Selecting the correct insulation piercing connector types starts with identifying your voltage class. Specify 1kV IPCs for low-voltage (LV) distribution networks, and reserve 10kV models for medium-voltage (MV) grids.
A reliable way to confirm proper IPC installation is the audible “snap” of the torque-controlled shear head. It indicates that the specified tightening force has been reached, helping ensure consistent electrical contact and reducing the risk of hotspots, outages, and premature maintenance.
Voltage Class – Basic Information: 1kV (LV) vs 10kV (MV)
When it comes to utility distribution, one needs to evaluate the correct insulation piercing connector types not only in terms of conductivity but also from the perspective of dielectric stability.
These contacts utilize hardened metal blades (often exceeding 58 HRC) to reliably pierce tough insulation sleeves generally made from XLPE or PVC materials.
Moving to 10kV entails a big change in housing design to cope with higher electrical field stress. As a result, the insulation properties on MV distribution lines increase, and the connectors must have greater creepage distance and structural strength. If you upgrade your power distribution system up to 10kV, using connectors that can work only with 1kV will cause insulation failure. Always check whether your connectors meet the requirements of IEC 61238-1.
Branch-Type vs Earthing-Type IPCs
Field technicians must distinguish between standard branch units and specialized earthing models. Most installations require branch Insulation Piercing Connectors to create a permanent tap from a main feeder to a secondary circuit. These rely on calibrated torque to establish a connection that outperforms many traditional terminal block types in exposed outdoor environments by reducing labor time by up to 70%.
Conversely, earthing-type IPCs, such as the Haiyan FJ6/HYD series, are designed for temporary grounding or voltage testing. These are essential for maintenance safety protocols on energized lines where crews must verify de-energization before beginning mechanical repairs. While branch types prioritize continuous current delivery for solar arrays or community housing, earthing types are built to provide safe, repeatable contact points for protective grounding equipment.
The FJ6/HYC series branch type insulation piercing connectors are used for the connection and branching of overhead insulated conductors in medium-voltage distribution networks.
INQUIRY NOWFlame-Retardant Versions — When You Need Them
In high-risk environments like industrial plants or densely populated urban corridors, standard polycarbonate isn’t always enough. Flame-retardant versions are injection-molded from high-strength, reinforced engineering plastics that resist ignition even under extreme thermal stress. These housings are designed to withstand temperatures up to 960°C, ensuring the connection remains physically stable during a localized electrical fault.
When I specify IPCs for indoor industrial power distribution or mining operations, the flame-retardant rating is non-negotiable. It prevents the connector housing from becoming fuel for a fire if an arc occurs. Haiyan utilizes advanced in-house testing, including halogen moisture analyzers and melt flow index testers, to verify that every batch meets these strict safety requirements.
Matching Conductor Size to IPC Rating
You cannot treat IPCs like generic types of electrical terminals found in a low-current control panel. Every insulation piercing connector type supports a defined conductor size range—for instance, 16–95 mm² for the main and 1.5–10 mm² for the branch. Using a connector designed for a small cable on a much larger conductor will prevent the blades from reaching the core, while a connector that is too large will fail to seal against moisture ingress.
Material compatibility is equally vital. Aluminum conductors should use connectors with aluminum blades for cost efficiency, while copper conductors require tinned copper or brass blades. Tinned copper offers superior conductivity and resistance to galvanic corrosion. For high-humidity or coastal zones, I always lean toward gel-filled or sealant-injected models, which provide an IP68-level defense by sealing the entry point the moment the blades penetrate the jacket.
Comparison Table (Haiyan FJ6 Series)
| Model Range | Voltage Class | Connection Type | Typical Field Use |
| FJ6/HYJ & HYC | 1kV (LV) | Branch Tap | Residential Service Drops |
| FJ6/HYC10 | 10kV (MV) | Branch Tap | Utility Grid Distribution |
| FJ6/HYD | 1kV (LV) | Earthing Type | Testing & Temporary Grounding |
| FJ6/HYD10 | 10kV (MV) | Earthing Type | MV Grid Safety Maintenance |
| FJ6/TTD | 1kV (LV) | Multi-Branch | Compact Pole-Top Distribution |
| FJ6/TTDF | 1kV (LV) | Flame-Retardant | High-Density Urban Fire Safety |
Conclusion
Choosing the correct insulation piercing connector types starts with matching the connector’s voltage class to your application. Use 1kV IPCs for LV ABC and solar installations, and 10kV IPCs for medium-voltage utility networks that require greater dielectric strength and creepage distance. Selecting the right connector improves safety, minimizes maintenance, and extends service life. For dependable grid infrastructure, choose certified Haiyan Insulation Piercing Connectors backed by 25+ years of manufacturing expertise and 44+ technical patents.
FAQ
What is an insulation piercing connector?
An insulation piercing connector (IPC) is a mechanical device that creates an electrical tap by penetrating the insulation of an energized or de-energized conductor without stripping it, using calibrated steel blades and a sealed housing.
How do IPCs differ from crimp terminal types?
Unlike various crimp terminal types that require wire stripping and heavy hydraulic tools, IPCs offer 70% faster installation and superior moisture sealing for aerial conductors without de-energizing the circuit.
Can I reuse an insulation piercing connector after it has been removed?
No. Once the shear-bolt has snapped and the blades have deformed the insulation, the unit is no longer waterproof or electrically safe for a second installation; it must be discarded to prevent high-resistance failures.
