HV Breakout Module – Mounting and installation
Installation Manual
12
Version 01.20 // 2021
4.3 Connecting HV power cables to HV BM devices
This chapter provides information on how to connect HV power cables to an HV BM and on
the preparation and handling of PG glands
i
Information on the preparation of the various HV power cables can be
found in the appendix of this document.
→ See chapter 7.1 "Cable preparation".
i
Section headings with module-specific content are preceded by the module
name, which indicates that non-applicable sections can be skipped.
Required tools
f
Allen key, size 2.5
f
Two wrenches, size SW24 (for M20), SW30 (for M25) and SW36 (for M32)
f
HV BM 1.x only: Ring wrench (deep cranked) or ratchet/socket wrench (w. deep nut),
size SW10 (M6) or SW13 (M8)
4
NOTE!
The space inside a housing is limited. This is in particular true for module
version HV BM 1.1. Therefore, ring wrenches should be avoided for assembly
work if possible.
"
Use the smallest possible socket wrench inserts for assembly.
HV BM 1.x: Connecting the HV power cables to the measurement module
WARNING!
HV BM 1.x devices are supplied with suitable ring terminals.
"
Only use adequate ring terminals when mounting the HV power cables.
"
If you want to use ring terminals other than those included in the
scope of delivery, make sure that
f
sufficient space is provided in the housing, so that there is ade-
quate clearance between the ring terminals and the housing as
well as between the ring terminals.
f
the combination of ring terminal and nut will not extend over the
threaded bolts. Otherwise the distance between nut and housing
cover may be too small.
There is the
risk of life-threatening electric shocks
and
short-circuits
if
these instructions are not observed.
The HV power cables are connected to HV BM 1.x modules by means of ring terminals mounted
on threaded bolts.
If current and voltage are to be measured:
"
Attach an
M6
ring terminal (HV BM 1.1)
5
or an
M8
ring terminal (HV BM 1.2) to
both positive HV cables (HV+).
"
Attach
M8
ring terminals to both negative HV cables (HV-).
If only current is to be measured:
"
Use an
M8
ring terminal.
"
Please observe the connection diagrams in chapter 4.3.1.
4 M6 is only used for HV BM 1.1, hardware revision A. As of hardware revision E, only M8 is used.
5 See fn. 4.
