MITICA, the full scale prototype of ITER Heating Neutral Beam Injector required to heat up ITER plasma with 16.5 MW injected power, is under realization at the Neutral Beam Test Facility (NBTF) in Padova (Italy) with the contributions of JApanese and EUropean Domestic Agencies (JADA and EUDA, respectively). The objective of MITICA is to produce a 16.5 MW neutral beam, obtained by accelerating negative Deuterium ions up to 1 MeV for a total ion current of 40 A and then neutralized.

MITICA Power Supply (PS), installed from 2016 to 2019, includes several non-standard equipment, with ratings well beyond the present industrial standard for insulation voltage level (-1 MVdc) and dimensions:

•

the Acceleration Grid Power Supply (AGPS), composed of five DC Generators (DCG) rated for -200 kVdc each, connected in series to produce -1 MVdc acceleration voltage;

•

the Ion Source and Extraction Power Supply system (ISEPS);

•

the large air insulated Faraday cage (High Voltage Deck1, HVD1) hosting ISEPS and connected to the Transmission Line (TL) through an air-to-SF6 Bushing (High Voltage Bushing Assembly, HVBA);

•

a 100 m gas (SF6) insulated TL, connecting AGPS and ISEPS to the beam source installed inside the vacuum vessel through

•

the SF₆-to-vacuum HV Bushing (HVB).

The definition of the interfaces both between components supplied by the different DA’s and towards the buildings has been studied and finalized as far as possible during the design phase. Nevertheless, during the installation phase some issues emerged and had to be solved, minimizing modifications of the components already manufactured. The paper deals with the experience gained during the installation activities, focusing on solutions to interface the aforementioned equipment with NBTF buildings according to the stringent dimensional requirements and to the electrical insulation issues of the TL from the buildings. In particular, the solutions adopted to realize the electrical and mechanical interfaces between the TL and the HVBA are described in detail.

MITICA是以16.5 MW注入功率加热ITER等离子体所需的ITER加热中性束注入器的完整原型，由日本和欧盟的国内代理商在意大利帕多瓦的中性束测试设施（NBTF）上实现。 （分别是JADA和EUDA）。MITICA的目标是产生16.5 MW中性束，该束是通过将负氘离子加速至1 MeV且总离子流为40 A而获得的，然后中和。

从2016年到2019年安装的MITICA电源（PS）包括几种非标准设备，其额定值远远超过了目前的绝缘电压水平（-1 MVdc）和尺寸的工业标准：

•

加速电网电源（AGPS），由五个分别额定为-200 kVdc的直流发电机（DCG）组成，串联产生-1 MVdc加速电压；

•

离子源和提取电源系统（ISEPS）；

•

装有ISEPS的大型空气绝缘法拉第笼（高压甲板1，HVD1），并通过气对SF6套管（高压套管组件，HVBA）连接到传输线（TL）；

•

一个100 m的气体（SF6）绝缘TL，将AGPS和ISEPS通过安装在真空容器内的光束源连接

•

SF ₆真空HV衬套（HVB）。

在设计阶段，尽可能研究并最终确定了由不同DA提供的组件之间以及与建筑物之间的接口定义。但是，在安装阶段出现了一些问题，必须解决这些问题，以最大程度地减少对已制造组件的修改。本文介绍了在安装活动中获得的经验，重点是根据严格的尺寸要求以及TL与建筑物之间的电绝缘问题，将上述设备与NBTF建筑物连接的解决方案。特别是，将详细描述为实现TL和HVBA之间的电气和机械接口而采用的解决方案。