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ELSF-160/250 Fuse Type Isolating Switch | Universal AC DC Protection For Telecom UPS PV
2026-07-09
The booming distributed PV, 5G telecom station, and data center UPS industries bring obvious headaches for switchgear factories and EPC contractors. Traditional separate AC and DC fuse solutions lead to high inventory costs, wasted cabinet space, certification compliance risks, and condensation burnout issues in humid power rooms.
Our upgraded ELSF-160/250 integrated fuse-type isolating switch addresses all these challenges, delivering one unified solution for both alternating and direct current low-voltage systems for global 2026 power projects.
Universal Compatibility: Dual Frame Sizes + Full Fuse Link Matching
The ELSF series is engineered for standard NH00 and NH01 fuse links, featuring two frame sizes to cover mainstream load current ranges:
- ELSF-160 (Max 160A): Matches RT16-00 / NH00 fuse links
- ELSF-250 (Max 250A): Matches RT16-1 / NH01 fuse links
It features ultra-wide voltage coverage compliant with global power standards:
- DC range: 220–500VDC (custom 1500VDC version available for large-scale solar plants)
- AC range: 400–690VAC for industrial and commercial distribution
Fuse current options range from 4A to 250A for flexible load matching. 2P, 3P, and 4P pole versions are available to support single-phase and three-phase cabinet layouts.
Why ELSF Integrated Isolator Outperforms Split Fuse & Disconnector Designs
Most electrical designers still adopt separate fuse holders and isolating switches, which cause redundant costs and assembly troubles. The all-in-one ELSF structure provides measurable benefits for manufacturers and installers:
- Save 35% cabinet space: Combines isolation and overcurrent protection in one single unit
- Cut SKU inventory by half: One model covers both AC and DC loads to reduce stock pressure
- Faster cabinet assembly: Simplified internal wiring shortens production lead time
- Enhanced safety: Synchronous multi-pole disconnection eliminates neutral overload risks for PV and telecom DC systems
Fully Certified Technical Performance for Global Export
The entire ELSF lineup complies with IEC60529 standards and is certified with CE, CB, KEMA, RoHS, and ISO9001, fully approved for EU, Southeast Asia, Latin America, and Middle East engineering projects.
Key technical parameters:
- Rated insulation voltage: 1000V; Impulse withstand voltage: 8kV
- Rated conditional short-circuit current: 50kArms
- Durability: 200 electrical operations / 1400 mechanical operations
- Low power loss: 3.5W/phase (ELSF-160), 7.5W/phase (ELSF-250)
- IP protection: IP20 (cover open), IP30 (cover closed)
Two utilization categories are available for targeted scenarios:
- DC22B: Optimized for frequent DC loads such as solar power and telecom power cabinets
- AC21B: Designed for AC lighting, capacitor banks, and general industrial equipment
Core Application Scenarios
Thanks to its universal AC/DC capability, the ELSF series becomes a standard component for fast-growing low-voltage industries:
- Data center & server UPS power cabinets
- 5G telecom base station 48V DC power systems
- Metering and lighting Distribution Boards
- Capacitor bank reactive power compensation panels
- Rooftop PV and small-generation low-voltage protection
- General grid main fuse isolation switchgear
Reliable Performance Under Harsh Working Conditions
Designed for fluctuating temperature and humidity in indoor and outdoor electrical rooms, the ELSF series delivers stable operation in harsh environments:
- Operating temperature: -5°C ~ +50°C
- Anti-condensation structure, withstands 90% RH @ 20°C
- Pollution Level 3 resistant, vibration-proof housing
- Suitable for installation away from flammable or hazardous materials
Frequently Asked Questions
1. What fuse links are compatible with ELSF-160/250?
ELSF-160 matches RT16-00 / NH00 fuse links; ELSF-250 matches RT16-1 / NH01 fuse links, current range from 4A to 250A.
2. Can this switch be used for both AC and DC circuits?
Yes. It supports 220–500VDC and 400–690VAC, ideal for hybrid solar and grid distribution systems.
3. What pole options are available?
2-pole, 3-pole, and 4-pole models are in stock for bulk orders.
4. Does ELSF support international project certification?
It holds CE, CB, KEMA, RoHS, and ISO9001, fully compliant with IEC standards for overseas tender projects.
5. What is the IP rating?
IP20 with cover open, IP30 with cover fully closed for dust protection.
Need customized configurations or bulk pricing for your switchgear projects? Contact our engineering team to get matched RT fuse links, official datasheets, and project-oriented technical recommendations.