SC12 and SC13 Surge Counters
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 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. |
