Regulus uREG, Руководство пользователя

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uREG User Manual
31
7.4. CT-0 MODULE (SLOT 1)
In the CT-0 module ( c urrent t ransformers module), there are 3 current transformers for
direct measurements of phase currents within the range (In: 5 A, 1 A) = 0 ÷ 192 A.
Phase current input circuits
Rated current In 5 A or 1A
Measurement range 0 ÷ 192 A
Measurement error within ranges: 0.05 ÷ 0.35 A <5 %
0.35 ÷ 50 A <1.5 %
50 ÷ 192 A
<5 %
Power input at I=In <0.5 VA
Rated frequency fn 50 Hz
Continuous current-carrying capacity 3 * In
1-second thermal endurance 100 * In
Dynamic withstand value 250 * In
Terminals of the
CT-0 module are grouped into three Wieland-Wiecon 4-pin symmetric
ports (screwed, type 8313S/4 WF OB; pitch: 7.50 mm, max continuous capacity 12 A, 400 V,
cable cross-section 2.5 mm2). Each pin k, l on the transformers is connected to two connector
terminals.
Fig. 7.4. Terminals of the CT-0 module.
The CT-0 module is required for fulfillment of the following protective criteria, e.g.:

Overcurrent I>

Tripped overcurrent I>T

Overcurrent dependent I>

Undercurrent

I0> (vector sum of currents Ir, Is, It)

Current asymmetry aI>

I>tilt (polygonal characteristic curve)

I1>, I2>, I3> for MSK.