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Home›Repair guides›Service procedure for ATC-300 Breaker rev2010 IB01602008E Wall Mount.PDF

Transfer Switches - Eaton Cutler Hammer — Service procedure for ATC-300 Breaker rev2010 IB01602008E Wall Mount.PDF

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Procedure

  1. Step 9: Position the power panel in the enclosure such that the two upper elongated holes, one on either side of the power panel, fit over the two positioning bolts located in the rear of the enclosure. This will line up the four correct mounting holes in the power panel with the pre-tapped inserts in the rear of the enclosure. Step 10: With the power panel held securely against the back of the enclosure, replace and tighten the four mounting bolts removed previously in Step 3. Step 11: If applicable, attach the neutral strap, removed in Step 2, to the back of the enclosure through the upper bonding hole. Step 12: Reconnect the P1, P2, and P3 connector plugs that were disconnected in Step 1. 4.5 Power Cable Connections POWER CONDUCTORS MAY HAVE VOLTAGE PRESENT THAT CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. DE-ENERGIZE ALL POWER OR CONTROL CIRCUIT CONDUCTORS TO BE CONNECTED TO THE ATS EQUIPMENT BEFORE BEGINNING TO WORK WITH THE CON- DUCTORS AND/OR TERMINATING THEM TO THE EQUIPMENT. USE OF CABLE LUGS NOT DESIGNED FOR THE ATS MAY CAUSE HEATING PROBLEMS. BREAKER LUGS ONLY MOUNT TO THE BREAKER, WHILE TRANSFER SWITCH LUGS MOUNT TO BOTH THE BREAKER AND THE BUS BAR BEHIND THE BREAKER. FOR INSTALLA- TION INSTRUCTIONS, REFER TO THE INSTRUCTION LEAFLET SUP- PLIED FOR THE SPECIFIC LUGS. NOTICE POWER PANEL SWITCHING DEVICE TORQUE FT-LB (NM) Type FD 10 (14) Type KD 20 (27) Type LD 25 (34) Type MD 25 (34) Type ND 25 (34) Type NB 25 (34) WARNING CAUTION
  2. Failure of Source 1 is detected by the controller intelligence.
  3. When the controller detects a failure, the engine contacts close (after delay if programmed) and start the engine-driven generator.
  4. When the Source 2 voltage reaches its operation rating, the K2 relay closes, starting the transfer operation. This operat- ing sequence opens the Source 1 switch and closes the Source 2 switch.
  5. The load is now transferred to the Source 2 power source. 5.4.2 Source 1 Power Source Restoration
  6. A return to the Source 1 power source begins when the volt- age in all phases of a three-phase sensing unit, or phase-to- phase in a single sensing unit, is restored to a preset value.
  7. At the present voltage, the controller will cause the K1 relay to change state. This starts the return to the Source 1 power source and Source 1 transfer switch operation.
  8. During this sequence, the Source 2 power source switch is opened and the Source 1 power source switch is closed.
  9. Simultaneously, the engine cool-down timer initiates the shut down of the engine driven generator.
  10. Transfer of the load back to the Source 1 power source is now complete. Section 6: Testing and Problem Solving 6.1 Testing After the ATS equipment is initially installed or during planned out- ages, the installation should be tested to ensure that all equipment operates properly. This attention to detail will help avoid unex- pected malfunctions. Mechanical and/or electrical tests should be performed as described in this section. The frequency of subsequent te
  11. No Load Engine Test;
  12. Load Engine Test; or
  13. Disabled. The factory default is set to:
  14. Load Engine Test a. After the Time Delay Engine Starting (TDES) has timed out, the engine should start, run, and build up to normal voltage and frequency. b. The transfer switch will transfer to the Source 2 power source (the Source 1 switching device opens and Source 2 switching device closes) after the Time Delay Normal to Emergency (TDNE) times out. Step 3: Initiate an automatic transfer operation back to the Source 1 power source by pressing the <Engine Test> pushbut- ton one time.
  15. After the Time Delay Emergency to Normal timer (TDEN) has timed out, the transfer switch will transfer back to the Source 1 power source (the Source 2 switching device opens and the Source 1 switching device closes).
  16. The Time Delay for Engine Cool-Off (TDEC - Feature 4) will allow the engine to run unloaded for a preset time after transfer to the Source 1 power source is com- pleted. 6.1.5 Alternate Tests
  17. Alternate operational tests may be possible depending upon the options provided with any given ATS. Refer to the sche- matic diagram provided with the ATS equipment, along with the specification nameplate, to determine the exact options provided.
  18. If you attempt to manually operate the ATS with the Source 1 power source connected and available, the ATC-300 logic will cycle the ATS back to the Source 1 power source since it is the preferred source. The ATS was designed with this safety feature in case a manual transfer is attempted while the switch is in automatic mode and under load. 6.2 Problem Solving HAZARDOUS VOLTAGES IN AND AROUND ATS EQUIPMENT DURING THE PROBLEM SOLVING PROCESS CAN CAUSE SEVERE PERSONAL INJURY AND/OR DEATH. AVOID CONTACT WITH ANY VOLTAGE SOURCE WHILE PROBLEM SOLVING. ONLY PROPERLY TRAINED PERSONNEL, FAMILIAR WITH THE ATS EQUIPMENT AND ITS ASSOCIATED EQUIPMENT, SHOULD BE PERMIT- TED TO PERFORM THE PROBLEM SOLVING FUNCTION. IF AN INDI- VIDUAL IS NOT QUALIFIED TO PERFORM THE PROBLEM SOLVING FUNCTION, THE INDIVIDUAL SHOULD NOT ATTEMPT ANY OF THESE PROCEDURES. A basic problem-solving effort is the first step to take prior to call- ing for assistance. Frequently, the effort will successfully address most problems encountered. The problem solving procedure is presented in the Troubleshooting Guide (Table 3, Section 7 of ATC-300 Controller Instruction Booklet IB01602009E). Remem- ber, only qualified individuals familiar with the ATS equipment and the system in which it is applied should attempt these problem solving procedures. If a problem persists after having completed the problem solving procedure, contact a Eaton representative for further assistance. When calling for assistance, the following is the minimum informa- tion required to properly address the need:
  19. Style number of ATS, if applicable;
  20. Catalog number of ATS;
  21. Actual location of the ATS (type of facility, address, etc.);
  22. Company name and name and position of individual represent- ing company;
  23. Basic description of the situation as it exists; and
  24. Any results of the problem solving steps taken and/or read- ings taken. NOTICE AT THIS POINT, AND PRIOR TO MAKING ANY ATTEMPT TO ENER- GIZE THE ATS EQUIPMENT, THE ENGINE-DRIVEN GENERATOR SHOULD BE OPERATED. IF NECESSARY, THE VOLTAGE REGULA- TOR ON THE GENERATOR SHOULD BE ADJUSTED ACCORDING TO THE MANUFACTURER’S RECOMMENDATIONS. THE ATS EQUIP- MENT WILL RESPOND ONLY TO THE RATED VOLTAGE AND FRE- QUENCY PROGRAMMED INTO THE CONTROLLER. WARNING WARNING

Source: manual:ATC-300 Breaker rev2010 IB01602008E Wall Mount.PDF. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.