ABB SACE Emax E1.2 User Manual

ABB | SACE Emax 2
68 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A Ekip Touch protection trip unit | 9 - Touch protections
IU Protection
I6
t
t6
I
IU
Path
Main page - Menu - Advanced
Function
IU protection protects against an unbalance 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.
Unbalance, expressed in percentage value, is calculated in the following way: % Sbil = 100 * (I
max
-I
min
) / I
max
,
where I
max
is the maximum and I
min
the minimum.
NOTE: The protection is automatically self-excluding in two cases:
• when at least one phase current exceeds 6 * In.
• when the maximum phase current is less than 0.3 * In.
Parameters
Here is a list of the available parameters:
Parameter Description
Enable To activate/deactivate the protection.
Threshold I6
It defines the current value that activates the protection when exceeded (with reference to
the figure above, the threshold is the part of the curve parallel to the y-axis).
It is represented as a percentage value of 1 In.
Time t6
The delay time between the exceeding of the I6 threshold and the sending of the opening
command (with reference to the curve, it affects the entire curve, shifting it along the
vertical axis).
IU protection has Trip Enable, see page 71.
Hardware Trip
Path
Main page - Menus - Settings - Circuit-breaker
Function
Hardware Trip protection protects against internal disconnections of the circuit-breaker.
If enabled, the fault is signalled and an opening command is sent when 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 trip unit and mainboard.
• Internal problems with the trip unit.
IMPORTANT: the protection trips if the error conditions persist for more than 1 second.
Harmonic distortion
Path
Main page - Menus - Measurements
Function
The Harmonic Distortion protection allows a control alarm to be activated for a distorted waveforms.
If enabled, an alarm is activated for peak factors higher than 2.1.

ABB SACE Emax E1.2 Specifications

General

Brand	ABB
Model	SACE Emax E1.2
Category	Circuit breakers
Language	English