11
JOSLYN
®
JSP
TM
, JSPR INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Connecting Form “C”
Dry Contacts
Units that come with Form “C” dry relay contacts provide status of the surge
protective device . These contacts are for connection to a user-provided remote
alarm and monitoring circuit . The relay contacts are rated 65VDC/150VAC with
maximum switching power of 30WDC/60VA AC . The Form “C” contacts come
pre-wired with 36" of #20AWG conductors on the JSP 60 to 100kA models and
on all JSPR models .
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 installer must provide the appropriate raceway and wiring for the monitoring
circuit, observing the restrictions and conduit openings illustrated in an earlier
section of this manual .
Remote Monitoring
Figure 7
Wire Connections
Contacts shown in de-energized state
(alarm condition).
Figure 8
Terminal Block
Contacts shown in energized normal state
(no fault condition).
Models: JSP120kA to JSP400kA
For these models, the Form “C” contacts must be wired by the installer .
See Figure 8 for the Form “C” contact configuration and terminal location on
the monitor board . The annotations on the diagram match the markings on the
terminal block .
The installer must route the monitoring conductors to the terminal blocks on
the door mounted main monitoring board . Route the wires to allow the door
to be opened and closed properly . Tighten screws on terminals to 3 .5 in-lbs .
(0 .4 Nm) . This terminal block will accept wire sizes #28AWG–#16AWG .
#18–#20AWG is recommended .
Models: JSP60kA to JSP100kA with -M option and JSPR Series
For these models, the Form “C” contacts come pre-wired with 36" of #20AWG
conductors .
See Figure 7 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
Series 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 .
FORM C RELAY
SHOWN IN ALARM
CONDITION
N.O. • BLK
COM. • WHITE
N.C. • RED
N.O.
COM.
N.C.
