Disconnect Switch; Fusing - KEB COMBIVERT F5 Instruction Manual

i
Connection of the F5 series inverters to voltage systems configured as a cor-
ner grounded delta, center tap grounded delta, open delta, or ungrounded
delta, may defeat the internal noise suppression of the inverter. Increased high
frequency disturbance in the controller and on the line may be experienced. A
balanced, neutral grounded wye connection is always recommended. The three
phase voltage imbalance must be less than 2% phase to phase. Greater imbal-
ance can lead to damage of the inverter's power circuit.
1.4.3 Disconnect switch
A disconnect switch or contactor should be provided as a means of turning off the
supply voltage when the unit is not in use or when it must be serviced.
Repetitive cycling on and off of the input supply voltage more than once every
two minutes can lead to damage of the inverter.

1.4.4 Fusing


Integral solid state short circuit protection does not provide branch circuit protec-
tion. Branch circuit protection must be provided in accordance with the Manufac-
turer Instructions, National Electrical Code (NFPA70 or CSA22.1) and any addi-
tional local codes.
Branch circuit protection for the F5 must be provided using the fuses as listed in
the tables 1.4.4.1 and 1.4.4.2 below. The class RK5 fuses are recommend. As
an Example, use BUSSMANN type FRS-R for 480V or FRN-R for 230V. Other
manufacturers' class RK5 fuses are also acceptable.
The minimum voltage rating for protection devices used with 230V inverters shall
be 250VAC. The minimum voltage rating for protection devices used with 460V
inverters shall be 600VAC.
Table 1.4.4.1 - 230V Units
Unit Size /
Housing
13 / E
14 / G
15 / G , H
16 / H
17 / H
18 / R
1 / R
20 / R
21 / R
SCCR UL 248
[kA] TYPE RK5 TYPE L
rms Rating [A] Rating [A]
10 40
10 50
10 70
10 0
10 110
100 125
100 150
100 175
100 200
* Semiconductor fuses are manufactured by Siba Fuse Inc. When using this type of fuse,
this is the model number of the fuse is the fuse that must be used.
General
Semiconductor
Fuse Number* /
Rating [A]
- -
50 140 06 80 / 80
- -
50 140 06 100 / 100
- -
50 140 06 80 / 80
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
UL 48
MCCB [A] /
Siemens Cat. No.
150A / DG-frame 3VL 150 UL
150A / DG-frame 3VL 150 UL
250A / FG-frame 3VL 250 UL
250A / FG-frame 3VL 250 UL
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