ERICO TDS-DINLINE Surge Suppressor - Manual (Page 26)

PAGE 26
D S D I N S T A L L A T I O N I N S T R U C T I O N S
15. TDS-SC SURGE COUNTER
The Surge Counter is designed to interface to
the TDS DINLINE units via the supplied CT,
to record the number of surges and impulses
diverted. This is achieved by measuring the
transient current diverted by the TDS
protection device. It is important that the CT
be installed into the circuit where it is
measuring the surge current only, and not
where mains load current is passed through
the core. Method 1 and Method 2 (page 28)
detail the correct connection. Page 27 shows
an incorrect connection as the equipment load
current is passed through the CT core. The
magnetic field from the load carrying
conductor may cause the CT core to saturate.
The surge Counter may fail to record any
transients and additionally dangerously high
voltages may be present on the TDS-SC & CT
terminals.
WARNINGS
• Do not install CT into load current carrying
circuits.
• CT must be installed into surge current
path only.
• Only install the CT and Surge Counter after
all power and transient sources are
removed and isolated from the equipment
the Surge Counter is to monitor.
• Do not open circuit or disconnect
connections on the secondary of the CT
when monitored circuit is powered or
connected to possible transient source.
Hazardous voltages may exist in the
secondary circuit and in the CT/TDS-SC if
these instructions are not followed.