D Protection - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

D Protection

t
D
I7
t7bw
t7fw
104 | © 2013 ABB | 1SDH001000R0002 - L7804
Path
Main page - Menu - Advanced protections
Function
Protection D protects against selective directional short circuit.
Depending on the detected direction of the current, the tripping time can be different.
NOTE: the current direction is compared with the direction of the flow of power that
is set on the release. The flow of power parameter is described in the paragraph that
describes the Ekip Measuring Pro module, on page 164.
I
When the activation threshold is exceeded, the protection trips within a fixed time determined
by the direction of the failure.
Parameters
It is possible to modify various parameters:
Parameter
Enabling
Threshold (I7)
Time (t7fw)
Time (t7bw)
Protection D has Directional Zone Selectivity, Startup Enable, see page 109.
Description
Activates/deactivates the protection.
It defines the current value that if exceeded activates the protection
(in reference to the curve, it is the part parallel to the ordinate).
It is represented both as an absolute value (Ampere) and as a
relative value (In, nominal value defined by the Rating Plug)
This is the delay time between the exceeding of the I7 threshold
and the sending of the opening command
It is considered in two conditions:
• Current direction detected: high → low (with flow of power set:
high → low).
• Current direction detected: low → high (with flow of power set:
low → high).
This is the delay time between the exceeding of the I7 threshold
and the sending of the opening command
It is considered in two conditions:
• Current direction detected: high → low (with flow of power set:
low → high).
• Current direction detected: low → high (with flow of power set:
high → low).
Ekip Touch protection release | 11 - Hi-Touch protections
ABB | SACE Emax 2