Transformer GPO-3 Drawing Bar Supporting Bar
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Transformer GPO-3 Drawing Bar Supporting Bar

Transformer GPO-3 Drawing Bar Supporting Bar

GPO-3 drawing bar, also known as square bar, ventilation bar, etc., are a type of profile produced by impregnating alkali-free fiberglass mat with thermosetting resin through a molding process. It has the advantages of high mechanical strength, excellent electrical properties, flame retardancy, corrosion resistance, arc resistance, etc. It is mainly used for interlayer ventilation and cooling of dry-type transformers and for reactors and wave arresters.
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Description

GPO-3 drawing bar produced by cutting and processing from GPO-3 insulation sheet,it is different production process as FRP pultruded square bar.FRP bar is made of fiberglass resin with pultruded process,and GPO-3 is fiberglass mat in molding process.GPO-3 squre bar has higher mechanical strength than FRP square bar.

 

1. Our Production

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2. Product Description

A glass reinforced thermoset polyester with good electrical characteristics in ark and track resistance is GPO3 polyester glass laminate. It is suitable for a wide range of applications in the mechanical and electro-mechanical fields thanks to its exceptional strength, dimensional stability, and stiffness. The substance is flame-resistant since it complies with Nema GPO3 specifications.

Due to its great rigidity and stiffness, GPO3 is simple to process. It is popular for bespoke structural elements and components that need great durability and stability due to the same qualities. We have a number of internal CNC facilities, including milling, turning, sawing, and drilling tools, that enable us to transform this material.

 

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3. Quick Details

Standards

IEC893/EN 60893 Grade: UPGM 203

NEMA L1: GPO-3

Size

15x15mm

18x18mm

20x20mm

25x25mm

30x30mm

Customized size

Color

Red,White,Grey,Brown,Yellow,Black or Customized color

Production Capacity

Max 300tons per month

Appearance

Surface is smooth,flat without bubbles and cracks

Packing

Wrapped with PP film outside and pallets with IPPC marks

 

4. Application

GPO-3 square bar can be machined, punched, drilled, milled, sawed, sanded, sheared, or milled and have great mechanical strength. It is also feasible to assemble using glue, metal screws, or rivets. It also works well in electrical applications such as transformer & reactor special-purpose airway support is used extensively in equipmnents of Power controller & Power transmits as cable bridge & angle insulation; insulating channel of Bus duct & fuse;insulating support of Inverter,converter etc.

 

5. General Applications:

1

Circuit Breakers

Safety baffle,safety shutter,spacer,interphase partition that require insulating materials are flame retardant, heat resistance, weather resistance, high insulation performance, and mechanical strength.

Motor Industry

Used as motor armature parts, movable cover plate, slot wedge stator, fixed gasket, thin gasket, carbon brush plate.

Switchgear Industry

Used as switchgear clapboard, lining plate, arc extinguishing cover, arc extinguishing cylinder, arc extinguishing sheet, arc isolating plate, terminal block, interphase insulation, bottom end clapboard and contact support.

Transformers Industry

Used as structural supports of switches and transformers, bus clamps, etc.

Traffic engineering

In traffic transit such as rail and auto industry, there are many modules like motor, traction motor, or interior decoration that will use UPGM203 parts that required safety performance flame retardant V0 grade, temperature resistance Class F or above.

Wind Power Generation

When wind power generation generating electricity,UPGM203 parts are mostly used in wind energy motors.

Solar Industry

The photovoltaic system is composed of photovoltaic modules, bus boxes, inverter cabinets, distribution cabinets, transformers, and power grids. UPGM203 sheet used for supporting, load-bearing, and isolation in inverter cabinets, distribution cabinets, bus cabinets, and switch cabinets.

 

6. Technical Data Sheet

No.

Testing Item

Measurement

Requirement

Result

Testing Methord

1

Tensile Strength

MPa

 

130

ASTM D638-14

2

Tensile Modulus of Elasticity

MPa

____

9.07x103

3

Flexural Strength

MPa

--

230

ASTM D790-17

4

Vertical Compression Strength

MPa

____

306

ASTM D695-15

5

Vertical Electrical

Strength(Rapid Rise in normal oil)

MV/m

____

23.7

ASTM D149-09

(2013)

6

Vertical Flashover

Voltage (Rapid Rise in the air)

KV

____

38.1

7

Parallel Puncture Voltage(Rapid Rise in normal oil)

KV

____

81.0

8

Arc Resistance

S

--

182

ASTM D495-14

9

Comparative Tracking

Index

____

____

CTI 600

ASTM D3638-12

10

Insulation Resistance

Normal

Ω

--

5.7x1013

ASTM D257-14

24H

in Water

1.7x1012

11

Flammability

Grade

--

V-0

UL 94:20065

12

Oxygen Index

%

 

32.3

ASTM D2863-10

13

Water Absorption

%

--

0.27

ASTM D570-98

14

Density

g/cm3

 

1.74

ASTM D792-13

15

Coefficient of Thermal Expansion(20℃-100℃) (Parallel)

10-6/℃

--

23.5

ASTM D696-16

16

Thermal Conductivity(60℃)

W/m·K

 

0.605

ASTM C518-17

17

Heat Distortion

Temperature

℃

____

>240

ISO 75-1:2013

18

Flammability

Grade

____

V-0

UL 94-2013

 

7. Our Certificate

We have passed ISO9001 Quality Management Mystem, ISO14001 Environmental Management System, and our UPGM203 and SMC Insulation Sheet have certified by RoHS and Reach certification.

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8.Our Overseas Exhibition

We actively participated in foreign related industry exhibitions, such CWIEME in Germany and Shanghai,AEC in France,Big5 in Dubai and Elecrama in India to bring our customers the best insulation products.

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9. Packing and Delivery

We provide our customers with strong kraft paper and belt to ensure the safety of packing,also use PP film wrapped outside to avoid the damage and moisture in transit. We use wooden pallets with IPPC marks and fumigation certificate, which fully meet the importing countries crequirements.

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