4–35
System Setup and Setpoints – 4
V.T.x RATIO
VTX vtg ct_w1 ct_w2
V.T.x RATIO
_________________ :1
V.T.g RATIO
vtx VTG ct_w1 ct_w2
V.T.g RATIO
_________________ :1
W1 C.T. RATIO
vtx vtg CT_W1 ct_w2
W1 C.T. RATIO
_________________ :1
W2 C.T. RATIO
vtx vtg ct_w1 CT_W2
W2 C.T. RATIO
_________________ :1
W2 C.T. GROUND RATIO
CT_W2G ct_3 ct_w3g
W2 C.T. GROUND RATIO
_________________ :1
W3 C.T. RATIO
ct_w2g CT_W2 ct_w3g
W3 C.T. RATIO
_________________ :1
W3 C.T. GROUND RATIO
ct_w2g ct_3 CT_W3G
W3 C.T. GROUND RATIO
_________________ :1
W4 C.T. RATIO
CT_W4 ct_w4g
W4 C.T. RATIO
_________________ :1
W4 C.T. GROUND RATIO
ct_w4g CT_W4G
W4 C.T. GROUND RATIO
_________________ :1
CT Phase Ratio
CT Ground Ratio
VT Ratio
VT Ground Ratio
CT Ratios
CT Ground Ratios
The relay will calculate the W2, W3 and W4 line currents
when a delta CT configuration is selected, as follows:
For Delta ab CTs:
Line Current
I
A
= (I
ab
–I
ca
+ (I
g
/CTCF))/3
Line Current
I
B
= (I
bc
– I
ab
+ (I
g
/CTCF))/3
Line Current
I
C
= (I
ca
– I
bc
+ (I
g
/CTCF))/3
where
I
ab
, I
bc
, I
ca
are the currents that enter the relay, and
I
g
is the measured ground current.
CTCF is given by
4 Winding Setup (Cont.’d)
Summary of Contents for M?3311A
Page 1: ...Instruction Book M 3311A Transformer Protection Relay ...
Page 30: ... 29 M 3311A Transformer Protection Relay This Page Left Intentionally Blank ...
Page 55: ...M 3311A Instruction Book 1 6 This Page Left Intentionally Blank ...
Page 87: ...M 3311A Instruction Book 2 32 This Page Left Intentionally Blank ...
Page 89: ...M 3311A Instruction Book 3 2 Figure 3 2 IPScom Main Screen ...
Page 107: ...M 3311A Instruction Book 3 20 Figure 3 22 Setup System Dialog Screen 2 3 Winding ...
Page 108: ...IPScom 3 3 21 Figure 3 23 Setup System Dialog Screen 4 Winding ...
Page 112: ...IPScom 3 3 25 Figure 3 29 I O Map Screen 4 Winding ...
Page 114: ...IPScom 3 3 27 Figure 3 31 Display All Setpoints Screen 4 Winding ...
Page 119: ...M 3311A Instruction Book 3 32 Figure 3 38 View Sequence of Events Recorder Screen ...
Page 127: ...M 3311A Instruction Book 3 40 This Page Left Intentionally Blank ...
Page 150: ...4 23 System Setup and Setpoints 4 Figure 4 14 Setup Sequence of Events Recorder Dialog Screen ...
Page 163: ...4 36 M 3311A Instruction Book Figure 4 15 IPScom Relay Setup System Dialog Screen 2 3 Winding ...
Page 166: ...4 39 System Setup and Setpoints 4 Figure 4 18 IPScom Selection Screen for Input Settings ...
Page 179: ...4 52 M 3311A Instruction Book Figure 4 28 Example of V Hz Capability and Protection Curves ...
Page 187: ...4 60 M 3311A Instruction Book Figure 4 33 49 Function Overload Curves ...
Page 229: ...4 102 M 3311A Instruction Book Table 4 5 Transformer Connections ...
Page 231: ...4 104 M 3311A Instruction Book Table 4 7 Custom Transformer and CT Configuration ...
Page 243: ...M 3311A Instruction Book 5 6 Figure 5 5 Mounting Dimensions for GE L 2 Cabinet H3 and H4 ...
Page 383: ...A 50 M 3311A Instruction Book This Page Left Intentionally Blank ...
Page 389: ...M 3311A Instruction Book B 6 This Page Left Intentionally Blank ...
Page 393: ...D 2 M 3311A Instruction Book Figure D 1 Volts Hz 24IT Inverse Curve Family 1 Inverse Square ...
Page 394: ...Inverse Time Curves Appendix D D 3 Figure D 2 Volts Hz 24IT Inverse Family Curve 2 ...
Page 395: ...D 4 M 3311A Instruction Book Figure D 3 Volts Hz 24IT Inverse Time Curve Family 3 ...
Page 396: ...Inverse Time Curves Appendix D D 5 Figure D 4 Volts Hz 24IT Inverse Curve Family 4 ...
Page 399: ...D 8 M 3311A Instruction Book Figure D 5 Definite Time Overcurrent Curve ...
Page 400: ...Inverse Time Curves Appendix D D 9 Figure D 6 Inverse Time Overcurrent Curve ...
Page 401: ...D 10 M 3311A Instruction Book Figure D 7 Very Inverse Time Overcurrent Curve ...
Page 402: ...Inverse Time Curves Appendix D D 11 Figure D 8 Extremely Inverse Time Overcurrent Curve ...
Page 439: ...F 28 M 3311A Instruction Book This Page Left Intentionally Blank ...