Woodward HighPROtec MCDLV4, Руководство пользователя, Страница: 466 / 1275

Field Parameters
Parameter Description Setting range Default Menu path
Phase MTA Maximum Torque Angle: Angle between
phase current and reference voltage in case
of a short circuit. This angle is needed to
determine the fault direction in case of short
circuits.
0 - 360° 45° [Field Para
/Direction]
IG calc dir ctrl Options for direction detection. IGcalc is
used as operating quantity.
IG calc 3V0,
IG calc IPol (IG
meas),
Dual,
I2,V2
IG calc 3V0 [Field Para
/Direction]
IG meas dir ctrl Options for direction detection. IGmeas is
used as operating quantity.
IG meas 3V0,
I2,V2,
Dual
IG meas 3V0 [Field Para
/Direction]
3V0 Source Earth overcurrent protection elements take
into account this parameter for direction
decisions. You have to ensure, that this
parameter is set to "Measured" only if the
residual voltage is fed to the fourth
measuring input of the voltage measuring
card.
measured,
calculated
measured [Field Para
/Direction]
Ground MTA Ground Maximum Torque Angle: Angle
between chosen operating quantity and
chosen reference quantity in case of a
ground fault. This angle is needed to
determine the ground fault direction in case
of a short circuit. Depending on the selected
ground direction option, different MTA
values are used: IGcalc 3V0, IGmeas 3V0 :
Ground MTA; IGcalc Neg, IGmeas Neg : 90°
+ Phase MTA; IGcalc IPol : 0°; IGcalc Dual :
0° (if I2 and V2 available) or Ground MTA;
IGmeas Dual : 90° + Phase MTA (if I2 and
V2 available) or Ground MTA.
0 - 360° 110° [Field Para
/Direction]
ECT Angle Cor Fine adjustment of the measuring angle of
the earth current transformers. By means of
the Angle Correction, faults of the earth
voltage transformers can be taken into
account.
-45 - 45° 0° [Field Para
/Direction]
466 MCDLV4 DOK-HB-MCDLV4-2E