Motor Protection relay block 7SR11 With (02)

Features and technical specifications:

1. CT inputs : 4 No’s
3. Binary inputs : 3 No
4. Binary output’s : 5 NO

1.Current Inputs
Either one or four current inputs are provided on the Analogue Input module. Terminals are available for both 1A
and 5A inputs. Two types of current input are incorporated within the relay, one type is used for phase fault and earth fault protection, while the other is used for sensitive earth fault (SEF) and restricted earth fault (REF).
Relays with one current input, can be ordered with an earth fault input or a sensitive earth fault input (SEF).
Relays with four current inputs, can be ordered as an earth fault input or a sensitive earth fault input (SEF).
Current is sampled at 1600Hz for both 50Hz and 60Hz system frequencies. Protection and monitoring functions of
the relay use either the Fundamental Frequency RMS or the True RMS value of current appropriate to the individual function. The waveform recorder samples and displays current input waveforms at 1600Hz.

2.Voltage Inputs
Three voltage inputs are provided on the Analogue Input module on the 7SR12 relay. Voltage is sampled at 1600Hz for both 50Hz and 60Hz system frequencies. Protection and monitoring functions of the relay use fundamental frequency voltage measurement. The waveform recorder samples and displays voltage input waveforms at 1600Hz.