Frequently Asked Questions
The replacement part code is CAD50U7
Checking on the DC current contact ratings for the CAD50, CAD32, CAD503, CAD323, CAD506, and CAD326 relay.
CAD Industrial Relays
Relays and Timers
125V DC - 0.55 Amps make and break, 2.5 Amps cont.
250V DC - 0.27 Amps make and break, 2.5 amps cont.
600V DC - 0.10 Amps make and break, 2.5 Amps cont.
Following are the differences between the LC1D50U7 and the LC1D50AU7:
LC1D50AU7 has everlink terminals.
LC1D50AU7....is slightly larger case and accommodate LRD3XX overloads
LC1D50U7 contactors accommodate LRD33XX overloads.
Identifying power terminal lug data for the D2 style contactors
Tesys D line contactors
Products sold and used in the United States
Power terminal lug data required
For contactors with screw clamp terminals:
stranded cable w/o cable end : One #10-3 AWG or Two #10-4 AWG per terminal.
stranded cable w/cable end: One #10-4 AWG or Two #12-2 AWG per terminal.
solid cable: One #10-3 AWG or Two #10-6 AWG per terminal.
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.
Identifying maximum voltage of an LC1D contactor
TeSys D Contactors
IEC contactors and starters used in North America
IThe maximum voltage per UL and CSA is 600VAC.
Part no LE3AC075N7 consists Two of LC1D80U7 and one of LC1D50U7 contactors.
Is the coil on CAD50BL polarity sensitive?
Tesys D IEC Style Relays
Determine if relay will work for a specific application.
Yes, the DC coil is polarity sensitive - A1 is positive and A2 is negative.
The equivalent for CS722E240 Sprecher Schuh Relay is a CAD32U7 or LC1D098U7 can be used.
Safety category listing of CAD TeSys relays
TeSys D Relays
The Tesys CAD32** and the CAD50** relays and top mounted adder decks have positively guided or linked contacts. Therefore the contacts meet IEC EN60947-5-1 and are approved to use in safety systems through category 4.