GDYT-5/50 5kVA/50kV PD Free Test System for Lightning Arresters

Min.Order: 1

Product origin: Wuhan, Hubei, China

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US$ 13000 ~ 18000

Description

GDYT-5/50 5kVA/50kV PD Free Test System for Lightning Arresters

It 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 widely used in electrical manufacturing, power operation departments, research institutes and universities.

I. GDYT System 5kVA/50kV composition

Hipot Test Control Table GDYD-5/50
PD-free Gas type transformer YDQW-5/50
Coupling capacitor TAWF-50kV
Protective resistor GR50kV
Isolation filter LBQ-5kVA
Partial discharge detector
Other accessories

Hipot control Unit (GDYD-5/50) 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-5kVA) 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

Power supply:220V±10%,50Hz
Rated Capacity: 5kVA
Output Voltage: 50kV, current: 100mA
Input Voltage: 200V, current: 25A
Short-circuit impedance: <18%
Operation time: 30mins@100% rated voltage and current.

Continuous working@ 2/3 rated voltage and current.

Wave form distortion rate:<3% when voltage regulator input voltage distortion rate <3%.
PD value:≤5pC @ 100% rated voltage

IV. Specifications for each parts

Control Unit

Features

Digital display meters mounted on the panel.
Monitoring HV side voltage, HV side current, LV side current and indicator of zero, power, working start, timing.
Over-current protection, zero-starting protection,sound and light alarm.
With new type time relay, time rang is more wider (1S ~ 99H).
Using the latest current relay, more accurate and reliable.
Light weight, small size, easy to move.

Specifications

Power: AC220V±10%,50Hz
Capacity: 5kVA
Output voltage: AC 0-200V
Rated output current: 25A
Rated current rectified range:0-25A
HV voltmeter range: 0-60kV

Accuracy: 1.5% of the reading±2digit(F.S)

HV ammeter range: 0-80mA

Accuracy: 1.5% of the reading±2digit(F.S)

LV ammeter range: 0-25A

Accuracy: 2.0% of the reading±2digit(F.S)

Timing range:1s-99h
Weight: 18kg
Dimension: 440mm (L)*340mm (W)*240mm (H)

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

Rated capacity: 5kVA
Input voltage: 0-200V
Input current: AC 0-25A
Output voltage: AC 0-50kV
Output current: AC 100mA
Voltage accuracy: AC 1.5%
PC value on rated voltage: ≤5pc
Voltage distortion factor: <3%
Insulation dielectric: SF₆ gas
Weight: about 50kg.

Coupling capacitor TAWF-50

Rated frequency: 50Hz
Standard capacitance: 800pF±10%
Rated voltage: 50kV
Voltage ratio: 1000/1
Dielectric loss: <0.5%
Measurement accuracy: 1%
Permitted operation time: same with testing transformer
PD value: ≤8pc on 100% of rated voltage, ≤5pc on 80% of rated voltage.

Protective resistor GR50kV

Rated frequency: 50Hz
Rated voltage: 50kV
Resistance: 5kohm
Rated current: 0.5A

Permitted operation time: same with testing transformer

Isolation filter LBQ-5kVA

With L-C filter loop circuit, and built-in filter compensation device
Rated capacity: 5kVA
Rated voltage: 200V
Rated current: 25A
No-load consumption: ≤5%
Impedance voltage: ≤5%
Attenuation: 40kHz-100kHz ≥40dB

100kHz-1.5Mhz ≥60dB

Permitted operation time: same with testing transformer

PD Detector

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

Ambient temperature: 0-40ºC±2ºC.
Relative humidity: ≤80%
Power supply: 220V±10%,50HZ.
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
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

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

Amplifier gain adjustment

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

Time windows

Width of window, adjustable 15^o-150^o
Window position, adjustable 0^o-170^o
Two windows can be opened simultaneously or separately.

Discharge meter

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

Ellipse time base

Frequency: 50Hz and arbitrary frequency
Elliptic display color is yellow
Elliptic rotation: each gear is 30°, 180 ° rotation can be made.
Display: ellipse - straight line
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