Automatic Load Tap Changing and 3 Phase Regulator Transformers
25 MVA Base with up to 46.67 MVA capacity. HV is 138,000 volts. Designed for municiple power facility in Illinois. Transformer has Reinhausen RMV-II load tap changer with Beckwith controls.
LTC FEATURES
Tap Changer Types:
• Reactive vacuum
• Resistive
LTC Ranges: Plus or minus 10 percent in thirty-two
5/8 percent steps
LTC Controls: Automatic or manual local control
TRANSFORMER FEATURES
RANGE
- 2 to 100 MVA
- 15KV to 230KV voltage class
Loading
- Designed to deliver rated current and MVA in all tap positions.
Service
- Outdoor
Basic Impulse Level (BIL)
- Per ANSI standard
Impedance
- ANSI standard
Fluid Preservation
- Sealed tank or conservator
Cooling Radiators
- Plate type
Nameplate
- Stainless steel
- Engraved
Gauges and Accessories
- Liquid temperature indicator
- Liquid level gauge
- Vacuum pressure gauge
- Drain valves
- Filter press connections (top and bottom)
- Automatic pressure relief device
- Control wiring in flexible conduit
- Other accessories available
Coils
- Aluminum or copper conductor
- Circular construction
- Continuous or helical disc
- Barrel wound
Cooling Fluid
- Type II mineral oil
- R-Temp or Silicone oil available up to 15 MVA
Paint
- ANSI 61 enamel on sandblasted surface
- Other colors available
OTHER
- Welded top cover
- 19-in manhole covers
- Provisions on base for skidding
- Transformer lifting lugs
- Stainless steel ground pads
OPTIONAL FEATURES
- Reconnectable windings
- Regulating winding on either HV or LV
- Non-standard impedance
- Epoxy paint in your choice of color
- Demountable radiators with isolation valves
- Galvanized radiators
- Terminal throats and chambers
- Sloping roof
- Multi-stage fan cooling for increased MVA
- Other gauges and accessories
- Shock indicator
- Customer-specific controls and relays
ADDITIONAL FEATURES AVAILABLE
- Other tap changer types
- Rigid galvanized conduit wiring
- Remote controls with position indicator
- Provisions for parallel operation
- Potential transformer for voltage signal
- Tap range other than plus or minus 10 percent or steps other than 5/8 percent
- SCADA interfaces for supervisory control
- Loss evaluated designs
- HV Load Tap Changing
SAMPLE OUTLINE FOR 25-50 MVA WITH LOAD TAP CHANGER
25 MVA Base with up to 46.67 MVA capacity. HV is 138,000
volts. Designed for municiple power facility in Illinois.
Transformer has Reinhausen RMV-II load tap changer with
Beckwith controls.
OTHER FEATURES
- Position indicator
- Operation counter
- Static voltage regulating relay
- Current transformer for line drop compensation
- Isolated compartment oil
- Manual tap operation from ground level
- Control panel with 3-point latching
- Automatic door light
- Power receptacle
- Anticondensation heater in control box