The SPM series of modular surge protection devices provides protection of equipment
connected to incoming low voltage AC power supplies against the damaging effects of
transient over voltages caused by local lightning strikes, or the switching of electrical
inductive or capacitive loads. SPM devices are ideally suited for the protection of electrical
distribution systems in buildings, generator set standby power supplies, combined heat
and power, and co-generation applications against corrupted data and software,
equipment failure and structural damage.
The SPM comprises separate 1, 2, 3 or 4 modular DIN rail connection bases, and a
comprehensive range of 6kA or 40kA replaceable plug-in protection modules with integral
mechanical status indication, which simply plug in. Connection bases are available with,
or without, an additional remote indication facility for the communication of status
information into building management or SCADA systems. For installation convenience,
the SPM series allows the selection and configuration of any number of modules to suit
individual applications, or complete assemblies of the most popular configurations.
The SPM series provides protection of expensive power assets against the damaging
effects of mainsbourne transients through carefully matched high energy absorbing
elements. Each type of plug-in protection module has a colour coded label to enable
easy identification, eg: 6kA modules are purple, 40kA modules are blue, and
neutral/earth modules are green. The highly flexible characteristics of the SPM allow
the selection and configuration of any number of modules to suit the surge
protection requirements of individual applications.
DIN Rail Modular Connection Bases
The SPM series offers DIN rail mount connection bases in 1, 2, 3 or 4 modules, into
which the chosen surge protection module(s) simply plug-in. Connection bases can
be supplied either with, or without, additional remote indication facility for
communication of status information into building management or SCADA systems.
6kA SAD Plug-in Surge Protection Modules
Silicon avalanche diode (SAD) models conduct maximum current without any
increase in clamping voltage. The robust nature of this
component technology offers long product life expectancy, ideally suited for high
risk mobile telecom or other mission critical applications. 6kA modules are available
in phase, and neutral to earth versions.
40kA MOV Plug-in Surge Protection Modules
Metal oxide varistor (MOV) models provide excellent clamping of transients and are ideally suited for high/medium/low risk applications, as
detailed in EN 61643-11:2002. 40kA modules are available in phase, and neutral to
earth versions.
6kA and 40kA Neutral to Earth Plug-in Surge Protection Modules
SPM series offers neutral to earth protection for use in conjunction with 6kA SAD or
40kA MOV surge protection modules. Surge voltages affect system earth to neutral
to a lesser degree than the main incoming AC supply, but should be protected
against damaging transients.
Complete Assemblies
For installation convenience, the SPM series offers the most popular configurations
of connection bases and surge protection modules as complete protection
assemblies.
 1, 2, 3 or 4 modular connection bases
With or without remote indication facility
6kA or 40kA protection
Single or three phase
With or without neutral/earth protection
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Features
1, 2, 3 or 4 modular DIN rail mount
connection bases
6kA SAD and 40kA MOV plug-in
protection modules
Neutral to earth plug-in modules
Complete assemblies of the most
popular configurations
Hot working replaceable plug-in
modules
Thermal and current overload fusing
Protection status indication
Remote status indication option
Benefits
Protection of expensive power assets
Single and three phase options
Remote monitoring into building management or SCADA systems
Nuisance tripping avoidance of RCCD's
Simple installation
Maintenance free
Suitable for new or retrofit applications
Applications
LV switchboards
Sub distribution boards
Generator sets
Mobile telecommunications
Windfarms
Railways
Approvals
EN 61643-11:2002
BS6651:1999 Annex C
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