Looking for high current testing standard for breakers

[SecondGen]

There isn't anything I know of that comes directly from NETA covering circuit breaker primary injection testing procedures. NETA specs usually tell you to consult manufacturers recommendations for specific procedures.

[CoDylan]

NETA Tests for Low-Voltage Power Circuit Breaker (LSIG):
1. Determine long-time pickup and delay by primary current injection.
2. Determine short-time pickup and delay by primary current injection.
3. Determine ground-fault pickup and delay by primary current injection.
4. Determine instantaneous pickup current by primary current injection.

NETA Test Results for Low-Voltage Power Circuit Breaker (LSIG):
1. Long-time pickup values should be as specified, and the trip characteristic shall not exceed manufacturer’s published time-current characteristic tolerance band.
2. Short-time pickup values should be as specified, and the trip characteristic should not exceed manufacturer’s published time-current tolerance band.
3. Ground fault pickup values should be as specified, and the trip characteristic should not exceed manufacturer’s published time-current tolerance band.
4. Instantaneous pickup values should be within the tolerances of manufacturer’s published data.

The reason why there is not a test percentage within the NETA specifications is that the expectation is the unit will function as specified at any point of the time-current curve or manufacturer's tolerance, not just at one specific value. Although it is common industry practice to test long time at 300% of pickup and short time and ground fault at 150% of pickup. Instantaneous is per the curve tolerance.

[JohnRaz]

TABLE 100.7 deals with Inverse Time Trip Tests
at 300% of Rated Continuous Current Molded-Case Circuit Breakers.
Maximum trip times

[JohnRaz]

TABLE 100.8 deals with Instantaneous Trip Tolerances
for Field Testing of Circuit Breakers

[luhanson1]

NFPA-70B explains low voltage breaker testing a little clearer than NETA.