- 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.
- 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
Thông số kỹ thuật
- Power supply Us.......AC/DC 24 - 240 V, 0/50/60 Hz, < 1 W, < 4 VA; (DC 20 - 297 V, AC 20 - 264 V)
- Output relay.......2 CO
- Type of contact.......type 2 see general technical informations
- Function.......3 channel/AND
- Transformer input.......1 to 3, type STWA 1
- Overload cap.continous/max 10s.......100 A / 300 A
- Switching point on.......≤ AC 1 A
- Switching point off.......≥ AC 0,3 A
- Tolerance.......± 20%
- Switch-off delay.......approx. 0,3 s
- Switch-on delay.......approx. 0,3 s
- Testing conditions.......see general technical informations
- rated ambient temperature range.......-20°C…+55°C
- Dimensions H x B x T.......Design K: 75 x 22,5 x 110 [mm], 12-pol
- Protection housing / terminals.......IP 30 / IP 20
- Weight.......approx. 120 g