Selected parameters OUTPUT SIGNAL 1 relay SETPOINTS 2, adjustable MONITORED VARIABLE Power and power factor monitoring Others SIZE 36 mm POWER SUPPLY RANGE 380÷415 VAC MONITORING FUNCTION PF monitoring MOUTING Plug-in INPUT RANGE 0.1-0.99 DELAY 1, adjustable
Monitoring Relays 3-Phase LoadGuard Types DWB01, PWB01 DWB01PWB01 • TRMS load guard relays for three phase balanced applications • Measuring if the power factor is within set limits • Measure their own power supply • Measuring ranges: 5A, 10A, MI current transformers • Power ON delay 1 to 30 s knob adjustable • Separately adjustable upper/lower level on absolute scale • Programmable latching or inhibit at set level • Automatic and manual start and stop of the system • Output: 8 A SPDT relay N.D. or N.E. selectable • For mounting on DIN-rail in accordance with DIN/EN 50 022 (DWB01) or plug-in module (PWB01) • 45 mm Euronorm housing (DWB01) or 36 mm plug-in module (PWB01) • LED indication for relay, alarm and power supply ON Product Description Ordering key DWB 01 C M48 10A DWB01 and PWB01 are precise TRMS power factor monitoring relays for 3- phase balanced systems. They can be used for moni- toring the actual load of asynchronous motors and other symmetrical loads, where the power factor is almost proportional to the load. The relay measures the power factor (cos ϕ), that is the ratio between the active and the apparent power of a motor. Start/stop input allowsto use a manual switch to start and stop the motor, without the need of an auxiliary device. The advantage of using the latch function isthat the relay can be kept energized even after the end of the alarm condition. Inhibit func- tion can be used to avoid relay operation when not desired(maintenance, tran- sients). The LED's indicate the state of the alarm and the output relay. Housing Function Type Item number Output Power Supply Range Type Selection MountingOutputSupply: Supply:Supply: Supply: 208 to 240 VAC380 to 415 VAC 380 to 480 VAC600 to 690 VAC DIN-rail SPDT DWB 01 C M23 10A DWB 01 C M48 10A DWB01 C M69 10A Plug-in SPDT PWB 01 C M23 10A PWB 01 C M48 10A InputSpecifications Input Voltage (Own power supply): 3 - phase DWB01: L1, L2, L3 PWB01: 5, 6, 7 M23: 208 to 240 VAC ± 15% DWB01CM48: 380 to 480 VAC ± 15% PWB01C 8: 380 to 415 VAC ± 15% DWB01CM69: 600 to 690 VAC ± 15% 1- phase DWB01CM23: L1, L2 (connect pins L2, L3) PWB01CM23: 5, 6 (connect pins 6, 7) 208 to 240 VAC ± 15% Current:DWB01: 5A, 10A: I1, I2 MI...: U1, U2 PWB01: 5A, 10A: 11, 10 MI...: 9, 8 Measuring ranges Upper level Lower level Power factor (cos ϕ)0.1 to 0.990.1 to 0.99 AACrmsMax. curr. (30 s) Direct input:0.5 to 5A30A 1 to 10A 50A Standard CT (examples) TADK2 50 A/5 A5 to 50 A60 A CTD1 150 A/5 A15 to 150 A180 A CTD4 400 A/5 A40 to 400 A480 A TAD12 1000 A/5 A100 to 1000 A1200 A TACO200 6000 A/5 A600 to 6000 A7200 A MI CT ranges MI 100 10 to 100 A325 AAC MI 500 50 to 500 A1000 AAC Specifications are subject to change without notice (07.06.10)1
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