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Reading Ge Serial Numbers
Ge Transformer Serial Numbers Doreen
Ge Transformer Serial Numbers And Date Codes
Ge Transformer Serial Number

Transformer nameplates contain several standard items of information and other optional information. Transformer nameplate must specify the following parameters:

Volt-Ampere (VA) or kilovolt-amperes (kVA) rating
The voltage rating of both the primary and secondary circuits
The impedance rating of the transformer (normally restricted to 25 kVA or larger)
The required clearances for transformers with ventilated openings
The amount and kind of insulating liquid where used.
On dry-type transformers (no liquid coolant or insulation), the nameplate listing must also include the class temperature rating of the winding insulation.

Fig.1: Transformer Nameplate

Transformer kVA Rating

The nameplate always indicates the size of the transformer in terms of how much apparent power (rated kVA) it is designed to deliver to the load on a continuous basis. By its very nature, the transformer will have more than one rated voltage, depending on which side we are looking at and how many windings there are on that side.

Transformer Voltage Ratings

The following is a list of some conventions for specifying transformer voltage ratings:

Each transformer receives all standard commercial tests in accordance with ANSI, IEEE, CSA and IEC, with test reports available by serial number of the transformer. Polarity of windings & angular displacement. Ratio. No-load loss & exciting current. Load loss & impedance. Lighting impulse (class II). Low-frequency dielectric. How to Determine the Age or Manufacture Date of a GE Appliance. To determine the age of your appliance, use your serial number (not model number) to find date of manufacture. Our serial numbers begin with two letters followed by six numbers. The 2 letters at the beginning of the serial number tell you the month and year it was made. Dongan Electric Manufacturing Company is backed by our team of in-house engineers, who manufacture only the best quality transformers, inductors and other power quality equipment. In business since 1909, we have a 110-year history of meeting the high demands of any industry. GE rises to the challenge of building a world that works. Learn how our dedicated team, leading technology, and global reach and capabilities help the world work more efficiently, reliably, and safely.

U-W

The dash between the voltages U and W indicates they are on different sides of the transformer. For example 480—120 tells us the primary winding is rated 480 V and the secondary is rated 120 V.

U/W

The slash indicates the two voltages are from the same winding and that both voltages are available;

g., 120/240 can indicate a 240 volt winding with a center tap.

U×W

The cross indicates a two-part winding that can be connected in series or parallel to give higher voltage or current, respectively. Only one voltage is available at a time; e.g., 120×40 indicates the transformer can operate at 120 V or 240 V, but not both simultaneously.

U Y/W

The Y indicates a three-phase winding connected in a wye conﬁguration. The ﬁrst letter (U) is the line voltage and the second letter (W) is the phase voltage (line to neutral). Clearly, U=√3 W. Examples include 208Y/ 120 and 480Y/277.

Transformer Rated Frequency

The rated frequency will also be indicated on the nameplate (usually 60 Hz for the United States). Operating the transformer at a lower frequency will increase the core flux unless the voltage is reduced, this could cause magnetic saturation of the core and overheating due to increased hysteresis and eddy current losses.

Maximum Temperature Rise

The maximum allowable temperature rise for the transformer is also shown on the nameplate and is based on an assumed ambient temperature of 30^oC.

Insulation Class

The insulation class indicates the type of transformer insulation.

Transformer Percentage Impedance

Percent impedance is a representation of the impedance of the windings referred to one side of the transformer. This number is the percentage of rated voltage that must be applied to the high side to cause rated current on the low side when the low side is shorted.

Other items that may be on the nameplate include the number of phases, a Wiring diagram, and tap-changing information.

Transformer Nameplate Information

Following are the key information which are provided on the transformer nameplate from the manufacturer.

Serial number	Number of phases
Frequency	Voltage rating
kVA Rating	Temperature Rise
Polarity	Percentage Impedance
Connection Diagram	Name of Manufacturer
Type of insulating liquid	Conductor Material for each Winding
Basic Insulation Level (BIL)	Total Weight (kg)

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Relectric Product Catalog

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405-SD-12969MA - Manufacturer General Electric / GE Part Name: 405-SD-12969MA; GEN; 208/115V; 5kVA; Transformer

9T83B3473G03 - Manufacturer General Electric / GE Part Name: 9T83B3473G03; AL 3P 45KVA 480-208Y/120 K13

9T23Q3464G03 - Manufacturer General Electric / GE Part Name: 9T23Q3464G03; 75kVA 480V Delta 208Y/120V Transformer

9T23Q9094G33 - Manufacturer General Electric / GE Part Name: 9T23Q9094G33; 75kVA 208V Delta 208Y/120V Transformer

9T83B3875 - Manufacturer General Electric / GE Part Name: 9T83B3875; 112.5 KVA 480 DELTA - 208Y/120V TRANSFORMER

9T83B3874 - Manufacturer General Electric / GE Part Name: 9T83B3874; 75 KVA 480 DELTA - 208Y/120V TRANSFORMER

9T58K2803G38 - Manufacturer General Electric / GE Part Name: 9T58K2803G38; .075 KVA 240/480-120/240V TRANSFORMER

9T51B0011 - Manufacturer General Electric / GE Part Name: 9T51B0011; 1.5kVA 480V TRANSFORMER

9T23L1574 - Manufacturer General Electric / GE Part Name: 9T23L1574; 75kVA 480V DELTA 208Y/120V TRANSFORMER

9T23Q9873 - Manufacturer General Electric / GE Part Name: 9T23Q9873; 45kVA 480V DELTA 208Y/120V TRANSFORMER

9T23Q9576G03A - Manufacturer General Electric / GE Part Name: 9T23Q9576G03A; 150kVA 480V DELTA 208Y/120V TRANSFORMER

9T23Q9574G83A - Manufacturer General Electric / GE Part Name: 9T23Q9574G83A; 45 kVA 480 DELTA - 208Y/120V TRANSFORMER

9T23Q9574G03 - Manufacturer General Electric / GE Part Name: 9T23Q9574G03; 75kVA 480V DELTA 208Y/120V TRANSFORMER

9T23B3812 - Manufacturer General Electric / GE Part Name: 9T23B3812; 30kVA; 240V Delta; 208/120; Transformer

9T18Y7240 - Manufacturer General Electric / GE Part Name: 9T18Y7240; 3 PHASE 225 KVA LUG KIT

9T21S1070 - Manufacture

Ge Transformer Serial Numbers