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Mitsubishi Advancing Technology

Mitsubishi, the leading manufacturer of circuit breakers,

has been providing customers with a wide range

of highly reliable and safe moulded case circuit breakers

(MCCB) and earth-leakage circuit breakers

(ELCB), corresponding to the needs of the age.

Since production began in 1933 many millions of

Mitsubishi ACBs, MCCBs and MCBs have been sold

throughout many countries.

In 1985 a new design concept for controlling arc energies

within MCCBs – vapour jet control (VJC) – was

introduced and significantly improved performance. It

is provided the technological advance for a new ‘super

series’ range of MCCBs and is used in all present

ratings from 3 to 1600 amps.

In 1995 Mitsubishi offers the new PSS (Progressive

Super Series) breakers having ratings from 3 to 250

amps that concentrate the most advanced technologies

into a compact body. Their four major features

are:

• New circuit-breaking technology ISTAC for a higher

current-limiting performance, upgrading the circuitbreaking

capability.

• Electronic circuit breakers with the Digital ETR protecting

the circuit accurately.

• One-frame, one-size design allowing efficient panel

design.

• Cassette-type internal accessories that allow installation

by the user.

Progressive Super Series, an integration of technology

and know-how from this comprehensive electronic

product manufacturer, will create its own fields of application

with its excellent performance.