Effective 2/2/2001
Page 2
I.L. 70C1037H03
NOTE:
The recommendations and information contained
herein are based on experience and judgement, but should
not be considered to be all inclusive or to cover every
application or circumstance which may arise.
If you have any questions or need further information or
instructions, please contact your local representative or
the Customer Support Center at 1-800-356-1243.
1.0 GENERAL DESCRIPTION OF DIGITRIP TRIP UNITS
The Digitrip Trip Units are breaker subsystems that provide
the protective functions of a circuit breaker. The trip units
are in removable housings, installed in the breaker, and
can be replaced or upgraded in the field by the customer.
This instruction book specifically covers the application of
Digitrip Trip Units
(see Figure 1.1)
installed in Magnum and
Magnum DS Breakers. Throughout this Instructional
Leaflet, the use of the term “Magnum Breakers” refers to
both the Magnum and Magnum DS low-voltage, AC power
circuit breakers.
The Magnum Digitrip line of trip units consists of the 220,
520, 520M and 520MC for UL standards and models 220,
520
i,
520M
i
and 520MC
i
for IEC standards. Only models
520MC and 520MC
i
provide communications.
(See Table
1.1 for available protection types.)
The Digitrip 220, 520, 520M and 520MC trip units may be
applied on both 50 and 60 Hertz systems.
Figure 1.1 Digitrip 520MC Trip Unit with Rating Plug
