语言:

Mica Insulator

product No:
Unit:

Introduction

Mica insulator is an entirely mineral material that basically consists of mica and glass- a binding agent that can be vitrified by fusion. These elements are mixed and combined in powder form, and then heated under pressure: the particles of glass when they melt, cover the flakes of mica to form a compact and hard mass.
Glass-mica compounds hold a privileged position among the wide variety of insulators offered to the electrical industry. They are positioned by their temperature of use between plastics and ceramics but they possess the ability to be moulded and to be machined like the former but with the hardness and indestructible qualities of the latter. Mica insulator adds a series of physical and chemical properties to these practical advantages which makes it an entirely exceptional insulator.
Mica insulators can be used for high speed train break resistor, as ideal insulation materials.
We provide various types of insulator, R-M52 and R-M259 are two of them. The specification and characteristics are displayed as following tables.

 

Specification

Model

Type


M(mm)

p(mm)

l(mm)

Pitch

R-MV 52

A

2 tapped holes

10

12


150

B

2 tapped holes

10

12


175

C

1 tapped hole

10

12


150

1 threaded rod

10


35

150

D

1 tapped hole

10

12


175

1 threaded rod

12


35

175

R-MV 259 

A

2 tapped holes

8

8


125

B

2 tapped holes

10

8


150

D

1 thread rod

8


12

125

1 thread rod

8


28

125

E

1 tapped hole

8

8


125

1 thread rod

8


22

125

F

2 threaded rods

8


35

125

G

2 threaded rods

8


20

125

 

Characteristics



Unit

R-MV 52

R-MV 259

Mechanical
Characteristics

Tensile strength

daN

≥800

≥1900

End flexural strength (≥M8)

daN

≥160

≥400

Compressive strength

daN

≥3500

≥4000

Torsionresistance (≥M8)

dam.N

≥2.3

≥4.5

Electrical
Characteristics

Arc-over voltage (dry surface)

kV

≥18

≥26

Breakdown voltage

kV

≥20

≥30

Insulation resistance(1000V)

≥106

≥106

Capacitance (1kHz)

pF

≈10

≈18

Test
Conditions

Verification of insulators

Voltage

kV

16

22

Frequency

Hz

50

50

Duration

mn

1

1