Specifications

E - 10 Protections Ver: 0002
4. PROTECTION OF THE EXTERNAL BALLAST
RESISTOR
From software version 03.07 on, the Drive internally calculates the i
2
t to protect the Ballast
resistor of the Compact Modules (ACD and SCD).
If the Compact Module uses an External Ballast Resistor:
The Drive must know the electrical specifications of that external resistor through the following
parameters:
KP2 O (F1113) ExtBallastResistance
Function: It contains the ohm value of the External Ballast Resistor on a Compact Drive.
Valid values: 0..6K5 (0 by default)
KP3 O (F1114) ExtBallastPower
Function: It contains the power value of the External Ballast Resistor on a Compact Drive.
Valid values: 0..65 kw (0 by default)
KP4 O (F1116) ExtBallastEnergyPulse
Function: It contains the value of the energy pulse that can be dissipated through the External
Ballast Resistor on a Compact Drive.
Valid values: 0..65 kWs (0 by default)
KV40 (F1115) ExtBallastOverload
Function: It shows the % of overload on the External Ballast resistor for a Compact Drive. A
value greater than 100% at this variable will trigger error message 301.
If the Compact Module DOES NOT use an External Ballast Resistor:
The software knows the specifications of the resistors of each Compact Drive model and
monitors the i
2
t on its own.
Important: If any of the KP2, KP3 or KP4 parameters is set to "0", the i
2
t protection will
be carried out according to the characteristics of the internal resistors of
the modules.
Important: If all three parameters KP2, KP3 and KP4 are set to "65535" the i
2
t
protection will be disabled.