Wiring Diagrams – Diesel Generator
14
Starting from Diesel-Generator
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
N
22
23
24
28
29
30
31
32
M
UVW
L1
b
L2
b
L3
b
L1 L2 L3
Start Stop
Line
Contactor
Bypass
Contactor
Dual adjust
Generator Mode
Dip. Sw. S1
Off
End Of Acceleration
1. When starting from a Diesel-Gen., its voltage regulator (especially older type regulators) may be affected during the
starting process, causing rapid voltage fluctuations (~350V to ~500V in 400V systems). In these rare cases, the voltage
regulator must be upgraded – consult your Diesel-Gen. Supplier.
2. In most other cases where voltage, current or frequency is unstable – a special routine may be applied to overcome the
starting difficulty. Use the procedure below:-
a. Set Dip. Switch # 3 to “On” (as shown above).
b. Insert a contact (or jumper) between Control Supply and terminal 8 (Dual Adjust. Terminal) and close contact to
operate the Generator Mode. Dual Adjust LED will light when operating in Generator Mode.
c. Set Dual Adjust parameters to the values necessary for the application (e.g. faster acceleration, lower current limit,
etc.).
3. When operating from Main and alternatively from Diesel Gen. Set normal starting characteristics for Main and
suitable parameters for the Diesel Gen. in the Dual Adjustment setting. When starting from Main, the primary settings
(suitable for main starting) will be operative. Upon starting from Generator, close contact between Control Supply and
Terminal 8 to operate on Generator Mode.
Note: Ensure that Diesel Gen. size is suitable (Diesel Gen. KVA should be at least is 1.35 motor KVA, consult
factory for all other cases).
WARNING
1. Motor can not run idle and must be loaded when operating in Generator Mode, otherwise vibration may
occur during starting and stopping.
2. When using extended range, use maximum precaution to avoid motor or starter burnout.
3. Disconnect all other loads before starting for the first time to prevent damages due to voltage fluctuations.
4. Disconnect Power Factor Capacitors when operating with Diesel Gen.
5. Connect terminal 21 to terminals 3 and/or 9 only if these terminals are connected to neutral or at ground
potential.
6. Only potential free contacts may be connected to terminal 21. Do not connect any voltage to terminal 21.
Any connection of voltage to this terminal may disrupt soft-starter operation, and cause starter or motor
damage.
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