Low-voltage electrical switching apparatus for controlling several energy sources in commercial and industrial buildings, in particular emergency transfer switches, branch disconnecting switches, branch circuit breakers, parallel electrical distribution boards, contactors and controls thereof.

'apparatus':6 'board':31 'branch':22,25 'breaker':27 'build':16 'circuit':26 'commerci':13 'contactor':32 'control':8,34 'disconnect':23 'distribut':30 'electr':4,29 'emerg':19 'energi':10 'industri':15 'low':2 'low-voltag':1 'parallel':28 'particular':18 'sever':9 'sourc':11 'switch':5,21,24 'thereof':35 'transfer':20 'voltag':3

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