Integration guidelines
GVI Product Manual: Frames C, D & E
20
192-300300N1 GVI Frames C, D & E 2019-9
7.7.1. Selecting rectangular washer for fuse mounting
The following issues shall be taken into consideration when selecting rectangular washers for mounting of an
in-board fuse.
Pos
Name
Pos
Name
1
On-board fuse
2
Washer (te)
3
Washer (te)
4
Washer (terminal B+)
Figure 12 On-board fuse washers
•
The washers (2, 3 and 4) shall be rectangular (not square).
•
Washer (3) shall be tin-plated copper to conduct the high current and minimize losses
between fuse and terminal.
•
Washer (4) shall have same thickness as washer (3) for alignment of fuse. No current
goes through this washer (4).
•
Washer (2) serves to distribute pressure between on-board fuse (1) and washer (3). No
current flows through this washer (2).
•
The washers (2, 3 and 4) are used as reinforcement for thin (weak) fuse terminals. If
fuse terminal thickness is > 2mm square washers are not necessary (on-board fuse (1)
is stable in itself).
7.8
Sizing of logic supply fuse
The logic supply fuse (F2 in Figure 10) is part of the KEY_INPUT protection, see chapter 8.3.2.
The fuse should be sized according to the number of motor controllers connected to the fuse and to protect
the cable area in the circuit and the current consumption of the KEY_INPUT.
Name
Recommended value
Fuse size
Slow acting fuse 6-10 A (depending on the load)
KEY_INPUT power input
< 15 W
Table 4 Recommended values for sizing of logic supply fuse
