28 • Recommended Wiring diagrams
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4.17
D.ADJ.:GENERATOR PARAMETERS Wiring
Notes:
•
When starting from a diesel generator make sure that its size is suitable.
Based on experience, the power (kW) of a diesel generator should usually exceed at least 1.8
times the power (kW) of the motor in order to enable consistent motor starts, consult the factory if
necessary. However this should be checked on a case by case basis.
•
When starting from a diesel generator, its voltage regulator (especially older type regulators) may
be affected during the starting process, thus causing rapid voltage fluctuations (~350V to ~500V in
400V systems). In these rare cases, the voltage regulator must be upgraded – consult your diesel
generator supplier.
•
When operating from mains and alternatively from a diesel generator, set normal starting
characteristics for mains and suitable parameters for the diesel generator in the DUAL
ADJUSTMENT setting. When starting from mains, the primary settings (suitable for main starting)
will be operative. Upon starting from a diesel generator, close the contact between the Control
Supply and terminal 8 to operate in D.ADJ.:GENERATOR PARAMETERS mode.
•
To operate D.ADJ.:GENERATOR PARAMETERS mode:
o
Set dip switch # 3 and dip switch #1 to on - refer to sections
o
Insert a contact (or jumper) between Control Supply and input terminal 8 (DUAL ADJUST)
and close contact to operate the D.ADJ.:GENERATOR PARAMETERS. Dual Adjust LED
will light.
o
Set the DUAL ADJUST parameters to the values necessary for the application (e.g., shorter
ACCELERATION TIME, lower CURRENT LIMIT, etc.). Refer to section
parameters settings.
Note
:
The D.ADJ.:GENERATOR PARAMETERS must not always be used when a diesel generator is
supplying the RVS-DN. Only use D.ADJ.:GENERATOR PARAMETERS when the normal starting
process fails, i.e. SHORTED SCR or WRONG CONNECTION faults occur,
and
only after you have
tested and are sure that the SCRs, motor and motor connections are not faulty.
When operating in D.ADJ.:GENERATOR PARAMETERS, the motor must be
loaded to avoid vibration during starting and stopping.
WARNINGS!
It is recommended to disconnect the power factor capacitors when operating
with a diesel generator.
