Accessories and Spare Parts
Operation manual b maXX BM4100 (NWR)
Document no.: 5.04052.09
117
of 142
11
11.2.1 Pre-charge protection
See F2 in ZFigure 23– on page 67.
Pre-charge fuse The pre-charge circuit is short-circuit proof between ZK+ (DC link +) and ZK- (DC link -).
To protect the pre-charge circuit in case of a short-circuit between ZK (DC link) and PE
use the following fuse element:
3-phase cable protection, I
n
= 2 A,
e.g.
G fuse cartridge (fast-acting), 2 A made by SIBA
Type: 171530
Fuse terminal block for cartridge fuse insert made by Phoenix Contact
Part no.: 3004100, part name: UK 5-HESI.
11.2.2 24V extra-low voltage protection
In case you refer to UL 508 C:
Assure, that all marked e.l.v. connections (24 V) at the device have a maximum voltage
of 30
V
DC
. Additionally these connections must be protected with fuses which are in ac-
cordance with UL 248 with a triggering current of maximum 4 A.
NOTE
The device is not operated correctly and any kind of claim to warranty will expire, if
the fuse element is not installed.
HINWEIS!
If the current consumption is lower than 4 A, several connections can be protected
together with a UL-listed fuse (release current max. 4
A).
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