HV-CONNEX Separable Connector System for High Voltage Networks

HV-CONNEX 72.5 kV – 245 kV

The advantages of the CONNEX system come to the fore in particular in the area of high-voltage systems: simple on-site installation and factory-tested components save moneyand provide additional safety. Plug-in HV-CONNEX systems make costly oil and gas work during the installation and commissioning of transformers and SF₆ gas-insulated switchgear (GIS) a thing of the past. Thanks to their plug-in connectors, cable joints from the HV-CONNEX range are much more flexible than traditional solutions when it comes to building and converting electrical systems. Needless to say, the range includes all the connection components needed to test the system and the attached equipment.

Test standard: TNT 10.97		CONNEX cable connector system Size
		4	5-S	6	6-S
Current rating	IN (A)	2500	2500	2500	2500
Max. working voltage	Um (kV)	72,5	145	170	245
AC voltage test	50 Hz/1 min (kV)	140	275	325	460
Nominal withstand lightning impulse voltage	1,2/50 μs (kV)	325	650	750	1050
Partial discharge	2 x Uo (pC)	≤ 2	≤ 2	≤ 2	≤ 2
DC voltage test	15 min 6 x Uo (kV)	144	304	348	508
Rated short-time withstand current	0,5 sec (kA)	63	63	63	63
Rated short-time withstand current	1 sec (kA)	50	50	50	50
Nominal impulse current	(kA)	160	160	160	160

Advantages


	approx. 50 % shorter mounting length compared with conventional systems in accordance with IEC60859 and IEC62271-209
	no opening of the cable termination and associated costly gas or oil work
	horizontal, vertical and angled versions for connection to GIS and transformers
	considerably reduced installation times
	the use of pre-assembled and tested components means maximum safety and efficiency
	installation errors are minimised
	if a fault does arise, rapid separation of cable and equipment

A Bushing

	female contact part

	insulating bushing

	Housing

B	Contact system

	contact ring

	tension cone

	thrust piece

C	Insulating and field-control part

D	Housing

	pressure sleeve
	pressure spring
	bell flange
	gasket
	threaded counter ring
	heat-shrink
	cable screen

GIS Equipment

HV-CONNEX bushings require less space than conventional type connectors. All well-known manufacturers have since begun to offer equipment which exploits this advantage. An extension adapter for conventional cable connector modules is required when HV- CONNEX is used with traditional GIS equipment.

Transformers

The installation of two connectors on the equipment makes it possible to have one cable connector on the side, facing down. If it is necessary to connect this kind of transformer using an overhead line, an HV-CONNEX plug-in insulator for overhead lines can be installed and the downward facing cable connector then terminated with a dummy connector. This plug-in insulator also makes it very easy to carry out simple voltage tests on transformers fitted with HV-CONNEX equipment connectors, either in the factory or on site.

Plug-in Joint Boxes

The HV-CONNEX cable connection system means plug-in joint boxes for various geometric configurations can be assembled using fewer components. The advantage of these joint boxes is that the joint body is a single unit which is completely manufactured and tested at the factory. Solutions of this kind bring enormous benefits if, for example, cables need to be bent back multiple times during the installation and conversion phase.

CONNEX 170 kV Plug-in Bushing

The HV plug-in bushing can be used wherever high-voltage equipment needs to be connected to overhead lines. A CONNEX plug-in bushing provides the connection to the equipment. If the plug-in bushing is used, the high-voltage equipment can be operated immediately without having to open and test it again at the installation site. In addition, plug-in HV versions can be installed at any angle. And the bushing can, of course, be swapped for a cable connector at any time.

The conventional alternative: IXOSIL ESG and IXOSIL ESU

IXOSIL ESG and IXOSIL ESU also provide conventional terminations in accordance with IEC ESG: IEC60840, IEC60859, IEC62271 and ESU: IEC60840, EN 50299 for the direct introduction of XLPE insulated high voltage cables in oil- or gas insulated equipment. For IXOSIL ESU we offer customized adapters. Both types are available in vertical, horizontal or overhead versions from 72.5 kV to 170 kV.

The conventional alternative:
IXOSIL ESG and IXOSIL ESU


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