PB断电器,PB继电器,PB时间计Potter&BrumfieldElectromechanicalComponentsCircuitBreakersTimersM6/W6SeriesCompactSizeMagneticCircuitBreakers***/W9SeriesStandardSizeMagneticCircuitBreakersThermalCircuitBreakersTimersOverviewOverviewRelaysContactorsLatching,Impulse,RotaryandSpecialApplicationRelaysMid-RangePCBoardRelaysMid-RangePlug-in/PanelMountGeneralPurposeRelaysMore...Overview)