Parker EME
Sizing and selection of on-board fuse
19
192-300300N1 GVI Frames C, D & E 2019-9
7.7
Sizing and selection of on-board fuse
NOTE
An on board fuse is not supplied with the Motor Controller. This component must be sourced
separately.
An on-board fuse (F1 in Figure 10) installed between the B+ and + terminals on each motor controller
protects the motor controller and power distribution circuit in the event of a short circuit fault in the power
conversion section.
Consider the fuse accessibility for maintenance purposes when choosing location of the motor controller.
Each motor controller must be fused against internal faults and short circuits. Instead of an on-board fuse, a
user may choose to locate this fuse off the motor controller (i.e. at a central fuse panel). In this configuration
battery power is connected directly to the motor cont terminal.
NOTE
The fuse is not intended to protect the motor controller or motor against overloads.
Selection of appropriate fuse ratings is a system design issue and falls under the OEMs responsibility. As a
rule of thumb, the fuse shall be rated based on the motor controller’s power output (2 min. rating) listed in
chapter 13.2.
Calculate DC input current as follows:
I
DC_IN
=
Power output
[
kVA
](
2 min rating
)
×1 000
V DC
Select a fuse with rating and time delay characteristics which will carry IDC_IN indefinitely, but blow within 2 -
3 seconds for 2 x IDC_IN.
Figure 11 shows typical dimensions of the fuse for on-board mounting. Buss (ANN series), Pudenz and
others manufacture fuses that satisfy the time delay and dimension requirements.
Pos
Name
Pos
Name
1
Pudenze
2
Buss (ANN series)
Figure 11. Dimensions for the motor controller On-board Fuse
