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Manufacturer: ZIEHL

STW20K - Current Relay - S225121

  • S225121
  • Product Type IP00 motor, IP20 electronics
  • Supply voltage AC/DC 24 - 240 V
  • Execution Motor IP44, electronics IP20 / depending on mounting and position
  • Certificate IP 30 (IP 44, with bracket and cover)
  • Output function Outputs/Relays
  • Measured value Pressed semi-finished product made of steel sheet, sprayed with PP plastic

The current relay STW20K monitors the current in up to 3 lines with current transformers STWA1 (AND circuit). If there is a current in all 3 monitored lines, the relay (2 change-over contacts) picks up. If there is no current in at least one of the lines, the relay releases. The relay works in closed circuit current. When voltage is applied to the STW, the relay signals an alarm until the it has picked up.

Applications

Identifies power failure with 1- or 3-phase electrical consumers, e.g. with monitoring of heating elements or heating installations where a constant heating has to be guaranteed.

A further application is the identification of phase failure, monitoring of fuses, or triggering of operating hours counters.

If the switching threshold is not reached due to low currents of less than 1 A, the monitored wire should be led multiple times through the transformer. Not required inputs have to be connected to an occupied input.

Features

  • 3 current transformers STWA1
  • AND-evaluation
  • relay output 2 CO
  • Switching point approx. AC 1 A
  • LED-display for power on and alarm
  • housing design K
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  • Product Type IP00 motor, IP20 electronics
  • Supply voltage AC/DC 24 - 240 V
  • Execution Motor IP44, electronics IP20 / depending on mounting and position
  • Certificate IP 30 (IP 44, with bracket and cover)
  • Output function Outputs/Relays
  • Measured value Pressed semi-finished product made of steel sheet, sprayed with PP plastic

The current relay STW20K monitors the current in up to 3 lines with current transformers STWA1 (AND circuit). If there is a current in all 3 monitored lines, the relay (2 change-over contacts) picks up. If there is no current in at least one of the lines, the relay releases. The relay works in closed circuit current. When voltage is applied to the STW, the relay signals an alarm until the it has picked up.

Applications

Identifies power failure with 1- or 3-phase electrical consumers, e.g. with monitoring of heating elements or heating installations where a constant heating has to be guaranteed.

A further application is the identification of phase failure, monitoring of fuses, or triggering of operating hours counters.

If the switching threshold is not reached due to low currents of less than 1 A, the monitored wire should be led multiple times through the transformer. Not required inputs have to be connected to an occupied input.

Features

  • 3 current transformers STWA1
  • AND-evaluation
  • relay output 2 CO
  • Switching point approx. AC 1 A
  • LED-display for power on and alarm
  • housing design K
Less
Read more
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