Partner Technologies - Power Transformers

Power Transformers

PTI Power Transformers are designed and manufactured to meet specific customer requirements and specifications along with the applicable CSA, ANSI, NEMA, IEEE, IEC Standards. PTI prides itself in design flexibility which allows our products to be optimized to customer needs while continuing to meet the highest standards of quality and manufacturing techniques.

Product Brief

View our Small & Medium Power Transformer Brochure and our Three Phase Regulating Transformer

Small Power

Single Phase and Three Phase Small Power Transformers are available in a variety of configurations in accordance with the latest versions of CSA, ANSI, and IEC Specifications.

These transformers can also be customized to meet the requirements of individual industrial, commercial, and utility specifications.

The transformers can be provided with a variety of Terminations to meet customer requirements for new installations, replacement or retrofit situations.

A variety of Cooling Fluids are also available to meet the necessary flame retardent and/or environmental conditions.

Transformers are generally of Shell Type Construction and are available up to 5000kva and 69Kv Insulation Class.

Standard Features

All features listed as standard in the appropriate CSA, ANSI, or IEC Standard. These are generally as listed below.

Fully Mitred Step-Lap Core Design
Circular Coil Construction
Externally Operated De-Energized Tapswitch
Provision for Lifting and Jacking
Primary and Secondary terminations in the form of:
- Cover Mounted Bushings
- Sidewall or Cover Mounted Throats
- Sidewall, Top or Bottom Entry, Cable Junction Boxes
Tank Base suitable for Hauling or Skidding
Stainless Steel faced Ground Pads
Standard Powder Coat Paint Finish
Standard Finish Colours:
- ASA 70 Grey - (Munsell 5.0 BG 7.0/0.4)
- Equipment (Dark) Green - (Munsell 9 GY 1.5/2.6)
- Seafoam Green - (Munsell 4.82 G 4.07/3.35)
See page giving details of standard method of Radiator Mounting
Supplied with 55C, 65C, or dual 55/65C Temperature Rise. Look below to Table 2 for uprating details. For Cooling class designations table click here.

Table 1 - Standard Accessories

	CSA C88	CSA C88	CSA C2	ANSI C57	ANSI C57
Accessory	Conservator	Sealed		<2500Kva	>200Kv BIL
Conservator (a)	Yes	No	No	No	No
Non Dehydrating Breather	Yes	No	No	No	No
Pressure Relief Device (b)	Yes	Yes	No	No	Yes
Pressure Relief Device (c)	No	No	Yes	No	No
Liquid Level Gauge (d)	Yes	Yes	No	No	Yes
Top Oil Thermometer (e)	Yes	Yes	No	No	Yes
Drain Valve	Yes	Yes	No	Yes	Yes
Drain Plug	No	No	No	No	No
Sample Valve	Yes	Yes	No	See (f)	See (f)
Top Filter Valve	Yes	Yes	No	Yes	Yes
Vacuum/Pressure Gauge	Yes	Yes	No	No	Yes
Explanation Notes: (a) Conservator is complete with Drain and Shut Off Valves (b) This is the large automatic/self sealing emergency relief device (c) This is the small manual/automatic relief device (50scfm @ 15psig) (d) No contacts supplied up to 7500Kva (e) Contacts supplied over 1000Kva (f) Sample Device is part of the Drain Valve

Table 2 - ONAN/ONAF & 55/65C kVA Ratings


	ONAN	ONAN/ONAF*	ONAN/ONAF*	OA/FA**	OA/FA**
Typical ONAN Kva Rating	55°/65°C***	55°C	55°/65°C***	55°C	55°/65°C***
@ 55°C
500	500/560	500/665	500/745	500/625	500/700
750	750/840	750/1000	750/1120	750/940	750/1050
1000	1000/1120	1000/1333	1000/1500	1000/1250	1000/1400
1500	1500/1680	1500/2000	1500/2235	1500/1875	1500/2100
2000	2000/2240	2000/2667	2000/2980	2000/2500	2000/2800
2500	2500/2800	2500/3325	2500/3725	2500/3125	2500/3500
3000	3000/3360	3000/4000	3000/4470	3000/3750	3000/4200
4000	4000/4480	4000/5333	4000/5960	4000/5000	4000/5600
5000	5000/5600	5000/6667	5000/7450	5000/6250	5000/7000
* - CSA Designation with 33% uprating with Fan Cooling - ANSI Designation with 25% uprating with Fan Cooling * - 55/65C Temperature Rating allows 12% uprating

Optional Features

All features listed as "optional extras" in the appropriate CSA, ANSI, or IEC Standard. These can include such items as listed below.

50Hz designs
55C or 55/65C temperature rise designs
Fan Cooling Package(s) for ONAF operation
Special designs for high Ambient Temperature site conditions
Special designs for high altitude, over 1000m, site conditions
Multiple Voltage Primary or Secondary Windings
Special de-energized Tap ranges
All copper winding designs
Alternate cooling liquids for less-flammable or environmental requirements
Primary and Secondary Lightning Arresters as Distribution, Intermediate, or Station Class
Lightning Arrester Discharge Counters
Primary, Secondary, and Neutral Current Transformers for Relaying or Metering Applications
On Load Tapchanging Equipment
Neutral Grounding Resistors
Winding Temperature Indicators
Sudden Pressure (Rapid Rise) Relay
Conservator Design
Gas Detector Relay
Silica Gel Dehydrating Breather
Detachable Cooling Radiators with Shut Off Valves
Pressure Vacuum Bleeder Device
Various contact arrangements on all devices and gauges
Water Coolers in lieu of traditional cooling radiators
Special designs to match existing equipment locations
Ground Fault Protection
Siesmic Boltdown and Certification
Special Paint Finishes for corrosive environments
Special Finish Colours

Many other features, protective devices, components, and variations are available upon request.

Typical Outline Drawing

Medium Power

Single Phase and Three Phase Medium Power Transformers are available in a variety of configurations in accordance with the latest versions of CSA, ANSI, and IEC Specifications.

These transformers can also be customized to meet the requirements of individual industrial, commercial, co-generation and utility specifications.

The transformers can be provided with a variety of terminations to meet customer requirements for new installations, replacement or retrofit situations.

A variety of cooling fluids are also available to meet the necessary environmental conditions.

Transformers are generally of Core Type Construction and are available up to base rating of 30MVA at 145kV with or without Load Tapchanging Equipment.