Take care to interference signal when one common speed pick-up is used for both Speed
governor and Controller. When some problems occur:
• check grounding connection from pick-up to controllers, disconnect ground
connection to one of them.
• use separate pick-up for Speed governor and Controller.
Controller indicates "Sd Underspeed" + "Pickup fault" after engine start when the pickup
signal is good for start and low speed but too strong for higher speed (loss of signal due to
RPM input saturation).
Increase gap between pickup and engine flywheel or change pickup type.
HINT
If RPM is measured from the generator voltage (Gear teeth = 0), controller can detect RPM
on no running gen-set when:
• Controller generator voltage terminals are opened (e.g. due to opening of fuse
switch)
• Non zero RPM causes controller “Not ready” state and engine start is blocked.
Active NPN pick-up sensor recommended connection
8.6. Voltage and current inputs
8.6.1. Measurement Wiring
WARNING!
Risk of personal injury due to electric shock when manipulating voltage terminals under
voltage! Be sure the terminals are not under voltage before touching them.
WARNING!
Do not open the secondary circuit of current transformers when the primary circuit is closed!!!
Open the primary circuit first!
Use 1.5 mm
2
cables for voltage connection and 2.5 mm
2
for current transformers
connection.
Adjust nominal voltage, nominal current, CT ratio and PT ratio by appropriate setpoints in the
Basic Settings group.
VOLTAGE MEASUREMENT WIRING
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