INDEX
SECTION-1 INTRODUCTION
SECTION-2 SAFETY
SECTION-3 MECHANICAL CHECKS AND VISUAL INSPECTION
SECTION-4 INSULATION RESISTANCE TEST
SECTION-5 HIGH VOLTAGE TEST
SECTION-6 CURRENT TRANSFORMER TEST
SECTION-7 VOLTAGE TRANSFORMER TEST
SECTION-8 POWER TRANSFORMER TEST
SECTION-9 METAL CLAD SWITCHGEAR
SECTION-10 CIRCUIT BREAKER / CONTACTOR
SECTION-11 DISCONNECTOR / GROUND SWITCH
SECTION-11 DISCONNECTOR / GROUND SWITCH
SECTION-12 PROTECTIVE RELAY
SECTION-12 PROTECTIVE RELAY
SECTION-13 MEASURING INSTRUMENTS
SECTION-14 PROTECTION FUNCTION TEST
SECTION-15 POWER CABLE TEST
SECTION-16 STATION DC SYSYTEM
SECTION-17 TRANSFORMER OIL TEST
SECTION-18 SCHEME VERIFICATION TEST
SECTION-19 COMMISSIONING TEST
Section - 1
The purpose of these specifications is to assure that all tested electrical
equipment and systems supplied by either contractor or owner are
operational and within applicable standards and manufacturer’s tolerances
and that equipment and systems are installed in accordance with design
specifications.
The need for acceptance testing of electrical power systems is very clear to those with extensive start-up and/or operating experience. Shipping and installation damage, field and factory wiring errors, manufacturing defects, and systems and components not in accordance with drawings and specifications are some of the many problems that can be detected by appropriate testing. When these defects are found before start-up they can be corrected under warranty and without the safety hazards and possible equipment and consequential damages of loss of use/production that can occur if discovered after startup or energizing. In addition, test results obtained during acceptance testing are invaluable as base reference data for the periodic testing that is an essential element of an effective maintenance program. This document lists a majority of the field test available for assessing the suitability for service and reliability of the power distribution system. Certain tests have been assigned an “optional” classification. The following considerations were used in determining the use of the “optional”
classification:
1. Did another test listed provide similar information?
2. How did the cost of the test compare to the cost of other tests providing
similar information?
3. How commonplace was the test procedure? Is it new technology?
While acknowledging the above, it is still necessary to make an informed judgment for each particular system regarding how extensive the testing should be. The approach taken in these specifications is to present a comprehensive series of tests that is applicable to most industrial and larger commercial systems. The guidance of an experienced testing professional should be sought when making decisions such as how extensive testing should be. In smaller systems some of the tests can be deleted. In other cases, a number of the tests indicated as optional should be performed. As a further note, it is important to follow the recommendations contained in the manufacturer’s instruction manuals. Many of the details of a complete and effective acceptance testing procedure can only be obtained from that
source.
This document details the Field inspection, testing and commissioning
procedures that must be followed during commissioning and startup of
electrical equipment. These inspections and tests are performed on new
equipment, after installation and prior to energizing, in order to confirm that:
1. The equipment has not been damaged during shipment or installation.
2. The equipment is in compliance with the purchase specification and design
intent.
3. Documented test records that can serve as benchmarks for future tests.
For testing of equipment detailed in this document, Schneider Services will
refer to the InterNational Electrical Testing Association’s (NETA) guidelines in
Acceptance Testing Specifications for Electrical Power Distribution Equipment
and Systems (NETA ATS 1999).
Section -2 Safety
Proper safety procedures shall be reviewed and followed before each activity
listed in this procedure. Job Safety Analysis followed by a toolbox/pre-job
meeting shall be conducted prior to any activity listed in this procedure. Proper safety procedures as detailed in the Square D/Schneider Electric “Field Services Safety, Health and Environmental Handbook”, employee training,
and customers requirements shall be implemented as dictated by each sites
requirements.
Services Employees are NOT authorized to work on live equipment. There may
be occasions in which you are taking measurements or checking voltages
within an energized enclosure, but you are NOT authorized to “do Hands on Live” repairs! Company representative does not typically perform shutdown and/or switching operations, because these operations may result in damage to property or persons downstream of the equipment as a result of conduct, errors, or omissions made by others. If a customer requests Company representative to perform such services, technicians must contact their Manager for approval and proper procedures.
Electrical equipment testing and commissioning refers to the process of verifying that electrical equipment and systems are designed, installed, and function in accordance with the specified requirements and industry standards. This process helps ensure that the equipment is safe to use and operates efficiently.
The testing and commissioning process usually involves several stages, including visual inspections, continuity tests, insulation resistance tests, earth resistance tests, and high voltage tests. These tests are performed to confirm that the equipment is free from defects and faults and that the protective devices such as circuit breakers and earth leakage protection are working correctly.
The commissioning process is typically carried out by a team of qualified and experienced electrical engineers and technicians. They use specialized tools and equipment to conduct the tests, and they also perform functional tests to ensure that the equipment meets the requirements specified in the design and project specifications.
In addition to ensuring that the equipment is safe and reliable, the testing and commissioning process also provides valuable information that can be used to optimize the performance of the equipment and improve its efficiency. This information can also be used to identify areas for improvement and to plan for future maintenance and upgrades.
In conclusion, electrical equipment testing and commissioning is a critical step in the electrical installation process. It helps ensure that the equipment is safe, reliable, and efficient, and provides valuable information for ongoing maintenance and improvement.
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