Eaton E Series User Manual

Note that Synchrocheck is a protection module of its own; if you want to use it you have
to activate it in the project settings ([Device Planning] »Sync . Mode« = “Use”); more
information about the Synchrocheck: ╚═▷ “5.2.9 Synchrocheck Settings”.
• [System Para / CT] »CT pri« sets the nominal current on the primary side of the•
current transformers.
• [System Para / CT] »CT sec« sets the nominal current on the secondary side of the•
current transformers.
For protection devices with two CT inputs (e. g. generator or transformer protection devices)
the settings have to be made for all inputs, of course.
For protection devices with CT and VT inputs, the menu [System Para / Direction] features
settings related to direction determination, for example:
• [System Para / Direction] »Phase MTA« sets the maximum torque angle (angle•
between phase current and reference voltage in case of a short circuit).
•
[System Para / Direction] »IR Dir Control«, or »IX Dir Control«: These options are
•
used as operating quantities for direction detection.
• [System Para / Direction] »Ground MTA« sets the neutral point treatment (ground•
maximum torque angle, i. e. angle between chosen operating quantity and chosen
reference quantity in case of a ground fault).
◦ isolated grid, sin(-90°): »Ground MTA« = 180°◦
◦ compensated grid, cos(180°): »Ground MTA« = 270°◦
◦ solidly earthed: »Ground MTA« = 170°◦
◦
impedance earthed: »Ground MTA« = 110°
◦
5.2.7
Blocking Parameters
It is an important principle that every protection module can be separately blocked. There
are usually the following blocking parameters part of every protection module:
•
»ExBlo1«, »ExBlo2«: These are setting parameters to which a binary signal can be
•
assigned. The complete protection module is blocked if any of the assigned signals
becomes true (“Active”).
⇒ There is no LED indication of the blocking. The protection module does not issue a
trip, there is no fault recording, etc.
• »ExBlo TripCmd«: This is a setting parameter to which a binary signal can be•
assigned. The protection module remains active if the assigned signal becomes true,
only the trip command is blocked.
⇒ There is an LED indication of the blocking, the fault recording works o.k., etc. But
there is no trip command.
77www.eaton.comE-Series Family Quick Start Guide
5 Con󰊟guration via PowerPort-E
5.2.7 Blocking Parameters

Eaton E Series Specifications

General

Brand	Eaton
Model	E Series
Category	Relays
Language	English