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Event block name
Event names
HOC3
Start ON
HOC3
Start OFF
HOC3
Trip ON
HOC3
Trip OFF
HOC3
Block ON
HOC3
Block OFF
HOC4
Start ON
HOC4
Start OFF
HOC4
Trip ON
HOC4
Trip OFF
HOC4
Block ON
HOC4
Block OFF
The function registers its operation into the last twelve (12) time-stamped registers. The register of the
function records the ON event process data for START, TRIP or BLOCKED. The table below
presents the structure of the function's register content.
Table. 5.4.6 - 89. Register content.
Date and time Event
Fault type
Pre-trigger
current
Fault
current
Pre-fault
current
Trip time
remaining
Used SG
dd.mm.yyyy
hh:mm:ss.mss
Event
name
L1-G…L1-L2-L3 Start/Trip
-20ms current
Start/Trip
current
Start
-200ms
current
0 ms...1800s
Setting
group 1...8
active
5.4.7 Overvoltage protection (U>; 59)
The overvoltage function is used for instant and time-delayed overvoltage protection. Each device with
a voltage protection module has four (4) available stages of the function (U>, U>>, U>>>, U>>>>). The
function constantly measures phase voltage magnitudes or line-to-line magnitudes. Overvoltage
protection is based on line-to-line RMS measurement or to line-to-neutral RMS measurement (as the
user selects). If the protection is based on line-to-line voltage, overvoltage protection is not affected by
earth faults in isolated or compensated networks. The blocking signal and the setting group selection
control the operating characteristics of the function during normal operation, i.e. the user or user-
defined logic can change function parameters while the function is running.
The overvoltage function uses a total of eight (8) separate setting groups which can be selected from
one common source.
The function can operate on instant or time-delayed mode. In time-delayed mode the operation can be
selected between definite time (DT) mode and inverse definite minimum time (IDMT).
The operational logic consists of the following:
• input magnitude selection
• input magnitude processing
• threshold comparator
• block signal check
• time delay characteristics
• output processing.
A
AQ
Q-C215
-C215
Instruction manual
Version: 2.07
134
© Arcteq Relays Ltd
IM00040