two measuring phase current (the third current is

computed as vector sum of the two others) - one measuring the earth fault zero-sequence current.

Phase current rated input can be 1 or 5A (Selectable by movable bridges an relay card)

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

Phase-to-phase voltage input is supplied to one voltage transformer. Rated input voltage can be

adjusted from 100 to 125V –50 or 60Hz.

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.

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 5 of 29

2.2 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.

2.2.1 Clock synchronization.

The clock can be synchronized via a digital input (terminals 1 –14) or 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 only way to modify the current date and

time is via the front panel keyboard (SETTINGS menu) or the serial communication interface.

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.

2.2.2 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 captured.

On the other hand pressing the SELECT button leaves the current date unchanged and scrolls

the SETTINGS menu. Current time can now be modified using the same procedure described

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

a sync signal is received (via digital input or the serial port). This allows the user to manually set

many units and have them to start their clocks in a synchronized fashion.

On the other hand if synchronization is disabled the clock is never stopped.

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

2.2.3 Time resolution.

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

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

via the serial communication interface.

2.2.4 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.

2.2.5 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).

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 6 of 29

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

MEASURES

MAX VAL.

LASTTRIP

TRIP NUM

ACT MEAS

Actual measurement values

Max. values measured

Values measured at last five events

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

PRO

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.

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 7 of 29

4. SIGNALIZATIONS

Eight signal leds (normally off) are provided:

Red

LED

Flashing when motor heating exceeds the set alarm level [Ta].

Illuminated on overheating trip and/or activation of RTD input.

Red

LED

St.N°

Flashing after tripping of the consecutive starts number limitation

element [St.N°] during the restart inhibition time [tBSt]

Illuminated after tBSt expiry.

Red

LED

I>,O>

Flashing when the minimum pick-up level of the overcurrent element [I>]

and/or the Earth Fault element [O>] is exceeded.

Illuminated on tripping of the I> or O> element at the end of the relevant

time delay [tI>] or [tO>].

Red

LED

I2>,1

Flashing when negative sequence current exceeds the set minimum

pick-up level [I2>].

Illuminated on tripping of the unbalance inverse time element [tI2>] or of

the single phasing element [1].

Yellow

LED

PROG/

I.R.F.

Flashing during the programming of the parameters.

Illuminated on Internal Relay Fault detection.

Red

LED

U,f,

Flashing when any of the voltage and/or frequency and/or Power Factor

control elements starts operating.

Illuminated on tripping of any of the U,f, Power Factor element at the

end of the relevant time delay.

Red

LED

Flashing when motor current drops below the no-load running level [I<].

Illuminated on tripping at the end of the 3 sec time delay

Yellow

LED

ROTOR

STALL

Illuminated on tripping of the Locked Rotor element [ILR] or of the Rotor

Stall element [tTr].

The leds reset takes place as follows:

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

From Steady light to off by Enter/Reset push button (if the lit-on cause is cleared)

St.N°

I>,O>

I2>,1

ROTOR

STALL

PROG/

I.R.F.

U,f,

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 8 of 29

5. OUTPUT RELAYS

The unit MM30-W includes four (R1, R2, R3, R4) user programmable plus one diagnostic (R5) output

relays.

In the version MM30-WX the number of output relays can be increased by the addition of one or two

optional Relay Expansion modules REX-8.

The modules REX-8 are for protruding mounting and are controlled by the master module MM30-WX via

a screened twisted pair of cables connecting dedicated RS485 serial ports (see diagram herebelow).

The module REX-8 includes eight (RA, RB, RC, RD, RE, RF, RH, RG) user programmable plus one

(R-Diag) diagnostic output relays

The master module MM30-W can control altogether up to sixteen output relays

- 4 internal R1 –R2 –R3 –R4

- 8 from the first optional REX-8 module RA –RB –RC –RD –RE –RF –RG –RH

- 4 from a second optional REX-8 module RI(RA+RB) –RJ(RC+RD) –RK(RE+RF) –RL(RG+RH)

This second unit REX-8 is configured (by internal Dip-Switch) to operate the eight relays two by two in

parallel (only four user programmable outputs with double number of available contacts)

Any of the functions featured by the MM30-W can be programmed to control up to four out of the sixteen

user programmable output relays

MASTER

RELAY

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 9 of 29

The user programmable relays (all but R5, DIAG) are normally deenergized, i.e. energized on trip.

These relays pick-up as soon as the tripping cause appears (relays controlled by the instantaneous

functions) or at the end of the set trip time delay (relays controlled by time delayed functions).

The reset after trip takes place automatically as soon as the relevant tripping cause has been cleared.

The relays R5, R DIAG are not user programmable; they are normally energized and get deenergized

on :

- internal fault of MM30-W - Internal fault of REX-8

R5 - MM30-W power supply failure R DIAG - REX-8 power supply failure

- during the programming - Interruption/fault on the serial

control communication

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 download 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 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.

MM30-W

Doc. N° MO-0117-ING

Rev. 1

Pag. 10 of 29

7. DIGITAL INPUTS

The relay is fitted with three digital inputs activated when the relevant terminals are shorted by a cold

contact :

-R.T. (terminals 1-2) Remote Trip control.

Activation of the input R.T. (Terminals 1-2 shorted) produces the following

operation :

The output relay associated to the function R.T. is energized

The Trip Number Counter R.T. is incremented by 1 unit

The event recording is activated and shows “CAUSE: RT”

- S.p.C. (terminals 1-3) Speed switch control.

The Speed Control input is connected to an external N/O contact which

closes as soon as the motor is running. If the contact does not close within

the set start time [tst] from the moment the motor is energised, the Locked

Rotor function is tripped. The relay and the signal led associated to ILR are

energised, the recording on Last Trip will show cause SpC and trip N° LR will

be increased.

If the Speed Control function is not used, it must be disactivated by

programming the variable [Spc] = OFF (see § 12.1)

- RTD (terminals 1-14) Thermal probe.

This function is enabled by programming the variable

[RTD] = ON (see § 12.1)

If the function is enabled, the input RTD is activated when the resistance

connected to the terminals 1-14 exceeds the limits 50> R1-14 > 2900.

This limits respectively correspond to “Shorted Probe” (<50) or to

“Overtemperature” (R>2900)

In this case activation of the input 1-14 (terminals shorted) produces the

following operation:

The relay associated to R.T. is energized

The Led T> is lit-on.

The counter of Trip Number of the function T> is incremented

LastTrip recording shows : "CAUSE RTD"

N.B.

If the RTD input is not used, a resistor of any value from 100 through 1000

Ohm rated >0.5W must by connected a cross the terminals 1-14

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 10 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.

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