IPC402x-UM-2209-1-2.x.x (en)
Ensto Protrol AB
Phone: +46 31 45 82 00
Alfagatan 3
internet: www.protrol.se
431 49 Mölndal, SWEDEN
49
e-mail: [email protected]
START
signal is generated when the sum current exceeds the set threshold,
Level
.
TRIP
earth fault is
generated after the set time
Delay
.
Settings
–
Non-Directional Earth Fault
:
Parameter
Description
Range
Factory value
Unit
Enable
Non-directional earth fault function activated
Never/
Always/
Only at close
Always
-
Level
Earth fault current level
0.1..500.0
10.0
A
Delay
Time delay between
START
and
TRIP
0..10 000
100
ms
Event delay
Time delay for
TRIP
interlocked with input,
alternatively time window for activation after
closing of circuit breaker
0..25 000
0
ms
Input qualifier
Input for release of
TRIP
, alternatively input for
ON indication for activation after closing of
circuit breaker
0..16
0 (non)
-
Trip relay
TRIP
output relay
0..8
0 (non)
-
Relay pulse
Pulse length of
TRIP
output signal
100..10 000
500
ms
Measurement type
Measurement method RMS or Fundamental
RMS/
Fundamental
RMS
-
Low level
Current level before for switch-on detection.
0.1..500.0
1.0
A
High level
Current level after for switch-on detection.
0.1..500.0
30.0
A
8.6 Phase Break
A phase break is identified as a failure of a phase without grounding. Typical scenario is the interruption
due to a down fallen phase conductor that does not get in contact with ground. The following criteria must
be met for phase interruptions to be detected:
▪
Residual current <
Low Level
▪
Current in one of the phases <
Low Level
▪
Current in the other two phases >
High Level
When the three criteria at the same time have been fulfilled during the set time
Delay
, a phase break is
detected. Phase breaks do not result in a start signal. Note that if a phase is missing but the two remaining
have a phase difference of 120 degrees, there will be no phase break. Such a fault is indicated by a non-
directional earth fault.
