GDYT-3/5 HV Partial Discharge Testing System 3kVA/5kV for CT

• After-sales Service: Yes
• Warranty: 1 year
• Power supply: 220V 50Hz
• Rated Capacity: 3kVA
• Output Voltage: 5kV
• Current: 600mA
• Model NO.: GDYT-3/5
• Transport Package: Standard Export Wooden Box
• Specification: ISO, SGS
• Trademark: HV Hipot
• Origin: Wuhan, China
• Production Capacity: 5000set/Year

Product Description

GDYT-3/5 HV Partial Discharge Testing System 3kVA/5kV


GDYT-3/5 Partial Discharge Test System is mainly used for testing frequency voltage insulation level of various insulation materials, insulation structure and electrical products, also as partial discharge frequency testing power supply for testing object such as transformer, mutual inductor and lightning arresters. It is widely used in electrical manufacturing, power operation departments, research institutes and universities.

I. GDYT System 3kVA/5kV composition
 

1. Hipot Test Control Table GDYD-D-3/5         
2. PD-free Gas type transformer YDQW-3kVA/5kV    
3. Coupling capacitor  TAWF-5kV/800pF         
4. Protective resistor  GR5kV/5kΩ            
5. Isolation filter  LBQ-3kVA/200V                     
6. Partial discharge detector GDJF-2008
7. Other accessories          

    

Hipot control Unit (GDYD-3/5) and PD-free testing transformer are controlling and voltage boosting for test object which boosted to the rated voltage.

Partial discharge detector is detecting and displaying partial discharge capacity.

Isolation filter(LBQ-3kVA) is device of anti-interference caused by power supply.

Coupling Capacitor is transmitting partial discharge signal to partial discharge detector.


II. System principle diagram


K1: Circuit breaker
TY: Voltage regulator
GK: Compensation reactor
LBQ: Anti-interference filter
TPU: Fast Over-voltage protection device(Optional)
B1: Testing transformer
R: Protective resistor
KZ: Control table
C1&C2: Capacitive divider with Coupling capacitor




III. System Specifications
 

1. Power supply: 220V±10%,50Hz
2. Rated Capacity: 3kVA                                         
3. Output Voltage: 5kV, current: 600mA                                 
4. Short-circuit impedance: <18%
5. Operation time: 30mins@100% rated voltage and current.

             Continuous working@ 2/3 rated voltage and current.

1. Wave form distortion rate:<3% when voltage regulator input voltage distortion rate <3%.
2. PD value:≤10pC @ 100% rated voltage

           

IV. Specifications for each parts
 

1. Control Unit

Features
 

1. Digital display meters mounted on the panel.

1. Monitoring HV side voltage, HV side current, LV side current and indicator of zero, power, working start, timing.
2. Over-current protection, zero-starting protection,sound and light alarm.
3. With new type time relay, time range is more wider (1S ~ 99H).
4. Using the latest current relay, more accurate and reliable.
5. With wheels, easy to move.

Specifications
 

1. Power: AC220V±10%,50Hz
2. Capacity: 3kVA
3. Output voltage: AC 0-200V
4. Rated output current: 15A
5. Rated current rectified range:0-15A
6. HV voltmeter range: 0-5kV

    Accuracy: 1.5% of the reading±1digit(F.S)

1. HV ammeter range:0-600mA

    Accuracy: 1.5% of the reading±1 digit(F.S)

1. LV ammeter range: 0-15A

    Accuracy: 2.0% of the reading±1 digit(F.S)

1. Timing range:1s-99h
2. Weight: 20kg
3. Dimension: 460mm (L)*360mm (W)*510mm (H)

2. PD-free Gas testing transformer (HV unit) specifications
 

1. Rated capacity: 3kVA
2. Input voltage: 0-200V
3. Input current: AC 0-15A
4. Output voltage: AC 0-5kV
5. Output current: AC 600mA
6. Voltage accuracy: AC 1.5%

1. PC value on rated voltage: ≤10pc                          

1. Voltage distortion factor: <3%
2. Insulation dielectric: SF₆ gas
3. Weight: about 20kg.

 

1. Coupling capacitor TAWF-3kVA/800pF

 

1. Rated frequency: 50Hz
2. Standard capacitance: 800pF±10%
3. Rated voltage: 3kV
4. Voltage ratio: 1000/1
5. Dielectric loss: <0.5%
6. Measurement accuracy: 1%
7. Permitted operation time: same with testing transformer
8. PD value: ≤10pc on 100% of rated voltage

 

1. Protective resistor GR-5kV/5kΩ

 

1. Rated frequency: 50Hz
2. Rated voltage: 5kV
3. Resistance: 5kΩ
4. Rated current: 1A

1. Permitted operation time: same with testing transformer

 

1. Isolation filter LBQ-3kVA/200V

 

1. With L-C filter loop circuit, and built-in filter compensation device
2. Rated capacity: 3kVA
3. Rated voltage: 200V
4. Rated current:15A
5. Frequency: 50Hz
6. Attenuation: 40kHz-100kHz ≥40dB

             100kHz-1.5Mhz ≥60dB

1. Permitted operation time: same with testing transformer
2. Impedance voltage: ≤5%
3. Attenuation: 40kHz-100kHz ≥40dB

             100kHz-1.5Mhz ≥60dB

1. Permitted operation time: same with testing transformer

 

1. PD Detector(1~4 channels optional)

GDJF-2008 Partial Discharge Detector is measuring partial discharge for the products  such as transformers, mutual inductors, HV switches, zinc monoxide arresters and power cables. It also can make type tests and monitor insulation operation.
This type has the advantages of high sensitivity, wide range of capacitance, being well equipped for input unit impedance detecting and more variants of frequency bands ( 9 in all). After proper setting, the discharge impulse amount can be read directly. The indicating and digital meters are shown simultaneously.
This detector is widely applied in power stations, manufacturers and institutions.
Use Condition
 

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

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		0.5

Table 1

Amplifier band
 

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

Amplifier gain adjustment
 

1. Coarse control - there are 6 gears for coarse tuning, the gain of each gear is 20±1db
2. Fine control ≥ 20 db

Time windows
 

1. Width of window, adjustable 15°-150°
2. Window position, adjustable 0°-170°
3. Two windows can be opened simultaneously or separately.

Discharge meter
 

1. Digital display
2. PD display: LED 3½ digits
3. 0-100.0    limit of error <±3% (full scale)

Ellipse time base
 

1. Frequency: 50Hz and arbitrary frequency
2. Elliptic display color is yellow
3. Elliptic rotation: each gear is 30°, 180 ° rotation can be made.
4. Display: ellipse - straight line
5. High frequency time base  elliptical input voltage less than 220 V, intake power < 1 VA

Waveform lock

Lock required waveform of any time to facilitate observation and analysis

Testing Voltage meter
 

1. Range: 100KV (Can be expanded)
2. Display 31/2 digital voltage meter
3. Accuracy: better than ±2% (full scale)

Inside, outside the zero mark function
Dimensions: 450×450×190 mm
Weight: about 16kg