Siemens I-T-E Sensitrip MD Series Information And Instruction Manual page 34

I-T-E Mechanical Interlock (M15404)
D. Using tie bar wrench carefully positioned over tie bar
connector, (so as not to damage support tie bar assem-
bly), pull tie bar back in direction of arrow and remove
wood block. With care remove tie bar wrench.
E. Replace handle if removed.
NOTE: Tab on front of handle must be aligned toward line end.
F Replace load cover The six #10-32 x 3/4 in. screws must
be installed toward the line side of the circuit breaker. The
two 10-32 x 13/8 in. screws are installed on the load end.
Tighten all load cover screws to 25 in.-lb.
Rocker Arm Mounting
A. Drill panel as shown for panel mounting (circuit breakers
on 9 or 12 in. centers), (Figure 5). For plug in mounting,
see Figure 6.
B. Assemble bracket (15) to rear of 10 gage customer panel
using two flat head screws (16), lockwashers (17) and
nuts (18) supplied as shown in Figure 7.
C. Assemble rocker arm (19) to bracket with rocker arm pin
(20).
NOTE: Heads of rocker arm pin must be on upper side of
assembly and cotter pin (21) on lower side. Insert cotter
pin into hole in rocker arm pin and secure by spreading
ends (Figure 7).
D. Add circuit breakers (specially prepared) to customer's
panel for panel mounted or plug-in adapters and circuit
breakers for plug in applications. Refer to installation
instruction supplied with plug-in adapters Catalog PC5662
or PC5663. Carefully position circuit breaker over 1.00 in.
diameter hole in panel so as not to damage protruding
plunger For panel mounted applications use Catalog
MSMN mounting screw kit (part of mechanical interlock
Catalog Ml5404) to fasten circuit breaker to customer's
panel. Replace terminal shields. Tighten two #8-32 screws
each to 12 in.-lb.
E. Assemble rocker arm pins through rocker arm and slot in
plunger and insert cotter pin into hole in pin and spread
. ends (Figure 7).
NOTE: Heads of rocker arm pins must be on upper side of
assembly and cotter pins on lower side.
F With both circuit breakers in OFF position, interlock must
move freely.
G. With one circuit breaker ON the other circuit breaker
must not close.
H. Affix labels (22) to front of both circuit breakers as shown
in Figure 1.
NOTE: Installation of a Mechanical Interlock system prevents
use of internal accessories in the left pole of the circuit
breakers.
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Figure 6