Areva MiCOM P125, Technical Manual

Page: 187 / 362

Technical Data P12y/EN TD/D32
MiCOM P125/P126 & P127 Page 19/28
8.11 Residual Overvoltage Protection
−
Residual voltage: Fundamental only
8.11.1 Protection Setting Ranges
Setting range
[59] Residual Overvoltage Min Max Step
57–130V Input voltage.
Cortec code:
P127-AX---X
Ue>>>> ? No or Yes
Ue>>>> 1 V 260 V 0.1 V
tUe>>>> 0 s 600 s 0.01 s
220–480V Input voltage. Cortec code:
P127-BX---X
Ue>>>> ? No or Yes
Ue>>>> 5 V 960 V 0.5 V
tUe>>>> 0 s 600 s 0.01 s
ATTENTION
: THE Ue THRESHOLD SETTINGS DEPEND ON THE ADOPTED
CONNECTION OPTION. IN
CONFIGURATION/GENERAL OPTIONS
MENU OF THE P127 RELAY THE Ve INPUT CAN BE SET DIRECTLY
FROM A VT (I.E. FROM A DELTA VT) OR CAN BE DERIVED FROM THE
MEASUREMENT OF THE THREE PHASE TO NEUTRAL VOLTAGES
(3VPN). IN THIS CASE THE Ue IS CALCULATED AS:
) UC UB UA ( x
3
1
Ue
+ + =
THE SETTING OF THE Ue THRESHOLDS MUST TAKE THE ABOVE
FORMULA IN ACCOUNT.
8.12 Multishot Autoreclose Function (P126 & P127)
Main shots:
4 independent shots.
External logic inputs:
6 inputs (CB opened signal, CB closed signal, manual opening
command, manual closing command, blocking order, cycle activation).
Internal programmable trigger from phase and earth fault on all re-closing cycles.
External trigger from logic input.
Inhibit time on manual closing.
Programmable dead times and reclaim time setting.
Maximum CB closing control equal to 5s (+t_Pulse setting)