Setra Systems SSC-2S Operation And Installation Instructions
Introduction
The Sure-Set Current Switch (SSC) Series
of digital output switches are noninva-
sive devices designed to detect current
flowing through a cable or wire. A cost
effective solution for monitoring on and
off status or proof of operation, these
devices are ideal for monitoring the cur-
rent load on motors driving fans, pumps,
chillers, compressors and blowers. The
Model SSC Current Switch has a univer-
sal power supply. Excitation is magneti-
cally induced from the current carrying
conductor (wire or cable) being sensed,
making these devices completely self-
powered.
Warning: Risk of Electric Shock
Disconnect power supply before mak-
ing electrical connections. Contact
with components carrying hazardous
voltage can cause electrical shock and
may result in severe personal injury or
death.
Warning: Risk of Arc-Flash
Disconnect power supply before mak-
ing electrical connections. Contact
with components carrying hazardous
voltage can cause electric shock and
may result in severe personal injury or
death.
Setup and Adjustments
T
he Sure-Set Model SSC series of switches
employ a unique method to set the oper-
ating set point of the device. The Sure-Set
Current Switch is designed to allow the
installer to select the operating setpoint
prior to opening the electrical enclosure.
Since the Sure-Set does not require cali-
bration on a powered and operating load,
the safety hazards and Personal Protec-
tive Equipment (PPE) required for protec-
tion against Arc-Flash are not necessary!
In fact, the installer or site engineer can
pre-set all Sure-Set Current Switches used
for a particular installation prior to deliver-
ing the parts to the job site. The installer
selects the proper Sure-Set model for
the application (230 VAC or 480 VAC) and
verifies the Motor HP for the system to be
monitored.
Select Operating Range
1. Verify the motor Full Load HP for the
system to be monitored.
2. Verify the motor operating voltage.
3. Verify that the proper Sure-Set model
was selected to monitor the motor
used in the system. (Sure-Set Current
Switches are available for 230 VAC
and 480 VAC motors both in standard
low and high HP ranges.)
4. Set the Sure-Set operating setpoint
to the motor Full Load HP by rotating
the range selector switch on top of
the Sure-Set to the proper motor HP
(see Fig. 2). The Sure-Set operating
setpoint is now set to properly moni-
tor the motor operation. No calibra-
tion on a live load is necessary.
65 (2-9/16)
69 (2-23/32)
27 (1-1/16)
Fig. 1 Model SSC
Dimensions
mm(in.)
Model SSC-2S/SSC-2H/SSC-4S/SSC-4H
Operation and Installation Instructions
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Fig. 2 HP Range Selector