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4 ACCEPTANCE/PERIODIC TESTS
4 ACCEPTANCE/PERIODIC TESTS 4.1 OVERVIEW
Remove all power from the relay by disconnecting the DC control power and removing all voltage inputs to
the rear terminals prior to opening the unit. Dangerous or lethal voltages may be present inside the unit
WARNING
even if the power switch is OFF.
This section is a guide for testing the ALPS. These tests are not necessary for incoming inspection. The relay was tested at
the factory with automated test equipment. The ALPS is controlled by self-checking software. If a system failure is
detected, it is reported through the display and Status LED.
The tests in this section include self-tests of the relay status, display, and Keypad/Display Interface. Tests of backup protec-
tion functions, measuring units, and zone timers are also included, and can be performed at the customer's discretion.
General Relay Tests:
•
T1 – Relay Status and Display Tests (Self Tests)
•
T2 – Digital Output Tests
•
T3 – Configurable Input and Output Tests
•
T4 – AC System Input Test
The following test equipment is required:
•
A three-phase source of voltage and current at rated frequency.
•
A DC Control voltage source.
•
Three AC voltmeters.
•
Three AC ammeters.
•
A continuity tester or ohmmeter.
•
An IBM PC-compatible computer with a serial port and mouse.
•
An RS232 null modem cable to connect the PC to the ALPS.
•
A precision timer for testing timed events.
The specific equipment requirements are listed in the instructions for each test and in the associated circuit diagrams. The
three-phase AC sinusoidal voltage must be balanced and undistorted. Similarly, the DC power should come from a "good"
source with less than 5% ripple. A good source is within the voltage range listed in Chapter 7: SPECIFICATIONS.
Alternatively, a three-phase electronic test source may be used. In many cases, these devices allow simplification of the
test circuits.
The following drawings should be used for reference during testing.
Elementary Diagrams
•
Figure 1–27: ELEMENTARY DIAGRAM WITH DEFAULT I/O (SINGLE PHASE TRIPPING) on page 1–49
•
Figure 1–28: ELEMENTARY DIAGRAM WITH DEFAULT I/O (THREE PHASE TRIPPING) on page 1–50
•
Figure 1–29: ELEMENTARY DIAGRAM (SINGLE PHASE TRIPPING) on page 1–51
•
Figure 1–30: ELEMENTARY DIAGRAM (THREE PHASE TRIPPING) on page 1–52
Logic Diagrams:
•
Figure 1–3: POTENTIAL FUSE FAILURE LOGIC DIAGRAMS on page 1–11
•
Figure 1–4: LINE PICKUP LOGIC DIAGRAM (THREE PHASE TRIPPING) on page 1–12
•
Figure 1–5: LINE PICKUP LOGIC DIAGRAM (SINGLE PHASE TRIPPING) on page 1–13
GE Power Management
ALPS Advanced Line Protection System
4.1 OVERVIEW
4.1.1 INTRODUCTION
4.1.2 TEST EQUIPMENT
4.1.3 DRAWINGS AND REFERENCES
4
4-1
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