SECTION 8
ELECTRICAL SYSTEM
July 2003
p. 8-1
05130703
Section 8 ELECTRICAL SYSTEM
8 Features
The electrical system contains all functions necessary for turnkey
operation. This includes the control and starter panel, intensifier
reversal circuit.
The electrical enclosure, buttons, lights, and electrical harnesses into
and out of this enclosure can be exposed to occasional water spray and
dust per NEMA-12 standards.
8.1 Electrical Overview
There is only one electric motor on the SL-IV Waterjet Pump. The control
voltage of 24vdc is furnished by the built-in power supply drawing its
power from the motor’s AC circuit.
8.1.1 Motor Starter Circuit
The SL-IV 11 kW (15hp) Waterjet Pump is powered by a standard Wye-
delta starter circuit. The built in starter circuit includes the following:
• Manual disconnect with door handle interlock
• Over current protection
• Thermal overload devices.
• The hydraulic circuit automatically unloads hydraulic pressure to
allow the motor to achieve full speed for approximately 2 seconds.
• The motor is also provided with terminal blocks for wire termination
8.1.2 Control Circuits and Logic
In order to prevent costly damage to the pump, automatic shutdown logic
functions through the electrical circuits to shut down the pump.
• Low hydraulic reservoir level
• High hydraulic oil temperature
For more information on these conditions and recovery procedures, refer
to Section 3, Operation, of this manual.
The following terminal blocks are provided in order to interface with the
remote operator’s station:
• Start
• Stop
• Emergency Stop (E-Stop)
• Pump RUN indicator light
• Pump malfunction light
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