abb -is-limiter.pdf

8/11/2019 ABB -Is-limiter.pdf

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PowerTechnologies/1

IS-limiter

-6841E

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6-2003-


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Medium voltage

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Medium voltage

technology

-6549E

11

-06-2003-

IS-limiter

The worlds fastest

switching device

Reduces substation cost Solves short-circuit problems

in new substations and substation extensions

Optimum solution for interconnection of

switchboards and substations

In most cases the only technical solution

Tried and tested in thousands of installations

Worldwide in service

The peak short-circuit current will never be

reached

The short-circuit current is limited

at the very first current rise


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Medium voltage

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Medium voltage

technology

-6550E

11

-06-2003-

IS-limiterThe worlds fastest

switching device

Link between

in-plant generation and

public systems


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Medium voltage

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Medium voltage

technology

-6554E11

-06-2003-

Technical Data

0.75 kV, ...5000 A, ...140 kARMS

12 kV, ...4000 A, ...210 kARMS

17.5 kV, ...4000 A, ...210 kARMS

24 kV, ...3000 A, ...140 kARMS

36 kV, ...2500 A, ...140 kARMS

40.5 kV, ...2500 A, ...140 kARMS

For higher rated currentsIS-limiters can be connected in parallel.

Rated

voltageRated

currentInterrupting

current


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Medium voltage

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Medium voltage

technology

-6553E11

-06-2003-

Insert holder and insert

Current commutated to fuseCurrent path uninfluenced


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Medium voltage

technology

-6552E11

-06-2003-

Single line diagram of a busbar system

with IS-limiterCurrent curve i=i1+ i2at the short-circuit location

Breaking of a short-circuit current by IS-limiter

i=i1+ i2 without

IS-limiter

i=i1+ i2with IS-limiterIS-limiter

CB


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echnologies/7

Medium voltage

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Medium voltage

technology

-6555E11

-06-2003-

IS-limiterinstalled in bus-tie

Advantages: Improving power quality,

Increasing the reliability of the system,

Reduction of the network-impedance,

Optimal load flow, Existing busbar system has not to be changed.

IS-limiter


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echnologies/8

Medium voltage

technology

Medium voltage

technology

-6556E11

-06-2003-

IS-limiter in generator feeder

Advantages:

Generator can be connected independent on

the short-circuit capability of the system,

Existing busbar system has not to be changed,

No need of expensive generator breaker.

M di lt


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echnologies/9

Medium voltage

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Medium voltage

technology

-6557E11-06-2003-

IS-limiter for connection of agenerator

to a fully loaded system

Advantages:

Private / industrial generator feeder can be

connected to the (fully loaded) grid,

Selective tripping of the IS-limiter (IS-limiter willoperate only for short-circuit faults in the grid)

IS-limiter in the bus-tie

with current-direction

comparison

Tripping of IS-limiter

No Tripping of IS-limiter

M di ltMedium voltage


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-6558E11-06-2003-

IS-limiter in parallel withreactor

Advantages:Avoid coppers losses of the reactor,

Avoid voltage drop of the reactor,

No electro-magnetical field on the reactor

Outgoing feeders

Medium voltageMedium voltage


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Medium voltage

technology

abb -is-limiter.pdf

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