Instruction Leaflet 30-470 (E)
Page 5
Automated Control Component Identification
1.NE — ON Delay Relay — Assuring emergency source will remain
2.ES — OFF Delay Relay — Overriding momentary dips or outages
3.EC — ON Delay Relay — Running standby unloaded to cool
4.EN — ON Delay Relay — Assuring normal source will remain
5.CR — Control relay — Voltage and frequency sensitive
6.VS — Voltage sensing relays — Sensing normal source
7.Terminal block connection
Type LRO Robonic Automatic Transfer Switch
Rated 30 amperes through 100 amperes at 600 volts Ac maximum 50 or 60 Hertz.
The mechanism is a lever operated device controlled by a 120 volt unidirectional motor.
The transfer motor drives a nylon cam which in turn operates a steel lever by sliding a pin along a slot in the back of the lever. The lever, in turn, operates the two breaker handles. The distance travelled is determined by two projections on the cam. These projections operate two micro switches (NLS, ELS) which in turn disconnect the power to the transfer motor causing a brake to operate.
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| Slide |
Emergency | Normal | Pin |
|
The type LRO has three operating positions. They are the normal breaker closed and the emergency breaker open, the emergency breaker closed and the normal breaker open or both the normal and emergency breakers open but never both normal and emergency breakers closed.
The type LRO can also be easily manually operated. Open the lever cover, remove the slide pin and place it in the hole supplied in the lever cover and close the cover. Then the lever can be manually operated for what ever position desired without interference by the automatic control. For automatic control again, simply align the lever slot with the hole in the operating cam and replace the slide pin.
The various automatic control components are described under the section titled “Automatic Control”.
Pivot Post
Operating Arm
Cam
Projection To
Operate Limit
Switches
