Setra Systems SSC-2S Operation And Installation Instructions

Model SSC-2S/SSC-2H/SSC-4S/SSC-4H
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.
Dimensions
mm(in.)
65 (2-9/16)
Fig. 1 Model SSC

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.
2.
3.
4.
27 (1-1/16)
Verify the motor Full Load HP for the
system to be monitored.
Verify the motor operating voltage.
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.)
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.
Fig. 2 HP Range Selector