The High Voltage, Inc. TD-65E Tan Delta bridge is designed to work with and communicate wirelessly via the XBee protocol to the VLF-65E to form a complete cable diagnostic system. Together they offer high end features such as wireless communication, data acquisition, and report generation using the supplied E-Link PC software.
This system is designed to perform Tan Delta testing, also known as Tan δ, Dissipation Factor or Loss Angle on 5 to 35kV primary cables. Tan Delta testing is a non-destructive diagnostic test performed to measure the degree of deterioration of shielded MV/HV cable insulation. The results reveal how contaminated, damaged, or water tree strewn the insulation has become. Tan Delta testing is performed with the cable off-line where an AC power source, in this case a very low frequency (0.1Hz) hipot, provides the test voltage to the cable while the Tan Delta device records the results. The test voltage is increased in steps while readings are monitored to avoid
possible cable failure should the TD numbers indicate severe degradation.

Voltage Measurement: Range: 1 – 65 kV peak/1 – 38 kV rms
Accuracy & Resolution: 1% & 0.1 kV peak
Current Measurement: Load Range: 60 mA rms
Accuracy & Resolution: 1% & 1 μA rms
Tan δ Measurements: Load Range: Freq: 0.1 Hz – 0.01 Hz, 5 nF – 10 μF
Accuracy & Resolution: 1.0 x 10? & 1 x 10?
Communications: Range ~ 30 m: XBee 802.15.4 (not Bluetooth)
Power Input -Battery:

Alkaline: Two “C” cells required – 4 provided
NiMH: Rechargeable batteries acceptable – not included
Dimensions: TD Transducer w/Tripod: 6” x 8” x 18” (152 x 203 x 457 mm)
TD w/Pelican Type Case: 40 lbs / 18.14 kg (with equipt) plus HVI canvas bag

Weight: TD Transducer – w/case: 5 lbs/2.3 kg 8 lbs/3.6 kg
Access. bag: 10 lbs/4.5 kg
Input Cable Connection:

MC Connector – Male120 square mm

Output Connection: 1/4 – 20 female thread w/accessories
Ground Connection: 1/4 – 20 stud w/wingnut
Environmental
Requirements:

Operating temp: – 10°C to + 55°C
Storage temp: – 25°C to + 65°C
Humidity: 80% up to 31°C (88°F)

高压公司TD-65E Tan Delta电桥被设计成与VLF-65E一起工作，并通过XBee协议与VLF-34E进行无线通信，从而形成一个完整的电缆诊断系统。它们一起提供诸如无线通信、数据采集和使用提供的E-Link PC软件生成报告的高端功能。
该系统设计用于对5至35kV主电缆进行Tan Delta测试，也称为Tanδ、耗散因子或损耗角。Tan Delta测试是一种无损诊断测试，用于测量屏蔽中压/高压电缆绝缘的劣化程度。结果揭示了被污染的、受损的或水树散布的绝缘材料是如何形成的。TANδ测试是用电缆离线进行的。
交流电源，在这种情况下，一个非常低的频率（0.1Hz）hipot，提供测试电压到电缆，而Tan Delta设备记录结果。测试电压按步骤增加，同时监测读数，以避免可能的电缆故障，如果TD数字表明严重退化。

电压测量：范围：1～65 kV峰值/ 1～38 kV均方根值

精度和分辨率：1%和0.1 kV峰值

电流测量：范围：0～60毫安均方根

精度和分辨率：1%μA和1μA

TANδ测量：负载范围：FRQ：0.1 Hz – 0.01 Hz，5 nF- 10μF

精度和分辨率：1×10和1×10

通信：范围30 m：XBee 802.15.4（非蓝牙）

电源输入-电池：

碱性：需要两个“C”细胞- 4

镍氢电池：可接受的充电电池-不包括在内

尺寸：TD换能器：6×8×18”（152×203×457 mm）

TD W/鹈鹕型：40磅/ 18.14公斤（装备）加HVI帆布袋

重量：TD换能器-W/CASE：5磅/ 2.3公斤8磅/ 3.6公斤

附件。袋：10磅/ 4.5公斤

输入电缆
连接：

MC连接器-公接头120平方毫米

输出连接：1/4 – 20母接头螺纹W /附件

接地：1/4 – 20螺栓/螺母

环境要求：

操作温度：-10°C至+55°C

存储温度：-25°C至+65°C

湿度：80%至31°C（88°F）

CABLE DIAGNOSTIC TOOLS

Minimize In-Service Failures

Cable testing covers many topics and a broad range of testing methods and equipment, including diagnostic methods of insulation testing such as tan delta assessment and partial discharge detection. HVI offers some the most reliable and easy to use tools for assessing cable health in addition to the VLF withstand test.

Tan Delta (TD)

Tan Delta, also called loss angle or dissipation factor testing, is a diagnostic method of testing cables to determine the quality of the cable insulation. Using a VLF unit as the voltage source and a divider to make the measurements, the voltage is raised while measuring the tan delta of the cable. If the insulation of a cable is free from defects, like water trees, electrical trees, moisture and air pockets, etc., the cable approaches the properties of a perfect capacitor with a phase shift of 90° between the voltage and current. If there are impurities in the insulation, its resistance decreases, causing an increase in resistive current through the insulation.

The extent to which the phase shift is less than 90 degrees is indicative of the level of insulation contamination, and that “loss angle” is measured and analyzed. The absolute TD number is important, but if the curve trends sharply upward as the voltage is raised, the cable is highly degraded. With TD testing, cables can be rated as?highly, moderately, or slightly degraded.?The resulting data can help prioritize cable replacement, injection, and/or determine what other tests may be warranted. TD equipment cost is moderate, the test is easy to perform, and the results are straightforward.

HVI’s tan delta measurement tools pair seamlessly with our VLF E Series test equipment. Our custom software, VLF E-Link, is designed to generate TD as well as VLF withstand test results with flexible reporting options.

电缆诊断工具

尽可能地减少服务中的故障

电缆测试涵盖了许多主题和广泛的测试方法和设备，包括绝缘测试的诊断方法，如tan delta评估和局部放电检测。除了VLF耐受性测试之外，HVI还提供了一些可靠和易于使用的工具来评估电缆的健康状况。

Tan Delta

Tan Delta，也称为损耗角或耗散因数测试，是一种测试电缆以确定电缆绝缘质量的诊断方法。使用VLF单元作为电压源和分压器进行测量，在测量电缆的tanδ时提高电压。如果电缆的绝缘没有缺陷，如水树，电树，湿气和气穴等，则电缆接近理想电容器的特性，电压和电流之间的相移为90°。如果绝缘体中存在杂质，则其电阻降低，导致通过绝缘体的电阻电流增加。

相移小于90度的程度表示绝缘污染的程度，并且测量和分析“损耗角”。绝对TD数很重要，但如果随着电压升高曲线趋于急剧上升，则电缆会严重退化。通过TD测试，可以将电缆评级为??高度，中度或轻微降级。?得到的数据可以帮助确定电缆更换，注入的优先级，和/或确定可能保证的其他测试。TD设备成本适中，测试易于执行，结果简单明了。

HVI的tan delta测量工具与我们的VLF E系列测试设备无缝配对。我们的定制软件VLF E-Link旨在通过灵活的报告选项生成TD和VLF耐受测试结果。