GRL DNPV3L-S5D Solar Fuse Link DC 1500V 250A to 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-S5D series solar fuse link represents the highest capacity class of high-speed DC circuit protection for photovoltaic systems. Rated for 1500V DC and accommodating substantial currents from 250A up to 630A, this photovoltaic fuse link is engineered for critical protection of centralized photovoltaic inverters and major array disconnects in large utility-scale solar parks. The ‘D’ designation signifies a robust knife-type contactor for secure, high-contact-pressure plug-in mounting.

A necessary clarification for all technical users: What is a solar fuse? It is a specialized, current-limiting gPV fuse link, specifically designed and certified under IEC 60269-6 to safely interrupt the low overcurrents and massive short-circuit currents unique to PV arrays. The DNPV3L-S5D ensures absolute protection and operational longevity for the most significant power assets.

GRL is a dedicated Manufacturer and leading Supplier committed to supporting the global energy transition. This high-voltage PV fuse link is crucial for massive solar infrastructure projects across the Asia-Pacific, stringent regulatory environments in Europe, and major utility deployments in Africa, where reliable high-power protection is non-negotiable.

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-S5D-250A/1500V DC	3L	1500	250	2480	16900	33	52	1300±3%	M10 21±1 N.m
DNPV3L-S5D-315A/1500V DC	3L	1500	315	4000	21000	36	58	1300±3%	M10 21±1 N.m
DNPV3L-S5D-350A/1500V DC	3L	1500	350	6200	33000	40	66	1300±3%	M10 21±1 N.m
DNPV3L-S5D-400A/1500V DC	3L	1500	400	16200	85000	46	76	1300±3%	M10 21±1 N.m
DNPV3L-S5D-450A/1500V DC	3L	1500	450	25400	133000	49	82	1300±3%	M10 21±1 N.m
DNPV3L-S5D-500A/1500V DC	3L	1500	500	36600	192000	58	97	1300±3%	M10 21±1 N.m
DNPV3L-S5D-550A/1500V DC	3L	1500	550	50000	260000	64	107	1300±3%	M10 21±1 N.m
DNPV3L-S5D-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-S5D features the Knife type (D) contact, designed for plug-in operation into compatible high-power fuse bases, ensuring fast replacement and maintenance.

High-Integrity Construction

This high-voltage PV fuse link utilizes the highest quality materials, including a specialized ceramic PV fuse link body for exceptional thermal shock resistance. The pure silver element and silver-plated copper contacts ensure minimal resistance, which is critical at 630A. The Knife type contactor facilitates a high-pressure, secure connection with the fuse base, ensuring excellent electrical contact.

Safety and Smart Readiness

The internal architecture is designed for safety, guaranteeing that fault energy is completely contained within the cartridge (no degassing), a vital feature for protecting high-value switchgear. For operational readiness, the fuse supports connection to smart grid systems via optional remote contact signaling, enabling real-time status monitoring and simplifying maintenance across vast solar parks.

GRL DNPV3L S5D Solar Fuse Link 1

Solar Fuse Link Advantages

The DNPV3L-S5D is the choice for absolute centralized protection.

Maximum Capacity, Minimal Loss: The 3L size delivers up to 630A protection with exceptional low power dissipation, maximizing energy throughput and efficiency.
Guaranteed Consistency: The gPV characteristic curve and reliance on the predictable Joule effect ensure that the fuse provides consistent, no degradation over time protection for decades.
Highest DC Safety Assurance: The 50kA high breaking capacity at 1500V DC is a non-negotiable safety feature, providing confidence in the face of massive array short-circuit currents.
Simplified Maintenance (Knife Type): The plug-in knife-type fuse format simplifies replacement during maintenance, reducing downtime and labor costs.

GRL is a reliable Exporter and Producer, providing optimized supply chain solutions and competitive PV fuse link prices for utility-scale projects.

Solar Fuse Link Applications

The DNPV3L-S5D is the critical protection device for the main lines feeding the inverter.

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 located between the array and the power conversion stage.
High-Capacity Re-Combiner Boxes: Placed at the output of the final power aggregation stage.

Addressing FAQs: Protection, Placement, and Sizing

Do solar panels need fuses? While this high-capacity fuse protects the main circuit, the principle remains: fuses are essential to protect the entire PV string from destructive reverse current during faults, which can exceed the module’s maximum series fuse rating.

Where should the fuse be located in a solar system? Solar fuses must be located on the DC side. The DNPV3L-S5D, being a high-capacity fuse, is typically placed in the main DC switchgear, immediately upstream of the central photovoltaic inverter.

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Solar Fuse Link FAQs

1、What is the primary application difference between 3L and 2XL fuses?

The 3L size (up to 630A) is typically used for the final stage of protection, safeguarding the centralized photovoltaic inverters. The 2XL size (up to 400A) is used for array aggregation or inputs to large string inverters.

2、Is the DNPV3L-S5D compatible with a remote status indicator?

Yes. When installed in a compatible fuse base, the DNPV3L-S5D solution can support options like local visual indicators and remote contact signaling, facilitating its role in smart grid monitoring.

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