Lead training
•
Cantilever Strength of Assembly: Sufficient to support
one 500 MCM or 240 mm
2
Cu lead per contact.
•
Switch contacts are pre-gauged at factory and will have
some rotation in same plane as switch blade. Leads
attached to switch contacts must not restrict this
rotation. The nuts holding the contacts should not be
tightened. Leads can be bolted to rear of contact and
care should be taken to minimize mechanical stress on
the contacts. Standard dielectric dimensions for lead
separation should be followed. Tight lead training may
cause excess cantilever force and difficulty in switch
operation.
Figure 6. Arc clearance zone.
Figure 7. View of tank front with optional limit plate
positioned over pin.
Note:
With limit plate positioned securely as shown, switch can be operated only
counterclockwise to “line A only” position and no further.
OPEN
LINE A
ONLY
LINES
A & B
LINE B
ONLY
WELD PINS (4)
(FOR
POSITIONING
LIMIT PLATE)
CAUTION
This illustrated decal in Figure 7 is typical of some
V-blade switches only. See Table 6 for other switch
layouts and schematics.
ARC CLEARANCE ZONE
ARC CLEARANCE ZONE
3.50" (89 mm)
MINIMUM
1.75" (45 mm)
MINIMUM
7.0" (178 mm) RADIUS
ALL AROUND
(FRONT VIEW)
7
SECTIONALIZING SWITCH INSTALLATION INSTRUCTIONS
MN800002EN March 2016
