HVHIPOT 5kVA 50kV Partial Discharge Test System

• Ambient temperature: -15ºC~+40ºC
• Maximum temperature difference: ≤25ºC
• Relative humidity: ≤90%(20ºC)
• Anti-earthquake ability: ≤8 grade
• The ground level acceleration: 3.0m/s2, Ground vertical acceleration:1.5m/s2
• Sine wave distortion rate: <3%
• Model NO.: GDYT-5kVA/50kV
• Ground resistance: <0.5Ω
• Height: ≤3000m
• Installation place: Indoor
• Transport Package: Wooden Case
• Specification: ISO, SGS
• Trademark: HV Hipot
• Origin: Wuhan China
• HS Code: 9030899090
• Production Capacity: 2000PCS/Year

Product Description

I. General infomation

GDYT series Partial Discharge Test System is used for testing insulation level of various insulation materials, insulation structure and electrical products.It is also considered as PD power frequency source for transformers, CT/PTs, HV circuit breakers, coupling capacitors, bushings and other power equipment.
 

II. Working conditions
 

Ambient temperature	-15ºC~+40ºC
Maximum temperature difference	≤25ºC
Relative humidity	≤90%(20ºC)
Anti-earthquake ability	≤8 grade
The ground level acceleration	3.0m/s2, Ground vertical acceleration:1.5m/s2
Sine wave distortion rate	<3%
Ground resistance	<0.5Ω
Height	≤3000m
Installation place	indoor

 

III. GDYT System 5kVA/50kV composition
 

Name		Quantity
AC Hipot Test control unit  (GDYD-5KVA/50KV)		1 piece
PD-free Gas type transformer (YDQW-5KVA/50KV)		1 piece
Isolation Filtering Device		1 piece
Coupling Capacitor		1 piece
PD-free Hipot Protective resistor		1 piece
Partial Discharge Detector (GDJF-2008)		1 piece
Other accessories

IV. Techinical Specifications
 

Rated output capacity	0~5kVA (PD-free discharging test).
Rated output voltage	0~50kV. (PD-free discharging test)
Partial discharge:	PD≤5pc at 100% rated voltage.
Waveform distortion	when waveform distortion of input voltage <3%,waveform distortion of instrument itself ≤3%.

1. Digital AC Hipot Test control unit for partial discharge test set

Input voltage	AC220V±10%  60Hz±1
Output voltage	0~50 kV
Output capacity	0~5 kVA
High voltage current	0~100mA
Low voltage current	0~25A
Timing range	0-999S
Ambient temperature	-20ºC~50ºC
Voltage accuracy	≤1.5% ±1 digit(F.S)
Current accuracy	≤1.5% ±1 digit (F.S)

2. SF6 gas testing transformer

Rated capacity	0~5kVA
Input voltage	220V±10%
Output voltage	0~50kV
Output current	0~100mA
Voltage accuracy	AC 1.5%
Power distortion	<3%
The PD value at rated voltage	≤5pC
Insulating medium	SF6 gas
Weight	35KG

3. Isolation Filter Device

Rated voltage	220V±10%
Rated current	25A
Rated capacity	5kVA
No-load loss	≤5%
Impedance voltage	≤5%
Working time	as same as testing transformer
Attenuation effect	10KHZ-100KHZ≥ 20db                       100KHZ-30MKZ≥ 60db

4. Coupling Capacitor     

Rated voltage	0~50kV
Rated capacitance	800pF
Dielectric loss	≤0.2%
Test accuracy	<±1%
Insulation level	is normal at 1min under 120% rated voltage
Standard dividing rate	1000: 1
PD	at 100% rated voltage ≤3pC,at 80% rated voltage ≤2pC
Structure	Insulated shell oil paper capacitor structure: is composed of top cover, voltage-sharing ring, capacitor body, moving base, low voltage arm etc..
Working time	As same as transformer.

5. Protective Resistor

Rated voltage	0~50kV
Rated current	0.5A
Standard resistance	5kΩ
Working time	as same as transformer
Temperature rise	H grade (135ºC)PD: at 100% rated voltage ≤3pC, at 80% rated voltage ≤2pC
Resistor adopts enamel wire which is wound in the epoxy resin plate, with the honeycomb structure, make the heat emitted by the electric wire and air exchanging sufficiently, reduce temperature of the resistance, ensure the strength of resistor parent material isn't reduced when heated. Connecting the two ends with the transformer and the divider.

6. Partial Discharge Detector 

Ambient temperature	0-40ºC±2ºC
Relative humidity	≤80%
Power supply	220V±10%, 50HZ
Earthing requirements	Earthing resistance <1Ω
No violent vibration and mechanical shock
The device should be placed in the environment with no dust and corrosive, good ventilation. It should not be interfered by strong electromagnetic.

Capacitance range to be tested 6PF-250μF
Testing sensitivity (shown in Table.1)

Input unit No.	Tuning capacitance	Unit	Sensitivity(pC) (Unsymmetrical 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	mF	0.3
7	0.025-0.1-0.4	mF	0.5
8	0.1-0.4-1.5	mF	1
9	0.4-1.5-6.0	mF	1.5
10	1.5-6.0-25	mF	2.5
11	6.0-25-60	mF	5
12	25-60-250	mF	10
7R	Resistance

                                                  Table 1

Principle Diagram