ACS 6000, like all members of ABB’s medium-voltage inverter range (ACS 1000, 2000, 5000 and 6000), does not require any power supply Fuses are known to be unreliable, costly and prone to deterioration. Instead, the inverter’s IGCT is used for protection. IGCT provides faster and more reliable protection of power components than fuses. If an overcurrent occurs, the protection triggers the trigger and initially clears the fault in less than 25 seconds, which is approximately 200 times faster than the cut-off time of a fuse. Avoiding unreliable fuses results in better overall reliability.
IGCT power semiconductor
The Integrated Gate Commutated Thyristor is a power semiconductor switching device specifically developed for medium voltage converters.
Based on well established GTO (Gate Turn Off Thyristor) technology, it enables intrinsically less complex, more efficient and reliable converter designs.
IGCTs combine high speed switching capabilities as known from IGBTs (Insulated Gate Bipolar Transistors) with high blocking voltage and low conduction losses as known from
GTOs.The IGCT combines the gate commutated thyristor together with the gate unit as integrated unit.
ACS 6000 Medium Voltage Inverter Included:
5SHY3545L0009
KUC755AE105
LXN1604-6 3BHL000986P7000
IGCT technology compared to GTO and IGBT
| GTO thyristor | High voltage IGBT | IGCT advantages | |
| Switching technology
Equipment design |
High blocking voltage Low on-stste lossesProven reliability Compact Fuseless design |
High switching frequency Low switching losses SnubberlessModular design |
High blocking voltage High switching frequency Low conduction losses SnubberlessProven reliability Allows compact and modular equipment design Simple topologies with low parts count Snubberless |
phase module
The ARU controls the energy flow to the DC link and keeps the DC link voltage at a constant level irrespective of changes in the supply network.
The ARU is designed as a self-commutated voltage source inverter in
6-pulse, 3-level topology for the following power ratings:
• 7 MVA
• 9 MVA
• 9 MVA continuous (11 MVA/20 seconds every 60 seconds)
• 11 MVA (continuous operation)
The units differ in their electrical ratings but have the same mechanical dimensions.
A maximum of three ARUs can be connected in parallel for drive power ratings up to 27 MVA resulting in 12-pulse or 18-pulse rectifier configura- tions.
Main components
The ARU consists of the following main components Phase modules consisting of integrated gate commutated thyristors,diodes and clamp capacitors
The phase modules for all power ratings are identical in construction.
The types of semiconductors used vary depending on the power rating. For this reason, phase modules for different power ratings cannot be mixed in the same ARU or INU.
Gate unit power supply (GUSP), an electrically isolated unit mainly supplying the IGCTs with auxiliary power
• Clamping circuit with di/dt chokes and freewheeling diodes protecting the circuit from excessive rises in current
• EMC filter protecting the transformer from excessive voltage slopes (dv/dt is limited to 1.7 kV/ms)
• Interface board (INT) serving as a communication interface to the control system in the COU. The pulse firing logic for the IGCTs and fast protection functions are integrated
on the board as well. Fiber optic cables are used for transmission of data between the interface board and the control system and for the gate firing signals of the IGCTs.
• Fast short circuit detection (FSCD) monitoring the main power circuit for short circuits
Related Product Models:
5SHX1060H0003
5SHX1445H0002
5SHX2645L0004
5SHY3545L0003
5SHY3545L0016
5SHY35L4510
5SHY5045L0020
KUC720AE01
KUC755AE106
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