M‑3311A Instruction Book
6–38
51G Inverse Time Ground Overcurrent
VOLTAGE INPUTS:
None
CURRENT INPUTS:
Configuration C5
TEST SETTINGS:
51GW2/W3/W4 Pickup
P
Amps
(0.50 to 12.00)
1 Amp CT Rating
(0.1 to 2.4)
Standard Inverse Time Curves:
1
Curve
C
(1 to 4)
Time Dial
TD
(0.5 to 11.0)
IEC Inverse Time Curves:
1
IEC Curve
C
(5 to 8)
IEC Time Dial
TD
(0.05 to 1.10)
IEEE Inverse Time Curves:
1
IEEE Curve
C
(9 to 11)
IEEE Time Dial
(0.5 to 15.0)
Programmed Outputs
Z
OUT
(1 to 8)
Expanded I/O
(9 to 16)
Function 50G
Disable
Function 87GD
Disable
1. Disable functions as shown. Refer to Section 4.4,
System Setpoints
, for procedures.
2. Confirm settings to be tested. Only the winding being tested should be enabled; the others should
be disabled.
3. Connect current inputs in Configuration C5 as designated previously. See Section 6.4,
Input
Configurations
, for configurations.
4.
Refer to Appendix D. Calculate test times for levels represented on the graphs. It is suggested
that 4 or 5 test levels be chosen.
t = time in seconds TD = Time Dial setting M = current in multiples of pickup
5.
Time Test
: With output contacts connected to the timer, apply currents used in calculations from
Step 4 and start timing while observing selected winding target
LED for pickup. The operating
time will be (
D
) cycles within
3 cycles or
3% of calculated time.
6.
Repeat Step 5 for each test level chosen.
7.
Repeat Steps 4, 5 & 6 using Currents
I
GW3
,
I
GW4
while observing the selected winding target LED
for pickup.
8. If testing is complete, enable any functions disabled for this test. If further testing is desired, check
the proper functions to disable for the next test and continue from this configuration.
1
Either a Standard Curve, IEC Curve or IEEE Curve must be selected.
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 ...