MICROELETTRICA MC30-R2 Manuale utente

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

MICROPROCESSOR

OVERCURRENT and EARTH FAULT RELAY

with AUTORECLOSE

TYPE

OPERATION MANUAL

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

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 _________________________________________________________________________________________5

2.1 - Power Supply ________________________________________________________________________________5

2.2 - Operation and Algorithms _______________________________________________________________________6

2.2.1 - Reference Input Values _____________________________________________________________________6

2.2.2 - Input quantities ___________________________________________________________________________6

2.2.3 - Time Current Curves IEC (TU1029 Rev.0) ______________________________________________________8

2.2.4 - Time Current Curves IEEE (TU1028 Rev.0) ______________________________________________________9

3. Functions and Settings (Function) ____________________________________________________________________10

3.1 - T> (F49) - Thermal Image protection level ________________________________________________________10

3.1.1 - Thermal Image Curves (TU0445 Rev.0) _______________________________________________________11

3.2 - I> (1F51) - First overcurrent protection level _______________________________________________________12

3.3 - I>> (2F51) - Second overcurrent protection level ___________________________________________________13

3.4 - IH (3F51) - Third overcurrent protection level ______________________________________________________14

3.4.1 –Automatic doubling or Overcurrent thresholds on current inrush ____________________________________14

3.5 - Io> (1F51N) - First Earth Fault protection level _____________________________________________________15

3.6 - Io>> (2F51N) - Second Earth Fault protection level__________________________________________________16

3.7 - IoH (3F51N) - Third Earth Fault protection level_____________________________________________________16

3.8 - BF (F51BF) - Breaker Failure ___________________________________________________________________17

3.9 - I.R.F. - Internal Relay Failure ___________________________________________________________________17

3.10 - RCL - Reclosing function ______________________________________________________________________18

3.11 - Osc - Oscillographic Recording _________________________________________________________________20

3.12 - Comm –Communication Parameters ____________________________________________________________20

3.13 - LCD –Display and Buzzer operation _____________________________________________________________20

4. Logic Blocking of Functions _________________________________________________________________________21

4.1 - Blocking Outputs_____________________________________________________________________________21

4.2 –Blocking Inputs _____________________________________________________________________________21

5. Output Relays ___________________________________________________________________________________21

6. Digital Inputs____________________________________________________________________________________22

7. Selfdiagnostic ___________________________________________________________________________________22

8. Relay Management _______________________________________________________________________________23

9. Signalizations ___________________________________________________________________________________24

10. Keyboard Buttons _______________________________________________________________________________24

11. Serial Communication Port ________________________________________________________________________25

11.1 . Main RS485 Serial Communication Port __________________________________________________________25

11.2 - Communication Port on Front Face Panel _________________________________________________________26

12. MENU AND VARIABLES ___________________________________________________________________________27

12.1 - Real Time Measurements _____________________________________________________________________27

12.2 - Measure (Instantaneous Measurements) _________________________________________________________27

12.3 - Counter (Operation Counters) _________________________________________________________________27

12.4 –Trip/Ev. (Event Recording)____________________________________________________________________28

12.5 - R/W Set (Programming / Reading the Relay Settings) _______________________________________________29

12.5.1 - CommAdd (Communication Address) ________________________________________________________29

12.5.2 - Time/Date (Time/Date) ___________________________________________________________________29

12.5.3 - RatedVal (Rated Input Values) _____________________________________________________________29

12.5.4 - Function (Functions) _____________________________________________________________________30

12.6 - RelayCfg (Relay Configuration) _________________________________________________________________32

12.7 - Commands ________________________________________________________________________________33

12.8 - Info&Ver (Firmware - Info&Version) _____________________________________________________________33

13. Keyboard Operational Diagram _____________________________________________________________________34

14. Password ______________________________________________________________________________________35

14.1 - MS-Com Password __________________________________________________________________________35

15. Maintenance ___________________________________________________________________________________35

16. Power Frequency Insulation Test ____________________________________________________________________35

17. Connection Diagram _____________________________________________________________________________36

18. Overall Dimensions ______________________________________________________________________________36

19. Direction for Pcb's Draw-Out and Plug-In _____________________________________________________________37

19.1 - Draw-Out _________________________________________________________________________________37

19.2 - Plug-In ___________________________________________________________________________________37

20. Electrical Characteristics __________________________________________________________________________38

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

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 in the product's specification 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 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.

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.

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

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 authorized Dealers.

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

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

2. General

The MC is a very innovative and versatile line of Protective Relays which takes advantage of the long and

successful experience coming from the M-Line.

The main features of the MC-Line relays are:

Compact draw-out execution for Flush Mounting or for assembly in 19” 3U chassis for 19” Rack systems.

User friendly front face with 2x8 characters LCD Display, four signal Leds, four keys for complete local

management and 9-pin socket for local RS232 serial communication.

Four user programmable Output Relays. On request one of the Output Relays can be replaced by a Can Bus

port for control of additional I/O modules.

Three optoisolated, selfpowered Digital Inputs.

RS485 communication port (independent from the RS232 port on front panel)

Totally draw-out execution with automatic C.T. shorting device.

Input currents are supplied to 3 current transformers: measuring phase currents.

An additional internal CT directly measures the residual (Zero Sequence) current of the three inputs.

Current inputs can be 1 or 5A: selection between 1A or 5A is made by movable jumpers provided on the Relay

card. (see Fig 1)

The Measuring Ranges of the different inputs

respectively are:

Phase Currents

(0.1-40)In

Residual Current

(0.01-10)In

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

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

Type 1

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

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

Type 2

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

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

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

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

2.2 - Operation and Algorithms

2.2.1 - Reference Input Values

Display

Description

Setting Range

Step

Unit

100

Rated Primary current of phase C.T.

9999

Rated Secondary current of phase C.T.

1/5

100

Reference primary current of the relay

9999

Freq

System rated frequency

min

Warming-up time constant for Thermal Image

min.

105

%In

Max. admissible continuous overload for Thermal Image

130

%In

2.2.2 - Input quantities

2.2.2.1 - Mains Frequency (Freq)

The relay can operate either in 50Hz or 60Hz systems.

The rated Mains Frequency “Freq”must be set accordingly.

2.2.2.2 - Phase Current inputs (I1)

The relay directly displays the r.m.s. value of the 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, input the value

“I1”of the primary current of the phase C.Ts

2.2.2.3 - Earth Fault Current Input (Ion)

Same as for the Phase Currents, the relay directly displays the r.m.s. value of the Zero Sequence

Residual Current flowing at the Primary of the Current Transformers.

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

atTKB

t(I) +••













−













=α

2.2.2.4 - 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”

I = Maximum of the three input currents.

Is = Set minimum pick-up level

K =

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

tr = Operation time of the output relay on pick-up (7ms).

The parameters “A” 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

The maximum measuring current is “40xIn” for phase elements and “10xOn” for the neutral

element.

a110A−













−

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

2.2.3 - Time Current Curves IEC (TU1029 Rev.0)

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

2.2.4 - Time Current Curves IEEE (TU1028 Rev.0)

MC30-R2

Doc. N° MO-0462-ING

FW: 1290.37.01.x

Date

06.09.2022

Rev.

Pag.

3. Functions and Settings (Function)

The relay is provided with two groups of setting “ ” and “ ”.

Group

Functions

T>, I>, I>>, IH, Io>, Io>>, IoH, BF, IRF, RCL, Osc, Comm, LCD.

T>, I>, I>>, IH, Io>, Io>>, IoH, RCL.

3.1 - T> (F49) - Thermal Image protection level

FuncEnab

→

Enable

[Disable / Enable]

Options

→

No Param

No Parameters

TripLev

→

Tal

50.00

%Tb

(50.00 110.00)

step

%Tb

→

Tst

100.00

%Tb

(10.00 100.00)

step

%Tb

Timers

→

No Param

No Parameters

Description of variables

FuncEnab

If disable the function is disactivated.

Tal

Thermal prealarm temperature.

Tst

Reset level.

Warming-up is computed proportionally to the square of the largest phase current “I”.

-Allowed overloading time (See Curve)

The trip time delay “t”of the thermal element, depends on the warming-up time constant

“tw”, on the previous thermal status (Ip/In)2, on the admissible continuous overload (Ib) and, of

course, on the actual load (I)

Warming-up time constant

(1-60)min.

Largest of the three phase currents

Preheating current: Steady-State Current corresponding to the thermal status

existing at the moment when the current is increased to the overload value “I”

Continuously admissible current

(50-130)%In, step 1%In

Rated primary current of phase C.Ts



Natural logarithm

Reset takes please when the simulated temperature drops below the programming level [Tst].

An alarm signal is issued when the computed warming exceeds the set percentage “Tal”of the Full

Load temperature “Tb”.

:where

(Ib/In)(I/In)

(Ip/In)(I/In)

twt22













−

= n



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