S210-12-1 Three-Phase Pad-Mounted …

1 Effective August 2013. Distribution Transformers Supersedes February 2013 S210-12-1 . Three-Phase Pad-Mounted compartmental type installation and maintenance instructions DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY. The information, recommendations, descriptions and safety notations in this document are based on Eaton Corporation's ( Eaton ) experience and judgment and may not cover all contingencies. If further information is required, an Eaton sales office should be consulted. Sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser. THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES. OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY.

2 EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF EATON. THE. CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES. In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or other- wise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recom- mendations and descriptions contained herein. The information contained in this manual is subject to change without notice. ii Three-Phase Pad-Mounted compartmental type installation and maintenance instructions S210-12-1 August 2013 Contents safety information Safety Information.

3 IV. product information Introduction .. 1. Acceptance and Initial Inspection .. 1. Handling .. 1. Storage .. 2. installation instructions installation Location .. 2. Mounting the Transformer .. 2. Pre-Service Inspection (Exterior) .. 2. Pre-Service Inspection (Interior) .. 3. External Connections .. 4. Accessories Liquid Level Gauge ..5. Liquid Temperature Gauge ..5. Pressure-Vacuum Gauge ..6. Pressure Relief Device .. 6. Switches and Protective Devices Bay-O-Net Fuse.. 7. Internal Cartridge Fuse .. 10. Internal Loadbreak Switches .. 11. Tap-Changer .. 12. Dual-Voltage and Delta-Wye Switch .. 14. Vacuum Fault Interrupter (VFI) .. 15. Air Switches (Arc Strangler ) .. 16. Surge Arresters ..17. maintenance Exterior maintenance .. 19. Cabinet Interior maintenance .. 19. Tank Internal maintenance .. 19. Tank Cover Removal and installation .

4 19. Bushing Removal and Replacement .. 22. Cabinet Removal and installation .. 22. Insulating Liquid maintenance .. 22. Operation Operation .. 24. Applicable Standards Applicable Standards .. 25. Spare Parts and Service Spare Parts and Service .. 25. Three-Phase Pad-Mounted compartmental type installation and maintenance instructions S210-12-1 August 2013 iii ! ! SAFETY. FOR LIFE Safety for life SAFETY. FOR LIFE. Eaton's Cooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We actively promote safe practices in the use and maintenance of our products through our service literature, instructional training programs, and the continuous efforts of all Eaton's Cooper Power Systems employees involved in product design, manufacture, marketing, and service. We strongly urge that you always follow all locally approved safety procedures and safety instructions when working around high voltage lines and equipment, and support our Safety For Life mission.

5 Safety information The instructions in this manual are not intended as a Safety instructions substitute for proper training or adequate experience Following are general caution and warning statements that in the safe operation of the equipment described. apply to this equipment. Additional statements, related to Only competent technicians who are familiar with this specific tasks and procedures, are located throughout the equipment should install, operate, and service it. manual. A competent technician has these qualifications: Is thoroughly familiar with these instructions . DANGER. I s trained in industry-accepted high and low-voltage safe Hazardous voltage. Contact with hazardous voltage operating practices and procedures. will cause death or severe personal injury. Follow all locally approved safety procedures when working I s trained and authorized to energize, de-energize, clear, around high- and low-voltage lines and equipment.

6 And ground power distribution equipment. I s trained in the care and use of protective equipment such as flash clothing, safety glasses, face shield, hard hat, rubber gloves, clampstick, hotstick, etc. WARNING. Following is important safety information. For safe Before installing, operating, maintaining, or testing installation and operation of this equipment, be sure to this equipment, carefully read and understand read and understand all cautions and warnings. the contents of this manual. Improper operation, handling or maintenance can result in death, severe personal injury, and equipment damage. Hazard Statement Definitions This manual may contain four types of hazard WARNING. statements: This equipment is not intended to protect human DANGER life. Follow all locally approved procedures and safety practices when installing or operating this Indicates a hazardous situation which, if not avoided, equipment.

7 Failure to comply can result in death, will result in death or serious injury. severe personal injury and equipment damage. WARNING WARNING. Indicates a hazardous situation which, if not avoided, Power distribution and transmission equipment must could result In death or serious injury. be properly selected for the intended application. It must be installed and serviced by competent CAUTION personnel who have been trained and understand proper safety procedures. These instructions are Indicates a hazardous situation which, if not avoided, written for such personnel and are not a substitute could result in minor or moderate injury. for adequate training and experience in safety Caution: Indicates a hazardous situation which, if procedures. Failure to properly select, install or not avoided, could result in equipment damage only. maintain power distribution and transmission equipment can result in death, severe personal injury, and equipment damage.

8 Iv Three-Phase Pad-Mounted compartmental Type installation and maintenance instructions S210-12-1 August 2013 IMPORTANT Handling Special procedures must be followed when handling Do not Exceed Transformer Ratings. Transformers transformer in ambient temperatures below -20 C. Contact should be operated only at the ratings specified your Eaton's Cooper Power Systems representative for on the transformer nameplate. Prolonged overload further instructions . Failure to follow special handling operation will measurably shorten the projected procedures may cause premature failure of transformer and service life of a mineral oil-filled transformer. PEAK its components. transformers have extended life and can be operated at overload conditions while still exceeding ANSI. standard insulation life. Transformer weight The transformer weight is shown on the transformer Introduction nameplate.

9 Most of the weight in a Pad-Mounted transformer assembly is in the main tank that holds the core These transformers are designed for installation on three- and coil assembly and the insulating liquid. phase underground systems. All units are constructed for weather-exposed mounting on a concrete pad with high- Moving transformers shipped on pallets and low-voltage cable entering the operating compartments through an opening in the pad. Transformers shipped on pallets may be lifted or moved by forklift trucks of proper capacity. When using a forklift, lift with the transformer tank closest to the mast of the forklift Read this manual first since most of the transformer weight is in the tank. Pallet- Read and understand the contents of this manual and follow mounted equipment may also be moved by crane or hoist. all locally approved procedures and safety practices before installing or operating this equipment.

10 Lifting transformers by crane or hoist Check the weight of the transformer and the capacity and Additional information condition of all hoisting or lifting equipment. Do not use These instructions cannot cover all details or variations in worn, frayed or damaged cables or slings. Do not use the equipment, procedures, or process described, nor to hoisting machinery with load capacity less than the weight provide directions for meeting every possible contingency of the transformer. Improper use of hoist or jack could during installation , operation, or maintenance . For additional seriously damage the transformer or its attachments or information, contact your Eaton's Cooper Power Systems cause serious personal injury. representative. For unloading, lifting lugs are provided near the top of the transformer tank. Lifting chain or cable angles should not be over 30 from vertical.