We at Concord offer a comprehensive range of Motor Protection Relays to protect your motor from burn out due to frequent and common problems including over loading, single phasing etc. The EOCR are electronic solid state or MCU (Microprocessor based Motor Protection Relays with multiple protections including over loading. Single phasing, reverse phase, phase unbalanced, locked rotor, ground fault, short circuit and undercurrent to protect your motors from premature failures even in extreme circumstances. The EOCR-operates on the basis of current sending principle with inbuilt current transformers which not only sense the current but also protects the motor. With a provision for independent adjustment of D- Time ( Starting Delay Time) and O- Time ( Operating Time) with definite and /or inverse type characteristics with wide current adjustment range. The EOCR is well equipped to guard your motor from failures. The EOCR is widely used and accepted all over by major users in all segments of the industry including automobile, Steel, Chemical, Petrochemical, Machinery and Paper etc.
| Feature | Thermal Bimetal Over Load Relay | EOCR-Electronic Over Load Relay |
|---|---|---|
| Operating Principle | Bimetal curve by heat | Electronic Circuit and MCU |
| Intelligent Controls | No | Yes |
| Phase Loss Protection | No | Yes |
| Phase Loss Protection | No | Yes |
| Phase Reversal Protection | No | Yes |
| Locked Rotor Protection | No | Yes |
| Under Current Protection | No | Yes (ECR and EUCR) |
| Role of Ammeter | Required of Settings | Not required- Can be done by LED or digital Display |
| No Volt Relay | Required | Not Required- in built |
| Current Adjustment Range | Very small Range | Wide Setting Range |
| Inventory | Large | Minimised |
| Protection during frequent Starting and stopping | Nuisance tripping | Complete protection & no nuisance trippings |
| Trip Cause Indication | Not Possible | Yes (MCU Models) |
| Load Alert function | Not Possible | Yes (MCU Models with Display) |
| Sensitivity to ambient | Yes | No effect on the settings |
| Remote/Electrical Reset | Not Possible | Yes |
| Test Function | No | Yes |
| Power Consumption | 6-7 watt | 1-1.5 Watt |
The high versatility and unique design features of the EOCR make posssible the use of EOCR over a wide spectrum of applications for protection of all types of LT motors. Listed below are only few of the examples :
