Type MSO
Motorized Switch Operators
FEATURES
- Rigid construction fabricated
aluminum housing
- High torque 1/2 horse power
motor
- Fast acting disc brake
- Gear train, with high carbon
steel gears
- Anti condensation heater with
thermostat
- Mechanically interlocked,
solenoid operated
- "Open" and "Close" reversing
contactors
- Knife switches with fuse
protection, for motor and heat isolation
- Internally mounted terminal
strip
- 8 stage auxiliary switch tower
- Extenally mounted mode
selector handle
- Manual operation Provision by
either a handwheel or a removeable hand crank
 APPLICATION
The GS T&D Products MSO motor operators are designed for reliable remote
operation of any disconnecting, security grounding, load-break or high speed
fault switch, 15kV to 765kV.
ELECTRICAL CONTROLS
All electrical controls are conveniently located and are readily accessible
for either side of the housing, this permitting easy and rapid access to all
connections.
Mounted in the control panel are three knife switches,
two reversing contactors and protection fuses. Two of the knife switches
control main current to the motor. The third is connected to the heater.
Fuses are of the slow blow type. The motor reversing contactors are solenoid
operated with their armatures mechanically interlocked to prevent
generation of simultaneous open and close commands. They
are electrically connected for seal-in operation i.e. in such a manner that,
once an operation cycle is initiated, the motor will continue to run until
that cycle is completed. All wiring is stranded type complete with marking
tabs on terminal points and wire ends to facilitate tracing. All necessary
external connections are made at a strip type terminal block mounted
adjacent to the conduit opening. The terminals are of the clamp type
eliminating the need for connectors.
 LIMIT
CONTROL
A quantity of up to eight cam actuated limit switches are used to
electrically control the limits of travel required as well as to serve as
initiators for signalling devices. The limit switches are readily accessible
for initial setting as well as for adjustment at any time after
installation.
MOTOR
A full range of high starting torque motors are available for use with this
mechanism. All are of the totally enclosed type utilizing moisture resistant
windings and permanently lubricated ball bearings. Motors are available in
48, 125, or 250 volt D.C. and 115 or 230 volts 60 Hertz A.C.
BRAKE
A fast acting disc brake beneath the motor prevents overtravel of the switch
operating mechanism. The brake is spring set and solenoid released so that
operation is automatic in the event of power failure. Should the solenoid
fail to retract, the motor possesses sufficient torque to overpower the
brake.
GEAR
TRAIN
Cadmium plated, high carbon steel gears keyed to high strength steel shafts
comprise the gear train. Oil impregnated bronze bushings are used throughout
eliminating any requirement for routine bearing lubrication. The entire
assembly is easily accessible for inspection purposes.
HOUSING
The housing is rigidly constructed of welded aluminum plate. Easy access is
provided to all components via two large aluminum covers rendered
weather-tight by closed cell sponge neoprene gaskets. Padlock lugs are
provided for each cover. A large removable conduit plate in the housing
floor may be drilled to accept all conduits. The housing is ventilated by a
screened weather-proof breather also located in its floor.
MANUAL
OPERATION AND MODE SELECTOR HANDLE
Two types of manual operation are available; (a) 24" (610mm) diameter
handwheel used in conjunction with an outboard gear reducer; (b) removable
hand crank used in conjunction with an outboard bearing.
(a) Handwheel
A standard 24"or 610mm diameter handwheel is
mounted above the mechanism housing for manual mode operation. The wheel is
coupled to the output shaft by means of a heavy cast lug on one of its
spokes which slips over a stud projecting from the shaft.
The external mode selector handle,
marked "Motor Manual", when moved to the "Manual" position, decouples the
motor from its gear train by disengaging an intermediate spur gear. A
cut-out switch activated by this handle prevents electrical operation in the
"Manual" mode by interrupter the main circuit. The selector handle is held
in either of its two positions by a spring-loaded detent bolt which must be
withdrawn before the handle can be moved. The handle may also be padlocked
in either position.
(b) Removable Hand
Crank
The detachable hand crank is stowed inside the
mechanism housing. Prior to cranking, the external mode selector handle is
moved to the "local manual" position to expose the hand crank receptacle.
The hand crank inserted and turned for manual operation.
The external Mode Selector Handle is
spring retracted into recessed detents which hold it in whichever of its
three positions has been selected. It will normally be left in the "remote
electrical" position which permits motorized operation only. Selecting "off"
precludes both motor and manual operation. Turning the handle to "local
manual" exposes the hand crank receptacle and disengages the motor disc
brake.
Model
Details
|
Type |
MSO 1/2 |
MSO5 |
MSO10 |
MSO10LS |
| Outboard Gear
Reducer Utilized |
None |
Type G9P |
Type G18P |
Type G18P |
| Outboard Gear
Reduction ratio |
1:1 |
1:9 |
1:18 |
1:18 |
| Number of turns
for Complete Operation |
1/2 |
4.75 |
9.5 |
9.5 |
| Operating time
in seconds |
5 to 7 |
5 to 7 |
11 to 13 |
25 to 35 |
| Available
Voltages |
24vdc, 48vdc, 125vdc, 250vdc, 110vac, 220vac |
| Motor
Horsepower |
1/2 |
| Motor RPM |
1750 rpm (dc volts) or 1700 rpm (ac volts) |
|
Anti-condensation heater |
125
watts @ 110vac |
| Internal gear
train ratio |
360:1 |
80:1 |
80:1 |
200:1 |
Download the Catalog ! The
catalog for the MSO is available for downloading (as well as for all Power
Apparatus products). They are in Adobe Acrobat format so you will need a
copy of Adobe Acrobat to read these, If you don't have a copy you can
download it for free at Abobe's web site, just click on the button! |
