Monitoring Relays -Phase rue RMS AC/DC Over and nder Current ypes, PC0 PC0 RMS AC/DC over + under, over+over, under+under current and voltage monitoring relays DC process signal plus/minus monitoring relay () Selection of measuring range by DP-switches Adjustable current and voltage on relative scale Adjustable hysteresis on relative scale Separately adjustable delay functions (0. to 30 s) Programmable latching or inhibit at set level Output: or x 8 A SPD relay N.D. or N.E. selectable For mounting on DN-rail in accordance with DN/EN 0 0 () or plug-in module (PC0) 4 mm Euronorm housing () or 3 mm plug-in module (PC0) ED indication for relay(s), alarm and power supply ON Galvanically separated power supply Product Description and PC0 are precise RMS AC/DC over+under, over+over or under+under current and voltage (selectable by DP-switch) monitoring relays. can perform also DC plus/minus measurement by short circuiting pins and Y. he devices can be connected to the M or MP and A8 or E8 current transformers. Both relays have two individual set levels with their own time delay. Only for each set level can work with a single SPD relay. Owing to the built-in latch function, the ON-position of the relay output can be maintained. nhibit function can be used to avoid relay operation when not desired (maintenance, transitions). he ED's indicate the state of the alarm and the output relays. Ordering Key Housing Function ype tem number Output Power supply Range DC 0 D B3 AV0 ype Selection Mounting Output Supply: 4 VDC Supply: 48 VDC Supply: 4/48 VAC Supply: /30 VAC DN-rail xspd DC 0 D 4 AV0 DC 0 D 48 AV0 DC 0 D B48 AV0 DC 0 D B3 AV0 Plug-in SPD PC 0 C 4 AV0 PC 0 C 48 AV0 PC 0 C B48 AV0 PC 0 C B3 AV0 nput Specifications nput Current level Voltage level DC levels ( only) : erminals Y, Y PC0: erminals, : erminals Y, PC0: erminals, Connecting terminals, Y Current ranges nternal resis. Max. curr. 0. to ma AC/DC 0 Ω 3 ma to 0 ma AC/DC 0 Ω ma - to ma DC ( 0 Ω 3 ma -0 to 0 ma DC} only) 0 Ω ma Max. current for s 00 ma Voltage ranges nternal resis. Max. volt. 0. to V AC/DC > 0 kω V to 0 V AC/DC > 0 kω 0 V 0.4 to 4 V p AC > 0 kω 00 V - to VDC ( > 0 kω V -0 to 0 VDC } only) > 0 kω 0 V Max. voltage for s 00 V Note: he input voltage cannot raise over 300 VAC/DC with respect to ground (PC0 only) C ranges AAC rms Max. curr. input) -ph.: M and MP ranges (0.4 to 4 V p 3-ph.: M MP 300 0. to A 0 AAC M 0 MP 300 to 0 A 0 AAC M 00 MP 300 0 to 00 A 0 AAC M 00 MP 300 0 to 00 A 0 AAC A8 ranges ( to 0 ma input) A8-0/0. to A 30 AAC A8-0/0 0 to 0 A 0 AAC A8-0/0 00 0 to 00 A 0 AAC A8-0/0 0 to 0 A 300 AAC A8-0/0 00 0 to 00 A 00 AAC E8-0 ranges ( to 0 ma input) E8-0. to A 0 AAC
, PC0 nput Specifications (cont.) Note: MP 3... current transformers not suitable for under current measurements due to the output signal of the device (see data sheet) Contact input erminals Z, Y PC0 erminals 8, 9 Disabled > 0 kω Enabled < 00 Ω atch disable > 00 ms Output Specifications Output or x SPD relays Rated insulation voltage 0 VAC Contact ratings (AgSnO ) Resistive loads AC 8 A @ 0 VAC DC A @ 4 VDC Small inductive loads AC. A @ 0 VAC DC 3. A @ 4 VDC Mechanical life 30 x 0 operations Electrical life 0 operations (at 8 A, 0 V, cos ϕ = ) Operating frequency 00 operations/h Dielectric strength Dielectric voltage kvac (rms) Rated impulse withstand volt. 4 kv (./0 s) Supply Specifications Power supply Overvoltage cat. Rated operational voltage (EC 04, EC 0038) through terminals: A, A or, A (), 0 or, 0 (PC0) 4: 4 VDC ± 0%, insulated 48: 48 VDC ± 0%, insulated B48: 4/48 VAC ± % 4 to Hz, insulated B3: /30 VAC ± % 4 to Hz, insulated Dielectric voltage DC supply AC supply Supply to input kv 4 kv Supply to output 4 kv 4 kv nput to output 4 kv 4 kv Rated operational power AC VA DC 3 W General Specifications Power ON delay Reaction time Alarm ON delay Alarm OFF delay Accuracy emperature drift Delay ON alarm Repeatability ndication for Power supply ON Alarm ON Output relay ON Mode of Operation and PC0 monitor both AC and DC current and voltage. can also monitor positive and negative DC voltage connecting terminals Y and. Example (no contact input - under+over voltage - x SPD N.D. relays s ± 0. s or s ± 0. s (input signal variation from -0% to +0% or from +0% to -0% of set value) < 00 ms < 00 ms ( min warm-up time) ± 000 ppm/ C ± 0% on set value ± 0 ms ± 0.% on full-scale ED, green ED, red (flashing Hz during delay time) or x ED(s), yellow ( x SPD for PC0) - RMS) : One relay operates when the voltage drops below the under voltage set point for the voltage exceeds the set level plus the set hysteresis. he other relay operates when the voltage exceeds Environment (EN 09) Degree of protection P 0 Pollution degree 3 (), (PC0) Operating temperature -0 to 0 C, R.H. < 9% Storage temperature -30 to 80 C, R.H. < 9% Housing dimensions Din-rail version 4 x 80 x 99. mm Plug-in version 3 x 80 x 94 mm Weight Approx. 0 g Screw terminals ightening torque the over voltage set point for the voltage drops below the set level minus hysteresis. PC0: he relay operates when the voltage drops below the under voltage set level for set delay time or when it Max. 0. Nm acc. to EC 094 Approvals, CSA (except 48) CE Marking Yes EMC Electromagnetic Compatibillity mmunity According to EN 000-- Emission According to EN 000--3 exceeds the over voltage set level for more than the relative set delay time. he relay releases when the voltage exceeds the under voltage set level plus hysteresis and it drops below the over voltage set level minus hysteresis (the hysteresis is the same for both set levels).
, PC0 Mode of Operation (cont.) Example (latch active - under+under current - x SPD relays ( x SPD for PC0) - RMS) : Each relay operates and latches when the current drops below the respective set level for delay time. Provided that the current has exceeded the respective set level plus hysteresis, each relay releases when the contact input s connection is interrupted. PC0: he relay operates when the current drops below the higher set level for delay time. Provided that the current has exceeded the higher set level plus hysteresis the relay releases when the contact input s connections is interrupted. Note Different delay times can be used for appropriate reaction according to the set points. Example 3 (inhibit active - over+over current with M C - DPD relay (SPD for PC0) - RMS) Provided that the contact input s connection is interrupted, the relay operates when the current flowing in the M C exceeds the lower set level for more than the respective delay time. t releases when the current drops below the lower set level minus hysteresis or when the contact input s pins are connected. (inhibit active - over+over current with A8-0 C - Function/Range/evel and ime Delay Setting Adjust the input range setting the DP switches and of the main black selector as shown below. Select the desired function setting the DP switches 3 to of the black selector and, of the small red selector as shown below. o access the DP switches Set Point (SP) monitoring function ON: Over current or voltage OFF: nder current or voltage Relay(s) coupling ON: x SPD ( only) OFF: x DPD (, PC0) open the grey plastic cover as shown below he selection between current and voltage is automatically selected through the input connectors. RMS or positive/negative DC monitoring selectable by short-circuiting terminals Y and ( only). DPD relay ( x SPD for PC0) - RMS Provided that the contact input s connection is interrupted, the relay operates when the current flowing in the A8-0 C exceeds the lower set level for more than its delay time. t releases when the current drops below the lower set level minus hysteresis or when the contact input s pins are connected. Example ( only) (no contact input - under+over voltage - x SPD N.D. relays - plus/minus DC One relay operates when the voltage drops below the under voltage set point for the voltage exceeds the set Selection of level, time delay and hysteresis: pper knob: Setting of hysteresis on relative scale: 0 to 30% on set value. Relay(s) working mode ON: Normally De-energized (ND) OFF: Normally Energized (NE) Power ON delay ON: s ± 0. s OFF: s ± 0. s Contact input ON: atch function OFF: nhibit function Set Point (SP) monitoring function ON: Over current or voltage OFF: nder current or voltage level plus the set hysteresis. he other relay operates when the voltage exceeds the over voltage set point for the voltage drops below the set level minus hysteresis. n this case the spare front label has to be placed on the device for proper level adjustment. Note When the inhibit contact is opened, if the input signal is already in alarm position, the delay time needs to elapse before relay(s) activation. Centre knobs: Current level setting on relative scale: 0 to 0% on full scale. ower knobs: Setting of delay on alarm time on absolute scale (0. to 30 s). Measuring range (depending on connections) SW ON ON OFF Connect nput term. SW OFF ON ON None : Y,Y 0. to ma to 0 ma None PC0:, AC/DC AC/DC Y to : Y,Y - to + -0 to +0 None ma DC ma DC None : Y, 0. to V 4 V p to 0 V PC0:, AC/DC AC/DC Y to : Y, - to + None -0 to +0 V DC V DC 3
, PC0 Wiring Diagrams Example 4/48 4 VDC VDC(+) (+) 48/30 VAC 4/ VAC Example 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC Y Z A 8 8 Y A 0 Example atch/inhibit 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC Example atch/inhibit 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC Y Z A 8 8 Y A 0 Example 3 M... atch/inhibit Y Y 4/48 VDC VDC (+) (+) Example 3 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC 48/30 VAC 4/ VAC Z A A 8 8 M... atch/inhibit 0 A8-0 Y Yellow Red atch/inhibit Y 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC Z A A 8 8 A8-0 Yellow Red atch/inhibit 4/48 VDC VDC (+) (+) 48/30 VAC 4/ VAC 0 Black Black Example 4/48 VDC (+) (+) 48/30 VAC VAC 4/ VAC Y Z A 8 8 Y A PC0 4
, PC0 Operation Diagrams Over+over voltage/current - N.D. relay(s) Over+over voltage/current Over+over voltage/current - atch - N.D. relay(s) Over+over voltage/current - atch atch ON Set evel Set evel Set evel Set evel ors RE() ors ors RE( RE() ors ors DPD()/RE(PC0 RE( ors Red ED DPD()/RE(PC0 Red ED Over+under voltage/current - N.E. relay(s) Over+under voltage/current - N.E. relay(s) Over+under voltage/current - nhibit - N.E. relay(s) Over+under voltage/current - nhibit - N.E. relay(s) Set evel nhibit ON Set evel Set evel ors RE() ors RE( ors DPD()/RE(PC0 Red ED Set evel ors RE() ors RE( ors DPD()/RE(PC0 Red ED nder+under voltage/current - N.D. relay(s) nder+under voltage/current Set evel Set evel ors RE() ors RE( ors DPD()/RE(PC0 Red ED Dimensions DN-rail Plug-in 4 99. 3 94 90 80 83. 3 80 3 8. 8.