Manual 26076 EGCP-2 Engine Generator Control Package
Woodward 13
NOTE
Do not tin (add solder to) the wires that terminate at the EGCP-2 terminal
blocks. The spring-loaded CageClamp terminal blocks are designed to
flatten stranded wire, and if those strands are tinned together, the
connection loses surface area and is degraded.
Grounding for Protection Against Electric Shock
Protective Earth (PE) must be connected to the termination point on the back
side of the unit next to the label with e symbol (or 1 of 3 other like
termination points without label) to reduce the risk of electric shock. This
connection will be made using a thread forming screw (M4 x 6mm). The
conductor providing the connection must have a properly sized ring lug and wire
larger than or equal to 3.0 mm² (12 AWG).
Recommended Grounding Practices
Providing the proper ground for the EGCP-2 is important. Improper connection of
the EGCP-2 chassis to the ground plane may lead to stray currents between the
reference point for the AC signal sources (current and voltage transformers), and
the reference point for the sensing inputs on the EGCP-2. Differences in potential
between these two points results in equalizing current flow which then produces
unacceptably high common mode voltages. Common mode voltages may result
in improper readings for the sensed AC inputs, or even damage to the EGCP-2
product in extreme cases. To minimize this problem, it is necessary to provide a
low resistance path between the AC signal reference point, and the chassis of
the EGCP-2. Typically this point is the designated ground for the generator set
and related instrument transformers.
Back of EGCP-2
TB 1 TB 2 TB 3 TB 4
TB 5 TB 6 TB7 TB8 TB9
EGCP-2 chassis ground
lug connection point (4)
Generator
Ground Bonding Conductor
VIS-144
00-8-23
Figure 3-2. Recommended Single Point Grounding Scheme
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