Fuse protection for 24 V DC circuits Contents Fuse protection for 24 V DC circuits Fuse protection for 24 V DC circuits Overview C.2 WAVEGUARD C.4 C 2003670000 C.1 Fuse protection for 24 V DC circuits Fuse protection for 24 V DC circuits – Overview Fuse protection A 24 V DC control voltage has become the standard in the automation industry. Selective fuse protection is often used when the power is being supplied by PLC-guided controllers. It divides the total load into separate, logically connected safety circuits. For example, the CPU, actuators and sensors can be separated in the load circuits. This selective load protection helps to decrease facility downtime and also to simplify troubleshooting. When a disruption (short circuit) occurs on a standard protective system, the entire power supply is interrupted. In a system using selective fuse protection, only the fuse in the one disrupted load circuit is triggered. If the fuse is triggered quick enough so that other loads (and particularly the CPU) can continue functioning properly, then various control algorithms can be used to deal with the disruption. It is then possible to shut down the facility in an orderly and controlled fashion. C A fundamental problem when using ordinary fuses is that they take a relatively long time to trigger. Usually, a C.2 switched-mode power supply is already well over the surgecurrent limit (typically 120 % of Inom) before its fuse triggers. Ordinary fuses are therefore not suitable for constructing a selective fuse protective system. Such systems present DC fuses with special challenges. They must be able to switch off quickly enough but they must also be able to tolerate the start-up surge currents from consumer loads. Weidmüller‘s electronic fuses, from our established WAVEGUARD line, are the answer to both of these challenges: they are quick acting but can also tolerate start-up currents. You can easily implement selective load protection using our WAVEGUARD models. In addition, Weidmüller‘s electronic fuses feature a floating alarm contact and a reset input. This allows a PLC controller to query the status of the fuse or to perform an automated reset after troubleshooting. This provides you with a convenient method for remotely maintaining a complex facility. As a result, you save both time and money. 2003670000 Fuse protection for 24 V DC circuits Fuse protection for 24 V DC circuits – Overview Resetting The WAVEGUARD family can be reset manually or by using an external signal. They can be reset remotely by simply applying a 24 V signal pulse on the reset input. The reset occurs on the falling edge of the signal. Note: A cyclical automatic reset is not permitted and can lead to a malfunction. BLOCK DIAGRAM WAVEGUARD INPUT 24 V Reset (8) (1) (9) gn 24 V fail C re (2) 0V OUTPUT (7) (3) NC contact 50 Vuc/0.05A Signalling A red LED displays when the electronic fuse has been triggered. An alert is also sent out over a floating alarm contact. A green LED signals that the unit is switched on. The alarm contact uses an NC contact. WAVEGUARD 2003670000 C.3 Fuse protection for 24 V DC circuits WAVEGUARD INPUT 24 V Reset C 24 V DC 3.15 A 24 V DC 1.6 A 0V (8) (1 ) (9 ) gn rt OUTPUT 24 V fail (7 ) (2 ) (3 ) NC contact 50 V uc /0.05 A Current (A ) Current (A ) 20 18 16 14 12 10 8 6 4 2 0 24 22 20 18 16 14 12 10 8 6 4 2 0 Time ( m s ) 0 20 40 60 80 10 0 12 0 14 0 T i m e ( m s) 0 10 15 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 16 0 Technical data Input Rated control voltage Rated current Reset Output Status relay / CO contact Signalling delay General data Ambient temperature (operational) Storage temperature Status indication Standards EMC standards Sliding switch Approvals Dimensions Clamping range (nominal / min. / max.) Depth x width x height Note mm² mm Ordering data Screw connection Tension-clamp connection 24 V DC 1.6 A Impulse > 100 ms +24 V, falling edge ON 24 V DC 3.15 A Impulse > 100 ms +24 V, falling edge ON NC contact, max. 50 V / 0.05 A; for low voltage only! 3.5 ms typ. NC contact, max. 50 V / 0.05 A; for low voltage only! 3.5 ms typ. 0 °C...55 °C -20 °C...85 °C LED green: OK, LED red: tripped DIN EN 50178 EN 55011, EN 61000-6-1, 2, 4 OFF - wait 10 s - ON; on / off cCSAus; CE; cURus; EAC; GOSTME25 0 °C...55 °C -20 °C...85 °C LED green: OK, LED red: tripped DIN EN 50178 EN 55011, EN 61000-6-1, 2, 4 OFF - wait 10 s - ON; on / off cCSAus; CE; cURus; EAC; GOSTME25 2.5 / 0.5 / 2.5 1.5 / 0.5 / 2.5 92.4 / 22.5 / 72 92.4 / 22.5 / 72 Periodic auto-reset not permitted; Tu=23 °C,Tension single module Screw connection clamp connection 2.5 / 0.5 / 2.5 1.5 / 0.5 / 2.5 92.4 / 22.5 / 72 92.4 / 22.5 / 72 Periodic auto-reset not permitted; Tu=23 °C,Tension single module Screw connection clamp connection Type WGS 24Vdc 1,6A WGZ 24Vdc 1,6A Type WGS 24Vdc 3,15A WGZ 24Vdc 3,15A Qty. 1 1 Order No. 8618890000 8621040000 Qty. 1 1 Order No. 8618910000 8621030000 Note Accessories Note C.4 Supply voltage +24 V and 0 V can be cross-connected with ZQV 2.5 N/2 Supply voltage +24 V and 0 V can be cross-connected with ZQV 2.5 N/2 2003670000 24 V DC 6.3 A INPUT 24 V Reset 0V (8) (1 ) (9 ) gn rt 24 V fail (7 ) (2 ) (3 ) 24 V DC 8 A Current (A ) Current (A ) OUTPUT NC contact 50 V uc /0.05 A 26 24 22 20 18 16 14 12 10 8 6 4 Time (ms) 0 10 Fuse protection for 24 V DC circuits WAVEGUARD 15 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 65 60 55 50 45 40 35 30 25 20 15 10 5 C Time (ms) 0 5 10 15 20 25 30 35 40 45 50 Technical data Input Rated control voltage Rated current Reset Output Status relay / CO contact Signalling delay General data Ambient temperature (operational) Storage temperature Status indication Standards EMC standards Sliding switch Approvals Dimensions Clamping range (nominal / min. / max.) Depth x width x height Note mm² mm Ordering data Screw connection Tension-clamp connection 24 V DC 6.3 A Impulse > 100 ms +24 V, falling edge ON 24 V DC 8A Impulse > 100 ms +24 V, falling edge ON NC contact, max. 50 V / 0.05 A; for low voltage only! 3.5 ms typ. NC contact, max. 50 V / 0.05 A; for low voltage only! 3.5 ms typ. 0 °C...55 °C -20 °C...85 °C LED green: OK, LED red: tripped DIN EN 50178 EN 55011, EN 61000-6-1, 2, 4 OFF - wait 10 s - ON; on / off cCSAus; CE; cURus; EAC; GOSTME25 0 °C...55 °C -20 °C...85 °C LED green: OK, LED red: tripped DIN EN 50178 EN 55011, EN 61000-6-1, 2, 4 OFF - wait 10 s - ON; on / off cCSAus; CE; cURus; EAC; GOSTME25 2.5 / 0.5 / 2.5 1.5 / 0.5 / 2.5 92.4 / 22.5 / 72 92.4 / 22.5 / 72 Periodic auto-reset not permitted; Tu=23 °C,Tension single module Screw connection clamp connection 2.5 / 0.5 / 2.5 1.5 / 0.5 / 2.5 92.4 / 22.5 / 72 92.4 / 22.5 / 72 Periodic auto-reset not permitted; Tu=23 °C,Tension single module Screw connection clamp connection Type WGS 24Vdc 6,3A WGZ 24Vdc 6,3A Type WGS 24Vdc 8,0A WGZ 24Vdc 8,0A Qty. 1 1 Order No. 8618930000 8621020000 Qty. 1 1 Order No. 8618940000 8621010000 Note Accessories Note 2003670000 Supply voltage +24 V and 0 V can be cross-connected with ZQV 2.5 N/2 Supply voltage +24 V and 0 V can be cross-connected with ZQV 2.5 N/2 C.5 Fuse protection for 24 V DC circuits WAVEGUARD 24 V DC 0.5...5 A INPUT 24 V Reset C 0V (8) (1 ) (9 ) gn rt OUTPUT 24 V fail (7 ) (2 ) (3 ) NC contact 50 V uc /0.05 A Technical data Derating curve Input Rated control voltage Rated current Reset Output Status relay / CO contact Signalling delay General data Ambient temperature (operational) Storage temperature Status indication Standards EMC standards Sliding switch Approvals Dynamic tripping characteristic 24 V DC 0.5...5 A adjustable Impulse > 100 ms +24 V, falling edge ON Tripping current: 0.5 A Tripping current (A) 25 20 15 10 5 0 0 20 40 NC contact, max. 50 V / 0.05 A; for low voltage only! 3.5 ms typ. 0 °C...55 °C -20 °C...85 °C LED green: OK, LED red: tripped DIN EN 50178 EN 55011, EN 61000-6-1, 2, 4 OFF - wait 10 s - ON; on / off cCSAus; CE; cURus; EAC; GOSTME25 mm² mm Ordering data Screw connection Tension-clamp connection 80 100 120 140 60 80 100 120 140 Time (ms) Tripping current: 5.0 A Tripping current (A) 25 20 15 10 5 0 0 20 40 Dimensions Clamping range (nominal / min. / max.) Depth x width x height Note 60 Time (ms) 2.5 / 0.5 / 2.5 1.5 / 0.5 / 2.5 92.4 / 22.5 / 72 92.4 / 22.5 / 72 Periodic auto-reset not permitted; Tu=23 °C,Tension single module Screw connection clamp connection Type WGS 24Vdc 0.5...5A WGZ 24Vdc 0.5...5A Qty. 1 1 Order No. 8710270000 8727630000 Note Accessories Note C.6 Supply voltage +24 V and 0 V can be cross-connected with ZQV 2.5 N/2 2003670000