YZ Monitoring Relays 3-Phase Load Guard Types DWB01 PWB01
Contents
1. selection between these is allows by the DIP The following table shows how the input con tact manages the mode of operation Contact input working mode CLOSED OPEN LATCH NOT ACTIVE ACTIVE INHIBIT ACTIVE NOT ACTIVE START STOP START STOP DWB01 PWB01 Wiring Diagrams DWB01 Direct connection Latch Inhibit Contact PWB01 Direct connection Latch Inhibit Contact DWB01 MI CT O 1 e Latch Inhibit AS Contact Latch Inhibit Contact Latch Inhibit Contact DWB01 PWB01 Wiring Diagrams cont With the start stop function enabled it s necessary to use the following wiring diagrams which are two examples among many others It is possible for both 3 phase loads and 1 phase loads either through direct connection or external current metering transformer DWB01 Direct connection Manual start and stop NE relay i iy Start stop Contact PWB01 Direct connection Manual start and stop NE relay Start stop Contact cos 45 7 cos ON b 9 7 S m vo Operation Diagrams Latch function NE relay Power supply Latch contact Closed latch not active Upper Level Hysteresys Hysteresys Lower Level F Power 4 HTA Power Td HTA Relay ON Inhibit function ND relay Power supply2. Inhibit contact Closed inhibit active Upper Level Hysteresys Hysteresys Lower Level Relay ON EPONA TA F Power q HTA Start and stop function NE relay Power supply Closed Start Open Stop Upper Level Hysteresys 7 Hysteresys Lower Level Relay ON E PONET ETA em DWB01 PWB01 Dimensions DIN rail Plug in 45 99 5 s i jana k y 90 gt l lesa ese 28 1 i 8 21 28 3 E ki ee E C k 2 B See jeeo E 28 5 gt
3. Monitoring Relays 3 Phase Load Guard Types DWBO1 PWBO1 Product Description DWBO1 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 9 that is the ratio between the active and the apparent power of a motor Type Selection Mounting Output DIN rail SPDT Plug in SPDT Start stop input allows to use a manual switch to start and stop the motor without the need of an auxiliary device The advantage of using the latch function is that 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 Supply 208 to 240 VAC DWB 01 C M23 10A PWB 01 C M23 10A Input Specifications Supply 380 to 415 VAC YZ Ee Be eh ra OT IL dr PR MEGA TIEEHONG GLECTRIC EQUIPMENT 25 LT0 e TRMS load guard relays for three phase balanced applications e Measuring if the power factor is within set limits e Measure voltage on own power supply e Measuring ranges 5A 10A MI current transformers e Power ON delay 1 to 30 s knob adjustable e Separately adjustable upper lower level on ab
4. ct ratings AgSnO2 u Resistive loads AC1 840 250 VAC DC 12 5A 24VDC Small inductive loads AC 15 2 5 A 250 VAC DC 13 2 5 A 24 VDC Mechanical life gt 30 x 10 operations Electrical life gt 10 operations at 8 A 250 V cos 1 Operating frequency lt 7200 operations h Dielectric strength Dielectric voltage According to EN 60947 1 gt 2 kVAC RMS Rated impulse withstand volt 4 kV 1 2 50 us Supply Specifications Power supply Rated operational voltage Through terminals DWB01 PWB01 M23 DWB01CM48 PWB01CM48 DWB01CM69 Dielectric voltage Dielectric voltage supply to output Overvoltage cat III IEC 60664 IEC 60038 L1 L2 L3 5 6 7 177 to 276 VAC 45 to 65 Hz 323 to 552 VAC45 to 65 Hz 323 to 477 VAC 45 to 65 Hz 510 to 793 VAC 45 to 65 Hz None 4 kV Rated operational power M23 M48 M69 Supplied by 9 VA 230 VAC 50 Hz 13 VA 400 VAC 50 Hz 21 VA 600 VAC 50 Hz L1 and L2 Mode of Operation DWB01 and PWB01 can be used for monitoring the actu al load of asynchronous motors The relay measures the absolute value for the power factor of the system PF Active Power Apparent Pow er that is for balanced sys tem with sinus waveforms the cosine of the angle between motor current and motor voltage cos 0 As cos 9 varies with the load of the motor underload and overload can be indirectly detected by DWB01 and PWB01 The relation between t
5. e alarm is conventionally ON Note 3 3 phase voltage connect the 3 phase power supply to the terminals L1 L2 and L3 DWBO1 5 6 and 7 PWB01 taking care of the sequence Select the desired function setting the DIP switches 1 to 4 as shown on the right To access the DIP switches open the plastic cover using a screwdriver as shown on the right If DIP switch 3 is set to ON start stop the position of DIP switch 4 does not affect the products working mode Centre knobs Setting of upper and lower level of cos p 0 1 to 0 99 Lower left knob Setting of delay on absolute scale 0 1 to 30 s Lower right knob Setting of power ON delay on absolute scale 1 to 30 s En DWB01 Contact input ON 10A Input current range terminals 11 12 or 10 11 OFF 5A MI input Relay status ON Relay de energized in normal condition OFF Relay energized in normal condition OFF Contact input for latch inhibit functions Contact input SW4 does not affect the working mode if SW3 is ON Working mode bee ON Contact input for start stop functions a x ne a ON Latch function enable OFF Inhibit function enable N ka Notes 1 DIP switch 3 set ON enables the start stop function that is managed by the closing switch 4 opening of the contact input 2 DIP switch 3 set OFF enables the input contact for the latch inhibit functions the
6. elay releases after the set time period When the measured cos p drops below the set lower level the red LED starts flashing and the out put relay releases after the set time period When the output relay releases there will be no LED indication Example 3 1 Phase load monitoring DWB01CM2310A and PWBO1CM2310A can be used for monitoring the pow er factor of a 1 Phase load with 208 to 240 V AC mains voltage In this case the pow Function Range Level Time Setting er supply has to be connect ed between L1 L2 or 5 6 L2 and L3 or 6 and 7 have to be connected Example 4 Start stop mode relay NE In this application DWBO1 or PWBO1 are directly connect ed to a 3 phase asyn chronous motor The relay energizes as soon as the power supply is applied and the start stop contact is closed After the power ON delay the unit starts measur ing cos If cos is within the setpoints the relay ener gizes As soon as the power factor drops below the lower setpoint or exceeds the upper setpoint the output relay releases and the red LED turns ON after the set time has expired When the start stop contact is opened the relay de energizes imme diately To restart the system just connect the start stop contact Note 1 to use the start stop function the output relay has to command a contactor connected in series to the load see last two wiring dia grams Note 2 in case of current below the minimum level th
7. he load and cos 49 depends on the type of motor As a guideline to ensure correct working conditions for a motor the upper level could be set above the cos marking on the motor and the lower level under this val ue It is anyway recommend ed to make the adjustment in connection with a practical test The relay has an adjustable power ON delay in order to avoid overload detection during motor start Example 1 Latching mode relay NE In this application DWBO1 or PWB01 are connected to an external current metering transformer type MI con nected between U1 amp U2 as DWB01 PWB01 Mode of Operation cont well as to a 3 phase asyn chronous motor The relay energizes as soon as the power supply is applied After the power ON delay the unit starts measuring cos 4 If cos 4 is within the set points the relay is energized As soon as the power factor drops below the lower set point or exceeds the upper setpoint the output relay releases and the red LED turns on after the set time has expired To restart the cos p measurement connect Z1 and U1 2 and 9 or inter rupt the power supply for at least 1 s Example 2 Non latching mode relay NE DWB01 and PWB01 react as described in the previous example 1 except for the automatic reactivation of the relay as soon as cos 6 is back within the two set points When the measured cos p exceeds the set upper level the red LED starts flashing The output r
8. ications cont Note The input voltage cannot raise over 300 VAC with respect to ground PWB01 only Contact input DWB01 Terminals Z1 U1 PWB01 Terminals 2 9 Disabled gt 10 kQ Enabled lt 500 Q Pulse width gt 500 ms Hysteresis PF approx 0 1 General Specifications Power ON delay 1to30s 0 5s Reaction time Alarm ON delay input signal variation from 20 to 20 or from 20 to 20 of set value lt 200 ms Alarm OFF delay lt 200 ms Accuracy 15 min warm up time Temperature drift 1000 ppm C Delay ON alarm Repeatability 10 on set value 50 ms 0 5 on full scale Indication for Power supply ON Alarm ON LED green LED red flashing 2 Hz during delay time Output relay ON LED yellow Environment Degree of protection IP 20 Pollution degree Operating temperature Max voltage 50 Hz Max voltage 60 Hz Storage temperature Housing dimensions DIN rail version Plug in version 3 DWB01 2 PWB01 20 to 60 C R H lt 95 20 to 50 C R H lt 95 30 to 80 C R H lt 95 45 x 80 x 99 5 mm 36 x 80 x 94 mm Weight Approx 250 g Screw terminals Tightening torque Max 0 5 Nm acc to IEC 60947 Approvals UL CSA CE Marking Yes EMC Electromagnetic Compatibility Immunity According to EN 61000 6 2 Emissions According to EN 61000 6 3 Output Specifications Output SPDT relay Rated insulation voltage 250 VAC Conta
9. solute scale e Programmable latching or inhibit at set level e Automatic and manual start and stop of the system e Output 8 A SPDT relay N D or N E selectable e For mounting on DIN rail in accordance with DIN EN 50 022 DWB01 or plug in module PWB01 e 45 mm Euronorm housing DWB01 or 36 mm plug in module PWB01 e LED indication for relay alarm and power supply ON Ordering key DWB OT C M48 10A Housing Function Type Item number Output Power Supply Range Supply 600 to 690 VAC Supply 380 to 480 VAC DWB 01 C M48 10A DWBO01 C M69 10A PWB 01 C M48 10A Input Voltage Own power supply 3 phase DWB01 PWB01 M23 DWB01CM48 PWB01CM48 DWB01CM69 1 phase DWB01CM23 PWB01CM23 Current DWB01 PWB01 L1 L2 L3 5 6 7 208 to 240 VAC 15 380 to 480 VAC 15 380 to 415 VAC 15 600 to 690 VAC 15 L1 L2 connect pins L2 L3 5 6 connect pins 6 7 208 to 240 VAC 15 BA 10A 11 12 MI U1 U2 BA 10A 11 10 MI 9 8 Measuring ranges Upper level Lower level Power factor cos 9 0 1t00 99 0 1to 0 99 AACrms Max curr 30 s Direct input 0 5 to 5A 30A 1 to 10A 50A Standard CT examples TADK2 50 A 5 A 5 to 50 A 60 A TAD2 150 A 5 A 15 to 150 A 180 A TAD6 400 A 5 A 40 to 400 A 480 A TAD12 1000 A 5 A 100 to 1000 A 1200 A TACO200 6000 A 5 A 600 to 6000 A 7200 A MI CT ranges MI 100 10 to 100 A 325 AAC MI 500 50 to 500 A 1000 AAC DWB01 PWB01 Input Specif
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YZ Monitoring Relays 3 Phase Load Guard Types DWB01 PWB01