Current-Relay Typ STW1K
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- Current detection: The automatic start-up system is equipped with current relays that monitor the current flow in the supply lines of the machines. These relays are configured in an OR circuit with up to eight inputs. As soon as a current of more than 1 ampere flows through one of the connected current transformers, the built-in relay picks up and activates the extraction system.
- Automatic control: If at least one machine is switched on and draws current, the extraction system is activated automatically. This ensures that dust and chips are extracted immediately, keeping the working environment clean and safe.
- Delayed switch-off: As soon as all machines are switched off and no more electricity is flowing, the relay drops out with a delay of around 10 seconds. This delay time allows the extraction system to remove any remaining particles from the air before it is switched off.
- 8 inputs
- OR-evaluation
- relay picks up if at least 1 input is activated
- Connection of current transformers STWA1 or STWA1H
- operating value approx. 1 A
- turn-off delay approx. 10 s
- not necessary inputs remain open
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Zubehör
The STWA1 current transformer is made to match the STW current monitor. One current transformer is required for each line being monitored. The STWA1 consists of a climate-proven sealed-in coil with toroidal tape core. The connection cables are permanently fixed to the transformer and are 1 m in length. The level of the current to be monitored is limited to 100 A continously, 300 A for max. 10s.In case of current of more than approx. 5 A, an LED can be triggered directly via the STWA 1 current transformer. Thus it's easy for users to visually monitor the current conduction in a line. The LED is protected by an anti-parallel diode or by its connection in series. A protective resistor is necessary depending on the LED used or the level of current being monitored.Weight: approx. 43 g
The STWA1H current transformer is made to match the current-relays for recognition of AC-current and for controls for deducting plants type STW. Above app. 2 A the built-in LED lights and indicates a current. A current-relay type STW or a LED can be connected to the terminals.The STWA1H has been designed for mounting in a switchgear cabinet. The housing can be fixed on a DIN-rail or with 2 screws. The maximum diameter of the monitored line is 11 mm. The current is only limited by the diameter that can be lead through the transformer. The electrical connection is made via screwless pluggable terminals.connection to current-relays type STWindication with LED from app. 2 Aindication of shortest current-pulsesBuilt-in resistor to protect LEDno supply-voltage requiredelectrical connection via screwless pluggable terminalsplug-in current transformer (Ø 11 mm)
