IR lamp control module - HELCON 11XX series -
Installation, use and maintenance manual - EN
Ver. 1.02
18
5.3.1.1 Connection scheme
The HELCON 11XX series modules are designed to operate on networks with TT or TN distribution. The op-
eration is not foreseen on IT networks, or with so-called “corner grounded” distributions. The following image
illustrates a typical usage scheme:
The protection of the device and of the power supply cables must be carried out by means of circuit breakers
of the magnetothermic type with tripping curve C complying with the EN IEC 60947-1 standard. The size of the
same must be 63A for modules with 8 outputs and 80A for those with 10 outputs. The short-circuit current pro-
vided at the point of installation must not exceed 5 kA.
In the case in which the maximum short-circuit current exceeds this limit, in order to protect the apparatus and
avoid damage to people and property, upstream of the automatic circuit-breaker use devices that are suitable
to limit the short-circuit current to a value not higher at 5 kA. Such devices could be constituted by fuses, or
switches-limiters. Contact SMITEC for information on the sizing of the same.
