bids are invited for testing and calibration of protection relay - burnt or defective relays repairing of ee make e-f & o-c relay as under with all material, labour with tandp. 1.replacement of all defective components like disc assembly with moving contacts, control spring fixed contact assembly, auxiliary contacts, defective coils, defective electronic components like diodes, resistance, condenser etc with new one of good quality. 2.varnishing of coils and overhauling of relay thoroughly after cleaning of all ports of relay by crc. 3.proper wiring, dressing and ferruling of all wires within relay. 4.testing and calibration of relay with minimum error limits allowable in relay. , primary injection of ct - primary injection of switch gear ct 1. checking of polarity test of new ct if replaced. 2. checking of ct ratio for protection and metering circuit. 3. finally checking of switchgear for tripping on fault by injecting o-c and e-f current through main ct. , primary injection of pt - primary injection of switch gear pt 1. replacing 11kv pt by replacing its burnt pole and broken bushing. 2. checking of polarity test of new pt if replaced. 3. checking of pt ratio for protection and metering circuit. 4. checking insulation and winding resistance of pt. , checking rectifying fault of control panel - checking and rectifying faults of control panel 1. checking of all the ampere meters with ampere selector switch. 2. checking of all the voltmeter with voltmeter selector switch. 3. checking of all the indication bulb light on, off and trip circuit faulty indications. 4. checking of all the auxiliary relays like master trip relay etc. 5. proper wiring, dressing & ferruling of all wires of control and meting circuit. 6. checking of electrical operation ocm by manually operating live protection relay 7. checking of all the wiring of ct protection circuit. 8. checking of all the wiring for metering circuit. , repairing of ct - repairing of burnt and damaged southern make ratio