This document is only for internal use of JINNENG CLEAN ENERGY TECHNOLOGY LTD, and shall not be published or
copied without permission of the company.
4.2 Grounding anti-thundered
4.2.1 Grounding
Fig.e Toothed washer nut
1) Use the marked 5.5 mm grounding holes (5.5mm) to ground the anodized frame. All nuts,
bolts, and gasket are type M5 and should be made of stainless steel (Fig. e).
2) Put the bolt through the Fixed end and then through the hole in the aluminum frame.
3) Add the gasket and nut on the other side of the bolt and tighten to secure all parts. The tightening
torque should be 2.1±0.1Nm. (Note that the copper wire cannot be attached directly to the
aluminum.).
To suggest grounding method above, also can use in line with the national electrical grounding
method of relevant norms.
4.2.2 Precautions for grounding anti-thundered
Conventional grounding hardware (nuts, bolts, washers, toothed lock washers, smooth washers,
etc.) is used to connect grounding or securing equipment. The connection must comply with the
grounding equipment manufacturer's instructions. When grounding, observe the following local
