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SES321-900

Cargo Trailer Mounted
Insulating Oil Purifier

This compact, easily towed, 1200 GPH system dries transformers and prepares mineral and ester-based insulating fluids for transformer service.

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This compact 1200 GPH mobile insulating oil conditioning system is designed for single pass conditioning of new and in service (Group I & II) insulating fluids, increasing voltage values (dielectric strength) by removing dissolved water, dissolved gas, solid matter contamination. The SES321-900 includes vacuum dry out capabilities and can be used to vacuum filling. 

SES321-900 Highlights

Conditions Mineral & Natural Ester Fluids

Single Pass Processing

20 GPM  (4542 LPH)  Max Flow Rate

96 kW Electric Heating

750 Cfm Vacuum System

Transformer Evacuation

 

More Specifications

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Mineral OilNatural Ester Fluids

Processing Rate

15 GPM  |  3407 LPH

De-rate processing rate and heating capacity by 25%

Max Flow Rate

20 GPM  |  4542 LPH

Dielectric Strength
(ASTM-D1816-84A)

(2 mm gap)

> 65 kV

> 60 kV

Moisture Content
Single pass

(ASTM-D1533-88)

100 ppm reduced to < 10 ppm
50 ppm reduced to < 5 ppm

200 ppm reduced to < 30 ppm

Moisture Content
3 Passes

(ASTM-D1533-88)

100 ppm reduced to < 2 ppm 200 ppm reduced to < 20 ppm

Total Gas Content
Single Pass
(ASTM-D2945)

Saturation reduced to < 0.25%

Saturation reduced to < 0.25%

Total Gas Content
3 Passes
(ASTM-D2945)
Saturation reduced to < 0.15% Saturation reduced to < 0.15%

Particulate Content

99.9%  > 1 μ
97.8%  > ½ μ

99.8%  > 1 μ

Processing Temperature
(Adjustable)

Min 120 F° | 49 C°
Max Limit 190 F° | 88 C°

Min 170 F° | 76 C°
Max Limit 190 F° | 88 C°

Processing Vacuum Level
     

1.5 - 0.3 Torr

1.5 - 0.3 Torr

 

 

Standard Flow Circuit

  • Automatic internal recirculation – no valves to adjust
  • Automation degas chamber level control
  • Discharge pressure is automatically controlled and adjustable to 80 psi
  • Discharge adjustable from 0 – 100% of circulation rate
  • Built-in hose suck back and drain capability

Oil Pumping System

  • Two pump systems. Inlet pump standard
  • Direct mount low-speed positive displacement screw pumps
  • Viton mechanical seals
  • External relief valves
  • OPTIONAL: Inlet oil booster pump for evacuated transformer circulation

Electric Heating Systems

  • Low watt density heating does not degrade oil
  • (3) 32 kW heater banks
  • Heater banks can be disabled at the control panel to reduce amperage requirement if necessary
  • Digital PID temperature control
  • Oil flow and over temperature safety interlocks provided

Filtration System

  • Coarse inlet pump strainer provided
  • Dual ASME code filter housings provide two-stage particulate filtration. 3 & 0.5 micron
  • Pleated synthetic media.
  • 99.8% efficiency
  • Local dirty filter gauges standard
  • Automatic air bleed standard
  • OPTIONAL
    • Dirty filter alarms
    • oversized inlet housing

Degasification System

  • Three stage dispersal system
  • Single-pass performance
  • 316 SS chamber shell and interior components
  • Automatic non-pilot operated level control system
  • Primary dispersing system
  • Transparent chamber cover on system 
  • Safety high-level overflow shutdown interlock switch
  • Low-level warning switch
  • Fiber optic foam control system
  • Automatic vent

Vacuum System

  • Two-stage system
  • System capacity is sized at 0.5 Torr for 1.25X the maximum oil conditioning vapor load.
  • Vacuum system blank off pressure is < 0.05 Torr
  • Vacuum systems can be isolated for dedicated transformer evacuation
  • 304SS vacuum system piping
  • Vacuum booster pump inlet safety oil trap w/ shutdown interlock is provided.

Protects vacuum booster pump from a chamber or transformer overflow

  • Backing vacuum pumps:
    • Rotary vane standard
    • Two-stage rotary piston pumps optional
  • Vacuum booster pumps:
    • Direct drive Roots-style rotary lobe pumps are standard on all system sizes
  • OPTIONAL: Fail closed external vacuum line actuated valves

Local Instrumentation 

  • Inlet Suction Gauge
  • Inlet Temperature Gauge
  • Filter Inlet & Outlet Gauges
  • Dirty Filter Gauges
  • Chamber Manifold Vacuum Gauge
  • Discharge Pressure Gauge
  • Discharge Temperature Gauge
  • Flow Rate Meter
  • Dual Register Positive Displacement Flow Totaling Meter
  • OPTIONAL
    • Remote Transformer Vacuum Gauge (760 torr - 0.01 torr)
    • Inlet Moisture
    • Outlet Moisture
    • External Vacuum Line Dew Point

Electrical System

  • Control package built to NEMA and IEC specifications
  • Main Power Disconnect Breaker
  • 100% Circuit Break Protection
  • IEC Motor Starters and Overload Protection
  • Circuit Break Protected Heater Contactors
  • Individually Controlled Banked Heaters
  • System House Meter
  • Vacuum Pump Hour Meter
  • Alarm Horn
  • Amp Meter
  • Phase Indicator

Switch & Pilot Control Package

  • PLC Logic is used to provide unattended automatic fail-safe operation
  • Illuminated selector switches are provided for manual motor/heater bank control  and status
  • Audible alarm provided
  • 7" HMI provided for alarm condition indication
  • OPTIONAL: Data logging

Construction

  • Skid mounted with a recessed deck plate for drip collection.
  • System design facilitates easy access for maintenance and operation.
  • Piping
    • All oil piping is welded carbon steel w/ butt weld or socket fittings. All vapor and water piping is stainless steel with w/ but weld or socket weld fittings. Maintenance connections use bolted flanges or O-ring sealed unions. Threaded unions are not used. Threaded connections are kept to a minimum.
  • Instrumentation Tubing
    • Oil filled tubing is 1/4" carbon steel w/ carbon steel compression fittings.
  • Electrical Conduit
    • A combination of ridged and liquid-tight flexible conduit is used to provide a watertight easy maintenance wiring system

Oil Pumping System

  • Inlet oil booster pump for evacuated transformer circulation

Filtration System

  • Dirty filter alarms
  • Oversized inlet housing

Vacuum System

  • Fail closed external vacuum line actuated valves

Instrumentation

  • Remote Transformer Vacuum Gauge (760 Torr – 0.01 Torr)
  • Inlet Moisture & Temperature Monitor
  • Outlet Moisture & Temperature Monitor
  • External Vacuum Line Dew Point Monitor

Control Package

  • Data logging

The SES321-900 is a mobile cargo trailer mounted system 

 

  • Cargo Trailer Mounting
    All cargo trailers are specifically engineered to accommodate equipment load, weight distribution, to provide optimum towing conditions. Cargo trailer weight capacities (GVRW) range from 4,000 to 16,000 Lbs. SESCO will provide the cargo trailer size and weight capacity options available for the system being quoted.

 

SES321-900 Trailer Specification

  • Enclosed Tandem Axles Bumper Hitch Cargo Trailer
  • Bumper Hitch
    • Ball or pintle ring
  • Length
    • 20’ OAL 
    • 16’ compartment length
  • Width
    • 94” OAW
    • 72” Compartment width
  • Height 
    • 105” OAH
    • 80” Interior height
  • Axles 
    • Dual 7000 Lbs w/ Tor-flex suspension
  • Weight
    • GVRW 9800 Lbs 
    • SES320-900C curb weight 8500 Lbs 
  • Brakes 
    • Electric drum
  • Construction
    • Steel tubular main beams
    • Aluminum Roof
    • Steel diamond plate over Drymax subfloor 
    • Aluminum sheet & post sidewalls
    • Lined interior sidewalls 
    • DOT LED lighting
    • Radial tires w/ spare
    • (2) Full swing rear doors w/ double locking cams 
    • (1) 28” x 78” Curbside entry door
  • Oil Connection Options
    • Single or dual rear 
  • Vacuum Connection Options
    • Single rear door accessible
  • Steps
    • (2) Heavy duty aluminum step assemblies
  • Ventilation
    • (1) 16” 115V flush mount ventilation fan/intake louver assembly 
  • LED Lighting
    • (2) Exterior flush wall mount flood
    • (2) Interior ceiling mount 
  • 120V/1PH Power
    • Load center circuit breaker controlled
    • (2) Exterior GFIC Outlets (1) 15 circuit
    • (3) Interior GFIC Outlets (1) 15 circuit

Trailer Dress Out Options 

  • Heating
    • (1) Three phase 5 kW forced air heater w/ thermostat