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ABB | SACE Emax 2

Ekip Touch - Additional functions

2 - Generator protection

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 1SDC007409G0202 “Generator protections: Ekip G trip

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".

ABB SACE Emax 2 Series User Manual

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