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Current-Relay STW20K

Manufacturer:

Ziehl

Manufacturer part number:

S225121
Delivery date: 12 business days

Current Relay for AC-Detection, AND-Evaluation, 3 Transformers, Housing type K for switch-gear cabinet mount

120.4 CAD
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Quantity
10+
20+
Price
109.2 CAD
96.6 CAD
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Products specifications
Brand ZIEHL
Country of origin Germany
Rated supply voltage AC/DC 24 - 240 V, AC 20 - 264 V, DC 20 - 297 V, < 1 W , < 4 VA
Overload capacity 100 A / 300 A
Ambient temperature range -20...+55 °C
Protection housing IP 30
Protection terminals IP 20
Applied standards UL/CSA

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 a 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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Description

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 a 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
Products specifications
Brand ZIEHL
Country of origin Germany
Rated supply voltage AC/DC 24 - 240 V, AC 20 - 264 V, DC 20 - 297 V, < 1 W , < 4 VA
Overload capacity 100 A / 300 A
Ambient temperature range -20...+55 °C
Protection housing IP 30
Protection terminals IP 20
Applied standards UL/CSA
Product tags