Numerical Protection Relay

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Application

The numeric relays are mostly used in the generating stations and substations for automated protection. These relays can protect various components such as feeder, Motor, Generator, Transmission line, Transformers and Bus bars.

Models

SL No	Models
1	Numerical Over Current Relay
	1 ɸ - EOC01	Configurable 7 IDMT + 1 Definite Time curves 1 phase over current protection (ANSI CODE: 50/51)
	3 ɸ- EOC03 - (Basic/Advanced)	Configurable 7 IDMT + 1 Definite Time curves 1 phase over current protection (ANSI CODE: 50/51)
2	Numerical Directional Over Current Relay
	1ɸ - EOC11D - Basic/Advanced	Configurable 7 IDMT + 1 Definite Time curves 1 phase over current protection (ANSI CODE: 50/51)
	3ɸ - EOC33D - Basic/Advanced	Configurable 7 IDMT + 1 Definite Time curves 3 phase Directional over current protection (ANSI CODE: 67/50/51)
3	Numerical Voltage Relay
	Over Voltage (1ɸ/3ɸ) - EOV10/ EOV30 -Basic/Advanced	Configurable 3 IDMT + 1 Definite Time curves Single phase over voltage protection Configurable 3 IDMT + 1 Definite Time curves 3 phases over voltage protection (ANSI CODE: 59)
	Under Voltage(1ɸ/3ɸ) -EUV10/ EUV30 - Basic/Advanced	Configurable 3 IDMT + 1 Definite Time curves Single phase under voltage protection Configurable 3 IDMT + 1 Definite Time curves 3 phases under voltage protection (ANSI CODE: 59)
	Over & Under Voltage (1ɸ) - EUO10 - Basic	Configurable 3 IDMT + 1 Definite Time curves for overvoltage Configurable 1 IDMT + 1 Definite Time curves for undervoltage Single phase over voltage protection Single phase under voltage protection
4	Numerical Transformer Differential Relay
	1ɸ - ETD02 - Basic /Advanced	Configurable Dual Slope Characteristic Transformer Differential Protection (ANSI CODE: 87)
5	Numerical Distance Relay
	1ɸ - ELP11 - Basic /Advanced	Configurable 7 IDMT + 1 Definite Time curves Single phase Over Voltage Single Phase Line Protection with Quadrilateral Characteristic
6	Numerical Voltage/Current Negative Sequence Relay
	Voltage - ENS30 - Basic/Advanced	Negative phase sequence voltage protection (ANSI CODE: 47) Under voltage protection (ANSI CODE: 27) - Optional Over voltage protection (ANSI CODE: 59)- Optional Negative phase sequence current protection (ANSI CODE: 46)
	Current - ENS03 - Basic/Advanced	Over current protection (ANSI CODE: 50/51)- Optional
7	Numerical Frequency Relay
	3ɸ - EFR10 - Basic/Advanced	3 phase over/under frequency protection
8	Numerical over/under power factor relay
	3ɸ - EPF33 - Basic/Advanced	Field Configurable CT Secondary 1A or 5A 3 phases over power factor protection 3 phases under power factor protection
9	Numerical Over Current/Earth Fault Relay
	3ɸ - EPE04 - Basic/Advanced	Configurable 7 IDMT + 1 Definite Time curves 3 phase over current and earth fault protection (ANSI CODE: 50/51N)

Configurable 7 IDMT + 1 Definite Time Curves

Normal Inverse
Extremely Inverse
Very Inverse
Restricted Inverse
3 Sec Delay
1.3 Sec Delay
Long Time Delay
Definite Time

Configurable 3 IDMT + 1 Definite Time curves

3 Sec Delay
1.3Sec Delay
Long Time Delay
Definite Time

Configurable 3 IDMT + 1 Definite Time curves

Extremely Inverse
Definite Time

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