Single Phase Transformer Pole Mounted

  • Primary Voltage Ratings: 34.5-19.92/13.8-7.957/13.2-7.62/12.47-7.2 or others
  • Secondary Voltage Ratings: 120-240/240-480/347/600V or others
  • H.V. TAP RANGE: ±2×2.5% or others
  • TYPE: Conventional type/CSP type

Daelim single phase pole mounted transformer with UL/cUL, CSA, IEEE, and CESI certificates. Single phase transformer is an oil-immersed transformer, and there are two types of single-phase transformers: Conventional Type and CSP Type. Rating ranging from 5 kVA to 167 kVA.

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25 kva single phase transformer50 kva single phase pole mounted transformer37.5 kva single phase pole mounted transformer

Single Phase Pole Mounted Transformer Certificates

Daelim single phase pole mounted transformer has a series of certificates such as UL/cUL, CSA, and CESI. In addition, many years of market experience in North America and South America in the United States, Canada, Honduras, and other North America.

single phase pole mounted transformerul listed single phase transformer

Single Phase Transformer Details

Single phase pole mounted transformer is a distribution type transformer. Oil-filled single-phase overhead transformers designed and produced by Daelim are normally used for stepping utility distribution voltages (ranging from 2400 to 34500 volis) down to lower uilization volages. Although some are used for stepping down to commercial and industrial voltages such as 277, 240/480, 2400 and 4800, most are used for stepping down to the single-phase voltage of 120/240.


Single Phase Transformer Specifications

Single Phase Distribution Transformer
Rated Power  High Voltage  Low Voltage W(mm) D(mm) H(mm) Weight(kg)
5 kVA
or others

400 530 960 115
10 kVA 430 530 980 150
15 kVA 480 580 1000 205
25 kVA 500 580 1030 245
37.5 kVA 560 640 1080 335
50 kVA 560 640 1130 370
75 kVA 780 800 1170 505
100 kVA 710 800 1230 530
167 kVA 795 895 1335 680


Single Phase Transformer Types

single phase pole mounted transformer types
There are two types of single-phase transformers, one Conventional Type and the other CSP Type. Ratings range from 5 kVA to 167 kVA.


Conventional Type

The transformer is a cylinder-sealing structure. Each one is fixed with grounding devices, hooks, and supporting lugs that conform to ANSI standards, and or ore two high voltage bushing on the cover, low voltage bushing on the wall of the tank, and eyebolt, connecting terminals. The tap changer should be adjusted based on the instruction after the power is off.

single phase transformer types

CSP Type

This type of sing-phase transformer can protect itself from thunder and lightning, short circuits, and protect the transiting and distribution line from current failure because of self-malfunction.


Except for some similarities such as cylinder tanks, hooks, lifting lugs, grounding devices, nameplates, core, and winding with the conventional type. This type of sing phase transformer has characteristics and devices as follows:

One or two high voltage bushings are on the cover with a fuse.


One or two arresters are installed on the wall of the tank, whose top end is near the voltage bushing, and connected to the bushing by a copper strip. One secondary breaker switch is above the winding inside the tank, and here are the operating handle, overload reset, and signal light.

All units are built in accordance with IEC60076, ANSI/IEEEC57.12.20, CSA C2.1-06, CSA C2.2-06 and etc.

csp single phase transformer

Catalog Download

Single Phase Transformer PDF


Single Phase Pole Mounted Transformer Optional Accessory

Surge arrester Low voltage circuit breaker
Protective link 4a/Circuit breaker emergency control
Current-limiting fuse 4b/Signal light
Protecto-combo Tap changer
Dual voltage switch Tank pressure relief

single phase transformer optional accessory


Daelim also has single phase pad mounted transformer


Single Phase Transformer Test

Each single phase transformer was tested in strict accordance with the latest revision of applicable ANSITM, IEEETMCSA, and NEMA with test reports available by serial number of the transformer

Routine tests are:

·Leak test

·Polarity and phase relation


·No-load losses and excitation current

·Load losses and impedance

·Applied voltage

·Induced voltage

·Full wave impulse

·Ratio test


Single Phase Transformer Test Report

Single Phase Transformer Test Report
Rated Capacity 15 Product
60HZ Factory Serial
3Voltage Combination HV(kV) 19.92 Current HV(A) 0.753 Angular displacement II0
LV(kV) 0.24 LV(A) 62.5
2、 Measurement of voltage ratio
Tapping Position HV and LVThe Voltage Value of the Test
The Grade and Accuracy: QJ35 A
Grade 0.2
A 19920 240 0.048
B 19422 0.031
C 18924 0.064
D 18426 0.033
E 17928 0.067
3、 Measurement of winding resistance  Routine
Tapping Position Winding Resistance
HV (Ω) LV(Ω)
A 92.48 X1X2 (Ω) 0.01121
B 90.23
X2X3 (Ω) 0.005759
C 87.91
D 85.64
X1X3 (Ω) 0.01653
E 83.26
The Meter NO. and Grade of Accuracy BZC3395
Grade 0.2
Temperature 32 Humidity 65%
4No-load loss and no-load current test.
Test Items No-Load Loss at 100% rated voltage W No-Load Current %
Measured Value 53 0.41
5Load loss and Short circuit test.
Test Items Load Loss at 85°C and rated voltage W Total Loss W Short Circuit Impedance at 85°C
Measured Value 128.5 181.5 1.97
6、 Applied voltage test
Power Frequency
withstand Voltage Test
Test Time 60 S
The Test Voltage(kV) HV50 / LV5
7Induced Over Voltage Withstand Test
Induced Over Voltage
Withstand Test(kV)
8、 Insulation Resistance test
location Insulation Resistance( M  Ω)    at 10℃ R60
HV-E >1500
LV-E >1500
9、 Other Information.
The Active Parts
Weight of Lifting
The Weight of Insulation Oil Total Weight The Temperature Rise of the
Oil Pressure
120 70 230 65K 50KV
10Leakage test  Routine
Test method Applied pressurekPa Durationh Residual pressurekPa Result
The static pressure
20 24 18 No leakage and no
11、 Outer inspection
The nameplate, sign, earthing terminal, and mark of terminal meet the requirement. There is no evidence of leakage.


Single Phase Transformer Packaging

single phase pole mounted transformer packaging
There are two packaging methods of single -phase transformers, one is wooden pallet packaging, and the other is wooden frame packaging.


If it is transported by the cabinet, it is usually packed with wooden frames, which are more stable and reliable.


A 40 -foot cabinet, a single-phase transformer with a capacity below 50kva can be equipped with 60 units; 75kva single phase transformer can be equipped with 48 units; 100kva single phase transformer can be equipped with 36 units; 167kva single phase transformer can be equipped with 21 units.


100 kVA Single Phase Transformer Diagram

100kva single phase transformer diagram

167kva 1 phase transformer100 kva single phase pole mounted transformer75kva 1phase transformer

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