ZK-SN/TPM

Technical parameters, electrical diagram, downloads, a description of the type of MV cable connection ZK-SN/TPM-3 production ZPUE S.A.
ZK-SN Złącza kablowe SN w obudowie betonowej z rozdzielnicą w izolacji gazu SF6

Connection box in concrete enclosure with external servicing, ZK-SN type is intended for free-standing placement and adapted to work with medium voltage underground grids or underground and overhead grids, in a ring or star system.

The ZN-SN enclosure is composed of two monolithic elements main structure — constructed with C30/37 class reinforced concrete, roof — constructed with C30/37 class reinforced concrete, The central element of the connection box is a TPM type MV switchgear in SF6 insulation placed inside the enclosure, which is operated from the outside, after opening the metal doors. The foundation part of the connection box is made of concrete, with process openings for feeding the cables (placed below the MV switchgear). Heads made by all leading manufacturers (CELLPACK, Euromold, Raychem etc.) may be connected to the switchgear.

Technical parameters / configuration possibilities

Dimensions of ZK-SN connection boxes and possible MV switchgear layouts to be used
Length* [mm] 1500 1800 2400 3000 3200 3500
Width [mm] 1100 1160 / 1300 / 1500 1300 / 1500 / 1650
Height [mm]
- main structure without roof
2350 2350 / 2850 2450 / 2850
- main structure with roof
2450 2450 / 2950 2550 / 2950
- from ground surface with roof
1800 1800 / 2300 1900 / 2300
Usable area m2 1,35 1,65 2,18 - 2,93 3,16 - 4,15 3,38 - 4,44 3,72 - 4,88
Total weight [kg] 2900 3400 / 4100 5000 - 6500 6300 - 7900 6500 - 8300 7000 - 8800
Total weight of main structure with devices [kg] 2400 2800 / 3500 4150 - 5400 5100 - 6400 5250 - 6750 5650 - 7100
Roof weight [kg] 500 600 850 - 1100 1200 - 1500 1250 - 1550 1350 - 1700
MV switchgear***, maximum number of line bays
- system without TPW 3 4 5 7 8 9
- system with TPW - 3 4 5 6 7
Parameters of the ZK-SN** connection box (as maximum values)
Power of the auxiliary transformer (TPW) 2,5 kVA (higher power — on arrangement with the manufacturer)
Rated frequency 50 / 60 Hz
Ingress protection rating IP 43
Enclosure mechanical impact resistance IK10 (20J)
Internal arc resistance classification IAC-AB-20 kA-1s
Rated short-time withstand current / peak earthing circuits current 20 kA (1s) / 50 kA
Parameters of the SN switchgear** (as maximum values)
Rated voltage 24 (25) kV
Network frequency withstand voltage (1 min) 50/60 kV
Withstand lightning surge voltage (1.2/50 μs) 125/145 kV
Busbar rated continuous withstand current 630 A
Continuous rated current for bays with switch disconnectors and circuit breakers 630 A
Continuous rated current for bays with fuse switch disconnectors 250 A
Rated short-time withstand current 20 kA (1s)
Rated peak withstand current 50 kA

Note!

* The dimensions concern the main structure of the connection box, the outline of the roof is larger than the outline of the structure by 100 mm on each side.

** Technical parameters are specified as maximum, they will depend on the connection box configuration and used equipment.

*** Detailed selection of switchgears and their equipment is listed in chapters dedicated to individual devices in the catalogue.

Placement of equipment - options without TPW**

Złącze kablowe ZK-SN - wariant bez TPW
1 Walls, 60 mm thick — length 1500 and 1800 mm
Walls, 90 mm thick — length 2400, 3000, 3200 and 3500 mm
2 Doors: solid or with ventilation louvres, without fire integrity class IP 23D - standard
3 MV switchgear
ZK-SN (1,5x1,1)/3
ZK-SN (1,5x1,1)/3
MV switchgear, TPM type, LLL layout
MV switchgear, TPM type, LLL layout
ZK-SN (1,8x1,1)/4
ZK-SN (1,8x1,1)/4
MV switchgear, TPM type, LLLL layout
MV switchgear, TPM type, LLLL layout
ZK-SN (2,4x1,16)/5
ZK-SN (2,4x1,16)/5
MV switchgear, TPM type, LLLLL layout
MV switchgear, TPM type, LLLLL layout

Note!

Optional equipment was marked with red on the electrical diagram.

The catalogue presents example connection box and MV switchgear configurations.

* Detailed selection of MV switchgears and their equipment is listed in chapters dedicated to individual devices in the catalogue.

** TPW — auxiliary transformer used to supply the remote control and monitoring systems.

Placement of equipment — example solutions for options with TPW**

ZK-SN connection boxes do not serve only distribution purposes in a power grid. Equipped with modern, compact MV switchgears with remote monitoring and control systems, current and voltage sensors and connected short-circuit indicators, they enable cutting off damaged sections of the grid and shortening the time of power supply interruptions for the customers. This undoubtedly has a direct impact on the quality of services provided by distribution companies, which translates directly into user satisfaction.
In order to enable such functionality, the connection boxes have to be equipped with auxiliary systems supplied from an independent auxiliary transformer, supplied in turn by the MV switchgear. This solution is dedicated to Smart Grid systems, and fits perfectly in the market trends of power grid development and modernisation.

Złącze kablowe ZK-SN - wariant z TPW
1 Walls, 60 mm thick — length 1500 and 1800 mm
Walls, 90 mm thick — length 2400, 3000, 3200 and 3500 mm
2 Doors: solid or with ventilation louvres, without fire integrity class IP 43 - standard
3 MV switchgear
4 TPW - auxiliary transformer cabinet
5 AMI cabinet / Smart Grid / telemetry / auxiliary
6 Gas cooler
7 Smart Grid antennas mast for GSM/TETRA system
ZK-SN (1,8x1,1)/3-tpw
ZK-SN (1,8x1,1)/3-tpw
Rozdzielnica SN typu TPM układ LLL
ZK-SN (2,4x1,16)/4-tpw
ZK-SN (2,4x1,16)/4-tpw
Rozdzielnica SN typu TPM układ WLLL
ZK-SN (3x1,3)/5-tpw
ZK-SN (3x1,3)/5-tpw
ZK-SN (3x1,3)/7 (version with TPW)
ZK-SN (3x1,3)/7 (Wariant bez TPW)
Rozdzielnica SN typu TPM układ TLLLL
ZK-SN (3,2*x1,5)/6-tpw
ZK-SN (3,2*x1,5)/6-tpw
ZK-SN (3,2*x1,5)/8 (version without TPW)
ZK-SN (3,2*x1,5)/8 (Wariant bez TPW)
Rozdzielnica SN typu TPM układ WLLLLL
ZK-SN (3,5*x1,65)/7-tpw
ZK-SN (3,5*x1,65)/7-tpw
ZK-SN (3,5*x1,65)/9
ZK-SN (3,5*x1,65)/9
Rozdzielnica SN typu TPM układ LLLLLLL

Note!

Optional equipment was marked with red on the electrical diagram.

The catalogue presents example connection box and MV switchgear configurations.

* Detailed selection of MV switchgears and their equipment is listed in chapters dedicated to individual devices in the catalogue. The possibility of installing other types and configurations of switchgears should be arranged every time with the connection box manufacturer.

** TPW — auxiliary transformer used to supply the remote control and monitoring systems. TPW cabinet in arc-protection design.

*** RPW — auxiliary switchgear.

**** Due to the installation of TPW, auxiliary power supply, telemetry cabinets, short-circuit indicators etc., the height of Smart Grid adapted connection boxes is higher than standard, and amounts to 2850 mm.

Option with voltage measurement and TPW

The main element of the connector equipment in the variant with measurement and TPW is MV switchgear in SF6 insulation, TPM type, with a built-in measuring field and a metering system (independent access from the outside). Such a solution offers new possibilities for the configuration of the MV network, as well as the construction of subscriber stations, to which free access may be difficult or even impossible (plot ownership, only remote monitoring of facilities or strategic facilities). It enables distribution and settlement companies to have full control over the measurement system, increasing the quality of their services and user satisfaction.

Złącze kablowe ZK-SN - wariant z pomiarem i TPW
1 Walls, 90 mm thick - standard
2a MV switchgear compartment doors, solid or with ventilation louvres, without fire integrity class IP 43 - standard
2b Metering panel doors, solid without fire integrity class IP 43 - standard
3 MV switchgear
4 TPW - auxiliary transformer cabinet
5 AMI cabinet / Smart Grid / telemetry / auxiliary
6 Gas blow-out system
7 Metering panel
Placement of equipment - ZK-SN (3,0x1,5)/4-tpw_p example solutions
ZK-SN (3,0x1,5)/4-tpw_p
Height of the main structure [mm] 2850
Usable area [m2] 3,72
Total weight with roof [kg] 6500
Electric diagram
Rozdzielnica SN typu TPM układ LL+M+T

MV cable connection in concrete container with SF6 gas insulated switchgear

Our site uses cookies. By using it, you agree to their use and data processing. Additional information