LS ELECTRIC
LS ELECTRIC
Description
IMC-III
Programmable intelligent motor protection device applicable to various motor starting methods.
Features
Protection Function
ㆍVarious protection factor for motor (8 protection factors)
ㆍApplicable to invertor circuits
ㆍInstantaneous power failure compensation and restart
ㆍDigital meter function
Convenience Function
ㆍEase of installation
ㆍWide current range
ㆍFunction to save fault value and cause
ㆍSelf-diagnosis and sequence monitoring
ㆍTotal operating time and operating time setting
Communication Function
ㆍVarious communication compatibilities (RS485 modbus and 4~20mA output)
Protection factor
| Rating | Operating condition | Time | Remark | |
|---|---|---|---|---|
| Over current |
Inverse | Over 110% setting current | 1~60s/1s | 600% standard operating time |
| Definite time | Over 105% setting current | 1~60s/1s | Delay time 1~200s | |
| Phase fault | Over 70% current phase unbalance | Within 1.5s | Phase fault rate = Maximum Phase Current - Minimum Phase Current / Maximum Phase Current ×100% | |
| Phase unbalance | Current phase unbalance 30~50% | Within 5s | ||
| Reverse phase | Reverse the current phase | Within 0.1s | Over 110% minimum ratings | |
| Under current | Rating current 30~70% | Within 3s | ||
| Holding | Stall | Rating current 150~300% | Within 5s | Detection after over current setting time |
| Locked rotor | Rating current 200~700% | Within 0.5s | ||
| Ground fault | The current rating 0.1~2.5A setting | 0.05~1.0s | Ground fault delay operation | |
| Pre-alarm | Over 120% setting value | Bar-LED blinking | ||
Sequence
| Rating | Contents | ||
|---|---|---|---|
| Operating type | Direct operation | Non-reversible direct operation | |
| Y-▵ operation | Y operation time | 1~120s/1s | |
| Y-▵ switching time | 0.05, 0.1, 0.2s | ||
| Forward / Reverse operating | Reversible direct operation | ||
| Reactor | Reactor time | 1~120s/1s | |
| Inverter | Inverter delayed time | ON 1sec/0.1sec | |
| Instantaneous under voltage compensation |
Compensation time | OFF 1~10s /1s | |
| Re-operation delay time | 0~300s /1s | ||
| Under voltage detection | (Rating control voltage × 65%) ± 10% | ||
| Re-operation delay time | (Rating control voltage × 75%) ± 10% | ||
| Remote control | Local | LOP(Local Operation Panel) | |
| MCC | Motor Control Center | ||
| Auto | PLC, DDC, DCS auto operation | ||
| Remote | Modbus/RS-485 communication | ||
Specification
* D-Time(Delay time) : It is delay time for IMC-IIIa start during motor start time
* O-time (Operating delay time) : When over current generates more then setting current, that makes it delayed until IMC-IIIa operated.
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