Connecting Form "C" Dry Contacts; Remote Monitoring - Joslyn JSP series Installation, Operation And Maintenance Manual

JoslyN JsP iNsTAllATioN, oPerATioN AND MAiNTeNANce MANuAl
® TM
Connecting Form "C"
Dry Contacts

Remote Monitoring

Figure 7
Wire Connections
Contacts shown in de-energized state
(alarm condition).
FORM C Relay
n.O. • BlK
COM. • whIte
n.C. • Red
ShOwn In alaRM
Figure 8
Terminal Block
Contacts shown in energized normal state
(no fault condition).
COVER REAR VIEW
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 .
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 .
Models: JSP60kA to JSP100kA with -M option
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
and the panelboard to connect Form "c" leads to user's monitoring circuits .
n.O.
if the Form "c" contacts are not used, user has the option of either cutting
COM.
off the leads or coiling up the leads and saving them for potential future use .
consult applicable local codes to ensure proper installation .
n.C.
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 .
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