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LINES GP-FRONT 2277966 - Caterpillar



2277966 LINES GP-FRONT Caterpillar parts LINES
Rating:
26
Alternative (cross code) number:
CA2277966
227-7966
2277966
Caterpillar 2277966 LINES GP-FRONT

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1. Turn OFF both the NORMAL and STANDBY power supplies to the transfer switch.2. Note the position of the transfer mechanism main contacts by observing the display in Windows "A" and "B", as follows:* Window "A" indicates "ON" - Load terminals (T1, T2, T3) are connected to the normal terminals (N1, N2, N3)* Window "B" indicates "ON" - Load terminals (T1, T2, T3) are connected to the standby terminals (E1, E2, E3)* Windows "A" and "B" both Indicate "OFF" - This is the tripped or neutral position, with both power sources disconnected from the load terminals.3. If the word "ON" is visible in either window "A" or "B", first trip the switch (set to NEUTRAL) as outlined in Step (4). Always trip the switch (set to NEUTRAL) before closing the switch to either Position "A" or "B". The switch is tripped if the word "OFF" appears in both windows "A" and "B". If the switch is already TRIPPED or at NEUTRAL, go to Step (5). 4. To trip the Switch - This is the NEUTRAL position, with both power sources disconnected from the load. Use the operating pin (shipped with unit) to push in on trip lever in Hole "T" (located on top of the transfer mechanism). The main contacts should trip and the word "OFF" should appear in both windows "A" and "B". 5. To close "A" - Attach the manual handle to square shaft at upper left corner of Transfer Mechanism. Move the handle upward. The word "ON" should appear in window "A" ("OFF" in window "B"). In this position, the load is connected to the normal power source. 6. To close "B" - Attach manual handle to square shaft. Operate manual handle upward while pushing in on lever in Hole "S" (located on top of the transfer mechanism). The main contacts should actuate and the word "ON" should appear in "B" ("OFF" in window "A"). In this position, the load is connected to the standby power source.7. Before proceeding, trip the switch (Step 4) and then close "A" (Step 5). The switch must be at normal position before proceeding (load connected to normal source).Voltage Checks
Before proceeding, check the transfer switch data plate for rated voltage. The data plate voltage must be the same as the normal and standby line voltages.
Personal injury or death could result by touching hot terminals or wires and by not setting maintenance disconnect switch to MANUAL.During the voltage checks, the transfer switch will be electrically energized. PROCEED WITH CARE. DO NOT TOUCH ELECTRICALLY HOT TERMINALS OR WIRES.During the voltage checks, set the MAINTENANCE DISCONNECT SWITCH to its MANUAL position.
Perform voltage checks as follows:1. Inside the transfer switch enclosure, set the Maintenance Disconnect Switch to MANUAL.2. On the switch enclosure door, set the OPERATING MODE SWITCH to AUTOMATIC MODE.3. Check that the switch main contacts are at their normal position, i.e., the word "OFF" appears in Window "B" and the word "ON" in window "A". See "Manual Operation" section of this manual.
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