|
Traditional
Bimetal Over Load Relay and EOCR Electronic motor
Protection Relay
|
|
Feature
|
Thermal
Bimetal Over Load Relay
|
EOCR-Electronic
Over Load Relay
|
| Operating
Principle |
Bimetal
Curve by heat |
Electronic
Circuit and MCU |
| Intelligent
Control |
No |
Yes |
| Phase
Loss Protection |
Yes
(inaccurate) |
Yes
(Accurate) |
| Phase
Unbalance Protection |
No |
Yes |
| Phase
Reversal Protection |
No |
Yes |
| Locked
Rotor Protection |
No |
Yes |
| Ground
Fault Protection |
No |
Yes |
| Undercurrent
Protection |
No |
Yes
(ECR and EUCR) |
| Role
of Ammeter |
Required
for setting |
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 |
