Power Transformer: Substation Units
General Characteristics:
Phases: Three
Frequency: 50 Hz, 60Hz
Standard: IEEE, CSA, IEC
Tank Type: Substation Generator Step-up transformers, Auto Transformers, or Step-Down Transformers
Base rating: 10 MVA Base through 350 MVA Top*
High Voltage (HV): 24.94 kV through 400 kV
Low Voltage (LV): 4.16 V through 230 KV
Tertiary Voltage: 34.5 KV buried or brought out.
Tap Changer: DETC, LTC In tank or out
Windings: Copper
*Available in various design configuration to accommodate application of the transformers
Type:
Generator Step-up transformers, Auto Transformers, or Step-Down Transformers
Cooling Info:
Winding Temp Rise: 55C, 55/65C, 65C, (50C, 60C for IEC)
Cooling Class: ONAN, ONAN/ONAF, ODAF, KNAN, KNAN/KNAF
Oil: Mineral Oil, FR3 Enviro Temp
Tank:
Tank Cover: Welded, Bolted
Tank Manholes: On Cover or Tank
Tank Base: Flat bottom or Skid under base,
HV Bushing Mounting: On top cover or in Air Terminal Chamber
LV Bushing Mounting: Cover mounted or in Air Terminal Chamber
Sealed tank, Inert Air with Positive Pressure, or Conservator
Paint: Standard Gray (ASA #70 GRAY), Customizable Colors, etc.
Steel: Mild Steel
Bushings:
HV Bushing Location: IEEE segment 1-4, Cover or Side
HV Terminations: Porcelain Condenser, Solid Bulk, Solid Dielectric, Quick link
LV Bushing Location: IEEE segment 1-4, Cover or Side
LV Terminations: Porcelain Condenser, Solid Bulk, Solid Dielectric, Quick link,
Controls:
Cabinet: NEMA 3R, 4, 4X
LTC Controllers: Beckwith, TAPCON
Monitors: SEL Relays, Advance Power TTC, Eclipse, ITM 509, Dynamic Ratings
Annunciators: SEL, Seekirk
Accessories:
Arresters: Distribution Class, Intermediate Class, Station Class
Fill/ Drain Provisions: Valve, Valve w/ Sampler
Gauges: Liquid Level, Liquid Temperature, Pressure Vacuum, Winding Temperature, Additional Contacts, etc.
Pressure Relief Devices: Pressure Relief Valve, Cover Mounted Pressure Relief Device, etc.
Misc.: Rapid Rise Relay, Fill Valve, Gas Test Valve, Grounding Resistor, Ground Lugs, Schrader Valve, Ground Pads, Metering, Fiber Optic Sensors, On Line Dissolved Gas Monitor, Bushing Potential Device, etc.
