Lightning Impulse Voltage Test System

Lightning Impulse Voltage Test System; system is designed to be applied to transformers in the form of lightning pulses in transformer tests in accordance with IEC 60060-1 standard.
This system consists of control unit, oscilloscope, computer and program and lightning pulse generator.

Lightning Impulse Voltage Test System

This device consists of main body, clipping cutting wave, voltage divider, axial wave resistance (inductance) and fully automatic control and measurement system.

TECHNICAL PARAMETERS

Pulse Generator

Lightning rated voltage: ± 300 kV
Rated capacity: 30 kJ
Level electric capacity: 2uF, 100kV (HRMWF-2×50kV-4.0μF)
Level voltage: ±100kV (DC) (2x50kV)
Progression / level energy: 3 / 10kJ
Output wave shapes: ±1.2/50μs standard lightning impulse voltage full wave
Wave time: 1.2±30% μs
Wave rear time: 50±20% μs
Over swing: < 5%
The efficiency: > 90 %
Synchronization harms the pace: < 1%
Dimension: 2200×1500×1700 (H: Overall height) mm
Weight: 400kg.

Main Structure of Equipment

Rectification charging source (and impact main body integration)

Model Number： MLT-LGR-100/50
Rated voltage ： Un = 100kV DC
Nominal current： In = 50mA (Under rated voltage)
Voltage control: 0～100% Un
Polarity inversion： the manual transformation high voltage direction
Input voltage： 220V Single-phase voltage
Supply frequency： 50/60 Hz
Power source consumption： approximately 5kVA
Dimension: 1000×600×1100 (H: height) mm

Damping Voltage divider

Model Number：MLT-CR-300/500
Rated voltage： 300kV
Fixed electric capacity：500pF
Electric capacity pitch number： 1
Each electric capacity： 500pF（HRMWF300-500 Pulse capacitor）
Square-wave response：
Partial response time: < 100 ns
Over swing is < 10 %（Satisfies the IEC 60060-1 & IEC 60060-2 standard ）

impulse-wave type	Partial response time Tα ≤ ns	Over swingβ≤ %	Settling time Ts≤	Scale division factor uncertainty Kε≤ %
Lightning impulse	70	5	T1	1

Differential voltage ratio： 1000
Differential voltage uncertainty： < 1%
Dimension: R1000×1200 (H: Overall height) mm

Measurement equipment

Model Number: MLT-DIMS1000B digital impulse measurement system
Peak-to-peak value: MLT (IPM) 23 impulse peak voltmeter
Input range: 100V ~ 1600V
Uncertainty: < 1 %
Scope: TDS1012B digital oscilloscope
Highest sampling rate 1.0GS/s,
the band width is bigger than 100MHz, the resolution 8 bit
Record length 2.5kbyte, 2 channels
Waveform analysis: 19 inch computerized control system
Impulse measurement special-purpose software package：

Impact waveform parameter computation and demonstration
Profile comparison function
Profile enlargement, reduction and translation
Profile memory and transfer
Profile reports the compilation

Equipment List

No.	Product range	Model Number	Unit	Quantity
1	Lightning impulse voltage generator (including direct-current charging power source)	MT-SGSC-300/30 MT-LGR-100/50	set	1
2	discharge grounding rods	MT-R	set	1
3	Damping voltage divider	MT-CR-300/500	set	1
4	Impulse generator control system	MTCS-2000A	set	1
5	Impulse generator measurement system	MT-DIMS1000B	set	1
6	Impulse peak-reading voltmeter	MT-23	set	1

GENERAL INFORMATION

What is Pulse Voltage?

Impulse Voltage; It is a single-pole, high-frequency voltage type that rapidly rises to a peak value and then quickly drops to zero.

Impulse Voltage Test

Lightning impact tests are carried out in order to determine to what extent high voltage devices are affected by lightning. In order to carry out these tests, impulse voltages are produced in the laboratory environment. In other words, impulse voltage is a type of voltage created in a laboratory environment to simulate high voltage.