Generator Shaft Current Leakage Protection Gslptoc ( Ansi 38,51) - ABB RELION REX640 Technical Manual

Protection and control

Hide thumbs Also See for RELION REX640:

Table of Contents

1MRS759142 F

Generator shaft current leakage protection GSLPTOC

( ANSI 38,51)

Identification

Function description

Generator shaft current leakage

Function block

Figure 248: Function block

Functionality

Generator shaft current leakage protection function GSLPTOC protects the

generator rotor bearings from damage caused by the shaft leakage current.

The function compares measured shaft current to the set alarm and operate levels.

Operate time characteristics are according to definite time (DT).

Analog channel configuration

GSLPTOC has one analog input which must be properly configured.

Table 495: Analog inputs

Operation principle

the function is enabled and respectively "Off" means function is disabled.

The operation of

using a module diagram (see figure below). All the modules in the diagram are

explained in the next sections.

Technical Manual

Operation setting is used to enable or disable the function. When selected "On"

Generator shaft current leakage protection can be described by

identification

Measured shaft current

Protection functions

ANSI/IEEE C37.2

device number