50kVA/100kv Pd Free Test System

• After-sales Service: 1 Year
• Warranty: 1 Year
• Type: Pd Free Test System
• Accuracy Grade: 0.5
• Display: Digital
• Control: Computer Control
• Model NO.: ZH
• Power Source: AC220V
• Rated Capacity: 50kVA
• Output Voltage: 0-400V, 0-100kv Adjustable
• Output Voltage Frequency: 50-300Hz
• Phase Number: Single
• Short-Circuit Impedance: <5%
• Noise: <65 dB
• No-Load Current: <10%
• Pd Amount at Rated Voltage: <5PC
• Trademark: zhenhuan
• Origin: China
• Production Capacity: 5000PCS/Year

Product Description

50kVA/100kV  PD Free Test System

I DescriptionThis machine is suitable for power frequency withstand voltage and partial discharge, frequency doubling induction withstand voltage and partial discharge test of high-voltage voltage transformers and current transformers of 33 KV and below.
II Main configuration

Item	Model	Qty.	Remark
Automatic power frequency and frequency doubling PDF test system	50/100	1	The system comes with square wave generator and impedance unit.
PDF test transformer	50KVA/100KV	1
Digital Partial Discharge Tester	124	1
PDF frequency conversion power supply	50KVA	1
Coupling capacitor	100KV	1
Protection resistor	100KV-5KΩ	1

50/100 automatic power frequency and frequency multiplication PDF test system diagram

III Main technical data

1. Automatic power frequency and frequency multiplication PDF test system diagram

Rated capacity	50kVA
Input voltage	3P, three-wire+ground, 380V±10%, 50Hz/60Hz±5Hz
Output voltage	0-400V, 0-100kV adjustable
Output voltage frequency	50-300Hz
Control	Automatic
Phase number	Single
Short-circuit impedance	<5%
Noise	<65 dB
No-load current	<10%
PD amount at rated voltage	<5pC

1. Transformer Insulation Level

Transformer winding	Rated short-term power frequency withstand voltage kV  (root mean square)
HV winding	Power frequency 100 (5 min)
LV winding	3 (1 min)

 

1. Automatic PDF control table

Rated voltage	AC 380V
Capacitance	50KVA
Input voltage	0-400V
Input frequency	50-300Hz
Voltage accuracy	±0.5
Current accuracy	±0.5
Operation method	Automatic, manual
Data preservation	1000 group
Password	Multi-level permission settings
Weight	10kg
Six protections
Low voltage protection	Low current protection
High voltage protection	High current protection
Over voltage protection	High Voltage Flash-over Protection
Software operation interface
Operation information prompt	During automatic test, 5-stage test can be set
Generate reports automatically	Protection status prompt
Voltage and time graph	Primary circuit working status display
Power frequency withstand voltage and induction withstand voltage can be switched freely

 

1. Digital Partial Discharge Tester

1. Capacitance range of testable products: 6PF--250μF
2. Detection sensitivity
3. Amplifier Band

NO.	Tuning capacitor	Unit	Sensitivity(pC)(asymmetric circuit)
1	6-25-100	pF	0.02
2	25-100-400	pF	0.04
3	100-400-1500	pF	0.06
4	400-1500-6000	pF	0.1
5	1500-6000-25000	pF	0.2
6	0.006-0.025-0.1	pF	0.3
7	0.025-0.1-0.4	pF	0.5
8	0.1-0.4-1.5	pF	1
9	0.4-1.5-6.0	pF	1.5
10	1.5-6.0-25	pF	2.5
11	6.0-25-60	pF	5
12	25-60-250	pF	10
7R	Resistor		0.5

1. Low-end: 10KHZ, 20KHZ, 40KHZ(optional)
2. High-end: 80KHZ, 200KHZ, 300KHZ(optional)

 

1. Amplifier Gain Adjust

Coarse adjustment six gears, gain between gears 20±1 db; fine adjustment range ≥ 20db
 

1. Time Window:

1. Window width: adjustable range 15°~150°;
2. Window position: Each window can be rotated 0°~170°;
3. The two time windows can be opened separately or simultaneously.
 

1. Discharge meter:

Digital meter head: Displayed by 3½ LED digital meter
0-100.0 error <±5% (in full scale)
 

1. Elliptical time base:

Frequency 50HZ, 100HZ, 150HZ, 200HZ, 400HZ.
Elliptical rotation: 150° rotation is possible with 30° as the first gear.
Display mode: ellipse - straight line - sine.
 

1. Test voltmeter:

Range: 100KV (expandable)
Display: 3½ digital voltmeter indication
Accuracy: better than ±5% (on full scale)
 

1. It has the function of zero mark, which is beneficial to the identification of partial discharge
2.  Dimension: 500 x 500 x 210 mm, weight: 16 kg

 

1. PDF test transformer

1. Type: oil immersed
2. Phase number: single
3. Rated capacity: 50kVA
4. Input rated voltage: 400V

Input rated current: 125A

1. Output voltage: 100kV

Output rated current: 500mA

1. No-load current: <5%
2. Waveform distortion rate: ≤3%
3. Measuring winding voltage: 100V Measuring voltage ratio: 1:1000
4. Over-current capability: Under the condition of 150% (0.75) rated current for 300S, the transformer winding of the over-current test will not cause thermal damage and winding deformation
5. Over-voltage capability: 110% UH, over-voltage under 60S will not cause insulation damage to the test transformer, and the waveform distortion rate ≤5%
6. Insulation level: low-voltage end power frequency resistance 5kV/min
7. Dielectric loss: ≤0.5%
8. Partial discharge: less than 5PC at 100% UH, less than 3PC at 80% UH

 

1. PDF frequency conversion power supply

1. Rated power: 50kVA
2. Input voltage: 380V±10%,50Hz/60Hz±5Hz
3. Output voltage: 0-400V
4. Output voltage frequency: 45-300Hz(adjustable)

 

1. PD Free divider (also coupling capacitor)

1. Capacity: 700pF
2. Measure accuracy: 1%
3. Max. Measure voltage: 100KV
4. Manufactured with epoxy glass fiber tube, coated with hydrophobic insulating paint
5. All high-voltage components are treated with special technology, and there is no partial discharge phenomenon

 

1. PDF protection resistor

1. Model No. 100KV-5KΩ
2. Rated frequency: 60HZ
3. Rated voltage: 100KV
4. Rated current: 0.1A
5. Nominal resistance: 5KΩ
6. Heat resistance grade: F grade
7. Partial discharge: <3pC under 100% rated voltage, <2pC under 80% rated voltage
8. Temperature rise: under 100% rated current, the surface temperature of the resistance in continuous operation is less than 80K
9. Running time: same as transformer

IV Feature

1. Pressure regulating control unit

1. Industrial embedded PC, using high-performance hardware and software control; touch screen operation.
2. The console adopts automatic control and manual control, and the two functions are managed independently and hierarchically without interfering with each other;
3. All test parameters of this test system can be arbitrarily set according to requirements, the test speed is smooth, and the displayed data is clear and intuitive;
4. All test parameters can be set in advance, which can achieve a series of functions of accurate memory, storage and reset of high-voltage voltage discharge breakdown voltage; automatic scanning time setting, automatic storage of detailed records of time, voltage, current, etc. during the electrical aging process, which is convenient for users to view ;
5. The test system is equipped with a cumulative timing function, and can independently start, pause and clear;
6. The combination of hardware and software anti-jamming technology has stable performance and strong anti-jamming.
7. It has power frequency/frequency doubling output capability, and can be used for both power frequency PDF withstand voltage test and frequency doubling PDF withstand voltage test. It can also be used as a frequency multiplier PDF power supply.

1. PD measurement unit

1. After the partial discharge signal is digitally processed, it is displayed on the LCD.
2. Free choice of ellipse, straight line, sine display mode
3. Adopt digital windowing technology to avoid the influence of interference on measurement.
4. Window opening in any phase, single window, double window optional, ellipse 150 degree rotation.
5. The current discharge map can be frozen and saved, and the partial discharge pulse can be observed and analyzed statically.