Power Quality Solutions by EPCOS

Switching techniques TSM Thyristor switch

Power Quality Solutions @ India

Dynamic PFC

Dynamic PFC is Power factor correction featuring

a suitable fast power factor controller (BR6000T)

an electronic thyristor switching module (TSM)

to achieve:

Transient-free switching

Power Factor Correction with high switching frequency

Minimal reaction-time (< 20 ms)

No wear out

Enhancement of power quality

Motor start-up compensation

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Application example

Chinas largest shipyard –

7 Mvar

EPCOS dyn. PFC installed!Welding Cranes

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Dynamic PFC – Product Overview

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Dynamic PFC: design basics

TSM

Real time –Power factor controller

Ó

Thyristormodule

GR

ID

LOA

D

Super fast fuses

DischargeResistors

Reactors

CapacitorsReaction-time: < 20 ms

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Multi-stage DYNAMIC PFC network

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Switching basics

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Thyristor switch versus solid state relays

A solid state relays is no dynamic PFC solution!

Solid state are switching in voltage zero

Every time you have to discharge completely to voltage zero!

More time

Additional stress for the caps

In case of EPCOS TSM no completely discharge is needed!

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Soft switching without high inrush currents

Normal contactors

3500A inrush current!157 times nominal current!

Almost Zero delay time

ULTRA FAST switching

No inrush current!!

EPCOS TSM thyristor switch

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Fast electronically controlled self observing thyristor switch

Available for capacitive loads of up to 10, 25 & 50 kvar

Suitable for dynamic PFC-systems in 380 V and

440 V grids

Micro-processor controlled alignment to tuned or de-tuned capacitor branches (up to 14 %) for optimized

switching behaviour

No system perturbation due to switching operations (transients)

Switching without delay (real time PFC)

Long, useful and maintenance free service life

No noise emission during switching operation

Compact module ready for connection

Front plate with operation and error message display

Optimized heat sinks

Key component TSM-LC thristor switch

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6 or 12 fast transistor switching outputs for thyristors, 1 error message output

Display of various line parameters (V, I, F, Q, P, S…)

20 pre-programmed control series and manual control series editor

Intelligent switching

No-voltage turn-off

Manual / automatic operation

Complete menu-guided operation and display

Four-quadrant operation

Extensive programming options (fault detection and output, skipping outputs, fixed stages, etc.)

Key component BR6000T

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Consists of two single resistors, 22 kΩ

each

Standard resistors may only be used in systems without reactors!

The usage of fast discharge reactors is not possible!

Usable for thyristor switches LC25, LC50 and LC200

Characteristics:

Power: 2 x 50 W

Voltage: 1200 V

Key component discharge resistor EW22

Power Quality Solutions @ India

Summary dynamic PFC

Benefits of dynamic PFC Elimination of reactive power for slow and fast fluctuating loads

Investment reduction due to cutting-off of peak loads

(distribution equipment, cable cross section, etc) Power Quality: avoiding of transients & voltage drops

Fast switching without delay time for discharging (< 20 ms) thus

high duty cycles

Stabilizing of grid voltage (avoiding of voltage drops), therefore

improvement of production processes in terms of quality and time Increase of life time and long term performance of:

Switches (due to an unlimited number of thyristor switching operations)

Capacitors (due to smooth switching without transients)

Application: Automotive

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Application – Automotive: Benefits

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Load peaks eliminated

Better utilization of distribution equipment

Application – Automotive: Benefits

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Application: Motor startup

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Application - Motor Startup: Benefits

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Vol

tage

Cur

rent

Without

With

Without

With

Application - Motor Startup: Benefits

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Reduction of current peaks

Voltage stabilization

Reduced voltage drop

Stabilization of processes

Load peaks eliminated (e.g. peak demand meters)

Higher utilization of distribution equipment

Application - Motor Startup: Benefits

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Application: Welding

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7 V

22 V

Application - Welding: Benefits

w/o Dynamic PFC

With Dynamic PFC

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Voltage stabilization

Reduced voltage drop

Improved power reliability

Enhanced welding quality

Due to higher voltage shorter process times

Application - Welding: Benefits

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Application: Elevators

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Vol

tage

Cur

rent

Without

With

With

Without

Application - Elevators: Benefits

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Overall improved Power Quality

Peak demand elimination

Avoiding of flicker phenomena

Reduction of electricity bill

Avoiding PFC penalty

Application - Elevators: Benefits

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Application: Cranes

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Application - Cranes: Benefits

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Reduction of cable size down to the cranes

Reducing voltage drop on long cable distances

Enhanced utilization of distribution equipment

Sometimes reduced investment due to reduced

sizing of distribution equipment

Application - Cranes: Benefits

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Application: Wind energy

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THD-V in generalV

olta

geTH

DV

5th

Har

mon

ic

With Without

Power Quality Solutions @ India

THD-I in generalC

urre

ntTH

DI

5th

Har

mon

ic

With Without

Power Quality Solutions @ India

Power Quality Solutions

Peak performance through great partnerships

Thank you for your attention!