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
• New circuit-breaking technology ISTAC for a higher
current-limiting performance, upgrading the circuitbreaking
• Electronic circuit breakers with the Digital ETR protecting
the circuit accurately.
• One-frame, one-size design allowing efficient panel
• 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.