Issue:
Does Square D PI test molded case circuit breakers (MCCB) at time of manufacture?
Product Line:
Molded Case circuit breakers
Environment:
Testing
Resolution:
Square D Powerpact and the Masterpact NT and NW breakers are primary injection tested at the time of manufacture, to ensure they meet published trip curves.
Masterpact MTZ breakers are NOT high current primary injection tested at final assembly. Sub systems like the CT's and control unit are tested at their respective manufacturing locations. The metering chain (CT to control unit) is verified using low current injection (around 200 amps) to verify metering on the HMI. Also, the control unit continuously monitors the health of the metering chain.
Does Square D PI test molded case circuit breakers (MCCB) at time of manufacture?
Product Line:
Molded Case circuit breakers
Environment:
Testing
Resolution:
Square D Powerpact and the Masterpact NT and NW breakers are primary injection tested at the time of manufacture, to ensure they meet published trip curves.
Masterpact MTZ breakers are NOT high current primary injection tested at final assembly. Sub systems like the CT's and control unit are tested at their respective manufacturing locations. The metering chain (CT to control unit) is verified using low current injection (around 200 amps) to verify metering on the HMI. Also, the control unit continuously monitors the health of the metering chain.
Released for:Schneider Electric Canada
