MR-GU3M2P-TR2 monitoring relays Multifunctions monitoring relays (AC voltage monitoring in 3-phase network, with adjustable thresholds) Monitoring of phase sequence and phase failure Asymmetry monitoring (adjustable) Connection of neutral wire (optional) Timing adjustment of tripping delay Supply via TR2 supply transformer Output: 2 CO (2 change- over contacts) Industrial cover, width 22,5 mm Direct mounting on 35 mm rail mount acc. to PN-EN 60715 Recognitions, certifi cations, directives: Output circuit - contact data Number and type of contacts 2 CO Rated voltage 250 V AC Max. breaking capacity AC1 750 VA (3 A / 250 V AC) 1 250 VA (5 A / 250 V AC) Max. operating frequency at resistive load 100 VA 3 600 cycles/hour at resistive load 1 000 VA 360 cycles/hour Input circuit Supply voltage AC 12 ... 400 V terminals A1-A2 Must release voltage AC: 0,3 Un Operating range of supply voltage as per the specifi cation of TR2 supply transformer Rated power consumption AC 2,0 VA / 1,5 W Range of supply frequency AC as per the specifi cation of TR2 supply transformer Duty cycle 100% Measuring measuring variable AC sinus, 48...63 Hz circuit measuring inputs AC: 3(N)~ 400/230 V terminals (N)-L1-L2-L3 overload capacity 3(N)~ 600/346 V input resistance 3(N)~ 400/230 V: 1 M swiching threshold Us MIN: 0,7...1,2 Un MAX: 0,8...1,3 Un asymmetry adjustable: 5...25% Insulation according to PN-EN 60664-1 Rated surge voltage 4 000 V 1,2 / 50 s Overvoltage category III Insulation pollution degree 3 General data 5 Electrical life resistive AC1 > 2 x 10 1 000 VA 7 Mechanical life (cycles) > 2 x 10 Dimensions (L x W x H) 90 x 22,5 x 108 mm Weight 100 g o Ambient temperature storage -25...+70 C o operating -25...+55 C Cover protection category IP 20 PN-EN 60529 Relative humidity 15...85% Shock resistance 15 g 11 ms Vibration resistance 0,35 mm DA 10...55 Hz Meassuring circuit data Functions UNDER, UNDER+SEQ, WIN, WIN+SEQ SEQ - monitoring of phase sequence and phase failure ASYM - monitoring of asymmetry (adjustable) connection of neutral wire (optional) Range of delay timing adjustment tripping delay: 0,1...10 s Base accuracy 5% (calculated from the fi nal range values) Setting accuracy 5% (calculated from the fi nal range values) Repeatability 2% Voltage infl uence 0,5% Temperature infl uence 0,1% / C Recovery time 500 ms LED indicator red LED ASYM ON/OFF - indication of asymmetry red LEDs MIN and MAX ON/OFF - indication of failure red LEDs MIN and MAX fl ashing - indication of tripping delay red LED SEQ ON/OFF - indication of phase sequence yellow LED R ON/OFF - output relay status Detection of neutral wire loss. Supply voltage depending on the TR2 transformer which shall be ordered as a separate product - see page 4. If the distance between the mounting relays is less than 5 mm. If the distance between the mounting relays is greater than 5 mm. Indication of relay status - according to the set threshold. 1 www.relpol.com.pl Export Sales Department phone +48 68 47 90 832, 951 e-mail: export relpol.com.pl 12.01.2015MR-GU3M2P-TR2 monitoring relays Functions For all functions the LEDs MIN and MAX are ashing fl alternating, when ASYM - Asymmetry monitoring. the minimum value for the measured voltage was chosen to be greater than the maximum value. If a failure already exists, when the device is activated, the output relay R remains in off- position and the LED for the corresponding threshold is illuminated. UNDER, UNDER+SEQ - Undervoltage monitoring, undervoltage monito- ring with monitoring of phase sequence. If the asymmetry of the phase-to-phase voltages exceeds the value set at the ASYM-regulator, the set interval of the tripping delay (DELAY) begins (red LED ASYM ashes). fl After the interval has expired (red LED ASYM illuminated), the output relay R switches into off-position (yellow LED not illuminated). If the neutral wire is connected to the device, the asymmetry of the phase voltages referred to the neutral wire (Y-voltage) is monitored also. In that case both values of the asymmetry are evaluated and if one of the values exceeds the value set at the ASYM-regulator, the set interval When the measured voltage (mean value of phase-to-phase voltages) of the tripping delay (DELAY) begins (red LED ASYM flashes). After falls below the value adjusted at the MIN-regulator, the set interval of the the interval has expired (red LED ASYM illuminated), the output relay R tripping delay (Delay) begins (red LED MIN flashes). After the interval has switches into off-position (yellow LED not illuminated). expired (red LED MIN illuminated), the output relay R switches into off-po- sition (yellow LED not illuminated). The output relay R again switches into Loss of neutral wire by means of evaluation of asymmetry. on-position (yellow LED illuminated), when the measured voltage exceeds the value adjusted at the MAX-regulator. WIN, WIN+SEQ - Voltage monitoring in windowfunction between MIN and Shift of neutral point (asymmetry) MAX values, voltage monitoring in windowfunction between MIN and MAX caused by asymmetrical phase values with monitoring of phase sequence. loads and missing neutral wire A break of the neutral wire between power line and machinery is detected as soon as asymmetry between phase-to-phase voltage and neutral wire occurs. If the asymmetry exceeds the value set at the ASYM- regulator, the set interval of the tripping delay (Delay) begins (red LED ASYM flashes). After the interval has expired (red LED ASYM illuminated), the output relay The output relay R switches into on-position (yellow LED illuminated) when R switches into off-position (yellow LED not illuminated). A break of the the measured voltage (mean value of phase-to-phase voltages) exceeds neutral wire between our device and the machinery can not be detected. the value adjusted at the MIN-regulator. When the measured voltage exceeds the value adjusted at the MAX-regulator, the set interval of the tripping delay (Delay) begins (red LED MAX ashes). fl After the interval U - supply voltage R - output state of the relay MIN, MAX - relay status has expired (red LED MAX illuminated), the output relay R switches into SEQ - phase sequence off-position (yellow LED not illuminated). The output relay R again switches into on-position (yellow LED illuminated) when the measured voltage falls below the value adjusted at the MAX-regulator (red LED MAX not illumi- Front panel description nated). When the measured voltage falls below the value adjusted at the MIN-regulator, the set interval of the tripping delay (Delay) begins again (red LED MIN ashes). fl After the interval has expired (red LED MIN illuminated), the output relay R switches into off-position (yellow LED not illuminated). SEQ - Phase sequence monitoring. Asymmetry-adjusting Red LED knob MAX threshold- Red LED -adjusting knob Phase sequence monitoring is selectable for all functions.If a change in phase sequence is detected (red LED SEQ illuminated), the output relay R switches into off-position immediately (yellow LED not illuminated). MIN threshold- Red LED -adjusting knob SEQ - Phase failure monitoring. Tripping delay- Red LED -adjusting knob Function-adjusting Yellow LED knob If one of the phase voltages fails, the set interval of the tripping delay (Delay) begins (red LED SEQ ashes). fl After the interval has expired (red LED SEQ illuminated), the output relay R switches into off-position (yellow LED not illuminated). Reverse voltages of a consumer (e.g. a motor which continues to run on two phases only) do not effect the disconnection but can be monitored by using a proper value for the asymmetry. 2 www.relpol.com.pl Export Sales Department phone +48 68 47 90 832, 951 e-mail: export relpol.com.pl 12.01.2015