CHAPTER 7: TESTING
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
7–13
(EQ 7.2)
Given the values in the figure above, we have:
(EQ 7.3)
If FLA = 1000, then:
(EQ 7.4)
and since
, the 469 unbalance is:
(EQ 7.5)
The 469 specification for unbalance accuracy is
±
2%. Perform the steps below to verify
accuracy.
Z
Alter the following settings:
S2 SYSTEM SETUP
Z
CURRENT SENSING
Z
PHASE CT PRIMARY:
“1000 A”
S2 SYSTEM SETUP
Z
CURRENT SENSING
ZV
MOTOR FULL LOAD AMPS FLA:
“1000 A”
Z
Inject the values shown in the table below.
Z
Verify accuracy of the measured values.
Z
View the measured values in:
A2 METERING DATA
Z
CURRENT METERING
7.3.4
Voltage Phase Reversal Test
The 469 can detect voltage phase rotation and protect against phase reversal. To test the
phase reversal element, perform the following steps:
Z
Alter the following settings:
INJECTED CURRENT
EXPECTED
UNBALANCE
LEVEL
MEASURED
UNBALANCE
LEVEL
1 A UNIT
5 A UNIT
Ia = 0.78 A
∠
0
°
Ib = 1 A
∠
113
°
Ic = 1 A
∠
247
°
Ia = 3.9 A
∠
0
°
Ib = 5 A
∠
113
°
Ic = 5 A
∠
247
°
14%
Ia = 1.56 A
∠
0
°
Ib = 2 A
∠
247
°
Ic = 2 A
∠
113
°
Ia = 7.8 A
∠
0
°
Ib = 10 A
∠
247
°
Ic = 10 A
∠
113
°
15%
Ia = 0.39 A
∠
0
°
Ib = 0.5 A
∠
247
°
Ic = 0.5 A
∠
113
°
Ia = 1.95 A
∠
0
°
Ib = 2.5 A
∠
247
°
Ic = 2.5 A
∠
113
°
7%
I
2
I
1
----
1
3
---
I
a
a
2
I
b
aI
c
+
+
(
)
1
3
---
I
a
aI
b
a
2
I
c
+
+
(
)
-------------------------------------------
=
where
a
1 120
°
∠
0.5
–
j
0.886
+
=
=
I
2
I
1
----
780 0
°
∠
1 120
°
∠
(
)
2
1000
113
°
–
∠
(
)
1 120
°
∠
(
)
1000 113
°
∠
(
)
+
+
780 0
°
∠
1 120
°
∠
(
)
1000
113
°
–
∠
(
)
1 120
°
∠
(
)
2
1000 113
°
∠
(
)
+
+
----------------------------------------------------------------------------------------------------------------------------------------------------------------
=
780 0
°
∠
1000 127
°
∠
1000 233
°
∠
+
+
780 0
°
∠
1000 7
°
∠
1000 353
°
∠
+
+
---------------------------------------------------------------------------------------------
=
780 601.8
–
j
798.6 601.8
–
j
798.6
–
+
780 992.5
j
121.9 992.5
j
121.9
–
+
+
+
---------------------------------------------------------------------------------------------
423.6
–
2765
-----------------
=
=
0.1532
=
I
avg
780 1000 1000
+
+
3
-----------------------------------------------
A
926.7 A
=
=
I
avg
926.7 A 1000
<
FLA
=
=
469 Unbalance
0.1532
–
926.7
1000
-------------
100%
×
×
14.2%
=
=
Summary of Contents for 469
Page 62: ...2 16 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 2 INTRODUCTION ...
Page 90: ...3 28 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 3 INSTALLATION ...
Page 292: ...6 42 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 6 ACTUAL VALUES ...
Page 313: ...A APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL A 7 HGF5C 808841A1 HGF8 808842A1 ...
Page 315: ...A APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL A 9 808712A1 CDR ...
Page 320: ...A 14 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL A APPENDIX ...