Hubbell Industrial Controls, Inc.
A subsidiary of Hubbell Inc.
4301 Cheyenne Dr., Archdale, NC 27263
Telephone (336) 434-2800 • FAX (336) 434-2803
http://www.hubbell-icd.com
ER-384-2M
STATIONARY CONTACTS
If stationary contacts are to be changed, remove them
before attempting to change the moving contacts.
When replacing do so after moving contact assembly
has been replaced. This observance will make the
change of moving contacts easier but is not mandatory.
MOVING CONTACTS
1. Raise operating lever to mid-trip position and place
block under lever to support in this position against
hook weight.
2. Remove moving contact spring pressure by lifting
lock lever. This frees moving contact assembly for
easy removal.
3. Disconnect shunt lead from stationary terminal.
4. Remove two slotted head screws from finger holder
– figure (2). Force contacts apart and at the same
time lift up – figure (3). Remove assembly – figure
(4).
5. Change contacts making sure all contact surfaces
are thoroughly clean and connections are tightened
securely.
6. Replace assembly including contact holder and
spring, making sure shunt leads are properly
positioned to prevent chafing on adjacent parts.
LUBRICATION
1.
Shaft bearings
are of the permanently lubricated,
sealed type and should not require attention.
2.
Torsion operation spring
– Occasional
application of a Molybdenum-Disulfide grease
should suffice to minimize wear and friction
between turns.
LOCK LEVERS
These parts must work freely and should be tested
occasionally by lifting with finger. A non-gumming type
oil only should be applied to the pivot bearing once
every few months – The Nylatron roller bearing needs
no oil. A whip of lubriplate occasionally on the polished
end of the lever will reduce friction and give better
action.
FRAME AND COVER
Ample electrical clearance has been provided for
possible conductive dirt build-up in bottom of frame.
This should be cleaned out on an annual basis or
oftener if conditions warrant. Always replace cover
after inspection to minimize entrance of dirt and foreign
objects.