B44066T1022E520 Datasheet, PDF (6/7 Pages) TDK Electronics – Film Capacitors – Power Factor Correction

Film Capacitors – Power Factor Correction
Thyristor module
B44066T1022E520
TSM-LC-I
Cautions and Warnings
General
• Thyristor modules TSM series may only be used for the purpose they have been designed for.
• Thyristor modules TSM series may only be used in combination with appropriate pre-switched grid
separator device.
• Thyristor modules have to be projected in such a way that in case of any failure no uncontrolled
high current and voltages may occur.
• The devices in operation have to be protected against moisture and dust, sufficient cooling has to
be assured.
Attention
Due to the switching principle of the thyristor module the power capacitors are permanently loaded to
the peak value of the grid voltage (DC voltage) even when switched off. Therefore following rules
have to be obeyed in any case:
• For dynamic PFC-systems with TSM-LC-I standard power capacitors with voltage according to the
grid-voltage have to be used. It should be the same voltage as used in standard systems with
capacitor contactors (e.g. grid voltage 400 V, detuning factor 7%  capacitor voltage 440 V).
• In case a very fast re-switching time is needed by the process and a high detuning factor is
needed (e.g.14 %), it is recommended to replace the discharge resistors of the power capacitors
by special types (accessory EW22).
• In dynamic systems with TSM modules no fast discharge reactors may be used (reactor = DC-
wise short circuit).
• For standard PFC-systems (without reactors) one current limiting reactor per thyristor module is
mandatory.
• Thyristor modules in general have to be protected by superfast electronic fuses. Principles for
dimensioning have to be considered. Fuses in the system have to be marked.
• Due to the special switching, the PFC capacitors are fully loaded even when the particular step
has been switched off. Protection against contact has to be guaranteed. Warning signals in the
systems are required.
• Even in switched off state no electrical isolation is achieved for electronic switches. Therefore
parts of the systems may not be touched after switching off the complete system before the
capacitors have been completely discharged.
FAILURE TO FOLLOW CAUTIONS MAY RESULT, WORST CASE, IN PREMATURE FAILURES OR
PHYSICAL INJURY.
Note
For detailed information about PFC capacitors and cautions, refer to the latest version of EPCOS PFC
Product Profile.
FILM P PM
Please read Cautions and warnings and
Important notes at the end of this document.
Page 6 of 7
February 2013