Cascade Power-Frequency Testing Voltage Devider 300kv 300PF

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: JKJHCF-300
• Max Diameter of Workpiece: 1600mm
• Mass Scope of Workpiece: 2000kg
• Type: Impact Testing Machine
• Maxcapacity: <1000KN
• Accuracy Grade: 0.5
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Display: Digital
• Control: Manual Control
• Weight: 100-500Kg
• Power Source: AC220V
• Oil Cylinder Position: Under
• Transport Package: 200*200*200cm
• Specification: 460mm*420mm*260mm
• Trademark: YZKJ
• Origin: China
• Production Capacity: 300pieces/Year

Product Description

Product Description

IMPULSE VOLTAGE TEST SYSTEM

Impulse voltage test system can be used to generate lightning impulse (1.2±30%/ 50±20%μs), LI (T1:1~5μs, T2: 40~60μs) for cable testing, chopped lightning impulse(chopped time between 2~5μs to test power transformers, instrument / voltage transformersandbushings), switching impulse (250±20%/2500±60%μs)and steep front wave forms(to test glass insulator, composite insulators or ceramicinsulators).

Specification

Applications  

1. Precise High-Voltage Measurement
Suitable for power system operation and maintenance, as well as electrical equipment manufacturing scenarios, it can accurately measure power frequency AC high voltage and DC high voltage. Whether it is on-site high-voltage testing or laboratory calibration, it can convert high voltages of several thousand volts or even millions of volts into low-voltage signals (such as a voltage division ratio of 1000:1), allowing digital meters to directly read voltage values.
2. Circuit Functional Applications
In electronic circuits, voltage dividers are used for level setting (such as transistor biasing), sensor signal conditioning (such as scaling the output voltage for microcontroller acquisition), reference voltage generation, and impedance matching. For example, voltage can be flexibly distributed by adjusting resistance values to achieve voltage reduction or distribution.
3. Safety Protection
Voltage dividers can limit high voltages within a safe range, protect low-voltage components from damage, and achieve electrical isolation to avoid high-voltage interference with low-voltage circuits.

Key Configurations

High-voltage Arm and Low-voltage Arm: The voltage divider is composed of a high-voltage arm and a low-voltage arm connected in series. The high-voltage input is connected to the terminal post at the top of the grading sphere, and the low-voltage output is connected to the measuring instrument through a coaxial cable The entire device adopts a balanced equipotential shielding structure and consists of two parts: the voltage divider and the measuring instrument.
Voltage Division Ratio Setting: The standard voltage division ratio is 1000:1. Below 200kV, 1000:1 is usually adopted, and below 300kV, 1000:1 is also adopted. It has high input impedance, which reduces the test current and power consumption, making the product small in size, light in weight and stable in performance
Display and Measurement: The low-voltage display can directly read voltage values such as DC average value, AC peak value and true effective value. The range is usually divided into Low gear (0-20kV) and High gear (such as 0-50kV, 0-100kV, etc.)
Signal Connection: The voltage divider and the low-voltage display are connected through a dedicated coaxial cable. The signal processing part uses high-performance OP for signal amplification, adopts dual-integral AD sampling technology, and has a four-bit liquid crystal display
Grounding System: Equipped with a matching grounding wire, a dedicated grounding post is installed on the base of the voltage divider. The grounding post must be reliably grounded before each use to ensure that the grounding resistance is ≤4Ω
Grading Sphere Design: The high-voltage end adopts a grading sphere made of aluminum alloy material, which effectively improves the electric field distribution, prevents tip discharge, and improves the anti-interference ability of measurement data

Technical Specifications

(Custom configurations available upon request.)

Impulse voltage divider for measurement of LI, SI and LIC from 100kV to 3600kV( Capacitance 300~1000pF, Measuring accuracy: ≤±3%);

Capacitive voltage divider for AC measurement from 50kV to 2000kV (Measuring accuracy: ≤±1%);

Resistive voltage divider for DC measurement from 20kV to 2400kV (Measuring  accuracy: ≤±1%);

AC, DC or Impulse measurement

Company Profile

Yangzhou Kejia Electronic Equipment Co., Ltd.

 Yangzhou Kejia Electronics is a leading Chinese manufacturer of high-voltage testing equipment, specializing in partial discharge (PD) detection systems. With over four decades of innovation, our "KJF" series products—including PD detectors, digital testing systems, and PD-free test equipment—serve industries from power utilities to transformer/switchgear manufacturing.
Innovation Driven by Experience
Our R&D team (backed by university partnerships) has secured 30+ patents, ensuring reliability and precision. Trusted by 100+ Chinese giants like Shenyang Transformer Research Institute and Xi'an High Voltage Switch Factory, our solutions also export to Korea, India, and beyond, earning a reputation for "zero-compromise quality."
Service Beyond Machines
With a 50-strong team, we offer tailored solutions, rapid prototyping, and 24/7 support. Our promise: "Choose Kejia, Choose Peace of Mind." Nationwide service hubs ensure quick delivery and on-site testing, turning every project into a long-term partnership.
Based in Yangzhou, Powering the World
Factory Address: No. 177 Shouxihu Road, Yangzhou
For four decades, we've been transforming electrical safety—one reliable test at a time.

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

IMPULSE VOLTAGE TEST SYSTEM
AC VOLTAGE TEST  TRANSFORMERS
REGULATING TRANSFORMER
RESISTORS
CORONA RINGS AND
SHIELDED PARTS

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.
 
Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.
 
Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).
 
Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.