Wiring; Insulation Class I And Class Ii Luminaires - Philips Xtreme Surge Protector I Design-In Manual

Wiring

Achieving the specified protection levels on page 10
is possible if:
• incoming mains wires are routed first to the
Xtreme SPD and from there on to the driver input.
• mains wires between the Xtreme SPD and driver
are kept as short as possible.
• ground wire between the Xtreme SPD and the
luminaire housing / LED module heatsink is kept
as short as possible.
It is therefore not recommended to remotely mount
the Xtreme SPD such as in a pole or remote
distribution box. In cases remote mounting is the
only option, it is necessary to perform additional
measurements in the luminaire to define the
maximum achievable protection levels.
When connecting the Xtreme SPD, it is strongly
advised to adhere to the following EMC guidelines:
• keep all wires short
• keep wiring loop areas small
• ensure that mains wires are kept separate from
low-voltage signal circuit wires.
Respecting these rules, will minimize the distance
and wire length between the Xtreme SPD and the
mains voltage entry point.

Insulation Class I and Class II luminaires

The main differences between an insulation Class I
and insulation Class II luminaire are about its failsafe
construction with respect to electrical safety.
In a Class I luminaire, electrical safety is achieved by
a combination of basic insulation between live parts
and accessible parts and establishing a protective
earth connection (PE) to accessible parts (luminaire
housing). Luminaire insulation strength is based on
basic system insulation requirements.
A Class II luminaire does not have a protective earth.
In this case, electrical safety is achieved by providing
double or reinforced insulation which are subject to
elevated insulation strength requirements.
Per IEC60598-1: 2014 paragraph 4.10.4 the double or
reinforced insulation in a (Class II) luminaire between
live and accessible parts is allowed to be bridged
only by a resistor and/or capacitor. By design, the
Xtreme Surge Protector I does not meet this
requirement.
Therefore, the Xtreme Surge Protector I is not
suitable for design-in in an Insulation Class II
luminaire.
10
Wiring in an insulation Class I luminaire
For optimal protection against surges the SPD should
be connected in the luminaire as shown below.
LED driver
EQUI
Xtreme
Surge
Protector
OLC
1
Correct wiring in an insulation. Class I luminaire
Basic insulated module