Fourgroup Simplex-Up, Руководство по использованию и установке

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13
EXAMPLE OF CURRENT PROTECTION FOR A THREE PHASE MOTOR:
Suppose that we want to set the Protection from Overload for a three phase motor of
5,5kW (7,5Hp) with a Nominal Supply Current of about
12 A .
CALIBRATION STEPS:

Override the current protection cut-in delay time by CONNECTING the ESC.TIM.TA
JUMPER, after motor start;

Set the maximum value with the internal regulator on the “Protection tripping
current” panel (turn clockwise)

Turn the motor on and, with the “ Protection tripping current” regulator, reduce
until the red “Motor Protection” LED comes on and the motor stops; (THIS SHOULD
CORRESPOND APPROXIMATELY TO THE RATED CURRENT… 12A);

Increase the “Protection tripping current” adjustment by approximately 10-20% of
the previously set value. (AT APPROX. 15a)

Reset the Protection Cut-in Delay by REMOVING the ESC.TIM.TA JUMPER; ( the
delay is used to allow for the initial inrush currents) ;

At this point the protection is set and the control panel can be set for the desired
type of operation: EMPTYING – FILLING.
The Motor overload cut-out can be overridden by SETTING the internal DIP-SWITCH 4
TO OFF POSITION (
AMP. PROTECTION CUT-OUT OVERRIDEN):
In this way the protection cut-in will be signalled by the “ Motor protection enabled”
light, but the motor will not be blocked.
WARNING
The MOTOR can be switched off in the following ways:
- In “manual”, the motor stops when the “MANUAL” button is released;
-
In “automatic”, the motor stops when the G1 switch is no longer enabled or
when the level sensors, if used, give a max./min. level alarm based on how
the dip-switches 1 and 2 has been set or by pushing the “0 – RESET”
button;
-
Turning the general switch with door interlock to “0”.
9b. REGULATION AND CALIBRATION
10. STOP OF THE PUMP