JY HMP-15kV/600A/200A/ Mixed Busbars

Scope of Delivery Mixed busbar body Coving cap Installation Instruction Sheet Quality Certificate

Share to:

I. Product Overview

JY HMP-15kV/600A/200A/ Mixed Busbars are multi-specification mixed busbar accessories designed specifically for 15kV (10kV level) medium-voltage power distribution systems. They are integrally injection molded from high-purity EPDM ethylene propylene diene monomer rubber, integrating 600A and 200A interfaces to achieve parallel busing of power distribution equipment bushings and multiple cable accessories of different specifications. They also provide insulation, bus connection, and grounding protection functions. They can be used with accessories such as T-type cable joints, surge arresters, and insulating caps, and are widely used in ring main units, prefabricated substations, cable branch boxes, and other equipment. They are a key component in medium-voltage power distribution systems for solving the problem of busing at interfaces with different current levels.

II. Product Characteristics

1. Electrical and insulation properties

Made of high-purity EPDM ethylene propylene diene monomer rubber through integral injection molding, it has no seams or air gaps, excellent insulation performance, can withstand the rated voltage of 15kV system and short-time overvoltage, meets the operating requirements of the maximum working voltage of 17.5kV, and has sufficient insulation margin.
With an internal electric field optimization structure and stress control layer, the electric field is evenly distributed, effectively suppressing partial discharge. There is no risk of electrical erosion or breakdown during long-term operation, and the partial discharge amount is ≤10pC (1.5U₀).
It features a built-in copper busbar with excellent conductivity and low contact resistance. The 600A interface can carry a rated current of 600A, while the 200A interface is compatible with 200A accessories. It generates little heat during long-term operation and has strong resistance to corrosion and oxidation.
It has a built-in grounding connection structure, which can achieve reliable grounding, effectively release fault current and induced voltage, and improve system safety.

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 the safety of maintenance personnel.
The integrated multi-circuit hybrid interface design can provide both 600A and 200A interfaces simultaneously, enabling parallel connection of accessories with different current ratings. It is compatible with equipment bushings and multi-channel cable accessories, requiring no additional adapters and making installation convenient.
The design prevents mis-insertion and incorrect connection. The interface size strictly matches the corresponding specification accessories and can only be matched with accessories of the corresponding level, preventing the mixing of accessories of different specifications. It has a built-in positioning and locking structure to prevent loosening and falling off after installation.
The interface layout is reasonable, the operating space is sufficient, and the accessories are easy to plug and unplug, allowing installation and maintenance to be completed without special tools.

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. It is suitable for various outdoor and indoor scenarios.
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 underground, humid, and dusty conditions, and is not afraid of rain or condensation corrosion.
It is resistant to aging, ultraviolet rays, and ozone corrosion, with a service life of over 30 years. It requires no maintenance and reduces subsequent operation and maintenance costs.

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 deformation or damage risk. Its seismic resistance level reaches level 8.
It is compatible with 15kV 600A standard equipment bushing interfaces and can be interchanged with T-type cable joints, surge arresters and insulating caps of the same specifications. It is also compatible with 200A level accessories, making it highly versatile.
The interface is standardized and conforms to IEEE 386 and relevant domestic standards. It can be adapted to the bushing interface of mainstream 15kV American power distribution equipment to meet the current collection needs of lines with different current levels.

III. Technical Parameters

Parameter categories	project	Technical indicators
Rated electrical parameters	Applicable system voltage (Un)	10kV
	Rated voltage (Ue)	15kV (maximum operating voltage 17.5kV)
	Rated frequency (fn)	50Hz/60Hz
	Power frequency withstand voltage	42kV/5min (dry test), no breakdown, no flashover
	Lightning impulse withstand voltage	95kV (peak value), no breakdown, no flashover
	Partial discharge quantity	≤10pC (below 1.5U₀)
	Rated short-circuit withstand current	20kA/2s (600A interface)
	Contact resistance	≤50μΩ (600A interface), ≤100μΩ (200A interface)
Structural and material parameters	Main material	EPDM (ethylene propylene diene monomer) rubber (insulation layer), tin-plated copper (busbars/conductive contacts)
	Protection level	IP67
	Interface Standard	One input terminal (15kV 600A American standard bushing interface), and multiple output terminals (including 600A/200A mixed interface).
	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

Applicable voltage level : 10kV AC medium voltage power distribution system, compatible with American-style equipment bushing interfaces with a maximum operating voltage of 17.5kV.
Applicable equipment scenarios :
Bushing interfaces for 15kV American-style ring main units, prefabricated substations, cable branch boxes, American-style prefabricated transformers and other power distribution equipment to achieve multi-path current convergence for accessories of different current levels;
Used in conjunction with T-type cable joints, surge arresters, and insulating caps to construct multiple cable terminals and surge arrester interfaces of different specifications;
Urban power distribution network cable lines, power distribution systems of industrial and mining enterprises, and power distribution interfaces for new energy (photovoltaic/wind power) booster stations;
Insulated conduit connections for equipment in various scenarios such as indoor/outdoor power distribution rooms, underground pipe corridors, and cable tunnels, meeting the current collection needs of lines with different current levels.
Function and Application : Enables insulated and sealed parallel bus connection of equipment bushings and multiple cable accessories with different current ratings, combining grounding protection, insulation isolation and line bus functions, providing a safe and reliable hybrid interface bus solution for power distribution systems.

V. Usage Conditions

1. Normal operating conditions

Altitude: ≤2000m;
Ambient temperature: -40℃~+90℃; equipment operating temperature complies with relevant standards.
Relative humidity: ≤100% (no condensation);
Environmental conditions: No corrosive gases, no flammable or explosive media, no severe vibration or impact;
Installation method: It is compatible with standard equipment sleeve interfaces and can be installed horizontally or vertically. The installation space must meet the requirements for the operation of multiple accessories.

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 equipment sleeve interface specifications, special interface quantity/specification combination;
Special grounding requirements and high pollution levels.

VI. Installation and Maintenance

1. Installation Requirements

Before installation, inspect the product appearance for cracks, damage, bubbles, and undamaged insulation surfaces; check that the grounding lead is intact and free of rust, and that all accessories are complete.
Clean the surface of the equipment sleeve interface to remove oil, dust, and foreign objects, ensuring the interface is dry and clean.
Apply a special silicone grease lubricant evenly to the inner wall of the input end of the hybrid busbar to avoid damaging the insulation layer during installation.
Slowly push the busbar into the equipment bushing interface to ensure it is fully in place and lock the positioning structure; connect the grounding lead to the grounding grid, with a grounding resistance ≤4Ω.
Each circuit output terminal should be connected to the corresponding accessory to ensure that the accessory is installed in place and the anti-disconnection device is locked. It is strictly forbidden to connect accessories of different current ratings to the wrong interface.
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 busbars, ensuring there are no cracks, discharge marks, or dirt accumulation, and that the grounding leads and all circuit accessories are securely connected without any looseness.
Regularly test the insulation resistance to ensure that the performance meets the requirements and to detect potential faults in a timely manner.
Clean the surface of the busbar to remove accumulated dust and dirt, keep the insulation surface dry and clean, and avoid corrosion from oil and chemicals.
If any abnormalities such as cracks, damage, discharge, or overheating occur in the busbar or its accessories, it must be stopped immediately and replaced. Operation with defects is strictly prohibited.
Special insulated tools must be used for plugging and unplugging accessories. It is strictly forbidden to operate live connectors by hand. Power distribution safety regulations must be strictly followed during operation.

VII. Precautions

The product must be installed, debugged, and maintained by professional electrical personnel with medium-voltage power distribution construction qualifications. Operation by non-professional personnel is strictly prohibited.
The product must be used with the corresponding specifications of equipment sleeves and cable accessories. It is strictly forbidden to use interfaces with different voltage levels or different current levels, otherwise it will lead to insulation failure and safety accidents.
Mixed busbars 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 install or disassemble the connectors.
Each circuit output terminal must be matched with an accessory of the corresponding current rating. It is strictly forbidden to connect a 200A accessory to a 600A interface or vice versa, otherwise it will cause overload damage or insulation failure of the equipment.
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.
When operating accessories on live circuits, it is essential to strictly adhere to power distribution safety regulations, implement appropriate safety precautions, and strictly prohibit any unauthorized operations.

VIII. Model Description

Model Identification	meaning
JY	Product series code
HMP	Hybrid busbar series code
□-15kV	Voltage level related codes, applicable to 15kV systems
600A/□	Input/partial output terminals are compatible with a 600A current rating. □ indicates the number of interfaces.
200A/□	Some output terminals are compatible with a 200A current rating; □ indicates the number of interfaces.
Mixed busbars	Hybrid busbar, multi-circuit bus accessory with interfaces for both 600A and 200A current ratings.

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 (special interface quantity/specification combination, special working condition adaptation).

Document Description

The technical parameters in this manual are based on standard operating conditions. Special operating conditions need to be customized according to actual needs. The final specifications shall be subject to the product technical agreement and type test report.