GRL DNPV3L-S5N Solar Fuse Link DC 1500V 250A–630A Ceramic PV Fuse Link Manufacturer

Model No.：

DNPV3L-S5D

Rated Voltage：

1500V DC

Current Range：

250A to 630A

Breaking Capacity：

50KA

Protection Category：

gPV

Standards：

GB/T 13539.6 IEC60269-6

Time constant:

1~3ms

Certifications：

CCC, CE

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Description

Solar Fuse Link Overview

The GRL DNPV3L-S5N series Solar Fuse Link provides an extremely robust, high-capacity DC protection solution for large-scale photovoltaic (PV) power plants. Handling currents from 250A to 630A at 1500V DC, this photovoltaic fuse link is specified by its ‘N’ designation, representing the highly secure Hook type connection. This bolted terminal design ensures superior contact stability, crucial for the main DC switchgear protecting central photovoltaic inverters.

For professionals seeking definitive answers: What is a solar fuse? A solar fuse is a specialized gPV fuse link that adheres to stringent standards like IEC 60269-6. Its core function is the immediate and safe clearance of low overcurrents caused by PV array faults, alongside the interruption of massive short-circuit currents. The DNPV3L-S5N is designed for maximum operational reliability.

GRL, as an industry-leading Manufacturer and Supplier, supports global infrastructure. The DNPV3L-S5N’s superior mechanical integrity (Hook type) makes it highly desirable in vibration-prone environments common in the Asia-Pacific, stringent solar PV standards environments in Europe, and major utility projects in Africa.

Solar Fuse Link Technical Parameters

Model No.	Size	Rated Voltage (V)	Rated Current (A)	I2t(A2S) Pre-Arcing	I2t(A2S) Fusing	0.8In Power dissipation (W)	1.0In Power dissipation (W)	Weight (g)	Mounting
DNPV3L-S5N-250A/1500V DC	3L	1500	250	2480	16900	33	52	1300±3%	M10 21±1 N.m
DNPV3L-S5N-315A/1500V DC	3L	1500	315	4000	21000	36	58	1300±3%	M10 21±1 N.m
DNPV3L-S5N-350A/1500V DC	3L	1500	350	6200	33000	40	66	1300±3%	M10 21±1 N.m
DNPV3L-S5N-400A/1500V DC	3L	1500	400	16200	85000	46	76	1300±3%	M10 21±1 N.m
DNPV3L-S5N-450A/1500V DC	3L	1500	450	25400	133000	49	82	1300±3%	M10 21±1 N.m
DNPV3L-S5N-500A/1500V DC	3L	1500	500	36600	192000	58	97	1300±3%	M10 21±1 N.m
DNPV3L-S5N-550A/1500V DC	3L	1500	550	50000	260000	64	107	1300±3%	M10 21±1 N.m
DNPV3L-S5N-630A/1500V DC	3L	1500	630	50000	260000	89	148	1300±3%	M10 21±1 N.m

Click to read： How do semiconductor fuse links protect against short-circuit conditions?

Solar Fuse Link Features

The DNPV3L-S5N features a high-integrity Hook-type connection, designed for maximum mechanical and electrical stability in the high-current path.

Secure Hook Type Terminals

The Hook type connection (N) provides a bolted interface (M10 mounting, 21±1N.m torque), ensuring a permanent, low-resistance connection that resists the mechanical stress of thermal cycling and vibration. The internal components, including the ceramic PV fuse link body and pure silver element, are chosen for their superior performance at 1500V DC and high thermal resistance.

Enhanced Safety and Predictive Maintenance

The large 3L cartridge ensures comprehensive containment of fault energy (no degassing), protecting high-value switchgear from arc-related damage. For modern operations, this fuse is smart grid-ready. When integrated with compatible fuse bases, the solution offers optional remote contact signaling, providing real-time status updates critical for predictive maintenance scheduling.

GRL DNPV3L S5N Solar Fuse Link

Solar Fuse Link Advantages

The DNPV3L-S5N delivers uncompromising safety and operational consistency for high-power applications.

Mechanical Security: The Hook type connection guarantees a stable, low-resistance electrical interface, vital for high-current applications where terminal integrity is paramount.
Highest Safety Assurance: The 50kA high breaking capacity at 1500V DC provides absolute assurance, safely interrupting the largest possible array short-circuit currents.
PV-Optimized Consistency: Full IEC 60269-6 compliance and reliance on the Joule effect guarantee consistent, rapid protection with no degradation over time.
Energy Efficiency: The industry-leading low power dissipation maximizes the power delivered to the grid while ensuring components operate cooler and last longer.

GRL is dedicated to providing high-volume, reliable components as a committed Producer and Exporter, offering competitive PV fuse link price solutions globally.

Solar Fuse Link Applications

The DNPV3L-S5N is the essential component for securing central power conversion assets.

Essential Circuit Protection

Central Inverter DC Input: Core protection for the DC busbars and terminals of large, centralized photovoltaic inverters.
Main Array Disconnects: Used in high-current disconnect units at the array output.
Major DC Feeder Protection: Safeguarding the main power lines supplying the inverter from the array.

Addressing FAQs: Protection Logic and Installation

Do solar panels need fuses? Yes. Protection is multilayered; while this fuse protects the main line, smaller fuses are required for PV string protection to isolate faults and prevent reverse current from destroying individual modules.

Where should the fuse be located in a solar system? Solar fuses must be located on the DC side of the system. The DNPV3L-S5N, as the primary high-current protection, is typically installed immediately upstream of the central photovoltaic inverter in the main DC switchgear.

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Solar Fuse Link FAQs

1、Where can I find the dimensional drawings for the Hook type connection on the 3L size fuse?

All dimensional and mounting specifications for the Hook type connection are available in the official PV fuse link datasheet and the comprehensive 1500V PV fuse link catalog PDF, accessible via the GRL website.

2、What mounting accessories are recommended for the DNPV3L-S5N?

The DNPV3L-S5N requires a compatible fuse base (e.g., DNPVF series) rated for 1500V DC and the 3L size. Compatibility details and torque specifications (21±1N.m) are found in the technical documentation.

How does GRL ensure the quality of its high-current fuses? GRL is a specialized Manufacturer and Supplier that adheres to stringent quality control, with full compliance to IEC 60269-6. Our construction relies on premium materials, including ceramic PV fuse link bodies and pure silver elements, ensuring long-term reliability.

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