GBT-LCI Current-source High-voltage VFD
GBT-LCI provides speed control and soft starting for large electrically excited synchronous motors. Thyristor-based systems can be configured with multi-pulse rectification and air or water cooling.
Typical Applications
Industries: Power generation, metallurgy and petrochemicals.
Equipment: Large fans, pumps, compressors and pumped-storage units.
Product Overview
Typical Challenges

Product Features

Specifications

| Input | |
|---|---|
| Input Configuration | 6-, 12- or 24-pulse thyristor rectifier |
| Input Voltage | Any supply voltage can be accommodated by configuring the primary side of the GBT-LCI input transformer accordingly. |
| Input Voltage Variation | ±10% without derating ±15% with derating (ride-through below −15%) |
| Input Frequency | 50/60 Hz |
| Input Frequency Variation | ±5% |
| Input Power Factor | Approximately 0.85 at rated speed/load |
| Input Harmonics | Compliant with IEC 61000-2-4, IEEE 519 and GB/T 14549-93 |
| Auxiliary Voltage | 380–690 V AC, 50/60 Hz, three-phase, ±10% |
| Control Voltage | 90–300 V DC or 90–265 V AC, 50/60 Hz, ±10% |
| Output | |
| Output Power | 2,000–72,000 kW (higher power available on request) |
| Output Voltage | 2.1–2 × 10 kV |
| Output Frequency | 0–120 Hz |
| Motor Type | Synchronous motor |
| VFD Efficiency | >99% |
| Mechanical | |
| Enclosure Protection Rating | Standard: IP30 Air-cooled options: IP31, IP41 Water-cooled options: IP31, IP41, IP54 |
| Cable Entry | Bottom (top entry optional) |
| Environmental | |
| Altitude | 1,000 m (higher altitudes permitted with derating) |
| Ambient Air Temperature | +5 to +40°C (higher temperatures permitted with derating) |
| External Cooling Water Temperature | +2 to +32°C (lower or higher temperatures permitted with derating) |
| Noise Level | Water-cooled: ≤75 dB(A) Air-cooled: ≤85 dB(A) |
| Cooling Type | Air cooling or water cooling |
| Standards | EN, IEC, CE (CSA optional) |
Data Download

| Name |
Version |
format |
Size |
Date |
Download |
| GBT-LCI Series Current-Source High-Voltage Variable Frequency Drive - Product Manual | V1.0 | 33.35MB | 2026-11-11 |
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