Measuring shunts B2...B6 type are destined to extend measuring ranges of d.c. ammeters, wattmeters and electrodynamic or ferrodynamic counters which accuracy classes are: 1, 1.5, or 2.5. - nominal current: 1A...15kA - voltage drops: 50, 60, 75, 150, 100mV, - accuracy class: 0,5, - catch clamping on a rail or to the base. Measuring shunts B7 type are destined to extend measuring ranges of d.c. ammeters, wattmeters and electrodynamic or ferrodynamic counters which accuracy classes are: 1, 1.5, or 2.5. - nominal current: 40A...4kA - voltage drops: 300mV, - accuracy class: 0,5, - fixing to the base.