Insulation cardboard voltage breakdown tester

Vn=150～300kVk=3；
It can be assembled into a DC high-voltage test device, which can measure high-voltage DC leakage current

When the pressure is low, the value of k can be higher; The following lists different test voltages Vn

Gas insulation~60PF/m;
K - Safety factor;

Rod shaped or suspended insulators with a thickness of tens of micrometers;
When conducting capacitance tests or DC high-voltage leakage tests, after the test is completed
Relative humidity: ≤ 85% (when the ambient temperature is 25 ℃);

Precautions
Graded casing 100-1000PF;
.

Electricity or power outage;
Or discharge the high voltage end of the capacitor to ground to avoid the potential remaining in the capacitor
In an environment without chemical gases and vapors;
Power frequency high-voltage complete testing equipment
Divide labor and clarify the methods of communication between each other. And there is a dedicated person to supervise on-site safety and observation
If any of the following abnormal situations are found during the boost or withstand voltage test, immediate action should be taken
Series voltage 400 V insulation method oil immersed type
Is the regulator adjusted to the "zero" position;
schematic diagram
The coupling. The overall structure of the product is compact, highly versatile, and easy to use and carry,
Pn=kVn2WCt10-9

Our company implements the "three guarantees" for all products, and welcomes users to choose our products
Rotate the regulator handle clockwise at a constant speed to increase the pressure, and pay close attention to the instrument pointer
After the voltage regulator is lowered to zero and the power is cut off, the test sample should be discharged with a discharge rod
Instrument voltage 100V, transformation ratio 1500:1
Rated input voltage 400 V Rated input current 37.5 A
Rated input voltage 400 V Rated input current 75 A

50Hz

Rated capacity 30 KVA, no-load current 1.3 A
The formula for determining the nominal test transformer capacity Pn is:
Product Overview
In situations where rainwater does not infiltrate.
At this time, return the voltage regulator to zero and cut off the power before testing

The YD series power frequency high voltage complete testing equipment produced by our company is a new type of high voltage
Connect the power, the green indicator light will turn on. Press the start button, and the red indicator light will turn on,
30KVA/300KV

The high-voltage winding is coaxially wound on the iron core to reduce leakage flux and increase the distance between windings

Instrument voltage 100V, transformation ratio 1500:1
In the formula: Pn - nominal test transformer capacity (kVA);

Capacity selection of test transformer
The pointer of the voltmeter swings greatly; ② Discovering the odor and smoking phenomenon of burnt insulation;
Capacitors, silicon stacks, and high-voltage DC microamperes with the same voltage level and capacity
Rated output voltage AC 150 KV Rated output current 100mA

Rated capacity 15 KVA, no-load current 1.3 A
In the experiment, if the test sample short circuits or breaks down due to a fault, the overcurrent relay in the control box
The selected safety factor k value is for reference:

③ There is abnormal sound inside the tested object.
Insulation method: Oil immersed
Vn=50～100kV k=4；
Testing equipment, this series of products adopts a single frame core structure, with primary winding and
Product model: 15KVA/150KV, frequency: 50Hz
When conducting high-voltage tests, it is necessary for 2 or more personnel to participate and clearly perform the necessary tasks
Insulation performance is an essential testing instrument for the detection and preventive testing of power equipment
Cut off the power and disconnect the test leads.
Show and test the condition of the sample;
It should depend on the type of equipment. The typical data is as follows:
Technical Requirements
attachment
Ct - capacitance of the test sample (PF).
1 copy of product qualification certificate;
After the experiment is completed, the voltage should be quickly reduced to zero and the stop button should be pressed
Our factory has provided valuable suggestions for improving the quality of our products.
The capacitance Ct of the tested equipment can be measured by an AC bridge. The changes in Ct are significant,
Rated output voltage AC 300 KV Rated output current 200mA

Enclosed substation with SF6 gas insulation of 100-10000PF.

Environmental temperature: -40 ℃ to 40 ℃;
Vn - the effective value of the rated output high voltage of the test transformer (kV);
Suitable for on-site testing of various high-voltage electrical equipment in power systems and power users
Vn≥1MVk=1。

Check the test status of the test sample;
Risk of electric shock.
Environmental requirements for the use of test transformers:
Vn≥300 k=2；
Input voltage: AC 220V 50Hz;
Lightweight high-voltage test transformers can be used for AC power frequency withstand voltage tests. If equipped with
Flow.
Before the experiment, check whether the wiring of each part is in good contact and inspect the control box
In non explosive gases;
Operation steps
Indicates that the transformer has been powered on and is waiting for voltage to increase;
Step down the voltage, cut off the power, stop the test, and investigate the cause before conducting the test again. ①

For different test voltages Vn, select an appropriate safety factor k and nominal test voltage
Power transformer>1000kVA 1000-10000PF;;

Connect the leads according to the wiring schematic and reliably ground the transformer and control box;
Technical parameters: Series excited transformer

Product model 30KVA/300KV frequency
Power transformer<1000kVA~1000PF;
Voltage transformer 200-500PF;
Transformers and control boxes should have reliable grounding;
Take out the product.
During the experiment, the boosting speed should not be too fast, and sudden full voltage turn-on is not allowed
W - angular frequency, W=2 π f, f is the frequency of the test power supply;
1 copy of user manual;