Description
CKG3 7.2kV AC Vacuum Contactor Overview
The CKG3 7.2 kV AC vacuum contactor range includes 160 A, 250 A, 400 A, and 630 A variants. The published data covers frequent switching duty, making and breaking capability, insulation withstand levels, mechanical life, and installation conditions for each current option.
Operating Conditions
- Ambient temperature: -10°C to 40°C
- Installation altitude: up to 1,000 m for the ordinary type or 4,000 m for the plateau type
- Maximum monthly average relative humidity in the wettest month: 90%
- Condensation caused by temperature changes must be considered
- No obvious shock or vibration
- No explosion hazard or gas and dust sufficient to corrode insulation
- Installation location protected from rain and snow
Variant Ratings
| Parameter | 160 A | 250 A | 400 A | 630 A |
|---|---|---|---|---|
| Main-circuit rated voltage | 7.2 kV | 7.2 kV | 7.2 kV | 7.2 kV |
| Main-circuit making capacity, 100 operations | 1,600 A | 2,500 A | 4,000 A | 6,300 A |
| Main-circuit breaking capacity, 10 operations | 1,280 A | 2,000 A | 3,200 A | 5,000 A |
| Ultimate breaking capacity, 3 operations | 3,200 A | 4,000 A | 4,500 A | 6,300 A |
Common Service Data
| Parameter | Published value |
|---|---|
| Mechanical life | 1,000,000 operations |
| Mechanical-lock life | 100,000 operations |
| Main-circuit power-frequency withstand voltage | 32 kV |
| Auxiliary-circuit power-frequency withstand voltage | 2.5 kV |
| Control-circuit power-frequency withstand voltage | 2 kV |
| Rated operating frequency | 300 operations/hour |
| Mechanical-lock operating frequency | 30 operations/hour |
| Contact opening | 4 ± 0.5 mm |
| Overtravel | 1.5 ± 0.3 mm |
Application and Selection
The current product information identifies motor control and repeated circuit switching as intended duties. Select the rated current together with the required making and breaking capability, control arrangement, operating frequency, installation altitude, and environmental conditions.
Information for an Inquiry
Provide the 7.2 kV circuit current, load type, required switching frequency, control voltage, mechanical-lock requirement, installation altitude, and ambient conditions.
FAQ
Which current ratings are listed for the CKG3 7.2kV contactor?
What is the rated operating frequency?
What mechanical-life values are listed?
Which altitude options are specified?
What should be provided for selection?
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