Solid State vs Rotary
| Solid State | Rotary |
| Efficiency Very high, 92% or better, 5% no-load consumption |
Efficiency Very low, less than 80%, 30% no-load, consumption |
| Maintenance Low, no scheduled maintenance |
Maintenance High, daily, weekly, monthly, and annual |
| Installation Requirements No special installation |
Installation Requirements Complex, mounting, ventilation, vibration |
| Starting Current Inrush None, soft start |
Starting Current Inrush |
| Acoustical Noise Very low, less than 68 dba |
Acoustical Noise Very high, over 90 dba |
| Frequency Regulation Excellent, better than +/- 0.01% |
Frequency Regulation Poor, 8% typically |
| Voltage recovery time Excellent, less than 20 mSec |
Voltage recovery time Poor, 200 mSec |
| Life Expectancy Unlimited - At least 35 years |
Life Expectancy Fixed, bearing life, start/stop cycles |
| Fault Protection Fast responds instantaneously |
Fault Protection Moderate, about 50 mS response |
| Flexibility Excellent, multiple input frequencies, change output with keypad |
Flexibility Poor, limited to design |
Solid State vs MG - Efficiency vs Percent Load
Cost Savings
- Unit cost savings typically 30% Installation cost savings $ 8,000 / unit
- Maintenance cost $ 3,000 / unit / year
- Operations savings $1,500 to $11,000/unit / year - Varies by KVA and operating method
- Life expectancy savings 3/4 of initial cost - 20 years vs 35 years
FCX vs Other Solid State
- UL and CE approved
- Automatic phase rotation
- Overload
- 0.001% frequency drift
- 1% THD typical
- 0.5% Output modulation
- 20 mSec voltage recovery
- Simple diagnostics
- 55°C rated
- Active DC buss bleeder
- Active load sharing (5% balance)
- No Break Power Transfers
- Low input current distortion
- Open front design
- Weather Proof enclosure available
- Coated circuit boards to prevent corrosion
- PWM design
FCX Operational Advantages
- Microprocessor Control
- FPGA Technology
- Laminated Buss System
- Modular Semiconductors
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