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1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 60

OQ Protection

Function

If one or more reactive powers read by the unit exceeds the Q27 threshold for a time greater than

t27, the protection sends the TRIP command.

To verify and simulate the trip times based on all the parameters, see:

 Protection summary table with the operating characteristics (page 79)

 Chart with tripping curve (page 92)

Parameters

Parameter

Description

Default

Enable

Enables/disables protection and availability on menu of the

parameters

OFF

Trip Enable

Activates/deactivates the open command: if disabled, the alarm

and the lapsing of the protection time are managed only as

information

OFF

Threshold

Q27

Defines the value that activates the protection.

The value is expressed both as an absolute value (kVAR) and as a

relative value (Sn), settable in a range:

0.4 Sn .. 2 Sn with 0.001 Sn step

1 Sn

Time t27

This is the trip time of the protection; the value is expressed in

seconds, which are settable in a range:

0.5 s ..100 s, with 0.5 s step

1 s

Constraints, limitations, and additional functions

From the service connector (with Ekip Connect) or with system bus communication it is also

possible to access the block functions, see page70.

OP Protection

Function

If one or more active powers read by the unit exceeds the P26 threshold for a time greater than

t26, the protection sends the TRIP command.