JY ZT-15/200 15kV 200A Loadbreak Elbow Connector

I. Product Overview

The 15kV 200A loadbreak elbow connector is a detachable cable termination designed specifically for 15kV (10kV level) medium-voltage cable systems. It features a fully insulated, fully sealed, and touch-accessible structure with load breaking capability. It is a core component for ring main units, prefabricated substations, cable branch boxes, and other equipment, widely used in urban and industrial power distribution systems. It ensures safe and reliable connections between cables and equipment, supports live plugging and unplugging and load switching operations, significantly improving the ease of operation and maintenance and safety of power distribution systems.

II. Product Characteristics

1. Insulation and electrical properties

• Made of EPDM ethylene propylene diene monomer rubber through integral injection molding, it has no seams or air gaps, excellent insulation performance, and can withstand the rated voltage of 15kV system and short-time overvoltage, with sufficient insulation margin.
• With a built-in capacitor voltage divider structure, it can realize the live display function, intuitively monitor the live status, and eliminate the risk of misoperation.
• It has load breaking capability and can perform live plugging and unplugging operations under rated current, meeting the needs of power distribution system for uninterrupted maintenance and switching.
• The electric field is optimized and the internal stress control layer uniformly distributes the electric field to avoid partial discharge, ensuring no risk of electrolytic corrosion or breakdown during long-term operation.

2. Structural and Safety Features

• With a fully insulated, fully sealed, and touch-accessible structure, the outer layer has high insulation strength, allowing direct contact with the outer casing during operation without the risk of electric shock, thus ensuring safe operation and maintenance.
• The elbow-type integrated design integrates the conductive rod, insulation layer, stress control layer, and grounding terminal, resulting in a compact structure, convenient installation, and compatibility with standard American/European cable interfaces.
• It has a built-in grounding lead, which can achieve reliable grounding, effectively release fault current and induced voltage, and improve system safety.
• The design prevents mis-insertion and mis-uninsertion, and the interface size is standardized, ensuring compatibility only with corresponding equipment/cable terminals, thus eliminating the risk of incorrect connection.

3. Environmental and Weather Resistance

• It has excellent weather resistance and can adapt to a wide temperature range of -40℃ to +90℃. The elasticity and insulation properties of the rubber do not decrease under high and low temperatures, and there is no risk of cracking or embrittlement.
• Moisture-proof, waterproof, stain-proof, and salt spray-proof, with an IP67 protection rating, it can operate stably for a long time in harsh environments such as indoors/outdoors, underground, and humid conditions.
• It is anti-aging, anti-ultraviolet, and resistant to ozone corrosion, with a service life of over 30 years and requires no maintenance.

4. Mechanical and Adaptation Characteristics

• It has high mechanical strength, is impact and vibration resistant, and can withstand mechanical stress during transportation, installation and operation without the risk of deformation or breakage.
• It is compatible with 15kV 200A grade copper/aluminum core cables and various cable cross-sections (16~240mm², customizable), making it highly versatile.
• The interface is standardized and conforms to ANSI/IEEE standards, making it interchangeable with elbow joints, bushings, and load switches of the same specifications, with strong compatibility.

III. Technical Parameters

Parameter categories	project	Technical indicators
Rated electrical parameters	Rated voltage (Ue)	15kV (Applicable to 10kV systems, maximum operating voltage 17.5kV)
	Rated current (Ie)	200A
	Rated frequency (fn)	50Hz/60Hz
	Power frequency withstand voltage	42kV/5min (dry test), 38kV/5min (wet test), no breakdown, no flashover.
	Lightning impulse withstand voltage	95kV (peak value), no breakdown, no flashover
	Partial discharge quantity	≤10pC (under 1.5U0)
	Rated load breaking current	200A (can be repeatedly interrupted ≥100 times)
	Rated short-circuit withstand current	16kA/2s (20kA/2s optional, depending on cable specifications)
	Contact resistance	≤100μΩ
Structural and material parameters	Main material	EPDM (ethylene propylene diene monomer) rubber (insulating layer), copper-plated tin (conductive rod)
	Protection level	IP67
	Compatible cable cross-section	16~240mm² (copper/aluminum core cross-linked polyethylene insulated cable, customizable)
	Interface Standard	American standard interface (compatible with European interfaces of the same specification)
	grounding method	It comes with a grounding lead and can be directly grounded.
Environmental parameters	Applicable altitude	≤2000m (Customization available for high altitudes)
	Ambient temperature	-40℃/ +90℃ (operating temperature), -40℃/ +70℃ (storage temperature)
	relative humidity	≤100% (no condensation)
	Seismic resistance level	Level 8
Implementation Standards		IEEE 386, GB/T 12706, DL/T 404, GB/T 11022

IV. Scope of Application

1. Applicable voltage levels : 10kV~15kV AC medium voltage power distribution systems, compatible with cable lines with a maximum operating voltage of 17.5kV.
2. Applicable equipment scenarios :
3. Cable inlet and outlet connections for power distribution equipment such as ring main units, prefabricated substations, cable branch boxes, and American-style prefabricated substations;
4. Urban power distribution network cable lines, power distribution systems of industrial and mining enterprises, and cable connections for new energy (photovoltaic/wind power) booster stations;
5. Cable terminals for various scenarios including indoor/outdoor power distribution rooms, underground utility tunnels, and cable tunnels;
6. For power distribution circuits that require frequent switching and maintenance, uninterrupted plugging and unplugging operations are supported.
7. Functions and applications : To achieve insulation, sealing, and detachable connection between cables and power distribution equipment, while also providing load interruption, live display, and grounding protection functions, thereby improving the flexibility and safety of the power distribution system.

V. Usage Conditions

1. Normal operating conditions

• Altitude: ≤2000m;
• Ambient temperature: -40℃ to +90℃; maximum operating temperature of cable conductor: ≤90℃.
• Relative humidity: ≤100% (no condensation);
• Environmental conditions: No corrosive gases, no flammable or explosive media, no severe vibration or impact;
• Installation method: horizontal/vertical installation, compatible with standard cable conduit interfaces, installation space must meet the requirements for plugging and unplugging operations.

2. Special usage conditions (customization required)

• The altitude exceeds 2000m;
• The ambient temperature exceeds the range of -40℃ to +90℃;
• Severely polluted, salt spray, and chemically corrosive environments;
• High vibration and high impact conditions;
• Non-standard cable cross-sections and non-standard interface specifications;
• Scenarios requiring frequent high-current interruption and special grounding requirements.

VI. Installation and Maintenance

1. Installation Requirements

• Before installation, inspect the product appearance for cracks, damage, bubbles, and undamaged insulation surfaces; check that the conductive rod and grounding lead are intact and free of rust.
• In accordance with the cable terminal installation process, complete the procedures such as cable stripping, stress tube installation, and conductor crimping to ensure that the cable terminal dimensions meet the joint compatibility requirements.
• Before installing the connector, apply silicone grease evenly to the inner wall of the insulation layer to avoid damaging the insulation layer during installation.
• Slowly push the connector into the equipment sleeve interface to ensure it is fully in place, lock the anti-disengagement device, and connect the grounding lead to the grounding grid. The grounding resistance should be ≤4Ω.
• After installation, insulation resistance and power frequency withstand voltage tests are conducted. Only after passing these tests can the equipment be put into operation.

2. Maintenance Requirements

• Regularly inspect the appearance of the connectors, ensuring there are no cracks, discharge marks, or dirt accumulation, and that the grounding lead is securely connected without any looseness.
• Regularly test insulation resistance and contact resistance to ensure performance meets requirements.
• Clean the surface of the connector to remove dust and dirt, and keep the insulation surface dry and clean to avoid corrosion from oil and chemicals.
• If any abnormalities such as cracks, damage, discharge, or overheating occur in the connector, it must be stopped immediately and replaced. Operation with defects is strictly prohibited.
• Special insulated tools must be used for plugging and unplugging operations. It is strictly forbidden to operate live connectors with bare hands. Power distribution safety regulations must be strictly followed during operation.

VII. Precautions

1. The product must be installed, debugged, and maintained by professional electrical personnel with medium-voltage cable construction qualifications. Operation by non-professional personnel is strictly prohibited.
2. Live plugging and unplugging operations must be performed within the rated current range. Overcurrent and overvoltage interruption are strictly prohibited. A dedicated insulated operating rod must be used during operation, and proper safety precautions must be taken.
3. The connector must not be disassembled or modified without authorization, otherwise the warranty and safety guarantee will be lost. It is strictly forbidden to use non-special tools to forcibly insert or remove the connector.
4. When storing, it should be placed in a dry, ventilated, and cool environment, avoiding direct sunlight, high temperature, humidity, and compression. It is strictly forbidden to contact with sharp objects that may damage the insulation layer.
5. The product must be used with cable terminals and conduits of the corresponding specifications. It is strictly forbidden to use the wrong specifications of the interface, otherwise it will lead to insulation failure and safety accidents.

VIII. Model Description

Model Identification	meaning
15kV	Rated voltage rating, maximum operating voltage 17.5kV
200A	Rated current rating, rated load breaking current 200A
Loadbreak Elbow Connector	Load-breaking elbow cable joint with live plugging/unplugging capability

IX. Implementation Standards and Certification

• International Standard: IEEE 386 “Medium Voltage Detachable Cable Connector Standard”;
• National standards: GB/T 12706 “Extruded insulated power cables and accessories with rated voltage of 1kV (Um=1.2kV) to 35kV (Um=40.5kV)”, GB/T 11022 “Common technical requirements for high voltage switchgear and controlgear standards”, DL/T 404 “3.6kV~40.5kV AC metal-enclosed switchgear and controlgear”;
• The product has passed the type test of the National High Voltage Electrical Apparatus Quality Supervision and Inspection Center and meets national electrical safety standards.

X. After-sales service

• Product warranty period: 18 months from the date of manufacture, or 12 months from the date of commissioning (whichever comes first).
• During the warranty period, products will be repaired or replaced free of charge if quality issues arise.
• We provide technical support, installation guidance, and customized services (adaptation to special specifications and working conditions).

Appendix: Product outline diagram