Woodward HighPROtec MCDLV4, Руководство пользователя, Страница: 604 / 1275

Protective Elements
Tripping curve
These symbols are used in the following description of the tripping principles of phase differential protection:
Symbol Explanation
S
N
Rated Power of the Protected Object
V
LL
Rated Voltage of the Protected Object
V
LL,W1
Rated Voltage of side W1 (primary / high-voltage) of the transformer
V
LL,W2
Rated Voltage side W2 (secondary / low-voltage) of the transformer
CT
pri,W1
Primary Rated current of Current Transformer on transformer side W1
CT
sec,W1
Secondary Rated current of Current Transformer on transformer side W1
CT
pri,W2
Primary Rated current of Current Transformer on transformer side W2
CT
sec,W2
Secondary Rated current of Current Transformer on transformer side W2
I
b
Base current (is depending on the applied context, in general, it is the Rated Current of the
Protected Object. See also the information given above in Section „Phase Differential
Protection Applications“.
I
b ,W1
Base current or Rated Current of transformer primary side (W1)
I
b ,W2
Base current or Rated Current of transformer secondary side (W2)
I
pri,W1
I
pri,W2
Uncompensated primary current phasors on corresponding winding side

I
W1

I
W2
Uncompensated secondary current phasors on corresponding winding side
604 MCDLV4 DOK-HB-MCDLV4-2E