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| Electronic Load Controller (ELC) is a controller used in micro hydro power to control load and frequency of generator by diverting excess power generated to dummy/ballast load. |
| The purpose of ELC is to make sure that generated power is the same with consumed power (main load+ballast load) |
| Power diversion to ballast load is done by electronic switch Thyristor and automatically without any moving parts. |
| Therefore frequency and voltage will be maintained and stable. Following are some brief advantages of ELC for micro hydro power : |
| 1. Constant generated frequency and voltage |
| 2. No water hammer risk, no need to close turbine |
| 3. Avoid runaway speed on generator |
| 4. No operator required to control water |
| 5. Plug and play system, no setting or adjustment |
| 6. Maintenance free and long lifetime |
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| 1. Micro controller based for accuracy and high performance |
| 2. Phase angle control, two steps for less harmonic |
| 3. Built in under/over frequency relay |
| 4. Easy replacement with plug in socket |
| 5. Panel integrated with metering and protection |
| 6. Simple and robust easy in transport |
| 7. Competitive price and most affordable |
| 1. ELC Type | Digital system with microcontroller |
| 2. Control method | Phase angle control, two steps |
| 3. Power | 1 - 500 kW |
| 4. Voltage | 230/400 Volt (1 and 3 Phase) |
| 5. Frequency | 50 Hz or 60 Hz |
| 6. Freq. accuracy | <± 0.2 Hz |
| 7. Freq. sensing | 10 ms or 100 times/s at 50 Hz |
| 8. Recovery time | ±3 seconds |
| STANDARD PROTECTION | STANDARD METERING |
| 1. MCCB for main load | 1. Pilot lamps, 3P |
| 2. Contactor for main load | 2. Amp.meter ballast, 3P |
| 3. Fuse/ MCB for protection | 3. Amp.meter consumer, 3P |
| 4. Over/Under Freq. (optional) | 4. Voltmeter generator, 1P |
| 5. Over/Under Volt. (optional) | 5. Hour counter, 1P |
| 6. Lightning arrester (optional) | 6. Frequency generator, 1P |
