ABB REG216 Numerical Generator Protection

ABB REG216 Numerical Generator Protection

Description

three-phase

three-phase for 2- and 3-winding transformers

definite time delay, for phase and earth-fault, over-

and undercurrent

instantaneous operation or with definite time delay,

value evaluation wide frequency range, over- and undercurrent

overcurrent operation with definite time delay*

operation restrained by undervoltage

inverse current dependent time delay, for phase and

earth fault (51N)

definite time tripping

inverse time tripping

negative phase sequence current with definite time delay or

inverse time delay with thermal replica

definite time delay, over- and undervoltage

Applicable also for

-stator E/F(95%) (59 G/N)

-rotor E/F (64 R)**

- intertum fault protection

based on the displacement principle calculation of the

earth fault resistance.

in addition the units REX010 and REX011 are required

circular characteristics centered at origin of impedance plane

circular characteristics for loss of excitation protection

detecting loss of synchronism of a generator as against the net-

work

6-system high-voltage protection

distance protection with overcurrent or underimpedance starting

any characteristic angle, over and underpower for:

-active power

-reactive power

- reverse power protection

- minimum forward power

thermal replica with operating characteristic

according to ASA-C50.13***for:

- standard stator current (49 S)

- rotor current (49 R)

evaluation of negative phase sequence ofcurrents

inverse time delay;

with terminal replica

thermal protection with precise thermal replica

evaluation of voltage input

df/dt

voltage/frequency protection (81/27)

definite time delay or inverse time delay (81/27)

monitoring/comparing two groups of single- or three-phase volt-

age

instantaneous operation with definite time delay

supervision of phase angle frequency and voltage level of two

systems

AND, OR, flip-flop, time delay, counter