9
CURRENT TECHNOLOGY
®
CURRENTGUARD
TM
COMPACT INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Connecting Form “C”
Dry Contacts
All CurrentGuard units with the -M monitoring option come with one set of
Form “C” dry relay contacts for the surge protective device status . These
contacts are for connection to a user-provided remote alarm and monitoring
circuit . The relay contacts are rated 150VDC/125VAC with maximum switching
power of 30WDC/60VA AC .
When input power is present on all phases, terminals “NO” (Normally Open)
and “COM” (Common) are an open circuit and terminals "NC" (Normally
Closed) and “COM” are a closed circuit . The contacts change state when the
unit has encountered failure to one or more phases .
The CGC comes pre-wired with 36" of #20AWG conductors .
See Figure 6 for the Form "C" wiring and contact configuration .
Use butt splices within the panelboard to connect the Form “C” leads to the
user’s monitoring circuits . Alternatively, install a junction box between the JSP
and the panelboard to connect Form “C” leads to user’s monitoring circuits .
If the Form “C” contacts are not used, user has the option of either cutting
off the leads or coiling up the leads and saving them for potential future use .
Consult applicable local codes to ensure proper installation .
Remote Monitoring
Figure 6
Wire Connections
Contacts shown in de-energized state
(alarm condition).
FORM C RELAY
SHOWN IN ALARM
CONDITION
N.O. • BLK
COM. • WHITE
N.C. • RED
N.O.
COM.
N.C.
