| Part Number: | CDT6 | - | ST | 2 | 10 | M |
|---|---|---|---|---|---|---|
| Explanation: |
Product Family CDT6 - DIN rail time relay |
Series ST - Star-delta motor starting timer |
Contact Arrangement 2 - Two changeover contacts for the star-delta sequence |
Contact Current Rating 10 - 10A contacts; AC-15 operational current 2.5A at 250VAC |
Power Supply M - 220VAC, 50–60Hz |
CDT6-ST controls the timed transition from star to delta in motor starting circuits. Separate knob settings provide a 0.1s to 10min star interval t1 and a 0.1–1s transition interval t2. The relay provides two changeover contacts in an 18mm-wide housing for 35mm DIN rail mounting.
At power-on, the star output closes for t1. It then opens, followed by the t2 transition gap before the delta output closes. Select the supply and contact version to match the starter control circuit. The application diagram shows the timer operating the star/delta contactor sequence.
| Field | Codes and meaning |
|---|---|
| Family | CDT6: DIN rail time relay |
| Series | ST: star-delta starting timer |
| Contact arrangement | 2: two changeover contacts |
| Contact rating | 10: 10A; 16: 16A |
| Supply | M: 220VAC; W: 12–240VAC/DC; Q: 380VAC; A–Z letter combinations: custom voltage. AC frequency is 50–60Hz. |
| Model | Changeover contacts | Contact rating | Supply |
|---|---|---|---|
| CDT6-ST210M | 2 | 10A | 220VAC |
| CDT6-ST216M | 16A | 220VAC | |
| CDT6-ST210Q | 10A | 380VAC | |
| CDT6-ST216Q | 16A | 380VAC |
All four common models provide the same star-delta starting function. The ordering guide additionally defines the W wide-range supply and custom supply choices; specify the complete code for the required version.
| Timing characteristic | Value |
|---|---|
| Star interval t1 | 0.1s to 10min |
| Transition gap t2 | 0.1–1s |
| Setting method | Front knobs |
| Setting accuracy / repeatability | 10% / 0.2% |
| Temperature influence | 0.05%/°C referenced to 20°C; equivalent to approximately 0.0278%/°F referenced to 68°F |
| Reset time | Maximum 200ms |
| Characteristic | Specified value |
|---|---|
| Function | Star-delta motor starting sequence |
| Supply terminals | A1–A2 |
| W supply | 12–240VAC/DC; 50–60Hz for AC |
| W consumption | 0.3–2VA on AC; 0.1–1.2W on DC |
| M / Q supply | 220VAC / 380VAC, 50–60Hz |
| M / Q consumption | Maximum 6VA / 1.3W |
| Supply tolerance | −15% to +10% |
| 10A contact version | Two changeover contacts, each 10A at 250VAC/24VDC |
| 16A contact version | Two changeover contacts, each 16A at 250VAC/24VDC |
| AC-15 operational current at 250VAC | 10A contact version: Ie 2.5A; 16A contact version: Ie 5A |
| Minimum switching power | 500mW |
| Power / output indication | Green LED / red LED |
| Mechanical / electrical life | 10,000,000 mechanical operations; 100,000 electrical operations with resistive load |
| Operating temperature | −20°C to +55°C |
| Storage / transport temperature | −35°C to +75°C |
| Mounting / orientation | 35mm DIN rail; any orientation |
| Protection / pollution degree | IP20 / 2 |
| Maximum altitude | 2000m |
| Conductors / tightening torque | One 2.5mm² conductor or two 1.5mm² conductors; 0.4N·m |
| Dimensions / weight | 90mm high × 18mm wide × 65mm deep; 80g |
The selection document lists CCC with GB/T14048.5 and CE with EN60947-5-1; certificate document numbers are available from CNTD. Match the timer supply and the contactor coil load to their applicable ratings.
The manufacturer requires specially designed equipment and written confirmation for high reliability energy systems, applications involving personal safety or major property risk, harsh or outdoor environments, fire or explosion risks, and military or aerospace use.
