Cardinal — transformer oil pumps (centrifugal and axial) with TecSonics bearing monitoring
Cardinal transformer oil pumps of centrifugal and axial types for power transformer cooling systems. They work together with transformer oil coolers in continuous operation at temperatures from −40 to +100 °C. The range includes hundreds of configurations.
- Types
- centrifugal and axial flow pumps, hundreds of configurations
- Casing
- class 30 cast iron, split casing
- Pumped medium temperature
- −40 to +100 °C, continuous
- Motors
- 50 and 60 Hz; special insulation for liquids other than mineral oil
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Cardinal pumps are produced by the company and supplied together with its transformer oil coolers. There are two main types, centrifugal and with an axial impeller. The pumps are designed for extreme temperatures, long service life and minimal maintenance, and on request they are made to the dimensions and characteristics of existing pumps, including for railway cars. In forced oil circulation circuits, heat removal from the transformer windings depends on the pump, so service life and tightness are decisive here.
The casing is split. The pump and motor housings, impellers and volutes are cast from class 30 cast iron. The impellers are designed so that after the pump stops the oil can circulate by thermosiphon, naturally. The sleeve bearings have a large thrust surface, the journals and thrust surfaces of the shafts are ground between centers, and the shafts, impellers and motor rotors are dynamically balanced. Grinding gives alignment and a clean surface, and balancing extends operation without vibration.
Bearings are offered in three types: standard, Harley and Harley with the TecSonics wear monitoring system. TecSonics serves as a predictive maintenance tool and shows the condition of the pump bearings in the user's application.
The pump operates continuously at pumped medium temperatures from −40 to +100 °C. Oil-immersed high-efficiency motors are made for 50 and 60 Hz, for one or two voltages, single-phase or three-phase, with special insulation for cooling liquids other than transformer oil. The outside of the pump is protected by an anti-corrosion coating, and on request the internal surfaces of the casing are coated as well. Inspection plugs allow the direction of rotation to be checked after installation on the transformer.
Each pump-motor unit is pressure tested at 50 psig. The windings are tested for 60 seconds at twice the working voltage plus 1000 V, winding resistance is measured before and after assembly, and insulation is checked with a megohmmeter. On request a run-in is performed and certified performance data are issued. The pumps are installed in the cooling systems of ODAF, OFAF and OFWF transformers at substations and power plants, replace old pumps during upgrades, and are supplied with Cardinal fittings.
Technical specifications
| Types | centrifugal and axial flow pumps, hundreds of configurations |
|---|---|
| Casing | class 30 cast iron, split casing |
| Pumped medium temperature | −40 to +100 °C, continuous |
| Motors | 50 and 60 Hz; special insulation for liquids other than mineral oil |
| Bearings | sleeve bearings: standard, Harley, Harley with TecSonics wear monitoring |
| Testing | unit pressure test 50 psig, winding electrical tests, run-in, certified performance |
| Design | impellers allow natural thermosiphon circulation |
Replacement for
transformer oil electric pumps ЭЦТ, ЭЦТЭ
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
Cardinal — transformer oil pumps (centrifugal and axial) with TecSonics bearing monitoring. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8413 70 81 00 8413 81 00 00 |
|---|---|
| HS, 6 digits | 8413 70 |
| CN (EU) | 8413 70 81 8413 81 00 |
| HTSUS (USA) | 8413 70 20 90 8413 81 00 40 |
| China customs tariff | 8413 70 99 90 8413 81 00 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
In what temperature range do Cardinal pumps operate?
Continuous operation is allowed at a pumped medium temperature from −40 to +100 °C.
Which motors are fitted to the pumps?
Oil-immersed motors for 50 or 60 Hz, single-phase or three-phase, for one or two voltages.
How are the pumps tested at the factory?
Each unit is pressure tested at 50 psig, the windings are tested for 60 seconds at raised voltage, and the insulation is checked with a megohmmeter.
Similar equipment from other manufacturers
