The Bowthorpe EMP range of Surge
Arrester monitoring instruments are
fully tested for use with any
manufacturers surge arrester.The
SC12 is a Surge Counter only, whilst
the SC13 provides the additional
measurement of total leakage
current. The analogue instrument
provides a means of monitoring the
current through the arrester and the
leakage current over the surface of
the arrester housing. Significant
changes after installation may
indicate a deterioration in the
arrester or a build up of surface
contamination.
These instruments, which require no
auxiliary supply, are designed for
installation in the earth connections
of a single surge arrester or
alternatively the SC12 may be used
with the common earth of a three
phase set. Fully weatherproofed and
sealed for life they are housed in a
one piece gravity die cast aluminium
case coated to enhance its already
high degree of resistance to surface
corrosion. The glass viewing window
is sealed in place, using a silicon
rubber adhesive, and a desiccator is
enclosed to ensure any residual
moisture trapped during sealing is
absorbed for the service life of the
counter. Mounting is effected by
means of an integrally cast lug at the
rear of the case
Surge Counters
Type SC12 & SC13
providing a single clearance hole for
the galvanised steel M12 bolt
supplied.
The SC12 and SC13 are service
proven and require no special
maintenance or servicing apart from
general cleaning of the glass
viewing window and the moulded
epoxy resin line terminal bushing. |