Areva MiCOM P441, Техническое руководство

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Technical Data P44x/EN TD/E33
MiCOM P441/P442 & P444 Page 23/30
6.7 Zero sequence Power Protection (since B1.0)
Threshold Settings
Setting Range Step Size
Po Status Enabled/Disabled. -
Time Delay Fact. 0 – 2s 0.200s
Fix Time Delay 0 – 10s 0.010s
IN current set
0.05 - 4
In
0.01
In
P0 Threshold 0.05IN - IN 0.1IN
6.8 Channel Aided Directional Earth Fault Protection
6.8.1 Threshold Settings
Setting Range Step Size
Polarisation Zero seq. / Neg. seq. -
V> Voltage Set
(Vn=100/120 V) 0.500 - 20 V 0.010 V
IN Forward
0.05 - 4
In
0.01
In
Teleprotection Time delay 0 - 10s 0.1s
Scheme logic Shared / Blocking / Permissive
Tripping Any Phase / Three Phases
6.9 Under Voltage Protection
6.9.1 Threshold Settings
Setting Range Step Size
V<1 Voltage Set
(Vn = 100/120V) 10 - 120V 1V
V<2 Voltage Set
(Vn = 100/120V) 10 - 120V 1V
6.9.2 Under Voltage Protection Time Delay Characteristics
The Under voltage measuring elements are followed by an independently selectable time
delay. The first stage has a time delay characteristics selectable as either Inverse Time or
Definite Time. The second stage has an associated Definite Time delay setting.
Each measuring element time delay can be blocked by the operation of a user defined logic
(optical isolated) input.
The inverse characteristic is defined by the following formula :
( )
t
K
M
=
−
1
Where
K = Time Multiplier Setting
T = Operating time in seconds
M = Applied input voltage / Relay setting voltage (Vs)