Automationdirect.com Stellar SR44, User Manual

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Chapter 2: Electrical Installation
2.1 – Warnings & Agency Approvals
2.1.1 – Isolation
2.1.2 – Electrical Power and Control Supply Requirements
2.1.3 – Access
2.1.4 – Fuse Protection
2.1.5 – Agency Approvals
• CE
• RoHS
• UL – E333109
Caution: The SR44 uses semiconductor devices in the main circuit, and is not designed to provide
isolation. For this reason isolation means must be installed in the power supply circuit in accordance
with the appropriate wiring and safety regulations.
All electrical connections are made to power input and output terminals, control terminals, and a
ground stud. Before you apply control voltage to the control supply terminals, ensure that the control
voltage selector switch is set to the correct voltage being used. (The diagrams in section 2.5 show the
location of this selector switch.) Make electrical connections only to those terminals specified. If you
connect to other terminals, then you may cause damage to the SR44 internal control circuitry.
Do NOT install power factor correction capacitors on the output side of the SR44.
Caution: Always replace the cover on the Soft Starter after gaining access to the electrical
connections.
The Main Supply and the Control Supply each require protection. Although all units have electronic
overload protection for the Soft Starter, the installer should always install fuses for motor protection
between the Soft Starter and the Main Supply; NOT between the Soft Starter and the motor.
Semiconductor fuses can be supplied as an option for short-circuit protection of the semiconductors.
These fuses must be installed externally to the SR44 chassis to comply with UL standards. Chassis size
2 has the capability of installing fuses internally by replacing the fuse links in the power circuit. It is
the responsibility of the installer and system designer/specifier to ensure that the required standards or
regulations are not affected by so doing.
NOTE: SR44 soft starters have been discontinued. Please consider SR55 soft starters as a replacements.
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019
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