Supply of substation without electricity frequency test transformer | manufacturers | complete specifications | excellent quality

48000 CNY (6988.94USD)

Product parameters:

Voltage ratio: 1
Power phase: three-phase
Rated power: 2
Moisture way: open type
Cooling method: oil immersion from the cold type
Cooling form: liquid / oil type
Frequency characteristics: IF
Brand: Yu De
Winding form: Double winding
Core form: ring
Core shape: ring type
Outline structure: vertical
Efficiency (η): 4
Model: YD
Minimum number of packages: 1
Material Number: 3
Product Certification: 5

System equipment main technical indicators
(A), partial discharge detector
Key words: time base frequency, display mode, variable band measurement function.
1, time base frequency: frequency 50, 100, 150, 200, 400Hz fifth gear optional.
2, display: sub-ellipse, expansion, three straight lines, and can rotate 360 °.
3, variable band measurement function: integrated design, covering 10KHz ~ 300KHz, in line with the International Electrotechnical Commission (IEC60270) standards.

Technical Parameters:
1, can test the capacitance of the range of 6pF ~ 250uF
2, detection sensitivity and allowable current (see input unit)
3, oval scan time base
(1) Frequency 50 (inner), 100, 150, 200, 400 Hz
(2) rotation: 30 ° for a file, can be rotated 360 °
(3) work: oval - extended - straight line
(4) high frequency time base ellipse can be input voltage (10 ~ 250V) to adjust to normal size, the intake power <1 volt, and overload automatic protection device
4, the display unit
Using 124 × 104mm2 rectangular oscilloscope, with brightness and focus adjustment knob
5, the amplifier
(1) 3dB low frequency frequency fL: 10, 20, 40KHz optional
(2) 3dB high frequency frequency fH: 80, 200, 300KHz optional
(3) gain adjustment, coarse tune 6, the difference between the difference between the range of 20 ± 1dB, fine range> 20dB
(4) Positive and negative impulse response asymmetry <1dB
6, time window
(1) window width: adjustable, 50Hz under 15 ° ~ 150 °
(2) window position: each window can be rotated 0 ° ~ 170 °
(3) two time windows can be opened separately or simultaneously
7, pulse peak table
(1) Linear scale pointer type 0-100 error ± 5% (with full scale)
(2) Logarithmic scale pointer table 0-10-100 error ± 5% (with full scale)
(3) digital meter: to 3 and a half LED digital table shows 0-100 error: ± 3% (with full scale)
8, test voltmeter
(1) Range 100KV (with 100KV voltmeter resistance R)
(2) Display: 3 and a half digital voltmeter
(3) Error: ± 3%
9, zero standard system
(1) zero mark of the internal zero mark generator can change the polarity, and can be rotated 0 ~ 180 ° so that the voltage resistance R generated by the true zero standard polarity
(2) The zero mark is consistent with all elliptical scanning frequencies
10, structure
(1) volume of 530 × 550 × 220mm3
(2) Weight: about 22kG
11, power supply voltage
AC 220V (50Hz ± 10%)
12, the use of the environment
Ambient temperature -5 ~ +45 ℃, relative humidity ≤ 85% RH

(2) correction pulse generator
Model: JZF-10
Output Charge Count: 5 pC, 10 pC, 20 pC, 50 pC
Polarity: positive and negative alternately
Repetition frequency: 1.2kHz
Frequency range:> ± 100Hz
Pulse rise time: <60nS
Pulse falling edge time:> 100uS
Injection capacitance: 10pF Capacitance error Ec ≤ ± 4%
Square wave voltage amplitude error Eu ≤ ± 4% (50pC stalls)
Corrected charge error Eq = (Eu2 + Ec2) 1/2 ≤ ± 5%
Size: 160 × 125 × 50mm3
Weight: 0.5kg
Battery: 6F22 9V

(C), the input unit (detection impedance)
The input unit is an important unit that detects the discharge information in the discharge test circuit, also known as the detection impedance, and the input unit can meet the recommended partial discharge detection methods from IEC 170 to 7R, Parallel method, series method, balance method, etc.) The input unit adopts the double tuned input circuit of the high frequency transformer, the primary circuit is the LCR circuit, the primary inductance in the amplifier circuit amplifier and the test circuit equivalent Capacitor phase tuning.

Enter the order Yuan serial number	Tuning capacitor range	Sensitivity (PC) (Unbalanced circuit)	Allow current rms
			Unbalanced circuit	Balance circuit
3	100 ~ 400 ~ 1500PF	0.06	120mA	1A

(D), power frequency without halo test transformer
Model: YWDT-50/250
Rated capacity: 50kVA
Rated input voltage: 0.38kV Rated input current: 131.6A
Rated output voltage: 250kV Rated output current: 0.2A
Measuring winding voltage: 250V
Connection group: II0 Cooling method: ONAN
Allowed running time: 100% U _N,I_N Run for 60min
70% U_N,I_N continue to operate
Number of phases: single phase frequency: 50Hz
Partial discharge: 100% U _N ≤ 5PC
Product structure: vacuum cast epoxy cylinder type

(5), no PD protection resistor
The protection resistor is connected between the test transformer and the voltage dividing capacitor to limit the short circuit current during the flashover of the test product, to protect the test product and to test the transformer.
Structure for the insulation tube skeleton, wire winding, both ends are equipped with pressure ring.
Model: RD-250-0.2
Rated voltage: 250kV
Rated current: 0.2A
Resistance: 4kΩ
Running time: 1h
Temperature rise: rated conditions of operation, the resistance surface temperature rise is not greater than 55K.

(6), no partial discharge capacitor voltage divider (and coupling capacitor)
Model: FOF-250-400
Rated voltage: 250kV
High voltage arm capacity: 400pF
Nominal divider ratio: 1000: 1
Capacitor at rated voltage U _NCan be run continuously for 1 hour
Capacitor dielectric loss tangent: at 20 ° C_N, 0.9 - 1.1U _NNo more than 0.002
Capacitor short-time power frequency withstand voltage of 1.1U_N
Capacitor in the nominal value of 100% of the voltage under the partial discharge is not greater than 5PC
Dielectric loss: ≤0.5%
Measurement accuracy: ≤ ± 1%

(Seven), electric filter pressure regulator
1, electric column regulator (built in the electric filter regulator device)
Model: TEDG-50
Rated capacity: 50kVA
Rated voltage: Input: 0.38kV Output: 0-0.42kV
Rated current: Input: 131.6A Output: 119.0A
Number of phases: single phase frequency: 50Hz
Cooling method: dry from the cold
Waveform distortion rate: ≤3%

2, power isolation filter (built in the electric filter regulator device)
The device consists of triple electrostatic shielded high voltage isolation transformer and high quality low-pass filter, the partial discharge detector used in the band can guarantee a 60dB attenuation effect.
Rated capacity: 50kVA
Rated input voltage: 0.38kV Rated input current: 131.6A
Rated output voltage: 0.38kV Rated output current: 131.6A
Number of phases: single phase frequency: 50Hz
Attenuation characteristics: 10kHz-1MHz ≥ 20-60dB
Cooling method: natural cooling

(8), power frequency high voltage test console
Power frequency high voltage test console and voltage divider, column regulator and so on to form a complete set of test equipment control, measurement and protection system.Through the operation instruction to complete the test items under the conditions of all the test procedures, and test the test Voltage, current or other parameters, pressure delay can be adjusted in the range of 0-99hr time interval, supporting the instrument measurement accuracy error is less than ± 1%, the protection system can be high frequency power test overload, overcurrent, Short circuit, flashover and other abnormal conditions for effective protection.
Model: YXY-2003
Rated capacity: 50kVA Rated voltage: 380V

Fourth, the use of the entire equipment conditions
1, the use of regional altitude of not more than 1000m
2, ambient air temperature range of -25 ~ +45 ℃
3, the ambient air relative humidity should not be greater than 80% RH
4, does not contain chemical corrosive gases and steam
5, no conductive dust and explosion hazard
6, no severe vibration and shock
7, indoor use
8, the grounding screw on the box to be reliable grounding, grounding resistance of the ground is not greater than 1Ω
9, test cable recommended with no halo wire