Impulse Voltage Test System
Product Details
1. Introduction
In the development of a modern society, the development of various fields has increased the demand for power. In order to ensure the stability of the power system, it is necessary to increase the emphasis on high-voltage power cable management and choose its test methods and tests reasonably. Technology to find problems in power cables in time. Using reasonable test methods and detection techniques can improve the efficiency and quality of the power sector, reduce energy consumption and waste, and enhance the stability of the power system.
The most common reason for the failure of high-voltage power cables is their own unqualified quality, which will cause huge safety hazards during their operation.
The impulse voltage test system is a test device for high-voltage power products such as power transformers, high-voltage transformers, high-voltage switches, and power cables. Carrying out voltage tests on high-voltage power products can produce standard lightning waves, operating waves, and cut-off waves. It is an essential test instrument for detecting high-voltage power products.
2. Environment
• Maximum altitude: 1000 m
• Altitude increases 100m, and rated voltage lowers 1%
• Operation temperature for HV component: +10 ～ +45℃
• HV component relative humidity (non-condensing) ≤ 95 %
• Temperature for electronic control & measuring: +10 ～ +45℃
• Relative Humidity of electronic components: ≤ 80%
• Components storing and transport temperature: 20 ～ + 60℃
• Anti-seismic: Grade 8
• Grounding resistance: < 0.3Ω
• No dust
3. Main Technical Parameters
• Rated voltage: ±100kV ～ 6000kV (and above)
• Rated energy: 2.5kJ ～ 600kJ
• Rated charging voltage: ±100kV ±200kV
•Stage capacitance: 1.0µF/200kV 2.0µF/100kV(According to total capacitance）
• Standard lightening impulse: 1.2/50µS efficiency: 85 ～ 90% (1.2±30%/50±20%uS )
• Switch impulse: 250/2500µS efficiency: 65 ～ 70% (250±20%/2500±60%uS )
4. Features
(1) Large in voltage utilization coefficient;
(2) Convenient in wave adjustment, simple in operation, excellent in synchronization performance and reliable in motion;
(3) An automatic control technique is adopted in the constant-current charge, which is high automation and strong anti-interference capacity;
(4) A digital measurement and analysis system for the impulse test date are adopted, which increase the technical level and the efficiency of the impulse voltage tests;
(5) High Automaticity;
(6) Optical communication, strong anti interference ability;
(7) Large energy, wide application range.
Main Components
The impulse voltage test system is composed of an impulse voltage generator, a DC charging device, an intelligent control system, a low-damping capacitor voltage divider, a digital measuring machine analysis system, and a multi-stage ball gap interception device.
1. Impulse voltage generator
Our company provides the following four types of impulse voltage generators:
CJDS: The structure is S type, the voltage 100KV-800KV / 80KJ adopts this structure;
CJD △: The structure is △ type, the voltage 400KV-2400KV / 240KJ adopts this structure;
CJDH: The structure is H type, and the voltage is above 1000KV-6000KV / 600KJ.
CJDV: The structure is V type, the voltage 800KV-4000KV / 600KJ adopts this structure;
|
Model |
CJDS-400 |
CJD△-2400 |
CJDH-3600 |
CJDV-4000 |
|
|
Rated voltage (kV) |
±400 |
±2400 |
±3600 |
±4000 |
|
|
Rated energy (kJ) |
20 |
240 |
360 |
400 |
|
|
Rated impulse capacitance (nF) |
250 |
83.33 |
55.55 |
50.0 |
|
|
Rated charging voltage each stage (kV) |
±100 |
±100 |
±200 |
±200 |
|
|
Number of stage |
4 |
24 |
18 |
20 |
|
|
Stage capacitance |
1.0μf/100kV，2.0μf/50kV |
1.0μf/200kV， 2.0μf/100kV |
1.0μf/200kV，2.0μf/100kV |
1.0μf/200kV，2.0μf/100kV |
|
|
Stage energy（kJ） |
5.0 |
10.0 |
20.0 |
20.0 |
|
|
Waveform |
Standard lightening impulse |
1.2/50µS Efficiency: 85% (1.2±30%/50±20%us ) |
1.2/50µS Efficiency: 85-90% (1.2±30%/50±20%us ) |
1.2/50µS Efficiency: 85-90% (1.2±30%/50±20%us ) |
1.2/50µS Efficiency: 85-90% (1.2±30%/50±20%us ) |
|
Switch impulse |
/ |
250/2500µS Efficiency: 65-70% (250±20%/2500±60%us ) |
250/2500µS Efficiency: 65-70% (250±20%/2500±60%uS ) |
250/2500µS Efficiency: 65-70% (250±20%/2500±60%uS ) |
|
|
Chopping wave |
/ |
2-6µS variable |
2-6µS variable |
2-6µS variable |
|
2. Low Damping Capacitive Divider
Low damping capacitive divider is composed of multi section pulse capacitors series connected. Each capacitor flange has short-circuit interface trough, easy for short connecting with HV arm capacitor, thus changing dividing ratio. The resistor adopts multi-section scattered type, and capacitor is non-inductance structure. The low voltage arm is composed
of non-inductance capacitors parallel connected.
2.1 Technical Parameters
• Rated voltage: ±100kV ～ 6000kV(and above)
• Rated capacitance: 100 ～ 1000pF
• Scale factor instability: Kε ≤ ±1 %
• Over-pulse: β≤ 20 %
• Partial response time: Tα ≤ 100 nS
• Type: low resistance capacitive divider
• Standards: scale factor square wave response conforms to IEC60-2.
The capacitor is with damping resistor
• LV arm is single cage non-inductance structure; with wheel at base, movable
3. Multi-stage Gap Chopping Device
The multiple-stage gap chopping device is composed of three HV pulse capacitors through series connection. The whole device is non-inductance low voltage arm type and movable (The wheel is made of Polyurethane so that the floor can be protected). With control desk, the sphere gap can be remotely regulated. The delay triggering function is more stable and reliable. On top of the chopping device is the toroid.
3.1 Technical Parameters
• Nominal voltage: ±400 ～ 3000kV
• Chopping capacitance: 500 ～ 600 pF
• Chopping time: 2 ～ 6uS
• Chopping time deviation: ≤ 0.1uS
• Trigger type: three gap sphere discharge triggering
• Delay type: electronic delay with regulatable circuit
FAQ
Q: Can I visit your factory?
A: All the customers from both home and abroad are warmly welcomed to visit our company and factory.
Q: Do you supply the installation and commissioning?
A: Yes, we do as followings:
-As soon as customer informed us the machines are put in the right place, we will send both mechanical and electrical engineer for machine start up.
-No-load testing: After machine installed completely, we make no-load testing first.
-With-load testing: Usually we will can produce 3 different wires to make load testing.
-Acceptance report: After the buyer confirms that machine can reach all specification under contract, the acceptance report will be signed for our record that machine will be in guarantee period.
Q: What information should I offer to get a detailed quotation from you?
A: For single machine: Usually we need to know inlet wire size, outlet wire size to be produced, productivity, pay off and take up size to choose the right machine.
For new cable plant or new cable production line, we need to know the datasheet of cables to be produced, the productivity, the standards to be followed, etc to design all machines needed.
Q: Can you supply the auxiliary equipment along with the machines?
A: Yes, definitely.
We has supplied heat exchanger, copper/aluminum powder filter machine, cooling tower, chiller, air compressor, drawing dies, pointing machine, cold welders, bobbins etc. with our machines.
Q: Could you do the design for the whole plant?
A: Yes, this is our advantage.
With the data sheet of cable to be produced, the standard your cables should follows, the productivity you expected. Our engineer on production technology and machinery will make design of production machines, test equipment, accessories like bobbins, dies, rewinding lines and materials needed.
Q: How can I know the status of my order?
A: We have our OA system on tracking the production.
For any of your request we can send photos and videos of your order, also we can use FACETIME to let you know the production.
Q: How do you work on the inspection before delivery?
A: We will make dynamic balance testing, levelness testing, noise testing, etc. during production.
After production finished, usually we make no-load running of each machine before delivery. Customers are welcomed to attend the inspection.
Q: What exhibitions will you attend, can we meet in the fair?
A: Dusseldorf International Wire and Cable Fair;
Wire South America Fair;
International Wire and Cable Fair in Shanghai;
International Istanbul Wire Fair, etc.
wire Southeast Asia Fair, etc.
