Frequently Asked Questions
The part numbers are L11/25 for the neutral link and L11/25R for the active link.
LXD1B7 is the part number of the spare coil to suit LC1D25B7 contactor. For further information on the coil, please refer to the attached datasheet.
LC1D25BD is the correct part number
Identifying the difference between LAD4TB and LAD4TBDL
IEC contactors and starters
Products sold and used in the United States
Identifying the difference between two similar part numbers
The LAD4TB is for 24V AC coils for the Tesys Series LC1D09 through LC1D38 contactors when supplied with G7 voltage code. The LAD4TBDL is 24 vdc bi-directional diode offered as a replacement if for some reason the diode supplied with the Tesys LC1D09 through LC1D38 contactors when ordered with BD or BL voltage code breaks or is no longer working.
What is the altitude derating for a TeSys D-Line contactor?
Digest 177 Section 18 : Contactors and Starters, IEC
North American Products
The contactors are fully rated up to 3000 meters. Following are derating multipliers for altitudes above 3000 meters for both voltage and current:
3500m x 0.90
4000m x 0.80
4500m x 0.70
5000m x 0.60
3500m x 0.92
4000m x 0.90
4500m x 0.88
5000m x 0.86
For example, an LC1D80 at 5000 meters:
- The maximum rated operational voltage is 1,000V (IEC947-4) and 690V (UL/CSA). At 5000 meters it becomes 1000V x 0.6 = 600V (IEC947-4) and 690V x 0.6 = 414V (UL/CSA).
- The maximum rated operational AC3 current is 80A. At 5000 meters it becomes 80A x 0.86 = 68A.