I.The Scope

The generator is suitable for the test of the air gap insulator string, casing, power transformers and transformer standard lightning impulse voltage full wave, standard operating wave and chopped wave impulse voltage test.

II.The General Conditions of Use

Altitude: ≤1000m

Ambient temperature: -5 ºC ~ +40 ºC

Relative humidity: ≤90%(20ºC)

Use of the environment: indoor

 Non-conductive dust

Grounding resistance < 0.5 Ω

No fire or explosion hazard

Earthquake resistance: 8 magnitude

There is no gas that corrodes metal and insulates

Supply voltage waveform is the actual sine wave, waveform distortion rate <5%

III.The Nominal Parameter Values

1. Nominal voltage: ±3000kV

2. Rated voltage: ±200kV

3,Nominal energy:450 kJ

4,impact the total capacitance: 0.1mF (3.0mF /100 kV single pulse capacitor, a total of 30)

5,Series: level 15

6. Impact voltage waveform parameters:6

Standard lightning strike voltage full wave 1.2±30%ms /50±20%ms

The amplitude± 3%  The peak oscillation is not

greater than 5% of the amplitude;

Shock wave shape: 1000ms/kv-1500us/KV

Impulse

voltage waveform parameters and their deviations 

are in line with national GB311 and GB16927 

standard requirements.

7. Minimum output voltage:>10%Un

8. Duration: up to 70% of the rated voltage, charging

and discharging every 120 seconds can run

continuously at 70% of the rated voltage, which can run continuously.

IV.Technical Description of Main Components

1. Dc charging part

(1)Constant current charging device is adopted;

(2) using oil-immersed charging transformer, the secondary voltage is 85kV , rated capacity of 30 kvA;

(3)Using 2DL-300 kV / 500 mA high voltage rectifier silicon stack,The reverse withstand voltage is greater than 300kV, the average current is greater than 0.5a, the high-voltage rectifier silicon pile is installed next to the charging transformer, the charging voltage polarity can be automatically reversed by the transmission mechanism.

(4)High-voltage rectifier silicon stack protection resistance using enameled resistance wire is tightly wound around the insulation tube;

(5)Using asymmetrical doubling charging method;

(6)During automatic control, the constant current charging device is within 10%~100% of the rated charging voltage range, the actual charging voltage and the setting voltage deviation are not more than ±1%, the charging voltage instability is not more than ±1%, and the charging voltage is adjustable. 1% accuracy

(7)DC resistance divider with 100 kV, 300MΩ oil-immersed metal film resistors, low-voltage arm resistance installed in the bottom of the divider, the low voltage arm voltage signal with shielded cable into the console.

(8)The automatic grounding switch USES the electromagnet to separate the grounding mechanism. When the test stops, the main capacitor can be automatically grounded by protective resistance.

(9),Constant current charging inductance, capacitance in the console, charging transformer, high voltage rectifier silicon reactor, protection resistance, automatic grounding switch and insulation pillar are installed on a mobile chassis.

2.The Ontology part

 (1) The main structure adopts a four-column structure. The steel body bracket consisting of four flanges is connected with two capacitors in parallel, forming a stable structure consisting of 1 level, and the main equipment is 15stages, forming a combined tower structure. Level stacking, easy to disassemble and test, and stable overall structure;

(2) The main body adopts asymmetric constant current charging mode, constant current voltage regulation, continuously adjustable from zero to set voltage, and the charging power supply is automatically turned off at the instant of ignition and discharge, and the rated voltage of each stage is 200kV;

(3) 15-stage tower structure with body insulation pillars. Each stage includes 2 MWF100-3.0 iron casing oil-immersed pulse capacitors, charging resistors, wave head resistance, wave tail resistance and ignition ball gap, etc.

All synchro discharge balls are housed in a closed insulation, which can be manually adjusted by the console to automatically adjust the ball gap and provide clean air for drying;

(4) a single pulse capacitor is 3 ± 0.05 mF, dc voltage ±100 kV, capacitor inductor £0.2 mH, oil-immersed insulation composite membrane, capacitor under normal working condition and working environment, the capacitor for casing to withstand vertical tensile 15 kg, at the same time to ensure no damage and leakage of oil;

(5) The wave head (front) resistance and the wave tail resistance are both plate-shaped and non-inductive, and the self-inductance is less than or equal to 2.5mH. The purpose of reducing the inductance is to increase the load capacity. For a large-capacity load, This item can be used to increase the load by using a suitable combination of externally applied modulating capacitors and modulating resistors.) The joints are spring-loaded;

(6) Wave header (formerly), wave tail resistance bracket by four resistors in parallel, wave head (front), equal to the length of the tail resistor can be generic, and each one has stored excess modulated wave resistance the short-circuit the position of the lever; short-circuit rod connectors facilitate the generator series run;

(7) Full set

7.1  lightning wave head resistance;         4 sets

7.2  wave tail resistance                    4 sets

7.3  charging resistors (1 spare)             1 set

Load capacitance (with one moving base, capacitors can be connected in parallel)  200kV/2000pF                              2sets

200kV/4000pF                              2sets

  Cutoff loop damping:Braiding resistance 60Ω(10W,20W  have a tap)1set

Braiding resistance 150Ω(60W have a tap)                  1set

 Wave-modulated inductor(200μH,400μH)                1 set

  Support resistance  200Ω,300Ω,400Ω(With mobile stand) Each one

Our main products are Insulation Oil Tester, Cable Fault Locator, Power Quality Analyzer, High Voltage Generator, High Voltage Capacitor, Testing Transformer and so on.