4.1
SECTION 4, ELECTRICAL SYSTEM
GENERAL INFORMATION
The power connection to the machine is made to the L1, L2 and L3 terminals of the junction block (See Section 1). The
M-16 / 20 is set to run on three phase voltage as indicated on the serial plate and the voltage label.
This machine has been built to the customers requirements, however, if any voltage changes are required, refer to the
information on the following pages and then consult Hyd-Mech service department before implementing any changes.
INITIAL START-UP
At initial hook-up it is important to check that the phase order is correct. This is indicated by the blade drive wheel revolv-
ing in a counter clockwise direction and the hydraulic pressure gauge registering a pressure rise.
NOTE:
1. The PLC is equipped with a lithium battery to keep the program stored while the power is shut down. The battery
will need to be replaced every 3 to 5 years, depending on usage. A visual warning will be displayed on the inter-
face when the battery drains to a certain level. Batteries can be purchased through your Hyd-Mech Distributor.
2. If the machine is equipped with an inverter, do not turn disconnect on for 3 three minutes after disconnect has
been shut off. Cycling power sooner than 3 minuets will result in damage to the Variable Frequency Drive.
EARTH GROUNDING PROCEDURE
1. Customer to provide and install a ground rod approx. .60 (15mm) diameter, copper clad steel, to be driven no less
than 8’ (2.5m) into the ground, no more than 10’ (3m) away from control enclosure.
2. Ground rod to be connected to customer’s in plant ground system. This connection shall be made directly at the
ground rod. (If applicable).
3. It is desirable that the overall resistance to ground measured at the ground rod does not exceed 3 ohms. Cus-
tomer is advised to consult local power company for further information on grounding.
4. Ground rod to be connected to ground terminal in control enclosure using insulated, stranded 6 gauge copper
wire.
5. An additional point to check is ensuring continuity of ground within control enclosure. Start with main power
entrance ground terminal where internal ground conductors should originate and connect to, DIN terminal strip,
control transformer and the lid of control enclosure. Also PLC and Interface units should have their own ground
conductors connected to one of the main ground terminals.
6. Properly functioning ground system will;
• provide safety for personnel.
• ensure correct operation of electrical/electronic devices.
• prevent damage to electrical/electronic apparatus.
• help dissipate lightning strokes.
• divert stray radio frequency (RF) energy from electronic/control equipment.
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