Fusing Requirements - GE DR60 Technical Manual

3.3

Fusing Requirements

18
Before cleaning the equipment, ensure that no connections are
energized. Use a lint free cloth dampened with clean water.
Integration of the equipment into systems shall not interfere with
its normal functioning.
The functioning of the device has been certified under the
circumstances described by the standards mentioned in
Technical Specifications chapter (item Type Tests). Usage of the
equipment in different conditions from the specified in this
manual might affect negatively its normal integrity.
The equipment shall have all their rear connectors attached even
if they are not being used, in order to keep their levels of ingress
protection as high as possible
Never manipulate liquid containers near the equipment even
when it is powered off.
Avoid modification to the wiring of panel when the system is
running.
VT circuits must never be left short circuited.
A high rupture capacity (HRC) fuse type with a maximum current
rating of 10 Amps and a minimum dc rating of 250 V dc may be
used for the auxiliary supply (for example Red Spot type NIT or
TIA). Alternatively, a miniature circuit breaker (MCB) of type C,
10A rating, compliant with IEC 60947-1 and IEC 60947-3 may be
used.
Digital input circuits should be protected by a high rupture
capacity NIT or TIA fuse with maximum rating of 10 A, or
equivalent MCB as above. For safety reasons, current transformer
circuits must never be fused. Other circuits should be
appropriately fused to protect the wire used.
Reason devices contain an internal fuse for the power supply
which is only accessed by opening the product. This does not
remove the requirement for external fusing or use of an MCB as
previously mentioned. The ratings of the internal fuses are:
DR60 unit: 2 Amp, type T, 250V rating
DR60-TM-EN-2A