Fusing Requirements; Equipment Connections - GE Reason RT412 Technical Manual

RT412

Fusing Requirements

Equipment Connections

RT412
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.
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, 10 A rating, compliant
with IEC 60947-2 may be 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 2 Amp, type T, 250V.
Terminals exposed during installation, commissioning
and maintenance may present a hazardous voltage
unless the equipment is electrically isolated.
Tighten M3 clamping screws of heavy-duty terminal block connectors
to a nominal torque of 1.0Nm. Tighten captive screws of header-type
(Euro) terminal blocks to 0.5 Nm minimum and 0.6 Nm maximum.
Always use insulated crimp terminations for voltage and current
connections.
Always use the correct crimp terminal and tool according to the wire
size.
In order to maintain the equipment's requirements for protection
against electric shock, other devices connected to the equipment shall
have protective class equal or superior to Class I.
Chapter 2 – Safety Information
14