Generator Protection - ABB SACE Emax 2 Series Operating Instructions Manual

2 - Generator protection

141 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Description
Specific protections and functions have been integrated into SACE Emax 2 circuit-breakers equipped with
Ekip LCD or Touch trip units (with Measurement enabler with voltage socket module), or Ekip Hi- or G
or G Hi- (LCD or Touch) trip units to protect low voltage synchronous generators against typical fault
conditions and to connect the generators to the installation. This ensures solutions that are compact and
simple to install, with no need to turn to indirect solutions.
Available information
More information is available in the White Paper
unit for SACE Emax 2", which provides:
• A list of the available protections and functions giving both the ABB name and the ANSI codes
(example: protection RQ, with ANSI codes 40 and 32R).
• For each protection, the fault conditions to which it is applied (example: for protection RQ, the
inversion of the sign of the reactive power, positive if outgoing from the generator).
• A description of the malfunctions that can lead to the above fault conditions (example: for reactive
power reversal, the loss of excitation and the consequent loss of the electromotive force, with
reactive power absorption from the network by the generator).
• The types of generator or installation in which such mulfunctions are most likely to take place (for
example: reversal of reactive power, smooth rotor generators).
• The consequences to which they may lead if the trip unit does not trip (example: for reversal of
reactive power, a voltage drop, if the network is not able to supply the required reactive power
with the consequent loss of system stability, and in any case an increase in temperature on the
generator windings).
• If the protection can be duplicated using the Hi- version of the trip unit, with the possibility of
setting the two protections independently, and therefore with the possibility of adding redundancy
to increase reliability, or to fine tune the adjustment of the protection.
• For each protection, the parameters to be set, the trip curves and the criteria for the setting of
parameters.
• For each of the above parameters, the values that can be assigned.
• For each protection, an application example.
• The description of the synchronism function, which can be implemented with the Ekip Synchrocheck
module (see the chapter "12 - Ekip Synchrocheck"), that permits the parallel connection of two
independent power supply systems.
For a summary of the fault conditions to which the protections are applied and of the parameters to be
set, see the chapter "Ekip Touch - Protections" starting on page 54.
Compatibility
To identify the trip units in which the protections are available, see the chapter "1 - Overview", and the
chapter "4 - Menu" and the paragraph "Advanced menus".
1SDC007409G0202
"Generator protections: Ekip G trip
Ekip Touch - Additional functions
ABB | SACE Emax 2
2 - Generator protection