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The 35kV 630A IEC type rear connector belongs to plug type separable connector accessories, which are designed to extend cable connection circuits and form branch circuits when paired with IEC type tee connectors. The tail end of the connector supports two configuration options: it can be fitted directly with an insulating plug, or extended to connect with a rear connector from another circuit or a rear connector with surge arrester.
Separable connector products include elbow, straight and tee connector kits, which are applied in switchgears, transformers, cabinets and other electrical equipment. This IEC type rear connector is manufactured with an integrated field control structure, and produced via triple-layer injection technique consisting of a conductive inner layer, an insulation layer and a conductive outer layer. This production method supports consistent interface performance, reduces gaps between layers, and minimizes partial discharge during operation. The full product line covers both IEC type and IEEE type separable connectors to fit different system configurations.
This product is designed and tested in accordance with widely recognized industry standards, including:
EN 50181 Plug-in type bushings above 1kV up to 52kV and from 250A to 2.5kA for equipment other than liquid filled transformers
EN 50180 Bushings above 1kV up to 36kV and from 250A to 3.15kA for liquid filled transformers
HD629.1 Test requirements on accessories for used on power cables of rated voltage from 3.6/6(7.2)kV up to 20.8/36(42)kV-Part 1: cables with extruded insulation
IEC 60502.4 Power cable with extruded insulation and their accessories for rated voltages from 1kV(U=1.2kV) up to 30kV(U=36kV)-part 4: test requirements on accessories for cable with rated voltages from 6kV up to 30kV(U=36kV)
IEC 60099 Metal oxide surge arresters without gaps for a.c. systems
JB/T 8952 Polymer-housed metal oxide surge arresters without gaps for a.c. systems
IEEE 386 Separable insulated connector system for power distribution system above 600V
GB11032 Metal oxide surge arresters without gaps for a.c. system
Items | 8.7/10kV, 8.7/15kV | 12/20kV | 26/35kV |
AC power frequency withstand voltage | 39kV/5min | 54kV/5min | 117kV/5min |
DC withstand voltage | 35kV/15min | 48kV/15min | 104kV/15min |
Impulse withstand voltage | 95kv | 125kv | 200kv |
Partial discharge | ≤ 10PC | ≤ 10PC | ≤ 10PC |
Items | 250A | 630A |
Thermal stability current | 16kA 1s | 30kA 2s |
Dynamic stable current | 40kA | 105kA |
Item | parameter | Note |
Rated voltage | 35kV | The product meets the requirements of IEC60502.4、 GB/T12706.4. |
Applicable type of bushing | E type | |
Power frequency withstand voltage (AC) | 117 kV / 5 min, No flashover, no puncture | |
Partial discharge | 45kV, ≤ 10 pC | |
Impulse voltage(Positive & Negative each 10 times) | 200kV,No flashover, no puncture | |
Shielding resistance | ≤ 5000 Ω | |
Applicable cross-section of cable | 50-400mm2 |
The connector body is made of EPDM rubber, which comes with tear resistance, ozone resistance, oxidation resistance, corrosion resistance and high mechanical strength. The product adopts triple-layer injection molding technology, which maintains consistent interface performance, eliminates gaps between material layers, and reduces partial discharge during operation.
The connector is designed with optimized inner and outer shielding structures to improve electric field distribution. The uniform external shielding layer delivers a grounding resistance of less than 5000 Ω, which maintains zero potential on the outer surface of the cable head during operation and supports safe operation for on-site personnel and equipment.
The stress body of the connector adopts a non-slip design, which reduces the risk of misplacement during installation. The product has thermal stability and thermodynamic properties, along with sealing performance that supports operation under water.
This 35kV 630A IEC type rear connector is suitable for use in switchgears, transformers, electrical cabinets and other power equipment in industrial applications. It works as a core component in separable connector systems to extend cable circuits and establish branch connections for commercial power infrastructure.
Available matching solutions for this connector include 630A feed-thru apparatus bushing, apparatus bushing with skirt, tee connector, rear connector with surge arrester, double type apparatus bushing, single-pass apparatus bushing, insulated cap, apparatus bushing in SF6, elbow connector, 250A apparatus bushing and straight connector, to accommodate different wiring and functional requirements.
This 35kV 630A IEC type rear connector is compatible with E type bushings, matching the interface standard of IEC type plug-in systems.
This rear connector is applicable for cables with a cross-section ranging from 50mm2 to 400mm2, covering common cable specifications for 35kV power distribution systems.
Yes, this rear connector can be extended to connect with a rear connector with surge arrester, to add overvoltage protection functions to the cable circuit.
