M‑3311A Instruction Book
6–48
b. Choose any values for
I
AW2
(Input 2) and calculate the expected
I
AW1
(Input 1) according to
the following:
S1
and
S2
= slope in % from above. The differential current,
I
AW1
–
I
AW2
must be greater than both
the minimum pickup current (
P
) and the
BP
values. Select
I
AW2
> (BP - ). Monitor the restraint
current using either the HMI or IPScom
®
Secondary Metering and Status Screen. The magnitude
of
I
AW2
should be high enough that the restraint current is greater than
BP
.
c. Set
I
AW1
(Input 1) and
I
AW2
(Input 2) to the chosen value.
d. Press and hold the
TARGET RESET
button, then slowly increase
I
AW1
(Input 1) current until
the
PHASE DIFFERENTIAL
87T/H
LED illuminates or the pickup indicator operates on the
computer target screen. The level of operation should be equal to (
P
) PU
0.02 PU or
1%.
e. Release the
TARGET RESET
button, then decrease the current. The
OUTPUT
LED will
extinguish.
f. Press the
TARGET RESET
button to remove targets. This test may be repeated for testing
the opposite winding or another phase.
7.
Second Harmonic Restraint Test
a. Ensure that Even Harmonic Restraint is enabled with the amplitude of
I
AW1
(Input 1) at 60
Hz (or 50 Hz) set to 10% above (
P
) PU setting and verify that the
PHASE DIFFERENTIAL
87T/H
LED illuminates.
b. Apply 0 Amps at 120 Hz (100 Hz for 50 Hz units) to
I
AW2
(Input 2).
c. Press and hold the
TARGET RESET
button in, then slowly increase the amplitude of
I
AW1
until the
PHASE DIFFERENTIAL
87T/H
LED extinguishes. This level will be (
E
) times (
P
)
PU,
1% or
0.1A.
8.
Fourth Harmonic Restraint Test
:
a. Ensure that Even Harmonic Restraint is enabled with the amplitude of
I
AW1
(Input 1) at 60 Hz
(or 50 Hz) set to 10% above
P
PU setting and verify the
PHASE DIFFERENTIAL
87T/H
LED
is illuminated.
b. Apply 0 Amps at 240 Hz (200 Hz for 50 Hz units) to
I
AW2
(Input 2).
c. Press and hold the
TARGET RESET
button in, then slowly increase the amplitude of the 4
th
Harmonic current
I
AW2
until the
PHASE DIFFERENTIAL
87T/H
LED extinguishes. This level
will be (
E
) times (
P
) PU,
1%.
9.
Fifth Harmonic Restraint Test:
a. Ensure that 5th Harmonic Restraint is enabled with the amplitude of
I
AW1
(Input 1) at 60 Hz (or
50 Hz) set to above (
P
)
PU, and below (
FP
)
PU settings and verify the
PHASE DIFFERENTIAL
87T/H
LED is illuminated.
b. Apply (
P
) times (
F
) +10% Amps at 300 Hz (250 Hz for 50 Hz units) to
I
AW2
(Input 2), and verify
that the
PHASE DIFFERENTIAL
87T/H
LED extinguishes.
c. Press and hold the
TARGET RESET
button in, then slowly decrease the amplitude of the 5
th
Harmonic current
I
AW2
until the
PHASE DIFFERENTIAL
87T/H
LED illuminates. This level
will be (
F
) times (
P
) PU,
1% or
0.1A.
10.
Elevated Pickup at 5
th
Harmonic Restraint Test
a. Ensure that 5
th
Harmonic Restraint is enabled with 60 Hz (or 50 Hz) with the amplitude
of
I
AW1
(Input 1) at 60 Hz ( or 50 Hz) set to 10% above
(P)
PU and verify that the
PHASE
DIFFERENTIAL
87T/H
LED illuminates.
b. Apply (
P
) times (
F
) + 10% Amps at 300 Hz (250 Hz for 50 Hz units) to
I
AW2
(Input 2), then
verify that the
PHASE DIFFERENTIAL
87T/H
LED extinguishes.
c. Use the HMI or IPScom to enable cross phase averaging. Slowly increase the amplitude of
I
BW1
(Input 3) and verify the
PHASE DIFFERENTIAL
87T/H
LED illuminates. This level will
be
FP
,
0.1 PU or
5%.
11. 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.
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 ...