SECTION TWO – WIRING AND INSTALLATION
DS2000 USER’S MANUAL (rev.C)
2.7
2.3 EXTERNAL FUSES
It is recommended to use the Short Circuit protection in the final application with UL certified
external fuses (cat. JFHR2), manufactured by Bussmann Div. Cooper (UK) Ltd,
semiconductor type, 660 V
ac
, 200 kA symmetrical A.I.C..
As alternate fuses by different manufacturers can be used but UL approved (cat. JFHR2) with
the same data of the fuses shown in table taking care that the Peack-let-trough-current
(A.I.C) and clearing I2T are equal or lower.
DS2000 MODEL
A size B size
3/9 4/12 6/15 8/22 14/42
Notes
Short Circuit
Rating
5000 rms Amps symmetrical
Power line fuse 50 – FE Semiconductor
24 V
dc
auxiliary
power supply
fuse
3A / 250V Delayed
DS2000 MODEL
C size D size
20/45 25/70 30/90 50/140 60/180
Notes
Short Circuit
Rating
5000 rms Amps
symmetrical
5000 rms
Amps symm.
10000 rms
Amps symm.
Power line fuse 100 – FE 160 – FEE Semiconductor
24 V
dc
auxiliary
power supply
fuse
3A / 250V Delayed
DS2000 MODEL
E size
100/300
Notes
Short Circuit
Rating
10000 rms Amps symmetrical
Power line fuse 315-FM Semiconductor
24 V
dc
auxiliary
power supply
fuse
3A / 250V Delayed
Tab. 2.1 – Recommended fuses