Low-voltage Products Lifecycle Managementdl.mitsubishielectric.com/dl/fa/document/catalog/... ·...

© Mitsubishi Electric Corporation

Mitsubishi Electric Low-voltage productsPLM (Product Lifecycle Management)

2© Mitsubishi Electric Corporation

We are surrounded by technology, and electricity is

one of important social infrastructures in our life.

Therefore, safe and reliable electrical system

is required in order to supply stable electricity.

Do you have these concerns or experiences?

●Concerned about the maintenance cost and the shortage of maintenance personnel

●Equipment is aging and worried about the lifetime of products.

●For continuous operation, maintenance span needs to be longer.

●Sudden blackout led to trouble.

●When old equipment was broken, it took long time to recover.

Please consider to renew products and facilities.

Suitable replacement leads to facility reliability


Minor failure may cause serious problem

Reliability of power supply is highly-demand with information networking such as Factory Automation, Computer Integrated Manufacturing, Office Automation andBuilding Automation.

For example, what will happen if sudden power outage occurs at your company now?●How much is the loss due to power outage for 1 hour?

・What is the impact of unexpected shutdown of production line or calculator?

●The failure may spread and it may cause power outage in other areas as well.

●It costs and takes time to recover (Some old products can not be exchanged)

Aging of equipment causes these problems

●Can not operate properly

・Switching and control device: can not make/break or trip

●Causes short-circuit fault

・Switching and control device: causes short-circuit fault due to insulation deterioration.



Lifetime of product

It is difficult to find an aging of equipment, however sudden failure occurs and it takes long time to recover. Therefore, preventive maintenance is very important.

Initial failureAccidental failure Failure due to wear

Failure

rate

Permissible failure rate

Year of use

Recommended renewal time

Lifetime

Time span that product can be used by conducting maintenance

Increase the possibility of serious accident

Environmental factors of shortening product lifetime

• Salty or corrosive gas environment.• Insufficient air-condition with rainwater and condensation due to gaps.• Fulfilled with exhaust gas. • Fulfilled with nitrate ion from metal pickling and etching circuit board.



Benefit of renewal

●Preventive maintenance ensure safety and reliability・All products are aging・Difficult to find deterioration・Suddenly fault may occur

●Improvement of product performance・Product performance dramatically has been improved compared to products of 30 years ago

●Optimize advanced products・Network devices enables to measure, display and transmit the collected data.

Circuit breakers and Meters with communication

Air circuit breaker（AE-SW series）

MDU breaker(Measuring Display Unit)

MultiMeter(ME96 series)



Each product Life cycle

Degree Environment Actual exampleGuide for replacement

(years)

Good environment

Place where air is always clean and dry

Electricity room with dust-proof and air-conditioning, etc.

Approx. 10 to 20

Indoors where levels of dust, etc., are low and there is no corrosive gas

Independent electricity room’s power distribution panel with no dust-proofing or air-conditioning, and breakers installed in enclosure

Approx. 7 to 15

Poor environment

Place with gases containing sulfurous acid, hydrogen sulfide, salt or high levels of moisture, etc., but with low levels of dust

Geothermal power plant, sewage treatment plant, iron and steel mill, paper mill, pulp plant, etc.

Approx. 3 to 7

Place with particularly high levels of corrosive gases and dust, where humans cannot stay for long periods of time

Chemical plants, quarries, mines, etc.

Approx. 1 to 3

*Each product shall be replaced when operating cycles exceed specified number even within expected product lifetime.



VCT

LA

DS

VCB

VT

CT

Wh

LBS

CT

LBS

CT

ACB

MCCB

MC MC

MultiMeter

Case-sample of product renewal

MC MC

MCCB MCCB MCCB

ACB

THR THR THR THR

I>

V VM

A AM A AM

VM AM

ACB

MCCB

VT経年劣化

MC

Indicator


1933 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 Now

MCCBELCB

ACB

Motorstator

First launch of circuit breaker in Japan (1933)

SCHAT series(1965-’71)SCHAT+RU series(1972-’76)

SCRUMseries(1977-’85)

SUPER-SCRUMseries(1986-’94)

PSSseries(1995-’00)

WSseries(2001-’05)

WS-V series (since 2010)W＆WSseries(since2005)

AE-S series (1976-’00)

AE-H series (1985-’00)

AE-SS series(1991-’05)

AE-SW series (since 2005)

ES series (1960-’63)EM series(1963-´68)

MS series (1968-’76)

MS-A series(1976-’82)

MS-K series (1982-’94)

MS-N series(since 1994)

MS-T series(since 2012)

History of Low-voltage Power Distribution Products

EC series(1933-’53)EK series(1953-’60)


Renewal of low-voltage circuit breaker (example)

No-fusecircuit breaker

Earth leakage circuit breaker

No-fusecircuit breaker

WS-V series(World Super V Series)

MDU breaker(Measuring Display Unit)

Air circuit breaker （AE-SW series）

More than2000AF

Renewal of low-voltage circuit breaker


Check your circuit breaker lifetime

●How long have you used your circuit breaker?

・Expected product lifetime of circuit breaker is approximately 10～20 years since the date of

manufacturing with normal usage condition.

・It shall be replaced when operating cycles exceed specified number even within 10～20 years.

*Low-voltage Air Circuit Breaker is required to have regular maintenance and inspection (such as lubrication) by manufacturer. And when the products are stored for long time, proper maintenance and inspection are necessary before use.

Lifetime of circuit breaker

Item Normal service conditions

Ambient temperature From -10℃ to +40℃ and its average is less than 35℃

Humidity Relative humidity is from 45 to 85% and no condensation

Shock and vibration No abnormal shocks or vibrations

Carrying current The average is less than 80% of rated current

Others No dust, smoke and corrosive gas


Regular maintenance

（Visual inspection）

Diagnosis by renewal guidance

Deteriorated?

◆Flowchart of regular maintenance to diagnosis

Regular maintenance & Renewal guidance

Mitsubishi Electric MCCBs & ELCBs

●RENEWAL GUIDANCE●

MITSUBISHI ELECTRIC FUKUYAMA WORKS


Diagnostic criteria

・Rank A （0 ～ 20 points）It is possible to use without any procedure

・Rank B（21 ～ 29 points ）It is still possible to use but necessary toconsider renewal and be careful to use it when some parts are deteriorated. ・Rank C （more than 30 points）

It is necessary to consider renewal

Molded case circuit breaker/Earth leakage circuit breaker deterioration diagnosis check list

Factor Score

1

2

3

6

8

1

4

5

0

1

2

0

1

2

0

1

1

2

3

0

1

20

1

2

3

0

1

2

0

1

5

Yes / No

30 years or more

Sample NO.

Specifications

Accessaries

Serial number

Installation location

Model/ Number of poles / Rating

Installation date

Item

1．Year of use ×　3

Conditions

Less than 10 years

Less than 15 years

Less than 20 years

Less than 30 years

Normal（Monthly average is 35℃ or less）

High（Monthly average exceeds 35℃）

2．Number of

opearating cycles×　5

Less than specified operating cycles

Less than double of specified opearating cycles

More than double of specified opearating cycles

(2) Humidity ×　4

Low（Monthly average is 45% or less）

Normal（Monthly average is 85% or less）

High（Monthly average exceeds 85%）

(1) Ambient

temparature×　4

Low（Monthly average is 30℃ or less）

(2) Dust at line side

barrier area×　5

×　3(1) Pollution

Almost nothing

There is dust, oilmist etc (small amount)

There is dust, oilmist etc (large amount)

Nothing

There is soot (little)

There is soot (much)

There is metal powder

(3) Corrosive gas ×　10Not exist

Exist

(4) Carrying current

(The average)×　3

50% or less of rating

80% or less of rating

Exceed 80% of rating

×　7(3)Sign of overheating

in terminal area

Total score（ factor × score）

Neccesity of consideration for renewal

×　4

Exceed 100MΩ

5～100MΩ

less than 5MΩ

5．Insulation resistance*In the case of Earth leakage circuit brakers, insulation

resistance between the right and left poles cannot be

measured because the control circuit power is on

No discoloration

Slightly discolored due to overheat

Remarkably discolored due to overheat

3.

Op

era

tin

g e

nvi

ron

me

nt

and

con

dit

ion

s4.

A

pp

ear

ance

Self-regular maintenance of circuit breaker


Check item Check point Deteriorated condition

Appearance・Accumulation of dust and metal particle.・Cracking or Chipping of Molded parts.

・Adherence of dust and metal particle.・Cracking or Chipping of Molded parts.

Operation・Handle operation.・Nuisance trip

・Unsmoothness of operation.（Handle is heavy, nuisance trip occurs）

Insulationresistance

・Between phase, between earth(with 500V insulation resistance tester)* Cable shall be taken off

・5MΩ or less

Temperature ・Measure temperature of mold part byinfrared temperature sensor or thermo-label

・Terminal part has nearly 60K higher than ambient temperature

◆Self-regular maintenance by user (preventive maintenance)

Self-regular maintenance of circuit breaker


Renewal of motor starter (example)

Renewal of motor starter

S-N10

S-N50

S-K220

S-T10

S-T50

S-N220


Check your motor starter lifetime

●How long have you used your motor starter?

・Expected product lifetime of motor starter is approximately 10 years since the date of

first- use of product with normal usage condition.

・It shall be replaced when operating cycles exceed specified number even within 10 years.

*The degree of deterioration changes depending on environmental conditions or conditions of use such as frequent opening and closing operations, inching operations and continuous energization etc.

Life time of motor starter

N10～N35/T10～T50 N50～N800/T65～T100

Mechanical durability [Unit: 10,000 cycles]

1000 500

N10～N65/T10～T65

N80～N300/T80～T100

N400～N800

Electrical durability [Unit: 10,000 cycles]（ Category AC3）

200 100 50


Factors and signs that lead deterioration and failure

How to check deterioration of motor starter

Possiblecause

Environmentally Electrically Mechanically Other factors

Fault sign RustAbnormalheating

Deformation/Damage

Abnormalodor and noise

Frequentthermal trip

PossibleFailure

Bad electricalcontinuity

WeldingInsulationproblem

Operationproblem

Coil layer Short circuit

Damage to equipment

Electricshock

Stop Production line


K series A series

How to check manufacture date

N series

Checkhere

ex）00 2S

Year: 2000 February

ex）90 9S

Year:1990 September

ex）2 06A

Showa year: 52(Japanese calendar)

= Year:1997

June*The last two digits of years and the number

of month are described.October to December are represented alphabetically as below.ex) Sep→9, Oct→X, Nov→Y, Dec→Z

If the lifetime (10 years) has passed, we recommend you to upgrade it.

Since it is highly likely that the lifetime (10 years) has passed, we recommend you to upgrade it

*K, A series may have been manufactured in Showa-period.(Japanese calendar).If so, the year are described by the last one digit of Showa year and month.


Life time of contactor (motor starter)

< Movable contact side >

contact

alloy

contact

alloy

< Fixed contact side >

＜End of life of contact due to wear＞

Severe application requires frequent operations to start and stop the load (motor), such as conveyor and crane control that need frequent making and breaking operations and crane that need inching operations.As opening and closing operations increase, wear particles are generated and it accelerates contact wear. When the thickness of contact (Part A) becomes 50% of new contact, we judge that it is end of life of contact.


Life time of contactor (motor starter)

< Example: S-N180 type >

Coil tape is peeled off due to heating Fixed iron core

＜End of life of coil due to aging (more than 35A)＞

When ambient temperature is high (high humidity),and the product is installed closely, and control (operation) voltage is over voltage, and for continuous energization use, temperature rise of coil fluctuates (rise) and it accelerates coil aging (insulation deterioration) due to heating.


Renewal of indicator (example)

Renewal of indicator

VT

CT

ActiveEnergy

Windicator

PFindicator

Wtransducer

PFtransducer

Vtransducer

Vindicator

Aindicator

Atransducer

VT

CT

ELECTRONICMULTI-MEASURING

INSTRUMENTME96SS Series

◆Integrate 9 kinds of measurement devices into 1 device

ME96SS series has 9 functions and they enable to improve performance and reduce cost.


Electronic Multi Measuring Instrument ME96NS series

（old type）

Mechanical Measuring Instrument

21

Renewal of indicator

・Concerned about aging device・Want to save meter-reading power

・Low visibility・10 years since installation・Need more measuring items・Need MODBUS®TCP communication

Electronic Multi Measuring Instrument ME96SS series

・Easy to check data with high visibility liquid crystal display・Easy to collect data with multiple communication function

< MODBUS®RTU is equipped as standard >(MODBUS®TCP, CC-Link is optional)

・Able to collect data by SD memory card (Optional)

ME96SS Ver.A Series

MODBUS TCP⇔RTU Convertor:

MOXA MGATE MB3170 and etc.

RS-485

MODBUS®RTU

EcoMonitorLight

LAN

CH2

EthernetMODBUS®TCP

HUB

EthernetMODBUS®TCP

EcoWebServerⅢ

< Example of MODBUS®TCP system configuration >

ME96SS

Ver.A Series

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