Wye/Delta 120/240 4 wire Transformer Bank

OSHA Required Tailgate Discussion Topics Hazards Associate with the job Work Procedures Involved Special Precautions Energy Source Controls PPE Required The five topics required by OSHA to discuss in the tailgate. First letter from each topic = How Well Should Everyone Plan

Work Procedures Involved Hazards associated with the job Special Precautions Energy Source Controls Personal Protective Equipment Be sure to record your emergency location and post in a location everyone on the crew knows. Have your PPE and First Aid kit available Be sure your AED is accessible. A safe job begins with a thorough inspection of… Tools Be certain all of your tools are in good shape. Equipment Make sure your trucks are all in working order take time to preflight your equipment and insure there are no surprise. Line/Structure Look over the line and structure. Are there any potential hazards? (Broken insulators, damaged wire, clearances over roads or from trees?) Be aware of your work area, be sure to cover anything you can reach touch or fall into. And anything that can reach touch or fall into you! Discuss all PPE needed for the job and wear your PPE. Be sure to inspect your equipment prior to use. Identify all voltages you are exposed to. Be sure to have all of your Arc-Flash protective gear on. Identify a dedicated observer Working in traffic exposes you to hazards that are difficult to control. Give the vehicles plenty of time to see and avoid you! Follow the manual of traffic control for your area. Slips trips and falls are some of the most common injuries, look for hazards that could cause this. Be sure to inspect and wear your fall arrest harness. Here are the five topics again with signs and bubbles to jump start tailgate discussion!! Click on the icon to bring up a text box. Click on the icon again to make the text box go away Gets the crew involved. Gives the feeling of knowing it is ok to ask questions, give suggestions, see something, say something! The next slides will get directly into the task at hand. Visual, written and audio will all be used here! There are suggestions in the notes as to what to discuss. This will get the Team involved, creating communication channels to open!

Hang the required hardware Note the side that has two cutouts is opposite the system neutral.

Remove the transformer tank strap from all but the lighting transformer. Ground all of the transformer cases as well as the transformer cluster.

Connect all the H2’s together but do not connect them to ground (float the Wye Point).

Connect the primary jumpers Connect the primary jumpers. Leaving the high side jumpers connected to the system neutral until the entire connection is completed. H1 H2

Complete the secondary connections as diagramed. Center transformer connected as the lighting transformer X1 Neutral Lighting Lighting Wild Leg

Complete the secondary connections as diagramed. Right transformer connected as the lighting transformer X3 X1 X2 Neutral Lighting Wild Leg Lighting

Complete the secondary connections as diagramed. Left transformer connected as the lighting transformer X2 X1 Neutral Lighting Wild Leg Lighting

To prevent the surge in voltage during energizing, Temporarily ground the primary Wye point during energizing. X1 X2 Neutral lighting lighting Wild Leg

To prevent the surge in voltage during energizing, Temporarily ground the primary Wye point during energizing. A fourth cutout can be added to assist in this for switching. X1 Neutral lighting lighting Wild Leg