Issue:
PTC alarm installation
Product Line:
Altivar 61, Altivar 71
Environment:
All models, all serial numbers
Cause:
Using PTC probes for motor overload protection, requesting warning indication rather than faulting the VFD
Resolution:
PTC warning can be indicated via a relay output assigned to an Alarm Group.
Example for SW2 switch set to PTC, PTC connected to LI6, R2 indication, Alarm Group 1
1.8 Fault Management
PTC Management - activates the PTC monitoring
LI6 = PTC Probe [PTCL] = Always
Motor Thermal Prot - Inactivates the VFD internal I2T overload protection
Overload Fault Mgt [OLL] = Ignore
1.5 Inputs/Outputs CFG
R2 Configuration - assign relay R2
R2 Assignment [R2] = Alarm Grp1
Alarm Grp1 Definition - activate PTC alarm for the warning group
LI6 = PTC Alarm [PLA] = ON
Important note: When Overload Fault Mgt [OLL] = Ignore, the motor thermal protection by calculating the I2t is inactive. The drive will not provide motor overload protection based on motor current. Both functions can work at the same time by keeping Overload Fault Mgt [OLL] = Freewheel
PTC alarm installation
Product Line:
Altivar 61, Altivar 71
Environment:
All models, all serial numbers
Cause:
Using PTC probes for motor overload protection, requesting warning indication rather than faulting the VFD
Resolution:
PTC warning can be indicated via a relay output assigned to an Alarm Group.
Example for SW2 switch set to PTC, PTC connected to LI6, R2 indication, Alarm Group 1
1.8 Fault Management
PTC Management - activates the PTC monitoring
LI6 = PTC Probe [PTCL] = Always
Motor Thermal Prot - Inactivates the VFD internal I2T overload protection
Overload Fault Mgt [OLL] = Ignore
1.5 Inputs/Outputs CFG
R2 Configuration - assign relay R2
R2 Assignment [R2] = Alarm Grp1
Alarm Grp1 Definition - activate PTC alarm for the warning group
LI6 = PTC Alarm [PLA] = ON
Important note: When Overload Fault Mgt [OLL] = Ignore, the motor thermal protection by calculating the I2t is inactive. The drive will not provide motor overload protection based on motor current. Both functions can work at the same time by keeping Overload Fault Mgt [OLL] = Freewheel
Released for: Schneider Electric Saudi Arabia
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales enquiry online and an expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Centre
Find support resources for all your needs, in one place.
