Iu Protection; Hardware Trip; Harmonic Distortion - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

IU Protection

t
I6
IU
t6

Hardware trip

Harmonic distortion

90 | © 2013 ABB | 1SDH001000R0002 - L7804
Path
Main page - Menu - Advanced protections
Function
The protection IU protects against an imbalance between the currents of the individual phases
protected by the circuit-breaker.
When the activation threshold is exceeded, the protection trips within a fixed time.
Parameters
The following is a description of the parameters:
I
Parameter Description
Enabling
Activates/deactivates the protection.
It defines the current value that if exceeded activates the protection
(in reference to the curve, it is the part of the curve parallel to the
Threshold (I6)
ordinate).
It is represented as a percentage value of 1 In
The delay time between the exceeding of the I6 threshold and the
Time (t6) sending of the opening command (in reference to the curve t6, it affects
the entire curve, moving it along the vertical axis).
Path
Main page - Menus - Settings - Circuit-breaker
Function
The Hardware trip protection protects against internal connection errors in the circuit-breaker.
If enabled, the fault is signalled and an opening command is sent if one or more of the following
events is detected:
• Current sensors disconnected (phase or external if enabled).
• Rating Plug disconnected.
• Trip Coil disconnected (only signalling).
• Incompatibility between protection release and mainboard.
• Internal problems with the release.
IMPORTANT: the protection trips if the error conditions persist more than 1
second.
Path
Main page - Menus - Measurements
Function
The Harmonic Distortion protection allows a control alarm to be activated for a distorted wave
form.
If enabled, an alarm is activated for peak factors higher than 2.1.
ABB | SACE Emax 2
Ekip Touch protection release | 9 - Touch protections