Current Relay for DC- and AC-currents STW1000
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ZIEHL current-relays STW1000 have 4 measuring-ranges. They monitor most of the common AC- and DC-currents for over- or undercurrent. Currents up to 10 A can be connected directly to the STW. For higher currents external transformers (to inputs 1/5 A) or Shunts (input 60 mV) can be connected.
- Measuring inputs 1 A, 5 A, 10 A, direct or via transformer
- Measuring input 60 mV for ext. Shunt
- Automatic detection of AC/DC
- Monitoring of over- or undercurrent
- Adjustable range 10...100% IN
- Hy s teres i s adjus tabl e 5...50%
- Start-up delay 1...20s (input enable)
- Switching delay 0,1...10s for fading of short peaks
- Output-relay 2 changeovercontacts (co)
- Operating- or closed-circuitmode for relays selectable with bridge
| Design: | Mount in switchgear cabinet, Mount in circuit breaker box |
|---|---|
| Input/ Measured parameter: | Current measuring |
| Outputs: | Outputs/Relays |
| Product group: | Mains Monitoring |
| Supply voltage: | AC/DC 24-240 V |
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Zubehör
For currents >5A current monitors require a current transformer with secondary 1 or 5 A and a rated capacity of 1.5 VA. The primary rated current must be appropriate to the max. expected current (fuse). Tube ore wound current transformers can be used.For primary rated currents of 60 to 500 A we recommend using AS tube current transformers, suitable for the Cu-rail of 30 x 10 mm or 2 x 20 x 10 mm or round conductor of 28 mm. The transformers have Class 1 accuracy and a voltage resistance of up to 800 V. When ordering, please indicate desired primary and secondary rated current.
For currents >5A current monitors require a current transformer with secondary 1 or 5 A and a rated capacity of min. 1,5 VA. The primary rated current must be appropriate to the max. expected current (fuse). Tube or wound current transformers can be used. We recommend the use of WS tube current transformers for primary rated currents of 5 to 30 A.The transformers have a class 1 accuracy and a voltage resistance of up to 800 V.When ordering, please indicate desired primary and secondary rated current.
