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6.1 LPS-D FUNCTIONAL TESTS
a) DRAWINGS
The following drawings should be used for reference during testing:
Elementary Diagrams
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Figure 1–22: ELEMENTARY DIAGRAM WITH DEFAULT I/O ASSIGNMENTS on page 1–47
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Figure 1–23: ELEMENTARY DIAGRAM on page 1–48
Logic Diagrams
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Figure 1–3: POTENTIAL FUSE FAILURE LOGIC DIAGRAMS on page 1–13
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Figure 1–4: LINE PICKUP LOGIC DIAGRAM on page 1–14
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Figure 1–5: REMOTE-OPEN DETECTOR LOGIC on page 1–15
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Figure 1–7: OSB LOGIC DIAGRAMS on page 1–17
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Figure 1–9: STEP DISTANCE LOGIC DIAGRAM on page 1–27
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Figure 1–11: PUTT LOGIC DIAGRAM on page 1–29
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Figure 1–12: PERMISSIVE OVERREACH TRANSFER TRIP (POTT1) on page 1–31
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Figure 1–13: POTT WITH BLOCKING FUNCTIONS (POTT2) LOGIC DIAGRAM on page 1–32
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Figure 1–14: BLOCKING SCHEME LOGIC DIAGRAM on page 1–34
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Figure 1–17: HYBRID LOGIC DIAGRAM on page 1–37
51G curves
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Figure 2–15: INVERSE CURVE on page 2–49
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Figure 2–16: VERY INVERSE CURVE on page 2–50
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Figure 2–17: EXTREMELY INVERSE CURVE on page 2–51
b) REFERENCE
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Chapter 11: ALPS-LINK USER GUIDE
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Chapter 12: ASCII COMMUNICATIONS
Tests are performed in test mode, which allows viewing of the internal measuring units and functions. The
measuring units and functions are actually internal to the software. There are no individual hardware modules
that are responsible for the specific measuring functions.
The test mode selects and isolates various test functions and measuring units, then routes their status to the
A1 (A9–A25) contact. When the particular function under test has picked up, the A1 contact closes. Target
information is displayed for tests that cause tripping.
Testing can be performed with outputs disabled. The A1 contact still closes when a trip condition exists; how-
ever, the tripping contacts do not operate. Disabling outputs can be accomplished when test mode is entered.
The A1 contact will chatter when the unit under test is near its threshold. Do not let it continue
to chatter! Remove the test current. A single contact closure is enough to determine that the
unit picked up.
CAUTION
6-
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6 FUNCTIONAL TESTS (USER SETTINGS)
LPS-D Line Protection System
6.1.2 DRAWINGS AND REFERENCES
6.1.3 GENERAL INSTRUCTIONS
GE Power Management
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