Compact® NSF and NSJ 150 to 600 A Circuit Breakers

 

Section 13—Supplementary Technical Information

Dielectric

After testing, the circuit breaker must withstand for one minute a voltage of 1000 V plus twice the rated

 

voltage between:

 

Line and load terminals with circuit breaker in open, tripped and off positions

 

Terminals of opposite polarity with circuit breaker closed

 

Live parts and the overall enclosure with circuit breaker open and closed

Optional Tests

High available fault current—circuit breakers having passed all the standard tests may have the UL

 

Listing label applied at higher values than the standard; test sequence is as follows:

200% calibration

Interrupting capacity: an opening operation followed by a close-open operation (O-and-CO) on all poles are performed on the circuit breaker

The power factor over 20000 A shall be 0.15–0.2 lagging:

Trip out at 250%

Dielectric at twice the rated test voltage

100% rated—circuit breakers having passed all the standard tests may have the UL Listing label applied to use the circuit breaker in an enclosure when carrying 100% of its maximum rating

 

The circuit breaker is submitted to additional temperature tests performed as standard tests, except

 

that the circuit breaker is installed in an enclosure. The dimensions and possible ventilations shall be

 

recorded and shall be marked on the circuit breaker.

Tests On

Shunt trip and Undervoltage Trip—these devices are submitted to temperature, overvoltage, operation,

Accessories

endurance and dielectric tests.

 

Overvoltage Test—the device must be capable of withstanding 110% of its rated voltage continuously

 

without damage (this test does not apply to a shunt trip with an "a" contact connected in series).

 

Operation:

 

Shunt Trip—must operate at 75% of its rated voltage (except shunt trip devices for use with ground-

 

fault protection shall operate at 55%).

 

Undervoltage Trip—must trip the circuit breaker when the voltage is less than 35% and may trip the

 

circuit breaker between 35 and 70% of its rated voltage and shall pick-up and seal when the voltage

 

is at 85% or more of its rated voltage.

 

Endurance—the device must be capable of performing successfully for 10% of the number of "with

 

current" operations of the circuit breaker.

 

Auxiliary and Alarm Switches—auxiliary and alarm switches must be submitted to temperature,

 

overload, endurance and dielectric tests.

 

Overload Test—the test consists of fifty operations making and breaking 150% of rated current at rated

 

voltage, with a 75–80% power factor in ac and non-inductive load in dc.

 

Endurance—the switch must make and break its rated current at rated voltage, with a 75–80% power

 

factor in ac, and non-inductive load in dc for 100% of the number of operations "with current" for

 

auxiliary switches, and 10% of this number for alarm switches.

 

Motor Operator—the motor operator shall perform the number of "without current" operations indicated

 

for the circuit breaker endurance tests. The first 25 operations shall be conducted at 85% of the motor

 

operator voltage rating. The circuit breaker is to be tripped during these tests. The next 25 operations

 

shall be conducted at 110% of the motor operator voltage rating. The balance shall be completed at

 

rated voltage without tripping the circuit breaker.

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Schneider Electric Class 615 dimensions Dielectric, Optional Tests, Tests On, Accessories