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GPR-24(12)kV Series Ring Main Unit Switchgear

Short Description:

GPR-24 series Ring Main Unit is an extensible, SF6 insulated switchgear, with rated voltage of 12&24 kV. All its HV live parts are contained in an air-tight gas tank, which is made from stainless steel of 3mm.


Product Detail

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Summary

GPR-24 series Ring Main Unit is an extensible, SF6 insulated switchgear, with rated voltage of 12&24 kV. All its HV live parts are contained in an air-tight gas tank, which is made from stainless steel of 3mm. The whole switching assembly is SF6 insulated, and free from any external influence, ensuring it great reliability of service and maintenance free. By plug-in type busbar extension, GPR-24 series Ring Main Unit can be of free combination and full modularization. The busbar extension has passed type test for power and thermal stability, and is fully insulated and shielded, exhibiting high reliability and safety. GPR-24 series Ring Main unit is suitable for all MV network up to 24 kV, all compact power stations, power distribution substations in all important industries, such as petrol-chemical industry, metallurgical and mining industries, and all transformer substations and wind power system.

Features

1. Advanced process technique for gas tank
The digital-controlled laser cutting and punching system and three-dimension and five-axis laser welding system imported from Germany with ensure the gas tightness and uniformity of all gas tanks.
The fully automatic and integral helium leak detection system, made by SEILER Vakuumtechnik GmbH, through detecting of Helium leakage by mass spectrograph, brings gas leakage rate per year down to less than 0.02%, ensuring the life span of gas tank of over 30 years.
Advanced process technique for parts .
All epoxy resin insulated parts, including insulated poles, are manufactured by fully-automatic and digitally controlled epoxy resin vacuum mixing/pressure gelatinizing system from Hedrich (Germany) .
The busbar connector, cable connector, end-plug and other silicone rubber insulated parts are manufactured by fully-automatic and digitally controlled silicone rubber mixing/pressure gelatinizing system from VOGEL(Switzerland).
2. Excellent solutions for products
With small and compact structure, the basic functional units K, T, V, B and C have uniform dimension: 350*800*1380 mm (width*depth*height) .
Complete solutions:
Single version: load break switch unit, switch-fuse unit, vacuum circuit breaker unit, busbar subsection unit, cable unit, metering unit, etc.
Block version can be made up of two, three, four, five or six functional units.
Single units and block version can be connected by busbar connectors flexibly.
3. Strong adaptability to the environment
The primary conductive system is fully sealed in the SF6 gas tank and will not be influenced by the outside environment, independent of the impact of dew, dust, salt fog, etc. Therefore, GPR-24 series can be applied at various severe service conditions.

12kV Technical Data

Description

Unit

LBS unit

Switch-fuse unit

VCB unit

Busbar subsection unit

Rated voltage

kV

12

12

12

12

Power frequency withstand voltage (1min)

Phase to phase/earth

kV

42

42

42

42

Across the isolating distance

kV

48

48

48

48

Impulse withstand voltage

Phase to phase/earth

kV

75, (95)*

75, (95)*

75, (95)*

75, (95)*

Across the isolating distance

kV

85, (110)*

85, (110)*

85, (110)*

85, (110)*

Rated frequency

Hz

50,60

50,60

50,60

50,60

Rated current

A

630

630

630

Rated short circuit breaking current

kA

20,(25)*

Rated short time withstand current

kA/s

20/3,

(20/4, 25/1)*

20/3,

(20/4, 25/3)*

20/3,

(20/4, 25/1)*

Rated peak withstand current

kA

50, (63)*

50, (63)*

50, (63)*

Rated short circuit making current

kA

50, (63)*

50, (63)*

50, (63)*

Rated transfer current

A

1800

Rated active load breaking current

A

630

630

Rated closed loop breaking current

A

630

630

5% rated active load breaking current

A

31.5

31.5

Rated operating sequence

O-0.3s-CO-180s-CO

Mechanical lifetime

Ops.

5000

5000

10000

5000

Electrical lifetime

E3

E2

E3

Thickness of stainless steel

mm

3.0

Rated SF6 pressure

kPa

30  (at 20℃, 101.3kPa)

Annual leakage rate

 

<0.02%

Water treatment test

 

12kV  24 hours (at 30 kPa under the water)

Internal arc test

 

20kA  1s

Protection degree

Gas tank

 

IP 67

Fuse holder

 

IP 67

GPR enclosure

IP 4X

24kV Technical Data

Description

Unit

LBS unit

Switch-fuse unit

VCB unit

Busbar subsection unit

Rated voltage

kV

24

24

24

24

Power frequency withstand voltage (1min)

Phase to phase/earth

kV

50, (65)*

50, (65)*

50, (65)*

50, (65)*

Across the isolating distance

kV

64, (79)*

64, (79)*

64, (79)*

64, (79)*

Impulse withstand voltage

Phase to phase/earth

kV

95, (125)*

95, (125)*

95, (125)*

95, (125)*

Across the isolating distance

kV

110, (145)*

110, (145)*

110, (145)*

110, (145)*

Rated frequency

Hz

50, 60

50, 60

50, 60

50, 60

Rated current

A

630

630

630

Rated short circuit breaking current

kA

20

Rated short time withstand current

kA/s

20/3, (20/4)*

20/3, (20/4)*

20/3, (20/4)*

Rated peak withstand current

kA

50

50

50

Rated short circuit making current

kA

50

50

50

Rated transfer current

A

1400

Rated active load breaking current

A

630

630

Rated closed loop breaking current

A

630

630

5% rated active load breaking current

A

31.5

31.5

Rated operating sequence

O-0.3s-CO-180s-CO

Mechanical lifetime

Ops.

5000

5000

10000

5000

Electrical lifetime

E3

E2

E3

Thickness of stainless steel

mm

3.0

Rated SF6 pressure

kPa

30  (at 20℃, 101.3kPa)

Annual leakage rate

<0.02%

Water treatment test

24kV  24 hours (at 30 kPa under water)

Internal arc test

20kA  1s

Protection degree

Gas tank

IP 67

Fuse holder

IP 67

GPR enclosure

IP 4X

Notes:
① Rated current of switch-fuse unit depends on the rating of fuse: ≤100A
② Rated short circuit breaking/making current of switch-fuse unit depends on the rating of fuse
* Values in brackets are for special requirements, please contact manufacturer or supplier for more information

GPR24 Series Overview

1. Single tank type

No.

Type

Name

Primary

Diagram

Dimension W*D*H(mm)/Weight(kg)

Description

12kV

24kV

1

GPR24-K

Load break switch panel

 i1

350 x 800 x 1380

/160

350 x 800 x 1380

/160

(370 x 850 x 1380

/190)*

For switching connection between in/out cable and busbar earthed, with short circuit making capacity.

2

GPR24-T

Switch-fuse panel

 i2

350 x 800 x 1380

/190

350 x 800 x 1380

/190

(480 x 850 x 1380

/230)*

For control and protection for transformer up to 1250kVA

3

GPR24-V1

Vacuum circuit breaker panel

 i3

350 x 800 x 1380

/200

350 x 800 x 1380

/200

(480 x 850 x 1380

/240)*

For incoming/outgoing circuit, can be equipped with microcomputer protection unit

4

GPR24-V2

Vacuum circuit breaker panel

 i4

350 x 800 x 1380

/200

350 x 800 x 1380

/200

(480 x 850 x 1380

/240)*

For incoming/outgoing circuit, can be equipped with microcomputer protection unit

5

GPR24-B

Busbar subsection panel

 i5

350 x 800 x 1380

(On right side of block type, width: 400mm)

/135

350 x 800 x 1380

/135

(480 x 850 x 1380

/150)*

For busbar connection.

6

GPR24-V

Busbar coupling VCB

 i6

350 x 800 x 1380

/180

350 x 800 x 1380

/180

(480 x 850 x 1380

/220)*

For busbar connection, used in block type only

7

GPR24-C

Rising panel

 i7

350 x 800 x 1380

/100

350 x 800 x 1380

/100

(370 x 850 x 1380

/110)*

For in/out cable connection

8

GPR24-M

Metering panel

 i8

600 x 800 x 1380

/210

800 x 1000 x 1380

/210

(800 x 1000 x 1380

/220)*

For metering power/energy consumption

9

GPR24-PT

PT panel

 i9

600 x 800 x 1380/180

800 x 1000 x 1380/180

(800 x 1000 x 1380/210)*

For monitoring voltage of busbar, providing lost voltage signal

10

GPR24-P

Power supply panel

 i10

600 x 800 x 1380/170

600 x 800 x 1380/170

(600 x 850 x 1380/180)*

For providing DC 24V/48V, AC220V supply

Note:
1. Values in brackets marked with”*” are the products at 24kV, power frequency withstand voltage of 65/79kV;
2. If there are too many secondary components in the configuration, an additional compartment for them can be installed on top of the panel, its height is 400mm.

2. GPR24 Block type-1 for 12kV &24kV(power frequency withstand voltage: 50/64kV)

No.

Type

Unit combination

Primary diagram

Dimensions WxDxH(mm)

Weight (kg)

1

GPR24-KKVV

2 load breaker switch units and 2 vacuum circuit breaker unit

 img1

1050 x 800 x 1380

50

2

GPR24-KKTT

2 load breaker switch units and 2 switch-fuse unit

 img2

1400 x 800 x 1380

700

3

GPR24-5K

5 load breaker switch units

 img3

1750 x 800 x 1380

800

4

GPR24-KKKTT

3 load break switch units and 2 switch-fuse units

 img5

1750 x 800 x 1380

860

5

GPR24-KKTTT

2 load break switch units and 3 switch-fuse units

 img4

1750x800x1380

890

Notes:
If there are too many secondary components in the configuration, an additional compartment for them can be installed on top of the GPR, its height is 400mm


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