LT-T15 B+C T1+T2 Surge Protector 12.5kA Main Distribution
A combined SPD of class B+C is created for service entrances. It combines lightning impulse current handling capacity along with nominal discharge current capabilities. Established in China, Leitai Electric fabricates surge protective devices in its own factory, offering support in OEM, wholesale and distribution programs around the world.
Applications & circuit protection
The LT-T15 B+C is used for the installation of type 1+2 combined surge and lightning protection devices for the main distribution board in buildings with lightning protection systems.
- Main distribution: T1+T2 protection meets the requirements for service entrance.
- LPS buildings: Buildings with LPS.
- Commercial buildings: Class B+C provides protection in commercial buildings.
- Industrial sites: Incoming power supply.
Schematic Diagram
The schematic above shows the internal protection circuit diagram and methods of connection for the LT-T15 B+C surge protector.
Construction & operating reliability
Combining high-power MOV components with a thermal disconnector, the LT-T15 B+C provides reliable clamping performance and longevity. The factory offers MOV selection, fabrication, thermal bonding, and impulse testing under one roof.
- High-power MOV for fast reaction.
- Thermal disconnector with a visual failure indicator.
- IP20 body made from fireproof UL94 V0 material.
- Compliant with IEC 61143-11 / GB/T 18802.11 standard.
T1+T2 Surge Protector Specifications & Technical Data
| Technical Data | Value |
|---|---|
| Uc | 275V |
| Un | 220V |
| Iimp | 6.25kA |
| Uoc | 20kV |
| Up | 1.25kV |
T1+T2 Surge Protector for Sale: Factory Pricing & Sales Support
The pricing of SPDs is dependent on the category, voltage rating, discharge type and quantity. A quote would be provided for the LT-T15 B+C based on our factory price list and volume pricing available for distributors, OEM clients, and project customers.
- Factory Pricing List
- Custom Configuration and Volume Pricing on Orders
- Written Quotes Based on Your Specifications
T1+T2 Surge Protector Wiring, Installation & Connection Guide
The LT-T15 B+C SPD is connected in parallel to the protected circuit and is earthed through the PE terminal. Use short leads to minimize residual voltage. In a TN arrangement, connect L, N, and PE terminals according to the wiring diagram provided.
- Parallel connection with short leads to PE terminal
- Disconnection device recommended as per specification
- Wiring diagram included in the product documents
Wiring Diagram
The circuit connection drawing demonstrates the suggested wiring for the LT-T15 B+C component at a conventional distribution board and also shows the usual marking of L, N, and PE terminals.
T1+T2 Surge Protector vs Other Options: Key Differences for Buyers
Choose the type of surge protective device as well as its capacity and nominal voltage level. The Type 3 classification is for devices that protect the equipment, Types 1 and 2 are devices that discharge lightning strikes at the source or offer protection for the distribution system.
| Feature | This SPD | Alternative |
| Type | Type 1+2 (T1+T2) SPD | Other SPD types available |
| Discharge capacity | Per specification / 6.25kA | Matched to network duty |
| Protection level | 1.25kV | Lower Up options available |
| Application | Main Distribution | Other installation types |
Export Markets & Country Compatibility
Surge protective devices are effectively provided to the projects in more than 40 countries by Leitai company with the relevant local certificates and needed documentation.
SPD Dimensions, Weight & Packing
The dimensions vary with types and poles. For example, LT-T15 B+C offers a compact DIN-rail form for panel-mounting with the protection of terminals during shipping. Dimension drawings come with technical literature.
- Compact DIN-rail form for panel installation
- Shipping terminals are protected
- Specification drawings available for model
Dimensional Drawing
The drawing shown above represents the installation footprint of LT-T15 B+C for use in a DIN rail installation and panel layout planning.
Standards & certifications
The LT-T15 B+C surge protection device was developed to meet IEC 61643-11 and GB/T 18802.11 standards. Type tests and factory tests documents can be provided according to project and geographical specific.
- Design Norm: IEC 61643-11 / GB/T 18802.11.
- Certification: CE (depending on various models).
- Marking of terminals and polarities is done in accordance with the standards.
OEM & B2B supply support
Leitai backs OEM/ODM, wholesale and dealer programs pertaining to surge protection devices, with our manufacturing plant in China.
If the LT-T15 B + C specification is not suitable for you, inform us about your specifications, discharge capability, voltage and required quantities instead.
- Product samples for evaluation are available.
- Quantities can be flexible for manufacturing.
- OEM and ODM services are available for selected projects.
- Options for marking and packing.
- Technical documents for certification.
T1+T2 Surge Protector Buyer FAQ: What You Need to Know
Where is the LT-T15 B+C installed?
It is positioned at the main distribution board or service entrance instead of two separate protective types.
What standards apply?
Combined T1+T2 SPDs have undergone testing according to the IEC 61643-11 / GB/T 18802.11 standards, including complete type-test documentation.
Can I order samples for testing?
Yes, samples can be ordered; as well as OEM/ODM support and wholesale pricing are available to B2B partners.
What is a Type 1+2 SPD?
This is a combination of direct lightning discharge (10/350us) and surge protection (8/20us) in a single DIN-rail device.
Does a T1+T2 SPD need additional Type 3 protection?
A T3 SPD is recommended to be installed in close proximity to the equipment following the cascade coordination scheme.
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