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NES-12 Withdrawable Medium-Voltage Switchgear

NES-12 Withdrawable Medium-Voltage Switchgear
NES-12 Withdrawable Medium-Voltage Switchgear
NES-12 Withdrawable Medium-Voltage Switchgear

Intelligent Withdrawable Medium-Voltage Switchgear System featuring German technology heritage, 5000A high-current capacity, and full-lifecycle intelligent management for reliable power distribution solutions.

Seismic class 8
5000 A High Current
Five Precautions Interlocking
Full-Status Online Monitoring
50 kA High Breaking Capacity
0.5 second internal arc fault protection
Model:NES-12
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Key Benefits

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High-Capacity Power Distribution
Main busbar current up to 5000A and rated short-time withstand current up to 50kA.
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Multiple Safety Protection
Complete five-precautions interlocking, 0.5 s internal arc fault protection and seismic class 8 certification.
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Full-Dimension Intelligence
Integrated temperature monitoring, partial discharge monitoring and insulation warning, supporting remote electric operation.
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Flexible Modular Design
The withdrawable switchgear supports single, double and triple busbar systems and is compatible with any international brand of vacuum circuit breaker.

Product Overview

NES-12 is an intelligent indoor metal-clad withdrawable switchgear developed by NATUS Electric as the German NATUS Electric Asia-Pacific R&D and manufacturing base. Based on German core technology, it is rated for 12kV, with the series covering 3.6-40.5 kV. The withdrawable medium-voltage switchgear adopts air insulation technology and a three-phase AC 50Hz single-busbar system design.
Compared with traditional medium-voltage switchgear, the NES-12 medium-voltage switchgear is equipped with a new-generation online switch monitoring and analysis system to realize full-lifecycle intelligent management. Its modular structure supports flexible configuration. With a maximum main busbar current of 5000A and rated short-circuit breaking current of 50kA, it meets high-capacity power distribution requirements. The metal-clad withdrawable switchgear has passed type tests, seismic intensity 8 testing and 0.5-second internal arc fault protection testing, and has long-term stable operating experience in global power systems.
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Product Structure

Passed type test, arc-firing test and seismic intensity test Metal-enclosed and air-insulated，Single, double and triple busbar systems
The instrument room is equipped with some necessary secondary components, such as various relays, meters, signal indications, operating switches, etc., and a small bus bar can be installed on the top to facilitate construction and be sealed with a metal cover plate.

Technical Advantages

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High-Reliability Design with German Technology Heritage
Originating from German electrical technology since 1956, the metal-clad withdrawable switchgear has passed multiple rigorous global certifications and has extensive mature operating experience.
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Convenient Operation and Maintenance Design
Circuit breakers and grounding switches support closed-door operation; wall-mounted versions allow full front maintenance, with independent compartments for easier maintenance.
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Long-Life and Maintenance-Free Features
The low voltage vacuum circuit breaker has a mechanical life of 30,000 operations, the grounding switch has a mechanical life of 3,000 operations, and the high-quality aluminum-zinc coated housing resists corrosion and oxidation.

Technical Specifications

Core Technical Parameter Summary


Basic Parameters
Rated voltage12 kVSeries covers 3.6–40.5 kV
Rated frequency50 Hz-
Rated current630/1250/1600/2000/2500/3150/4000/5000 A-
Rated short-circuit breaking current25/31.5/40/50 kA-
4 s rated short-time withstand current25/31.5/40/50 kA-
Rated peak withstand current63/80/100/125 kA-
Vacuum circuit breaker mechanical life30,000 operations-
Grounding switch mechanical life3,000 operations-
Shell protection gradeIP4XIP2X between compartments
Operating voltageAC/DC 110 V/220 V-
Standard cubicle dimensions800/1000 × 1500 × 2360 mm650 mm wide cubicle optional for ≤1250 A



Main Technical Parameters


Basic Parameters
Rated voltagekV12
Lightning impulse insulation levelkVPhase-to-phase / phase-to-ground 75; breaking gap 85
1 min power-frequency withstand insulation levelkVPhase-to-phase / phase-to-ground 42; breaking gap 48
Rated frequencyHz50
Rated currentA630, 1250, 1600, 2000, 2500, 3150, 4000, 5000
Rated short-circuit breaking currentkA25, 31.5, 40; 31.5, 40, 50
4 s rated short-time withstand currentkA25, 31.5, 40; 31.5, 40, 50
Rated peak withstand currentkA63, 80, 100; 80, 100, 125
Rated short-circuit closing currentkA63, 80, 100; 80, 100, 125
Rated sequence of operation-O-0.3 s-CO-180 s-CO (40, 50 kA: O-180 s-CO-180 s-CO)
Rated thermal stability currentkA25, 31.5, 40, 50
Interphase center distancemm210; 275
Rated short-circuit current breaking timestimes50; 30, 20
Mechanical life of vacuum circuit breakertimes30000 (10000)
Grounding switch mechanical lifetimes3000
Rated operating voltage of opening and closing coilsVAC/DC 110 V/220 V
Rated operating voltage of energy storage motorVAC/DC 110 V/220 V
Energy storage time of motors≤15 s
Shell protection grade-IP4X


Notes: For other vacuum circuit breaker options, contact the manufacturer. Forced air cooling is used.

Applicable Standards: GB/T 3906-2020, GB/T 11022-2020, DL/T 404-2007, IEC 60298:1990

Application Scenarios
工业行业
交通枢纽
石油石化

Product FAQ

The nes 12kv medium voltage switchgear is equipped with NVT series vacuum circuit breakers as standard, and also supports customized Schneider, ABB, Siemens and other international brands.
Yes. The wall-mounted version supports full front maintenance without reserving rear maintenance space.
Products with rated current ≤1250A can provide a 650mm narrow cubicle option to save distribution room space.
Under normal operation, routine inspection is carried out every 1-2 years, mainly covering the operating mechanism, secondary circuit and insulation status.
Optional fluorescent optical fiber temperature monitoring, online partial discharge monitoring and insulation component failure warning system are available, supporting access to distribution automation platforms.
The delivery time for standard configuration is 3-4 weeks. Customized withdrawable switchgear products depend on customization scope, generally 4-6 weeks.

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Need customized configurations, CAD drawings, or a competitive price for this product? Submit your project requirements and our engineering team will get back to you within 24 hours.
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    Email: icd@natus-cn.com
    Tel: 400-928-1888
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