Monitoring Relays 3-Phase Load Guard Types DWB01, PWB01 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) DWB01 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 Start/stop input allows to Housing precise TRMS power factor use a manual switch to start Function monitoring relays for 3- and stop the motor, without Type phase balanced systems. the need of an auxiliary Item number They can be used for moni- device. Output toring the actual load of The advantage of using the Power Supply asynchronous motors and latch function is that the Range other symmetrical loads, relay can be kept energized where the power factor is even after the end of the almost proportional to the alarm condition. Inhibit func- load. tion can be used to avoid The relay measures the relay operation when not power factor (cos ), that is desired (maintenance, tran- the ratio between the active sients). and the apparent power of a The LED s indicate the state motor. of the alarm and the output relay. Type Selection MountingOutputSupply: Supply: Supply: Supply: 208 to 240 VAC 380 to 415 VAC 380 to 480 VAC 600 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 Input Specifications Input Measuring ranges Upper level Lower level Voltage (Own power supply): Power factor (cos ) 0.1 to 0.99 0.1 to 0.99 3 - phase DWB01: L1, L2, L3 AACrms Max. curr. PWB01: 5, 6, 7 (30 s) M23: 208 to 240 VAC 15% Direct input: 0.5 to 5A 30A DWB01CM48: 380 to 480 VAC 15% 1 to 10A 50A PWB01C 8: 380 to 415 VAC 15% Standard CT (examples) DWB01CM69: 600 to 690 VAC 15% TADK2 50 A/5 A 5 to 50 A 60 A 1- phase DWB01CM23: L1, L2 (connect pins L2, L3) CTD1 150 A/5 A 15 to 150 A 180 A PWB01CM23: 5, 6 (connect pins 6, 7) CTD4 400 A/5 A 40 to 400 A 480 A 208 to 240 VAC 15% TAD12 1000 A/5 A 100 to 1000 A 1200 A TACO200 6000 A/5 A 600 to 6000 A 7200 A Current: DWB01: 5A, 10A: I1, I2 MI...: U1, U2 MI CT ranges PWB01: 5A, 10A: 11, 10 MI 100 10 to 100 A 325 AAC MI...: 9, 8 MI 500 50 to 500 A 1000 AAC Specifications are subject to change without notice (07.06.10) 1DWB01, PWB01 Input Specifications (cont.) Output Specifications Note: Output SPDT relay The input voltage cannot Rated insulation voltage 250 VAC raise over 300 VAC with Contact ratings (AgSnO) 2 respect to ground (PWB01 Resistive loads AC 1 8 A 250 VAC only) DC 12 5 A 24 VDC Contact input Small inductive loads AC 15 2.5 A 250 VAC DWB01 Terminals Z1, U1 DC 13 2.5 A 24 VDC PWB01 Terminals 2, 9 6 Mechanical life 30 x 10 operations Disabled > 10 k 5 Electrical life 10 operations Enabled < 500 (at 8 A, 250 V, cos = 1) Pulse width > 500 ms Operating frequency 7200 operations/h Hysteresis PF approx 0.1 Dielectric strength According to EN 60947-1 Dielectric voltage 2 kVAC (RMS) Rated impulse withstand volt. 4 kV (1.2/50 s) General Specifications Supply Specifications Power ON delay 1 to 30 s 0.5 s Power supply Overvoltage cat. III Rated operational voltage (IEC 60664, IEC 60038) Reaction time (input signal variation from Through terminals: -20% to +20% or from DWB01: L1, L2, L3 +20% to -20% of set value) PWB01: 5, 6, 7 Alarm ON delay < 200 ms M23 177 to 276 VAC 45 to 65 Hz Alarm OFF delay < 200 ms DWB01CM48 323 to 552 VAC45 to 65 Hz Accuracy (15 min warm-up time) PWB01CM48 323 to 477 VAC 45 to 65 Hz Temperature drift 1000 ppm/C DWB01CM69 510 to 793 VAC 45 to 65 Hz Delay ON alarm 10% on set value 50 ms Dielectric voltage None Repeatability 0.5% on full-scale Dielectric voltage Indication for supply to output 4 kV Power supply ON LED, green Rated operational power Alarm ON LED, red (flashing 2 Hz M23: 9 VA 230 VAC, 50 Hz during delay time) M48: 13 VA 400 VAC, 50 Hz Output relay ON LED, yellow M69: 21 VA 600 VAC, 50 Hz Environment Supplied by L1 and L2 Degree of protection IP 20 Pollution degree 3 (DWB01), 2 (PWB01) Operating temperature Max. voltage, 50 Hz -20 to 60C, R.H. < 95% Mode of Operation Max. voltage, 60 Hz -20 to 50C, R.H. < 95% DWB01 and PWB01 can be guideline to ensure correct Storage temperature -30 to 80C, R.H. < 95% used for monitoring the actu- working conditions for a Housing al load of asynchronous motor, the upper level could Dimensions DWB01 45 x 80 x 99.5 mm motors. be set above the cos PWB01 36 x 80 x 94 mm The relay measures the marking on the motor, and Material PA66 or Noryl absolute value for the power the lower level under this val- Weight Approx. 250 g factor of the system PF= ue. It is anyway recommend- Active Power/Apparent Pow- ed to make the adjustment in Screw terminals er that is for balanced sys- connection with a practical Tightening torque Max. 0.5 Nm tem with sinus waveforms test. The relay has an acc. to IEC 60947 the cosine of the angle adjustable power ON delay Product standard EN 60255-6 between motor current and in order to avoid overload Approvals UL, CSA motor voltage (cos ). detection during motor start. CE Marking L.V. Directive 2006/95/EC As cos varies with the load EMC Directive 2004/108/EC of the motor, underload and Example 1 EMC overload can be indirectly Latching mode, relay NE Immunity According to EN 60255-26 detected by DWB01 and In this application DWB01 or According to EN 61000-6-2 PWB01. PWB01 are connected to an Emissions According to EN 60255-26 The relation between the external current metering According to EN 61000-6-3 load and cos depends on transformer, type MI..., (con- the type of motor. As a nected between U1 & U2) as 2 Specifications are subject to change without notice (07.06.10)