Supply Disconnecting Device; Europe; Other Regions; Thermal Overload And Short Circuit Protection - ABB ACSM1 Hardware Manual

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Supply disconnecting device

Install a hand-operated input disconnecting device (disconnecting means) between
the AC power source and the regen supply module. The disconnecting device must
be of a type that can be locked to the open position for installation and maintenance
work.

Europe

If the regen supply module is used in an application which must meet the European
Union Machinery Directive according to standard EN 60204-1 Safety of Machinery,
the disconnecting device must be one of the following types:
• a switch-disconnector of utilization category AC-23B (EN 60947-3)
• a disconnector that has an auxiliary contact that in all cases causes switching
devices to break the load circuit before the opening of the main contacts of the
disconnector (EN 60947-3)
• a circuit breaker suitable for isolation in accordance with EN 60947-2.

Other regions

The disconnecting means must conform to the applicable safety regulations.

Thermal overload and short circuit protection

Thermal overload protection

The regen supply module protects itself and the input and supply cables against
thermal overload when the cables are dimensioned according to the nominal current
of the regen supply module. No additional thermal protection devices are needed.
Note: The regen supply module cannot protect itself against excessive current
drawn by the motor drives connected to the DC bus. Take this into account when
dimensioning the maximum motor load planned to be supplied by the supply
module.

Protection against short-circuit in the supply cable or the regen supply module

Protect the supply cable with fuses or circuit breakers. Fuse recommendations are
given in the chapter
IEC gG fuses or UL type T fuses will protect the input cable in short-circuit situations,
restrict regen supply module damage and prevent damage to adjoining equipment in
case of a short circuit inside the regen supply module.

Operating time of the fuses and circuit breakers

Check that the operating time of the fuse is below 0.5 seconds. The operating
time depends on the type, the supply network impedance, and the cross-sectional
area, material and length of the supply cable. US fuses must be of the "non-time
delay" type.
Planning the electrical installation
Technical data. When placed at the distribution board, standard