Regulus uREG, User Manual

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uREG User Manual
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7.7. VT-2 / VT-1 MODULE (SLOT 2)
The VT-2 module with double v oltage t ransformers is mainly designed for supporting ATS
automatic units and wind plants.
The
VT-2 module houses 2 sets of 4 measuring transformers for voltages U0, U1, U2, U3 and 1
current transformer for I0.
Terminals of the
VT-2 module are grouped into 3 x Phoenix-Contact/Wieland slots:

8-pin MSTBA2.5/8-G strip (pitch: 5.00 mm, max 12 A, 250 V) for measurement of
U0, U1, U2, U3 voltages in section 1 within the range (Un: 100 V) = 0 ÷ 130V;

8-pin MSTBA2.5/8-G strip (pitch: 5.00 mm, max 12 A, 250 V) for measurement of
U0, U1, U2, U3 voltages in section 2 within the range (Un: 100 V) = 0 ÷ 130V;

2-pin GMSTBA2.5/2-G strip (pitch: 7.50 mm, max 12 A, 400 V) for measurement of
current
I0 within the range (In: 1 A) = 0 ÷ 10 A.
Fig. 7.7. Terminals of the VT-2 module.
The VT-2 module (combined with CT-0 ) is required for fulfillment of the following protective
criteria and functions, e.g.:

Overvoltage U> [in Section 1 and 2] • Power directional

Tripped overvoltage U>T [in Section 1 and 2] • Internal fSPZ/SCO

Overvoltage U0> [in Section 1 and 2] • Overcurrent earth-fault criterion I0>

Undervoltage U< [in Section 1 and 2] • Susceptance B0kier.>

Undervoltage U<T [in Section 1 and 2] • Conductance G0>

Difference of sectional voltages [1-2] • Conductance G0>kier.

Frequency [in Section 1 and 2] • Admittance Y0>

Frequency derivative df/dt> • Admittance YY0>

Vector Shift • Underpower for 3-phase reactive power (1 min.) Q3f<

Voltage derivative dU/dt • Overpower for 3-phase reactive power (1 min.) Q3f>

Second harmonic f100Hz> • Underpower for 3-phase active power (1 min.) P3f<

BKR capacitor bank control • Overpower for 3-phase active power (1 min.) P3f>

AWSCz automatic unit controller • Resistor controller

Synchro-check on both sections

deltaf< [Section 1-2]
The
VT-1 module is identical in terms of functionality, but it features increased measurement
threshold for voltages U0, U1, U2, U3 within the range 5 – 260 V (optionally 500 V AC) .