EPP-R4072 datasheet(50/75 Pages) ABB

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shortcircuit breaking capacity and rounded up to

the nearest whole number. It may be expressed as

a percentage of Icu (for example Ics = 25% Icu).

The sequence of operations shall be:

O – t – CO – t – CO

The following symbols are used for defining the

sequence of operatons:

represents an opening operation.

represents a closing operation followed

by an automatic opening.

represents the time interval between

two short-circuit operations.

—

01 The rated insulation

voltage is not

necessarily equal to

the rated voltage of

the equipment which

is primarily related to

functional performance

Rated operational voltage (U

The rated operational voltage of an equipment is

a value of voltage which, combined with a rated

operational current, determines the application

of the equipment and to which the relevant tests

and the utilization categories are referred.

For single-pole equipment it is generally stated

as the voltage across the pole. For multi pole

equipment it is generally stated as the voltage

between phases.

Equipment may be assigned a number of

combinations of rated operational voltage and

associated making and breaking capacities for

different duties and utilization categories.

EPP-R4072 数据表(PDF) 50 Page - ABB

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