Testing – 6
6–29
49 Winding Thermal Protection
VOLTAGE INPUTS:
None
CURRENT INPUTS:
Configuration C1, C2, C3 or C4
TEST SETTINGS:
Time Constant
τ
Minutes
(1.0 to 999.9)
Max Overload Current
I
max
Amps
(1.00 to 10.00)
1 Amp CT Rating
(0.20 to 2.00)
Current Selection
(Sum1,Sum2,W1,W2,W3,W4)
Programmed Outputs
Z
OUT
(1 to 8)
Expanded I/O
(9 to 16)
Function 46DT, 49
Disable
Function 50BF
Disable
Function 50W2/W3/W4
Disable
Function 51
Disable
Function 87H/87T
Disable
Function 87GD
Disable
Test Setup:
1.
Determine the Function 49 Thermal Overload settings to be tested. This test requires that the
values for the following elements (described in detail in Chapter 4,
System Setup and Setpoints
)
be determined:
• t
= time to trip
•
τ
= time constant
•
I
load
= relay current
•
I
preload
= pre-load current
•
I
max
= maximum allowed continuous overload current
2.
Enter the Function 49 Thermal Overload settings to be tested utilizing either the HMI or IPScom
®
Communications Software.
3.
Connect test current inputs as shown in Figure 6-13, Current Inputs: Configuration C1.
4. Calculate
t
(time to trip in minutes) for the desired test settings as follows:
Where: t
= time to trip
τ
= time constant
I
load
= relay current
I
preload
= pre-load current
I
max
= maximum allowed continuous overload current
Pickup Test
:
1. Press and hold the
TARGET RESET
pushbutton, then slowly increase the current until the
49 WINDING THERMAL
LED illuminates or the pickup indicator illuminates on the IPScom
Function Status screen.
The current level of operation will be (
I
max
) Amps
0.1 A or
2% (
0.02 Amp for 1 A CT).
2.
Release the
TARGET RESET
pushbutton, then decrease the current. The
OUTPUT
LED will
extinguish.
3. Press
TARGET RESET
button to remove targets.
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 ...