Power Transmission and Distribution Equipment: Customized Solutions for Grid, New Energy & Metro | Juhonkia

Juhonkia specializes in R&D, production and supply of high-quality power transmission and distribution equipment. Our portfolio covers transmission equipment (power transformers, GIS) and distribution equipment (ring main units, prefabricated substations), all certified by CNAS, IEC and State Grid. We provide tailored solutions for wind power, metro, industrial parks, supporting stable power supply for global customers since 2010.

Technical Advantages & Quality Assurance

1.Core Technical Advantages

• Smart Monitoring Technology

• Equipped with IoT sensors: Real-time collect equipment temperature, partial discharge, load current data

• Data transmission: connect to user’s power monitoring platform

• Early warning function: Predict potential faults 7-14 days in advance (proven by 3-year operation data)

• Environmental Adaptation Technology

• High-temperature resistance: Equipment can operate stably at -40℃ - 40℃

• Dustproof and waterproof: Protection level up to IP67 

2.Strict Quality Control Process

• Full-Link Testing

• Incoming material inspection: 100% inspection of core components (e.g., transformers, circuit breakers) with inspection reports

• Semi-finished product test: Insulation resistance test, mechanical operation test 

• Factory final test:

• 72-hour full-load operation test (all units must pass)

• On-site simulation test (simulate user’s actual working conditions)

• Quality Data

• Factory pass rate: ≥99.92% (2023 annual data)

• Customer complaint rate: ≤0.08% (2023 annual data)

• Average service life: 15+ years (verified by 10-year old equipment in Zhejiang Grid)

3.Authoritative Certifications

State Grid/China Southern Power Grid access certification

GB/T 9001-2016 idt ISO 9001:2015(Quality management system)

GB/T 24001-2016 idt ISO14001:2015（Environmental management system certification）

CNAS laboratory accreditation

Industry Application Cases

New Energy Sector

• Inner Mongolia Wind Farm Project

• Project Background：200MW wind power base, need to solve “low temperature (-35℃) startup, remote maintenance” problems

• Equipment Solution：15 sets of 35kV ZGS11 prefabricated substations + 30 sets of 12kV solid-insulated RMU

• Implementation Results：Stable operation for 4 years, fault rate 0%

• Maintenance frequency reduced by 50% (via smart monitoring)

•  Customer Feedback：“Juhonkia’s equipment adapts well to harsh environments, ensuring our wind power output stability.” —— Engineer Li, Inner Mongolia Wind Power Co.

Municipal Infrastructure Sector

• Hangzhou Metro Project

• Project Background：Underground metro line, need “no SF6 leakage, anti-interference, 24/7 continuous power supply”

• Equipment Solution：86 sets of 12kV solid-insulated RMU (with anti-electromagnetic interference design)

• Implementation Results：Put into operation in 2019, zero power outage caused by equipment failure

• Meet metro “safety level 2” standard (highest level for urban rail transit)

Customized OEM/ODM Services

Customization Scope

• Voltage level: Customize 6kV-220kV according to user’s grid parameters

• Insulation medium: SF6/air-insulated (based on environmental requirements)

• Smart functions: Add remote control, fault recording, energy metering modules

• Appearance size: Customize for narrow spaces (e.g., underground metro tunnels)

Customization Process

• Demand Communication: Assign 1-on-1 technical consultant to confirm grid parameters, environmental conditions, delivery time

• Scheme Design: Provide 2-3 alternative solutions (with cost and performance comparison)

• Sample Production: Produce samples after scheme confirmation (sample testing report provided)

• Mass Production: Start mass production after sample acceptance (weekly progress update to user)

• Delivery & After-sales: Provide installation manual, on-site training; 24/7 technical support