Category 局放测试仪

LECOM PD-LSG1 便携式开关柜局放检测故障定位仪测试仪IPEC PD-SG1 Handh

LECOM PD-LSG1 便携式开关柜局放检测故障定位仪测试仪IPEC PD-SG1 Handh已关闭评论

便携式开关柜局放检测仪故障定位仪

LECOM PD-LSG1

更多信息，请点击查看：LECOM局放产品总览 summary 

       LECOM P-LSG系列局放测试仪是瑞士LECOM集团制造的中高压电气设备局部放电检测的专业设备，包括手持式和便携式局放检测仪故障定位仪。

       局部放电一般是由于绝缘体内部或绝缘表面局部电场特别集中引起的。通常这种放电表现为持续时间小于1us的脉冲。每一次局部放电对电气设备都会有一些影响，轻微的局部放电对电力设备绝缘的影响较小，绝缘强度下降较慢；而强烈的局部放电，则会使绝缘强度迅速下降。这是导致高压电力设备绝缘损坏的一个重要因素。因此，应采用专业的局放检测设备对运行中的电气设备进行检测，当局部放电超过一定程度时，应将该电气设备退出运行，进行检修或更换。

       LECOM PD-LSG1便携式局放检测仪，英国工厂生产，作为一款专业的具有双传感器的(partial discharge) PD局放检测仪，能检测中高压电气设备内部放电产生的TEV信号以及表面追踪产生的声学放电。双传感器包括：内置TEV传感器和内置超声波传感器。

       PD-LSG1在水平模式下，可以测量 (partial discharge) PD的大小和重复率，能探测开关柜内部局放引起的快速瞬时脉冲，当传感器紧靠开关柜的面板时，液晶屏将会显示局放活动的等级，TEV信号的强度。LED灯可以指示PD是否超出临界阈值。该检测仪的内置扬声器将PD活动解调至人耳能听见的频率，这样在检测时用户可以真切的听到放电声。PD-LSG1配套的耳机可以保证在噪杂的检测环境下，确保最大的灵敏度。有时被测的电气设备会产生类似于PD的高等级电气噪声并伴有瞬时脉冲，这时PD-LSG1配套的软件能识别典型的电气噪声并警告用户所记录的局放等级不是由PD源引起的。

       PD-LSG1在PRPD动力循环模式下，可以与电气设备动力循环同步系统显示PD的活动历程，并从背景噪声中甄别PD的强度。

       PD-LSG1在PD定位模式下，能探测10cm之内的任何表面局放信号进而开始追踪，这时，可以再次使用耳机，以确保最大的检测灵敏度。

       PD-LSG1在趋势模式下，屏幕以条形图绘出检测到的局放活动，并在最后突出显示该检测周期内所记录的最大局放等级。


一、特征利益：

  • PD-LSG1是瑞士LECOM集团根据电力和工业用户的需求设计的一款便携便携式，操作简单的局放检测仪、局放定位仪器。
  • PD-LSG1是中高压电气设备、开关柜局部放电检测的专业设备，便携式。
  • PD-LSG1 便携式局放检测仪、定位仪：具有PD水平模式，PRPD动力循环模式以及定位模式。双传感器。
  • 可以快速，准确的进行电气设备的绝缘状况的状态检测。
  • 在大故障发生前，提前检测到高中压设备的局放问题。在变电站投入使用前发现局放问题，确保人身安全。
  • 测量由PD产生的内部TEV信号，在LCD显示屏上以dB来指示PD的量级。
  • 在PRPD模式下，可以从背景噪声中甄别PD的强度，帮助使用者区分局放和背景噪声。
  • “定位”模式，可以精确定位PD发生的位置。在240微微秒的时间内，精确找到局放的源点。
  • “听”到局放的声音：超声波和TEV双传感器让使用者“听”到局放发生时的“声音”。

二、技术参数： 

  • TEV测量——容性耦合器（CC-TEV）
    测量范围：  0—80dBmV
    分辨率：   1dB
    精度：    ±1dB
  • 超声波测量——机载声（AA-超声波）
    测量范围：  -6dBuV至70dBμV
    分辨率：   1dB
    精度：    ±1dB
    传感器灵敏度： -65dB（0dB=1volt/μbar RMS SPL）
    传感器中心频率：40KHz
  • 电缆PD——高频（HFCT）
    测量范围：  0——2,000,000pC
    转换函数：  5.0V/A
    频率：    50kHz to 20MHz
  • 局放定位模式
    时间分辨率：  240 微微秒
    测量距离分辨率：80毫米
  • PRPD模式：
    频率：    50/60Hz
    LCD显示方式：  连续显示实时到无限
    线性范围:   Min 0 to 20mV, Max 0 to 14V
    dB 范围：   0 to 80 dBmV
  • 硬件：高强度铝外壳，橡胶保护套。
    背光LCD显示屏带LED指示灯。防尘防水按键
  • 操作温度：-5℃至55℃
    湿度：  0—90%RH
  • IP保护： 54
  • 尺寸：  210*90*65
  • 重量：  1.8公斤
  • 电源：  内置充电锂电池,12V, 4Ah
    续航时间：约12小时
    电池充电器：100-250V AC，50/60Hz， 12.6V，1.65A
    充电时间：4小时

PD-LSG1 ：Switchgear PD Detection & Location

About the PD-LSG1

PD-LSG1 has the following key features:

  • Ultrasonic detection of surface PD activity. Displayed on the LCD screen as dB reading, as well as audible signals through headphones. 
  • Measurement of TEV signals generated by internal PD. Displayed on the LCD screen as dB reading.
  • PRPD Mode for viewing PD pattern in power cycle, allowing for the recognition of noise
  • Precedence Mode for location of PD within the assets under test 

PD Detection

Partial discharge activity inside metal clad high voltage plant induces small voltage impulses (called Transient Earth Voltages) on the surface of the metal cladding. TEVs travel around the cladding surface to the outside of the switchgear panel where they can be picked up externally using CC-TEV transducers.

The PD-LSG1 is used to detect, verify and locate PD activity in switchgear. The unit offers both TEV detection for internal discharge and ultrasonic detection for surface tracking and corona.

The PD-LSG1 has three modes: Level Mode, used to detect presence of both TEV and ultrasonic activity;  Cycle Mode, Phase Resolved Partial Discharge Display (PRPD) enables the user to verify PD activity is genuine and not from electrical noise interference before taking further remedial action; Precedence Mode, dual sensor precedence allows users to pin-point the source of PD activity.

Advantages of the PD-LSG1

  • Detect MV and HV problems – before they occur
  • Personnel Safety Device  – ensure the substation is clear of PD before conducting work
  • Locate PD Source – precedence with 240 pico-second timing accurately locates PD within Switchgear
  • PRPD – PRPD display allows user to distinguish between PD and Noise
  • Hear the PD – only instrument available that allows the user to hear both ultrasonic and TEV PD activity

What’s in the box?

  • PD-LSG1
  • Headphones
  • Sync Transmitter
  • Function Tester
  • 2 x CC-TEV Sensors , 1 x AA-Ultrasonic Sensor, 1 x HFCT 
  • Hard wearing moulded protective Peli™ case (suitable for hold luggage)

Detailed Specifications

1. TEV Measurement – Capacitive Coupler (CC-TEV)

  • Measurement Range  0 to 80 dBmV
  • Resolution  1 dB
  • Accuracy ±1 dB

2. Ultrasonic Measurements – Airborne Acoustic (AA-Ultrasonic) 

  • Measurement Range -6dBuV to + 70 dBµV
  • Resolution 1 dB
  • Accuracy ±1 dB
  • Transducer Sensitivity -65dB (0dB = 1volt/µbar RMS SPL)
  • Transducer centre frequency 40 kHz

3. Cable PD – High Frequency CT (HFCT)

  • Measurement Range 0 to 2,000,000pC
  • Transfer Function 5.0V/A
  • Frequency 50kHz to 20 MHz

4. Precedence

  • Time resolution 240 pico-seconds
  • Distance resolution 80mm

5. Power Cycle mode

  • Frequency 50/60Hz
  • Display modes Live & Infinite Persistence
  • Linear Range Min 0 to 20mV, Max 0 to 14V
  • dB Range 0 to 80dBmV

6. Hardware

  • Enclosure Tough Aluminium case with rubber protective side panels 
  • Screen Back-lit LCD with precedence LEDs
  • Control Membrane keypad

7. Environmental

  • Operating Temp -5°C to 55°C
  • Humidity 0 – 90% RH non-condensing
  • IP Rating 54

8. Dimensions

  • Size 210 x 90 x 65
  • Weight 1.8kg

9. Power

  • Internal Battery Lithium Ion, 12V, 4Ah
  • Operating Time Approx. 12hours
  • Battery Charger 100- 250VAC 50/60Hz, 12.6V, 1.65A
  • Charge time 4 hours

LECOM PD-LSGS手持式开关柜局放检测仪测试仪IPEC PD LSG Handheld Sw

LECOM PD-LSGS手持式开关柜局放检测仪测试仪IPEC PD LSG Handheld Sw已关闭评论 ,

手持式开关柜局放检测仪
LECOM PD-LSGS

更多信息，请点击查看：LECOM局放产品总览 summary 

      瑞士LECOM集团新产品： PD-LSGS手持式局放检测仪，英国工厂生产，是一款具有双传感器的开关柜局放检测仪。
      该检测仪能检测开关柜内部放电产生的TEV信号以及表面追踪产生的声学放电。双传感器包括：内置TEV传感器和内置超声波传感器。
      在TEV模式下，PD-LSGS能探测开关柜内部局放引起的快速瞬时脉冲，当传感器紧靠开关柜的面板时，仪器的液晶屏将会显示局放活动的等级，LED灯可以指示PD是否超出临界阈值。
      该检测仪的内置扬声器将局放PD活动解调至人耳能听见的频率，这样，在检测时，用户可以真切的听到放电声。PD-LSGS配套的耳机可以保证在嘈杂的检测环境下具备最大的灵敏度。有时被测的电气设备会产生类似于PD的高等级电气噪声并伴有瞬时脉冲，这时PD-LSGS配套的软件能识别典型的电气噪声并警告用户所记录的局放等级不是由PD源引起的。
      PD-LSGS在超声波检测模式下，能探测任何表面局放，进而开始追踪，耳机可以再次被使用以确保最大的灵敏度。PD-LSGS在趋势模式下，屏幕以条形图绘出检测到的局放活动，并在最后突出显示该检测周期内所记录的最大局放等级。

一、特征利益：

  • PD-LSGS是中高压电气设备局部放电检测的专业设备，手持式。
  • PD-LSGS 手持式局放检测仪是一款具有双传感器的开关柜局放检测仪，具有TEV检测模式，超声波检测模式以及趋势模式。
  • 快速、准确的进行电气设备绝缘状况的检测。
  • PD-LSGS是瑞士LECOM集团根据电力和工业用户的需求设计的一款手持便携式，操作简单的局放检测仪器。英国工厂生产。
  • PD-LSGS适用于对大量的高压开关柜和电力电缆进行初步检查，通常测试时间在5-10秒即可以完成

二、技术参数：

  • TEV检测模式
    传感器：电容性
    测量范围：0—80dBmV
    分辨率：1dB
    精度：±1dB
  • 超声波检测模式
    测量范围：-6dBuV至70dBμV
    分辨率：1dB
    精度：±1dB
    传感器灵敏度：-65dB（0dB=1volt/μbar RMS SPL）
    传感器中心频率：40KHz
  • 操作温度：-5℃至55℃
    湿度：0—99%RH
  • 硬件：注塑外壳，OLED显示屏，防水防尘按键
    硬件接口：电源，耳机，外接声波天线
  • IP保护：54
  • 尺寸：190*90*65mm
  • 重量：300g
  • 电源：内置充电锂电池，3.75V，2.2Ah
    续航时间：约12小时
    电池充电：90-264V AC，5V，2.6A
    频率：47-63Hz
    充电时间：2小时


Handheld Switchgear PD Detector



About the PD-LSGS
PD-LSGS has the following key features:

  • Measurement of TEV signals generated by internal PD
  • Ultrasonic detection of surface PD activity
  • Integrated Noise Detection Algorithm helps avoid ‘False Positives’
  • Level Mode and Trend Mode
  • Audible output through headphones or built in speaker

TEV – PD Detection
Partial discharge activity inside metal clad high voltage plant induces small voltage impulses called Transient Earth Voltages on the surface of the metal panels. TEVs travel around the surface to the outside of the switchgear, where they can be picked up externally using the PD-LSGS detector.

AE – PD Detection
Defects on the surface of high voltage insulators are prone to a phenomenon known as surface tracking. Tracking causes carbon deposits that build up over time, ultimately leading to flashover and insulation failure. The PD-LSGS is highly sensitive to the ultrasonic emissions produced by tracking and enable the on-set to be detected before insulation failure.

The PD-LSGS is a dual transducer PD detector for Switchgear. The instrument detects TEV signals generated by internal discharge as well as acoustic discharge generated by surface tracking or corona.

Advantages of the PD-LSGS

 

  • Rapidly survey whole substation – detects MV and HV problems before they occur
  • Personnel Safety Device – ensure the substation is clear of PD before conducting work
  • Hear the PD – only instrument available that allows the user to hear both ultrasonic and TEV PD activity
  • Ergonomic and compact design – fits in the user’s pocket and is easy to use
  • Long lasting battery – allowing a whole day of testing without requiring a recharge

What’s in the box?

  • PD-LSGS
  • Headphones
  • Mains charger
  • Function Tester
  • USB/Car Charger
  • Hard wearing PELI™ case

Detailed Specifications
1. TEV Measurements

  • Sensor               Capacitive
  • Measurement Range       0 to 80 dBmV
  • Resolution       1 dB
  • Accuracy         ±1 dB

2. Ultrasonic Measurements

  • Measurement Range -6dBuV to + 70dBµV
  • Resolution       1 dB
  • Accuracy         ±1 dB
  • Transducer Sensitivity      -65dB (0dB = 1volt/µbar RMS SPL)
  • Transducer centre frequency      40 kHz

3. Hardware

  • Enclosure           Injection moulded plastic case
  • Screen            OLED with level LEDs
  • Control            Membrane keypad
  • Connectors      Power, Headphones and External Acoustic Sensor

4. Environmental

  • Operating Temp -5°C to 55°C
  • Humidity          0 to 90% RH non-condensing
  • IP Rating          54

5. Dimensions

  • Size                      190 x 90 x 65
  • Weight              300g

6. Power

  • Internal Battery      Lithium Ion, 3.75V, 2.2Ah
  • Operating Time  Approx. 12 hours

7. Battery Charger

  • Rated Voltage       90 to 264 V AC, 5V, 2.6A
  • Frequency         47 to 63Hz
  • Charge time      2 hours

LECOM PD-LSG 系列手持式便携式开关柜局放检测和定位测试仪 IPEC Switchgear

LECOM PD-LSG 系列手持式便携式开关柜局放检测和定位测试仪 IPEC Switchgear已关闭评论 , ,

LECOM 英国工厂生产：
最新电缆及开关柜：局放测试仪、检测仪器。
我们的专长：在强电场干扰环境可以正常使用。
Expertise in determining Partial Discharge (PD) signals in noisy electrical environments

What is Partial Discharge? 什么是局放
‘Electrical discharge that does not completely bridge the space between two conducting electrodes’
Where in insulation does PD occur? 局放产生的位置

What are the effects of PD? 局放会带来什么危害
Individual discharges are low energy but they are very localised and can be very repetitive.
Damage is caused by;
      Mechanical – Ionic bombardment
Thermal – Local heating at discharge site
Chemical – Discharge energy breaks chemical bonds

Classification of PD 局放的等级
Switchgear PD can be classified into 3 distinct types
Corona – Ionization of fluid (air) surrounding conductor – usually visible.
      (Surface) Tracking – Electrical tracking over contaminated insulator
      Arcing – Electrical breakdown of a gas that produces plasma discharge

PD and Noise 局放与背景噪声
Every substation or test point has background noise in the frequency range of TEV devices.
The majority of background noise is within acceptable ranges and will not interfere with TEV signals.
However, some noise will be high enough to interfere with correct measurement of PD activity
Common causes of background noise:

  • Fluorescent lighting inside substations
    Can generate high noise signals very local to measurement point
    Simple to remove
  • Induced EMC noise from local equipment, e.g. Transformers
    Difficult to remove
    Usually lower level
  • Air Conditioning or environmental controls
    Easy to remove
  • Differentiating between PD and Noise is the KEY to effective PD detection. The  LECOM PD-LSGS has an in-built noise rejection method;
  • Pulses per cycle:
  • The LECOM PD-LSGS has a built in Noise rejection system. Informing the user when detected pulses are too frequent in the power cycle to be PD.
  • When the LECOM PD-LSGS detects noise, the screen will
    Alternate between a Noise warning and the dB
    Reading detected.

The test systems will identify noisy environments.
Confirm this by placing the device within the substation but away from the switchgear:
      – On cabinets
      – Metal panels
      – etc
It is important to then attempt to remove the noise:
      – Check the common sources

Most noise will fall within acceptable limits (that is < 30dB)
Noise higher than 30dB that cannot be removed should be investigated by a LECOM PD-LSG1 device to assess the pattern in the power cycle
This will help conclude if it is noise, as well as often allowing the user to see the PD within the noise

Signs of PD 局放产生后有什么现象出现
– Smell of Ozone. Ozone:
 burning wire smell; spark smell; metallic; battery smell
– Actual evidence:

PD and Switching
PD most likely to occur during switching
It is essential to test before switching.

  • If PD is present, manual switching must not take place.
  • Consult your companies policy and procedures for whether remote switching should take place

Evidence and effects of PD 局放导致的影响

Electrical trees

Surface tracking

Carbonisation

PD Detection in Cables 电缆的局放检测