Tap Changer Filter System
TP3

On-Line Oil Filtration for Load Tap Changer Compartments

The TP3 was developed in response to the utility industry’s desire to reduce operation and maintenance costs and increase system reliability. On-line oil filtration has proven to be an effective means of combating LTC problems. Tap changers retrofitted with a TP3 enjoy the following:

• Consistent high oil dielectric strength
  
• Extended maintenance/inspection intervals
  
• Reduced contact wear and coking
  
• Extended oil life
  
• Reduced contact erosion via reduced restrikes during tap changing

The Velcon TP3 is recommended for installation on tap changers that:

• Perform a high number of operations
  
• Exhibit consistent sludging conditions
  
• Have a high tap-to-tap voltage difference
  
• Require frequent attention

Quality components and comprehensive design features have made the TP3 an industry standard for on-line filtration. All components are fully enclosed in a NEMA 4 cabinet. Operation of the unit is unattended (and controlled by a mechanical timer). A flow rate of 3 gpm keeps turbulence in the reservoir to a minimum and allows for maximum filter life.

FEATURES

Automatic Shut-Off
Pressure switch turns the system off when filter is plugged. Relay can be wired to remote alarm or indicator light.

Oil Make-Up
LTC reservoir can be topped off using 3-way valve oil make-up port.

Hour Meter
Records run time of system to assure user of consistent operation.

Timer
24-hour mechanical timer can be set for hours of daily operation.

SPECIFICATIONS

Mechanical

Flow Rate:
3 gallons per minute

Cabinet:
NEMA 4 enclosure, painted grey acrylic, easy-opening handle with lock and 3-point latch, with louvers and filters, UL/CSA approved. Dimensions are: 43” x 30” x 12” (H-W-D)

Pump:
Heavy-duty, self-priming, positive displacement gear pump with built-in pressure relief valve and mechanical seal.

Piping:
Stainless steel tubing, JIC hydraulic fittings. External connections are 1/2” female NPT.

Filter Vessel:
Velcon Model VF-71E, with manual vent and static pressure gauge, is epoxy coated internally and externally. No tools required for filter changeout.

Filter:
Velcon Model FO-718PL1/2 comes installed for removal of carbon contamination.

Sight Glass:
150 psi maximum working pressure for oil flow indication.

Electrical

Motor:
1/2 hp, 120V, 1-phase, 1740 rpm, TEFC

Control box:
NEMA 12 with high pressure switch, latching relay, magnetic contactor, hour meter, and manual starter/disconnect with 10 amp heater overload

Wiring:
16 ga., XLPE grade, all terminal connections

Power requirements:
120 vac, single-phase, 10 amps

ORDERING INFORMATION

Specify model number as shown below. Units are shipped with cartridge installed.

System Part Number: TP3-1 (120V, 1ph, 60Hz)
Also Available: 3-phase power, 50 Hz power (contact factory)
Weight: 250 pounds
Shipping Weight: 325 pounds
Crated Dimensions: 47” x 34” x 21”

OPTIONS & ACCESSORIES

RECOMMENDED SPARES

Tap Changer Filter System TP# - Data Sheet #1775