Current relay Type STW81V
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The basic function of the device is to detect whether a current is flowing in the supply line of one of several woodworking machines. If a current flow is detected, the device opens a valve on the machine's suction channel. At the same time, the extraction system is switched on. When a machine is switched off, the device closes the associated valve with a delay. If the last machine is switched off, the extraction system also stops after a delay.
The current relay STW81V is an 8-channel AC current relay, designed for controlling of suction plants e.g. in the timber and plastics processing industry. When there is an AC-current >1A through one of up to 8 connected transformers type STWA1, the appropriate relay K1...K8 (1 x co) picks up and opens the slide valve of the machine. At the same time the relay K9 starts the central suction.
Relays K1...K8 switch off 10s after the current flow through the appropriate transformer is 0. K9 switches off 0...60s (adjustable) after the current in all transformers is 0.
Application
The current relay STW81V is particularly suitable for the central control of slide valves in suction plants, which are to be operated dependent on operating condition of individual machines. It can control a central suction at the same time.
- single evaluation of 8 inputs with STWA1
- single evaluation of 8 inputs with current-sensor S1
- inputs for 8 potential-free contacts
- OR-evaluation of all circuits (K9)
- 9 output relays
- LED display for relays / inputs
- Switching point adjustable 0,5 - 5 A
- switch-off delay of K9 adjustable 0 - 60 seconds
- switch-off delay single relays 10 s
- last relay: K9 + 20 s
| Applications: | Controils for suction plants |
|---|---|
| Approval: | EU / UKCA-Declaration of Conformity |
| Design: | Mount in switchgear cabinet, Mount in circuit breaker box |
| Input/ Measured parameter: | Current detection yes/no, Digital input |
| Outputs: | Outputs/Relays |
| Product group: | Switching Relays and Controls |
| Supply voltage: | AC/DC 24-240 V |
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You found a device in that meets your requirements and you want to install it in a control panel or in the door of a control cabinet?With the installation frame of the ER series, this is possible for all ZIEHL devices in housings V4, V6 and V8 (width 70/105/140 mm).Enclosed by a high-quality frame made of anodized aluminum, all displays can be read outside the control cabinet. Switches, buttons and joystick can be operated.
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
