MEDIUM VOLTAGE SOFT STARTER TYPE VFS

UP TO 5 MW

UP TO 12 kV

UP TO 400 A

MOcOTech PresenTs The VAriAble Fre-qUency sOFT sTArTer (VFs) WiTh MAny UniqUe FeATUres And AdVAnTAges.

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cUsTOMer AdVAnTAges· Reduction of service and maintenance costs for drives

· Increase of lifetime for drives

· Start / stop with low mechanical stress

· Reduction of starting current

· Minimum voltage drop in the power supply

· Increasing the break away torque of the motors to be started due to frequency reduction

· Cost saving compact modular design with many options

· Basic design including mains connection, power electronics, pt, ct and control

· Withdrawable power module with mains contactor, by pass contactor and power electronics

· HH fuses for reduction of short circuit capacity

· All components with full options in one cabinet only

· Indoor installation

· Operation and maintenance of VFS from the front

· VFS may be mounted with backside against a wall

· Single or lined up installation

· Cost reduction for lined up installation with common bus bar

· Bus bar extendable

· Only 1 square meter floor space for each VFS

· Small incoming cable connection panel (ICCP)

· MV part metal enclosed

· Control part metal clad

· Cable connection from the bottom

· Removable cable entry plates ease the connection

· Service continuity category LSC 2A class PI

· Each thyristor protected with BOD against transient overvoltage

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MEDIUM VOLTAGE SOFT STARTER TYPE VFS

inTernAl Arc APPrOVed

T yPe APPrOVed

highesT OPerATOr sAFeT y

highesT AVAilAbiliT y

highesT OPerATiOn sTAbiliT y

drAW OUT POWer MOdUle

UlTiMATe breAk AWAy TOrqUe

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VAriOUs sysTeM Or PrOcess eFFecTs Will be AVOided:• Impact in gear teeth

• Impact in couplings

• Vibrations

• Jerky movement of conveyer belts

• Passing critical acceleration speed areas

• Surge (water hammer) problems in pipelines

• Voltage drop in power supply

Pump

Fan/Blower/Aerator

Compressor

Chiller

Refiner

Extruder

Centrifuge

Mill Crusher

Hacker

Conveyor

Roller

Rotating converter

Bow thruster

Main propulsion

Water / W

aste w

ater

Power generatio

n

Pulp / Paper

Chemical / Petro

chemical

Mining

Cement / Stone

Wood processing

Building te

chnology

Marine / O

ff shore

Industry / P

roduction

APPlicATiOn exAMPles

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OPerATOr sAFeTy· Internal arc withstand tested acc to IEC 62271 part 200

· Type tested and approved design

· Operation of all components from front with closed doors

· No load switch (NLS) between bus bar and VFS equipment

· Isolating plate between open NLS contacts and bus bar provides a clear visible isolating distance between bus bar and service parts in VFS components

· Earthing switch

· Mechanical interlock between NLS, earthing switch and front door

· Common earthing bus bar

· Cylindrical door lock

· Electrical isolation between LV and MV circuits by use of fibre optic cable

FUncTiOns· Soft start

· Soft stop

· Frequency soft start for increase of break away torque

· Active break stop for quick stand still of motor

· DOL start

· Direct stop

· Motor turn function for machines with a long stand by time

· Starting curves: torque / time or current / time freely selectable

· Different starting ramps for pump control

· Dual start adjustment

· Integrated full motor protection features

· Alternative use of standard protection relais possible

· Test with small LV motor

xx

xx

Reduced frequency soft start with sinus wave skip function provides ultimate breakaway torque with low starting current

(principle diagram)

To avoid voltage drop in the power supply,

the starting current can be adjusted to a

pre-set limit. The first chart shows the

starting current. Black graph for DOL

start, coloured graphs for different pre set

maximum currents. The second graph

shows the corresponding torque

characteristics. Extra breakaway torque is

available due to frequency modulation in

the first starting phase. Raised current

limitation results into additional decreased

voltage drop.

sTArT cUrrenT liMiTATiOn (Adjustable max. current)

The high breakdown torque when starting

a motor DOL (black graph in first chart) can

be avoided.

Therefore a maximum torque during

acceleration is pre-selected (coloured graphs

in first chart). This reduces stress and impact

on the rotating equipment:

motor, coupling, gearbox, driven machine,

etc. Lifetime of machinery increases,

damages are avoided.

A pre-selection of the required starting time

is also possible (second chart).

sOFT sTArT (Adjustable max. torque)

AdjUsTAble sTArT TiMe

Special acceleration and run down ramps

can be provided for different applications.

For example centrifugal pump control:

Controlled start up avoids damages in pipe

systems due to torque peaks and sudden

pressure increase.

To avoid water hammer effect during pump

stop the run down is controlled in order to

reach a smooth flow reduction. This avoids

excessive noise and damage in the pipe

system (black graphs in the charts for

DOL start and coloured graphs for controlled

pump start / stop). A pre-selection of the

required run down time is also possible.

sPeciAl rAMPs

Example centrifugal pump start and stop

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sTArTing TiMe

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OPTiOns· MV cable connection from top

· Incoming cable section right- or backsided

· Customised MV panels attached to same bus bar

· Different stage of completion for MV components inside VFS panel. (see single line diagram page 10)

· Different fixed power factor correction solutions

· Arc pressure release duct

· Remote I/O field housing

· Profibus and Modbus interface

· Many more options. Please consult us with your demands

sTAndArds· IEC 62271 Part 1 · IEC 62271 Part 102

· IEC 62271 Part 200 · IEC 60470 Part 2000

· IAC AFL 31,5 kA / 1 sec

· Ship classification approval (1)

TechnicAl dATA

Rated voltage kV 7,2 12

Rated current bus bar A …1850 …1850

Rated current feeder A …400(2) …400(2)

Rated short time current kA …40 …40

Rated peak withstand current kA …100 …100

Rated power frequency withstand voltage kV 20 28

Rated lightning withstand voltage kV 60 75

Operating frequency Hz 45–65

Protection class IP IP IP4X(2)

Site altitude m …1000(2)

diMensiOns And WeighTs

Rated voltage kV 7,2 12

Height mm 2250 2550

Depth mm 1100 1100

VFS (soft starter panel) width mm 900 900

ICCP (incoming cable connection panel) width mm 350 350

ICCP weight kg ...400 ...400

VFS weight kg ...1500 ...1500

Explanations: (1) project related / option; (2)higher / more on request

Please ask for our general technical specification (GTS) containing more details.

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keybOArd

· High quality and low cost when integrating the VFS into your drive systems.

· Digital microprocessor control with non–volatile memory and real time clock

· Multi level password access for operation and parameter adjustment

· Large illuminated interactive multi language display with 6 lines

· Metering and indication functions

· 10 LED for status information

· 4 LED for variable use

· Error memory, statistical data and diagnostic functions

· Standard CAN interface

reMOTe i/OConnection of 8 or 12 REMOTE RTD sensors and up to

12 digital in- and 12 digital output signals to be used for

local control functions at a remote IP 54 connection box

installed beside the drive saving a lot of cabling work.RTD PCB1 Left bearing (Machine)

2 Right bearing (Machine)

3 Front bearing (Motor)

4 Motor winding A1

5 Motor winding B1

6 Motor winding C1

7 Back bearing (Motor)

8 Spare

RTD 9-12 Spare

DI+DO 1-12 for local Signals

Can Bus

CPU

RUN

READY

FAULT

LOCAL

REMOTE

RUN

STOP

DOL

TEST

AUX_A

AUX_B

AUX_C

AUX_D

MOTOR TURN

SOFT STOP

STOP

SET

MENU/OK

LAMP TEST

HORN OFF RESET

MiMic diAgrAM WiTh led POsiTiOn indicATOrs

A mimic diagram with position

indicators provides clear status

information about the main circuit

to the operator. All position indica-

tors including the SCR symbols are

LED illuminated.

The LED alternate between red /

green and grey colour for the

various status conditions.

9

m

single line

10

· Lined up VFS starter with common main bus bar

· Individual VFS starter for each motor

· Space saving due to small dimensions

· Low price

· Standard panels can be attached

· High availability

Incoming panel ICCP (o)

VFS panel

Bus bar

ON – OFF no load switch (o)

Earthing switch (o)

Current limiting HH fuses (o)

Earthing bolt

Surge arrestors (o)

Measuring voltage transformer

Measuring current transformer

Mains contactor (o)

By-pass contactor

SCR power stack

Insulation plate (o)can be inserted from front

1

2

3

4

5

6

7

8

9

10

11

12

13

14

This single line is only symbolic and might not be in line with point of installation for hardware components

(o) = optionPls consult us if you require other options

insTAllATiOn AlTernATiVe A

M3 ~

M3 ~

M3 ~

M3 ~

M 1 M 2 M 3 M 4IN

1 2

9

11

12

13

3 ~

3

6

4

5

8

14

10

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· Lined up VFS starter with common main- and aux starting bus bar

· Several motors share one VFS starter

· Individual motor will be switched to main bus bar after start up

· Space saving due to small dimensions

· Low price

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· Stand alone VFS starter

· Individual VFS Starter for each motor

· Clear motor - starter allocation

· High availability

insTAllATiOn AlTernATiVe b

insTAllATiOn AlTernATiVe c

IN M 1 M 2

M3 ~

M3 ~

M 3 M 4

M3 ~

M3 ~

M3 ~

M3 ~

M3 ~

VFS 1 M 1 M 2 M 3IN

mocotech gmbh Nordring 20 47495 Rheinberg – Germany phone +49 (0)2843 90488-0 fax +49 (0)2843 90488-44 info@mocotech.de www.mocotech.de

PrOFile

The first choice for your motor starters should be a company which concentrates on your specific project

requirements, supports you and takes full responsibility for the design and production of your starters.

Mocotech realises tailor made solutions based on well proven technologies. We combine flexible solutions

and high quality to implement your individual project goals. Our full attention is on your selected targets

and demands. 60 years experiance in drive technology ensure and guarantee the service availability and

operation stability of your plants.

PrOdUcT

Mocotech presents with the VFS starter many unique technical features. Mocotech is the

first company at the global market which has obtained the IEC 62271-200 type test to meet current

safety demands for MV switchgears and motor starters. You receive at MOCOTECH the highest

value for your drive technology investment.

serVice

Qualified and experienced engineers, take every day the full responsibility for the design, engineering,

production and quality control. We provide after sales services for and training of our customers in our

headquarters at Rheinberg in Germany. Local dealers and agents are available for site support in most areas

around the world.

cOMMiTMenT

We are pleased to serve the steady increasing number of frequent customers who put their trust in our

company. We commit ourselves to produce only reliable and competitive motor starters in top quality. You

can always expect the best from Mocotech.

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