Touch Protections; Availability (Performance); Neutral - ABB SACE Emax 2 Series Instructions For Use Manual

6 - Touch protections

Availability (Performance) The following is a complete list of the protections (and related parameters) available with all the trip units
12 | © 2018 ABB | 1SDH001316R0002 - ECN000086018 - Rev. C
equipped with a display, in the Protections and Advanced menus:
Name Protection against
Overload with long-time
L
(1)
delay
S Selective short-circuit
(9)
Instantaneous
I
(2)
short-circuit
G Earth fault
(4)(6)(9)(10)
Instantaneous short-
2I
circuit programmable
Instantaneous short
MCR
(3)
circuit on closing
IU Current unbalance
Temperature outside
OT
(7)
range
Instantaneous
IInst
short-circuit
Hardware Circuit-breaker internal
Trip connection error
Harmonic
Distorted waveforms
Distortion
Current
Programmable signal
thresholds
thresholds
(11)

Neutral

Neutral protection
(1)
The protection forces the tripping time to 1 second in two cases:
• if according to the calculation the time is less than 1 second.
• if the fault current is greater than 12 In.
(2)
Activatable with protection MCR= Off.
(3)
Activatable with protection I= Off.
(4)
The protection automatically deactivates in the event of a connection error of 1 or more sensors, or if the
measured current is higher than a maximum value:
• 8 In (with I4 ≥0.8 In).
• 6 In (with 0.5 In ≤I4 < 0.8 In).
• 4 In (with 0.2 In ≤I4 < 0.5 In).
• 2 In (with I4 < 0.2 In)
(5)
Detailed description in the Design Engineer's manual.
(6)
If the presence of sensor S.G.R. is activated, G protection adjustment is replaced by the Gext item in the
Advanced section. Both the G and Gext items are available with Ekip Hi-Touch and Ekip G Hi-Touch.
(7)
Available in the Circuit-Breaker Settings menu.
(8)
Locking Function available via Ekip Connect.
(9)
For all the UL versions the maximum time allowed by the trip unit is 0.4 seconds. If a higher value is set, the
trip unit signals the error and forces the parameter to 0.4 seconds.
(10)
For all the UL versions the maximum threshold allowed by the trip unit is 1200 A. If a higher value is set, the
trip unit signals the error and forces the parameter to 1200 A.
(11)
The current thresholds do not manage the trip, but only the signal.
Neutral Adjusting of the neutral setting is used to customize the L, S and I protections on the Neutral pole with a
control factor different from the other phases.
Represented as a percentage, it defines the multiplication factor applied to the tripping thresholds of the
protections (example: 50%= the tripping threshold of the neutral is half the phase threshold).
NOTE: adjust the neutral setting only with four-pole or three-pole circuit-breakers with external
neutral.
Threshold Time Function Auxiliary functions
X X X
X X X
X -- --
X X X
X -- --
X -- --
X X --
-- -- --
-- -- --
-- -- --
-- -- --
X -- --
X -- --
Ekip Touch protection trip unit | 6 - Touch protections
ABB | SACE Emax 2
(5) (8)
Thermal memory, Pre-alarm
threshold
Trip enable, Zone Selectivity,
Thermal Memory, Startup
enable, Lock
Startup enable, Lock
Trip enable, Zone Selectivity,
Startup enable, Locking,
Pre-alarm threshold
--
Monitoring period, Locking
Trip enable
Trip enable
--
--
--
Direction of current flow
--