HV Breakout Module – Mounting and installation
Installation Manual
18
Version 01.20 // 2021
Fig. 4-12: HV BM 1.2, housing opened, additional nuts visible
NOTE!
Another four nuts are mounted on the threaded bolts. These nuts are
located below the nuts that are used to fix the ring terminals. Two of them
are used to fix the shunt to the bus bar (→ see blue arrow in Fig. 4-12).
"
Do not loosen these four nuts under any circumstances.
Fig. 4-13: HV BM 1.2, housing opened, HV cable mounted
↻
↻
↻
↻
↻
↻
↻
↻
⊖
⊕
⊖
⊕
"
Place the ring terminals on the corresponding threaded bolt (
⊕
or
⊖
, depending on
the connection diagram used).
"
Use the four nuts to fasten the ring terminals (
↻
) and tighten them applying the
torque specified in Tab. 4-2.
Module type
Screw type
Tightening torque
HV BM 1.1, hardware rev. A
Brass screw
5 Nm (M6) and 15 Nm (M8)
HV BM 1.2
Brass screw
15 Nm (M8)
HV BM 1.2
Steel screw
30 Nm (M8)
10
Tab. 4-2: Tightening torques for the mounting of ring terminals
4.3.3.4 Exceptional case: Mounting ring terminals for cable cross-section 35 mm²
The following section describes the mounting of ring terminals with a 35 mm² cable cross
section on the shunt side.
The instruction applies to HV BM 1.2 as of hardware revision D.
Due to the shunt design, the ring terminals for this cable cross-section have to be mounted
upside down. For this purpose the spacers which are located on the threaded bolts below
the shunt must be removed.
10 As of hardware revision E, M8 steel screws are exclusively used for both module versions.