Electronic voltage sensors used in smart circuit breakers for
medium and low voltage power distribution fields
Description
CDJ-S-36KV-M21 electronic voltage sensor is a new type of 20-35kV
electronic voltage sensor. The sensor is mainly used with
smart circuit breakers or in switch cabinets to monitor and collect
voltage analog quantities. A single sensor or a combination of
three sensors is suitable for medium and low-voltage power
distribution fields.
Features
Simplifying the system structure, directly outputting standard
small signals without secondary conversion, reducing the source of
errors
The output internal resistance is small, overcoming errors caused
by cables; it has strong adaptability and can be adapted to various
cables;
Composite film capacitors using CVT transformer structure have good
long-term stability;
The accuracy change affected by ambient temperature is less than
0.5%.
Application
The electronic voltage sensor is suitable for 10kV column circuit
breakers, 10kV switch cabinets, load switches, inflatable cabinets
and solid cabinets. It is mainly used to detect line phase sequence
and zero sequence voltage, direction judgment and phase angle
protection.
Technical Parameter
1. Capacitance | 210pF, allowable deviation ±20pF |
2. Operating temperature | -25℃~+40℃ |
3. Accuracy | ±0.5%: 0.5 level |
4. Rated transformation ratio | (36kV/√3) / (3.25V/√3), rated Fixed load 10MΩ |
5. Power frequency | AC70kV 1min |
6. Partial discharge | 39.6kV<5pC |
7. Lightning impulse | 170kV, 15 times each of positive and negative polarity |
Dimension
COMPANY OVERVIEW
- Xian Xiwuer Electronic and Info. Co., Ltd is a wholly state-owned company with a registered capital of CNY
101.465 million (exchanged to USD15.85 million), owning total
assets of CNY315 million (traded to USD 49.22 million). It was
established in 1976. Currently, it has about 460 employees, with an
annual sales income of CN280 million (exchanged to USD43.75
million). The company has four production and business bases
covering an area of 43052 square meters, and a construction area of
more than 50000 square meters. The company has 8 persons with
master's degrees, more than 80 engineers with senior technical
titles 12 technicians who have been awarded Experts with
Outstanding Contributions by the Xian municipal government, and 1
expert who has been enjoying a special allowance from the State
Council.
- The main products include
• Smart Embedded Epoxy Pole;
• Integrated Instrument Transformer
• Capacitive Voltage Divider;
• High Voltage Capacitor Rod;
• High Voltage Film Capacitor;
• High Voltage Resistor;
• Primary and Secondary Integrated Intelligent assembly and
components with the function of voltage measurement, current
measurement, protection, temperature monitoring, and power supply;
• Medium-High Voltage components/parts/ assembly;
• Surge Protective Device for Power Supply System;
• Chips for lightening devices;
• Zinc Oxide Varistor;Thermistor.
Major Customers: ABB, Schneider, GE, ZTE, XD Electric, XJ Electric, PingGao Electric
and etc.
- The company has the provincial Technical R&D Center. The
company has developing and manufacturing experiences of the key
products HV Ceramic Capacitor, SPD, Varistor, Thermistor and for
nearly 20 years. There have been 32 patented technology, 4
invention patents, and 4 national key new products. The company is
in the leading position in the same industry. The company has grown
very fast with a unique management system which is the fundamental
guarantee to the continuous development of the enterprise under the
state-owned system. In Northwest China, the company is the first to
implement ISO 9001 standards and the first to promote the use of
ERP management systems, having achieved ISO9001, ISO14001, and
ISO45001 approval, thus standardizing and improving the management
level of the company.
- Through continuous technological innovation, product R&D, and
quality improvement the main technical performance and reliability
of the products are at the internationally advanced level as the
same level with Panasonic and Siemens. The products have got UL,
VDE, TUV, CAS, CE, CQC, RoHS, and REACH Certification. The company
has advanced production equipment among which the key production
equipment and modern assembly lines are imported from Japan, the
U.S.A, Germany, Korea, and Belgium including 26m large sintering
tunnel furnaces8 automatic assembly lines, the largest energy
impulse current generator and a series of special test equipment
and environmental test equipment. In the same industry in China,
the company has the largest production capacity, the highest degree
of automation with the most complete testing methods. The company
has two routine test laboratories with the most advanced lightning
testing equipment and environmental testing equipment which comply
with national standards for laboratory construction. They are the
significant laboratories supported by Shaanxi Province with
professional testing technicians undertaking part of the
supervision and inspection of electronic products in Shaanxi
Province at the same time.
- We believe we are able to supply satisfied goods and services to
customers at home and abroad with the most reasonable price and the
shortest delivery time. on the bases of our excellent quality
assurance capacity, technical development capacity, and rich
manufacturing experiences.
CERTIFICATE