English
Guangdong Ruisite Electric Co., Ltd. is a professional designer and manufacturer specializing in power resistors and electrical testing solutions. Our core products include Neutral Grounding Resistors (NERs), AC/DC Load Banks (both air-cooled and liquid-cooled), Braking Resistors for industrial applications, and a full range of power resistors such as Aluminum Housed, Wirewound, and Ceramic types. We serve industries including power generation, ports, mining, renewable energy, data centers, and industrial automation .
Our factory and headquarters are located in Huangjiang Town, Dongguan City, Guangdong Province.
We have over 10 years of dedicated experience in the power resistor industry, with a strong focus on research, development, and customized solutions for demanding applications.
Yes, our products are manufactured under strict quality control systems and comply with relevant international standards, including IEEE 32, IEC 60076, and RoHS requirements. We hold certifications such as ISO9001 for our quality management system .
We offer a comprehensive range of load banks including:
● AC Resistive Load Banks
● AC RCD (Resistive-Capacitive-Inductive) Load Banks
● DC Load Banks (including regenerative types)
● Liquid-Cooled Load Banks for high-power density applications
● Low-voltage and medium-voltage models
● Power range: from 1kW to 10MW+ per unit
NERs are critical safety devices used in medium-voltage power systems (such as generators, transformers, and distribution networks) to limit earth fault currents to a safe level. This protects personnel from dangerous touch potentials, reduces arc-flash hazards, and prevents damage to transformers, cables, and switchgear during a single line-to-ground fault .
We manufacture braking resistors for variable frequency drives (VFDs), servo motors, and industrial machinery. Our range includes:
● Stainless steel grid resistors for heavy-duty applications (cranes, ports, mining)
● Aluminum housed resistors for general industrial use
● Ceramic wirewound resistors for dynamic braking in smaller drives
● Custom solutions for special voltage and power requirements
Absolutely. We specialize in custom engineering. Please provide us with your technical parameters including:
● Power rating (kW/MW)
● Voltage (AC/DC, single-phase/three-phase)
● Resistance value (ohms) or current rating
● Duty cycle / operating time
● Cooling method preference (air-cooled or liquid-cooled)
● Enclosure/IP rating requirements
● Dimensions or space limitations
● Control method (manual, remote, PLC integration)
Lead time depends on complexity and order quantity. Standard products typically ship within 7-15 working days. Custom-engineered solutions generally require 15-30 working days for design, manufacturing, and testing. Please contact our sales team for a specific quotation.
Based on different countries and customers' procurement budgets, different construction standards are selected. Examples include customer-specified standards, industry standards, China Classification Society (CCS) standards, and Bureau Veritas (BV) standards.
Our load banks cover:
● Power range: 1kW to 10,000kW (10MW) per unit
● AC voltage: 110V, 220V, 380V, 400V, 415V, 480V, 690V, and up to 1000V
● DC voltage: 12V, 24V, 48V, 110V, 220V, 400V, 800V, and custom voltages
● Frequency: 50Hz, 60Hz, or 400Hz for aviation applications
Our load banks and resistor products can be equipped with multiple safety features including:
● Over-temperature protection with automatic shutdown
● Over-current and over-voltage protection
● Emergency stop button
● Audible/visual alarms
● IP-rated enclosures (IP20 to IP67) for environmental protection
● Thermal sensors and fan failure detection
Yes. We offer optional digital meters displaying voltage, current, frequency, power, and temperature. For remote control, we support manual control panels, PLC interfaces, RS485/Modbus communication, and PC-based software control .
We have no strict MOQ for standard products. Sample orders and small quantities are welcome for testing and evaluation. For custom-engineered products, MOQ may apply depending on complexity and manufacturing requirements.
We typically accept T/T (bank transfer) and L/C (Letter of Credit). Specific payment terms can be negotiated for long-term partnerships and regular orders.
We work with reliable international freight forwarders to offer flexible shipping options including sea freight, air freight, and express courier services (DHL, FedEx, UPS). We can ship FOB Shenzhen, CIF, or EXW as per customer requirements.
Yes, we provide a standard 12-month warranty on all our products from the date of shipment. During the warranty period, any quality issues caused by manufacturing defects will be covered. Extended warranty options are available upon request.
We offer comprehensive technical support including:
● Pre-sales engineering consultation and product selection
● Custom design and application engineering
● Installation and commissioning guidance
● Operation and maintenance documentation
● Remote troubleshooting support
● On-site technical assistance (available upon request)
Yes, we maintain a stock of common spare parts such as cooling fans, contactors, control boards, and resistance elements for our standard product lines. We can also provide maintenance recommendations and procedures to extend product life.
To request a quotation, please contact us via:
● Email: info@rst-electric.com
● Mobile/WhatsApp/WeChat: +86 15602914508
● Please provide your detailed technical requirements to help us prepare an accurate quotation .
We are actively expanding our global partner network. Please contact us directly to inquire about representation in your region or to discuss potential partnership opportunities. We welcome inquiries from qualified distributors and agents worldwide.
