UL-2831:2013 pdf free download – Standard for Sustainability for Septic T ank Additives: Alternative.
7.2.4 Voltage spike
7.2.4.1 Circuit breakers with electronic devices shall withstand voltage spikes on control power devices in accordance with MIL-STD-1399-300. Voltage spikes shall not cause mal-operation of the circuit breaker including accessories and functional components.
7.2.5 Verification of accessories and functional components
7.2.5.1 Electric closing devices, trip devices, auxiliary switches, secondary disconnecting devices, and mechanical position indicators shall be tested to verify they operate in accordance with requirements specified herein.
7.2.5.2 Electric closing device operating voltage range/closing time. With the circuit breaker initially in the open state, the rated minimum, nominal, and maximum operating voltages in the specified range shall be applied to the electric closing device during three separate checks. The electric closing device shall close the circuit breaker during each check. Closing time shall not exceed 0.100 seconds during any check. Closing time shall be measured from the initial rise in the close signal voltage to the first indication of continuity across the circuit breaker poles and auxiliary switches. In addition, pole synchronization (first indication of continuity across the circuit breaker poles) of main contacts shall be verified to be within 1 .5 ms of all readings.
7.2.5.3 Shunt trip voltage range/tripping current. With the circuit breaker in the closed state, the rated minimum, nominal, and maximum rated operating voltage in the specified range shall be applied to the shunt trip device during three separate checks. The circuit breaker shall trip during each check and the opening time shall not exceed 0.050 second during any check. Opening time shall be measured from the initial rise in the open signal voltage to the first indication of loss of continuity across the circuit breaker poles and auxiliary switches. In addition, pole synchronization (first indication of continuity across the circuit breaker poles) of main contacts shall be verified to be within 1 .5 ms of all readings.
7.2.5.4 Mechanical position indicator, auxiliary switch operation, and operations counter. The circuit breaker shall be cycled electrically and the following criteria met:
a) The mechanical position indicator shall be visually verified to have shown the proper position of the main contacts (open/closed) as the circuit breaker is cycled.
b) One “a” (normally closed) and one “b” (normally open) auxiliary switch shall be verified by measurement to have changed state with the circuit breaker main contacts when the circuit
breaker is cycled.
c) Operation counter shall accurately advance while cycling.
7.2.5.5 Racking position indicator and cell switch. It shall be verified that the rack-in/rack-out position indicator shows the correct circuit breaker position during a complete rack-out and rack-in cycle. A cell switch shall be verified by measurement to be in the open state when the circuit breaker is in the connected position and closed state when the circuit breaker is in the test and disconnected position.
7.2.5.6 Cradle interlocks. It shall be verified that a circuit breaker in the closed state shall not be able to be racked-in to the connected position and a circuit breaker in the closed state shall not be able to be racked out from the connected position. It shall also be verified that a circuit breaker shall not be put into the closed state when attempting to close approximately at the midpoint racking travel between connected and test positions and between test and disconnected positions.
7.2.6 Circuit breaker electrical endurance and selected accessory/functional component temperature rise.
7.2.6.1 Testing requirements and pass/fail criteria shall be as follows:
a) Circuit breakers shall be cycled for 2,000 electrical close-open cycles operations at
maximum continuous current rating and rated maximum voltage with a power factor less than or equal to 80 percent lagging.
b) Rate of operations shall be no less than one close-open operation every 2 minutes.
c) Charging motors shall be used to charge the circuit breaker for all operations. The shunt trip device shall be used to open the circuit breaker for all operations. An “a” auxiliary contact shall be used as the shunt trip cut-off switch.