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Instruction Leaflet
30-470 (E)
Page 11
Replacing Parts
The Robonic Automatic Transfer Switch has been designed to have all
components accessible and readily removable from the front of the
panels. The Robonic Transfer Switch is divided into two basic
sections. The upper section consists of the main contacts and
transfer mechanism, the lower section consists of all the automatic
control devices.
Caution
When replacing any parts of the mechanism, control transformers or
breakers, isolate the Robonic Transfer Switch from any possible
source of power.
To remove the transfer mechanism of the LRO transfer switch, first
open the cover and remove the slide pin from the operating cam, then
remove the centre bolt, the mechanism will lift straight off. The
breakers and transfer motor bracket are held by four screws for ease
of removal and replacement. When replacing the mechanism, first set
it on the Robonic with the breaker handles in the holes provided and
then fasten the centre bolt reasonably tight with the mechanism fully
movable with an equivalent swing distance up and down.
To remove the transfer mechanism of the RO transfer switch, remove
the four bolts holding it, taking note of which holes the bolts were in,
then lift the mechanism straight off. The breakers are held by two
bolts at one end and the bus connectors on the other end. The
transfer motor is mounted to the transfer mechanism cover and centre
drive gear. When replacing any part of the transfer mechanism, be
sure that the scribe lines of the gears are in a straight row (example
shown below).
When replacing the mechanism move it about until the breaker toggles
fit between the mechanism fingers and then fasten the bolts tightly. To
test for proper operation first operate manually and then connect 120
volt, 60 hertz supply to motor leads and observe operation for free
movement and proper breaker operation.
The PRO transfer switch mechanism is similar to the RO with the
exception that the PRO mechanism has five gears and is mounted
horizontally. The breakers are fastened to the panel by six bolts.
All Robonic transfer switch breakers and mechanisms have allowed
some adjustments for mounting to assure proper operation without
slipping or binding. Be sure all hardware is tightened sufficiently
before reenergizing any transfer switch.
To replace any of the octal plug-in relays, pull old units straight out and
insert the replacement unit. Some of the timing relays have white clips
on the top and bottom to be released first. Due to the tight fit of the
receptacle and pins, you may have to move the relay about a little to
pull it out. DO NOT INTERCHANGE ANY RELAY WITH ANY OTHERS.
To prevent operation of the transfer switch while replacing mechanism
or components, disconnect all source of power.
SCRIBE LINE
Parts List
Part Name Style No.
Parts Common to all Robonics
Control Relay 3155A21H01
Voltage Sensor Fixed 3152A50H01
Voltage Sensor Adjustable 3152A50H02
Timer On Delay 5180 sec. 688A887H03
Timer On Delay 20 s10 m 688A887H04
Timer On Delay 130 m 688A887H05
Timer Off Delay 1300 sec. 688A886H11
Timer Off Delay 2.5 s fixed 3152A51H01
Instantaneous Relay 3152A52H01
Socket Potter & Brumfield 3152A52H02
Socket Omron 688A887H01
Plant Exerciser 688A888H01
Battery Charger 12V 1259C26G01
Battery Charger 24V 1259C26G03
4 Position s/s fixed 3151A90H01
4 Position s/s keyed 3151A90H02
Terminal Block 300V 688A133H01
125V Control Transformer 600V 573B414H01
125VA Control Transformer 480/416V 573B414H02
125VA Control Transformer 240/208V 573B414H03
Sensing Transformer 600V 573G414H04
Sensing Transformer 480V 573B414H05
Sensing Transformer 416V 573B414H06
Sensing Transformer 208V 573B414H07
For Type LRO Robonics
Mechanism 833C222G02
Motor Assembly 833C223G01
Motor 688A732H02
Operating Cam 688A548G01
Slide Pin 688A731H01
Limit Switches 688A747H01
For Type RO Robonics
Mechanism 150 to 400A 833C226G01
Mechanism 600 to 1000A 833C226G01
Motor 688A749H01
Solenoid 688A740H01
Brake Shoe Assembly 688A738G01
Operating Cam 572B774H01
Auxiliary & Limit Switch 688A747H01
For Type PRO Robonic
Mechanism 688A109G01
Motor 688A749H02
Solenoid 688A740H01
Auxiliary & Limit Switch 688A747H01
300VA Control Transformer 600V/480V 554B408H04