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National Electric Energy Testing, Research & Applications Center
HIGH POWER TESTING SERVICES

Circuit Breakers. . . . . Switchgear. . . . . Separable Connectors. . . . . Fault Interrupters
Reclosers. . . . . Fuses. . . . . Switches. . . . . Grounding Connectors/Clamps

OVERVIEW

High Power testing is a critical part of the process to evaluate the design and reliability of transmission and distribution system components. In these tests, full system voltage is applied simultaneously with current, simulating actual service conditions. NEETRAC provides High Power testing services to our Members through a cooperative agreement with the S&C Electric Company. The facility, known as the Advanced Technology Center (ATC) located in Chicago, provides a comprehensive package of high power testing capabilities with two 850 MVA short-circuit test generators that can supply up to 100 kA and up to 230,000 volts.

ATC Facility

CAPABILITIES

Circuit Breaker and Recloser
3 3-ph Tests
Rated Voltage, kV
Maximum Current, kA
15
31.5
17
25
27
25
38
15

Circuit Breaker 1 3-ph Tests
Rated Voltage (kV)
Test Voltage (kV)
Maximum Current (kA)
15.5
13.4
63
29
23.5
31.5
38
32.9
25

Ten-Cycle Durations
Three-Phase Momentary/Peak
Withstand Maximum Current, kA
Current Fault Current
Peak Currenty Mitigated By Switched Inductors
Current Droops to 80%
40
80
100
Short-Time Withstand Maximum Current, kA
Two-Second Dursation
Three-Second Duration
100
80

Load Break 3 3-ph Switch Tests
Rated/Test Voltage (kV)
Maximum Current (kA)
15.5
2
29
2
38
1.2
Fault Closing
Rated Voltage (kV)
Test Voltage (kV)
Maximum Current (kA)
15
9
63/80//100
15.5/27
15.5
40/50/63
27
27
25/31/40
38
22
25/31.5/40
38
38
12.5/16/20

Arcing Fault Three-Phase, 0.5 Second Tests
Rated Voltage (kV)
Test Voltage (kV)
Maximum Current (kA)
15
15
40
15
7.9
63
27
27
25
27
15.5
40
38
38
12.5
38
27
25

Notes for all listed testing capabilities:

  1. All current ratings are symmetrical. In each instance, the first peak asymmet rical current is 2.7 times the symmetrical current unless the current is controlled by additional circuit resistors or switch peak-current limiting inductors.
  2. Single-phase testing at phase-to-ground voltage is permissible for single-phase switches.
  3. Multiple current capability varies with standard requirements X/Y/Z, where:

........X  = Constant fault current;
........Y = Peak current mitigated by switched inductors;
........Z  = Current droops to 80% at 10 cycles.

CONFIDENTIALITY

The ATC high power test facility was designed with confidentiality in mind. A separate control room is used for all NEETRAC tests. All results are recorded on computers owned by NEETRAC. Trained NEETRAC staff are available to oversee all work performed for our Members, analyze all results and prepare the test report. All paperwork and devices associated with NEETRAC tests are given a generic ID number. Confidentiality is a high priority when performing High Power tests at the ATC!

850 MVA Short-Circuit Generators

TEST PROGRAMS

NEETRAC is ready to work with our Members to perform high power tests according to industry standards, or we can develop customized test programs to assess specific equipment performance characteristics.

Both NEETRAC and S&C are in the process of becoming ISO 17025 certified for high power testing. This will help assure our Members that all tests are accurate and performed to industry standards.

ATC Test Bay

Last revised on November 29, 2011