Data Requirements

1. Utility (or source) information:
   • Available short circuit current (at secondary and primary of transformer, if applicable) with X/R ratios (three phase and single-line-to-ground). This may include the length and type of primary cable.
   • Service transformer primary voltage, size, winding connections (wye-wye, delta-wye, etc.) and impedance.
   • Type of utility overcurrent protection on the service, e.g., fuse size and type; relay type, CT ratio, trip and time delay settings; recloser settings, etc.
2. The latest revision of the project design drawings, electrical oneline diagram (in pdf, dwg, dxf, or dgn format). Include bus riser diagram, all equipment schedules and the most recent project specifications.
3. Conduit type and cable list showing cable length, size, type and number of conductors per phase, insulation types, ground wire.
4. Switchgear, switchboard, MCC, panel, and ATS submittals showing the short circuit ratings, current and voltage ratings, bus type (copper or aluminum), all breaker types (mfgr, type, frame and sensor and plug/trip size). Include the exact trip unit type and available settings, ground fault trip relays and sensors. Note special protection including zone interlock, series ratings, fused switch ratings including fuse types.
5. Number, size, voltage rating, running load amps, locked rotor amps, and starter type of motors. For large motors, include submittal data or motor data sheets. Large motor data should include motor stall time, starting time with its applied mechanical load if started under load, and any special starting means or unique protective equipment (bearing RTD's, etc.). If motors are high efficiency, please supply typical submittal data. Include load profile data, if available.
6. A written, detailed sequence of operations for the facility including: information regarding load sequencing based on the number of generators on line, the minimum and maximum number of generators on line, generator to utility paralleling, utility to utility paralleling, and the number of chillers running and starting under various operational conditions.
7. Generator submittal data or generator data sheets, if applicable. This includes subtransient, transient, synchronous, negative sequence, and zero sequence reactances along with time constants, damage curves, and neutral grounding resistor information, if applicable. NOTE: Only recommended overcurrent protection settings will be provided in the study for multi-function generator protective relays unless generator data sheets are provided.
8. Transformer size, number, name, voltage ratings, impedance, and winding connections (wye-wye, wye-delta, etc.). Also, if the transformers are high efficiency or low inrush, provide typical submittal data. If transformers are padmount, what type of primary fusing is included?
9. UPS submittal drawings (if applicable) including UPS schematics and associated equipment including: (a) UPS module input and output circuit breaker sizes, types, available settings, and ratings (b) static bypass circuit breaker sizes, type, available settings, and ratings (c) maximum rectifier input current, both inrush and overload (d) overload capability of the module - at what value does it transfer to static bypass (e) short circuit (I2t) rating of the static switch (f) short circuit (I2t) rating of the input rectifier and the maximum short circuit output of the inverter module.

Please forward the data via email to jdm@powerstudyconsultants.com or call (770) 963-2898 for shipping instructions.