12kv embedded pole for vacuum circuit breaker EEP 12/1600 31.5 EEP 12/1250 31.5

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Embedded pole for vacuum circuit breaker 12kV EEP-12/1600-31.5 EEP-12/1250-31.5

 

Model No: EEP-12/1600-31.5     EEP-12/1250-31.5 

Embedded pole,or called vacuum interrupters with epoxy resin,is made by casting vacuum interrupters,main circuit conduct and mounting parts with epoxy into an integral part. The vacuum interrupters, however,should be enveloped well with a slight fold of silicon rubber jacket before that process.

Parameters of embedded pole

 

MAIN TECHNICAL SPECIFICATION

UNIT

SPECIFICATION

 

1600

1250

 

Rated voltage

kV

12

 

Rated current

A

1600

1250

 

Rated frequency

Hz

50/60

 

Short-duration(1minpower frequency withstand voltage 

kV

48

 

Lightning impulse withstand voltage

kV

95

 

Rated short-circuit breaking current

kA

31.5

 

Rated peak withstand current

kA

80

 

Rated short-circuit making current

kA

80

 

Rated short-time withstand current

kA

31.5

 

Rated duration of short-circuit

S

4

 

Rated breaking current of single capacitor bank

A

400

 

Rated breaking current of back to back capacitor bank

A

400

 

Rated operating sequence

o-0.3S-co180S-co

Breaking operations of rated short circuit breaking current

Time

30

 

Mechanical endurance

Time

20000

 

Contact self-close force

N

140±50 

 

Force required to hold contacts open at full stroke

N

220±50 

 

Circuit resistance at lower limit of rated contact force

mΩ 

≤ 25 

 

Contact limit erosion

mm

3

 

Gas pressure inside vacuum interrupter

Pa

≤ 1X10-3 

 

Partial discharge

Pc

≤ 

 

Weight of moving parts

Kg

 

Weight of vacuum interrupter embedded poles

Kg

 

 

 

Mechanical data required for the matched vacuum switchgear

 

 

MAIN TECHNICAL SPECIFICATION

UNIT

SPECIFICATION

   

1600

1250

Clearance between open contacts

mm

11±

Average opening speed

m/s

1.2±0.2 

Average closing speed

m/s

0.6±0.2 

Rated contact pressure

N

3100±200 

Contact bouncing duration at closing operation

ms

≤ 

Out of simultaneity of contact closing and opening

ms

≤ 

Bouncing back amplitude of opening contact

mm

≤ 

 

 

Information for Embedded Pole

From the development of insulations on breakers,it can be divided into three generations:air, composite and solid insulation and so-called solid insulation means epoxy embedded pole,which might represent the great advancement of insulation on vacuum breakers.Since the epoxy can be used to replace the insulating and mechanical supports,the breakers therefore become compact and simple and are able to service under humid and dusty conditions.When the external insulations of miniature chambers in air condition fail to fulfill the requests of specifications,embedded poles are therefore introduced and now become one of the most applicable ways in the field of medium voltage breakers either at home or abroad.

 

 Embedded pole for vacuum circuit breaker 12kV EEP 12/1600 31.5 EEP 12/1250 31.5

 

Drawing-embedded-pole-for-vacuum-circuit-breaker-12kV-EEP-12-1250-31.5-EEP-12-12.jpg

 

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