Type: M3PRT/2 & M3PRT/2-4W Phase Failure, Phase Sequence and Under Voltage plus Time Delay q q q q q q q q q 35mm DIN rail housing Microprocessor controlled with internal monitoring (self-checking) Monitors own supply and detects an Under voltage condition on one or more phases M3PRT/2 measures phase to phase voltage and M3PRT/2-4W measures phase to neutral voltage Detects incorrect phase sequence, phase loss and neutral loss (4-wire only) Adjustment for under voltage trip level Adjustment for time delay (from an under voltage condition) 1 x DPDT relay output 8A Intelligent LED indication for supply and relay status * FUNCTION DIAGRAM Fixed Under trip [2] Phases reversed Under trip Output t t tr tr Td time delay automatically cancelled as phase drops below 2nd trip point * INSTALLATION AND SETTING * * Supply / monitoring voltage U*: Frequency range: Isolation: Rated impulse withstand voltage: Power consumption: (max.) Hyst. Td Terminal Protection to IP20 * TECHNICAL SPECIFICATION Monitored 3~ Supply L1, L2 L2, L3 L3, L1 (4-wire only) N Dims: to DIN 43880 W. 35mm Installation work must be carried out by qualified personnel. BEFORE INSTALLATION, ISOLATE THE SUPPLY. Connect the unit as required. The diagram below shows a typical installation, whereby the supply to the load is being monitored by the relay. If a fault should occur, the contactor is de-energised removing the 3-phase supply to the load. The contactor only re-energises after the fault has cleared. Applying power. * Set the "trip level" and the "time delay" to minimum. * Apply power and the green "supply on" and red "relay" LED's will illuminate, the relay will energise and contacts 15 and 18 / 25 and 28 will close. Refer to troubleshooting table if the unit fails to operate correctly. Setting the unit. * Accurate setting can be achieved by adjusting the "trip level" until the unit trips (relay de-energises) then by decreasing the "trip level" setting until the relay re-energises. By close setting of the "trip level", the unit will also detect a phase loss even with a large percentage of re-generative voltage. * In order to set the unit as previously described but without causing disruption to the equipment being controlled/monitored, set the "time delay" to maximum. It will now be possible to establish the trip point when the red "relay" LED starts to flash. Decrease the trip level setting to stop the LED flashing. (Note: If the time delay is allowed to expire, the output relay will de-energise). * If large supply variations are anticipated, the "trip level" should be set further from the nominal voltage. * Set the "time delay" as required. (Note that the delay is only effective should the supply drop below the set "trip level". However, if during an under voltage condition the supply drops below the 2 nd under voltage trip level, any set time delay is automatically cancelled and the relay de-energises). Troubleshooting. The table below shows the status of the unit during a fault condition. Supply fault Phase or Neutral (4-wire only) missing Phases reversed (no delay) Under Voltage condition (during timing) Under Voltage condition (after timing) Phase below 70% of Un (fixed under trip level [2]) Phase below 50% of Un Green LED Off Flashing On On On Off Red LED Off Off Flashing Off Off Off Relay De-energised De-energised Energised for set delay (t) De-energised De-energised De-energised Trip levels: Voltage range: 77 - 143V AC (3-wire) 161 - 300V AC (3-wire) 280 - 520V AC (3-wire) 44.5 - 82.5V AC (4-wire) 93 - 173V AC (4-wire) 161 - 300V AC (4-wire) Repeat accuracy: Hysteresis: Response time: Time delay (t): M3PRT/2 (L1, L2, L3) 77- 143V AC 161 - 300V AC 280 - 520V AC 48 - 63Hz Over voltage cat. III M3PRT/2-4W (L1, L2, L3, N) 44.5 - 82.5V AC 93 - 173V AC 161 - 300V AC *Please state Supply / monitoring voltage when ordering 4kV (1.2 / 50S) IEC 60664 L1: 20VA (3-wire), 13VA (4-wire) L2: 0.2VA (3-wire), 0.1VA (4-wire) L3: 20VA (3-wire), 0.1VA (4-wire) Under [2] fixed 2%: 77V 161V 280V Under (adjustable): 83 - 138V 173 - 288V 300 - 500V 44.5V 48 - 79V 93V 100 - 166V 161V 173 - 288V 0.5% @ constant conditions 2% of trip level (factory set) 50 mS 0.2 - 10 sec ( 5%) Note: actual delay (t) = adjustable delay + response time Delay from phase/neutral loss (tr): Power on delay (Td): 100 mS (worst case = tr x 2) 1sec. (worst case = Td x 2) Ambient temp: Relative humidity: -20 to +60C +95% Output: Output rating: DPDT relay (15, 16, 18 / 25, 26, 28) AC1 250V 8A (2000VA) AC15 250V 3A DC1 25V 8A (200W) 150,000 ops at rated load 2kV AC (rms) IEC 60947-1 Electrical life: Dielectric voltage: Rated impluse withstand voltage: Housing: Weight: Mounting option: 4kV (1.2 / 50S) IEC 60664 Terminal conductor size: Orange flame retardant UL94 VO 100g On to 35mm symmetric DIN rail to BS5584:1978 (EN50 002, DIN 46277-3) Or direct surface mounting via 2 x M3.5 or 4BA screws using the black clips provided on the rear of the unit. 2 x 2.5mm2 solid or stranded Approvals: Conforms to IEC. CE and Compliant. Options: 1. For other supply/monitoring voltages, please consult the sales office. 2. For alternative time delays or trip levels, please consult the sales office. * CONNECTION DIAGRAM L1 (R) Local Fuse Board L2 (Y) LOAD * MOUNTING DETAILS L3 (B) 89 (excl. clips) N* Supply / Monitored Voltage 45 N* L3 L2 L1 *N - Neutral connection only available on 4-wire version Insert screwdriver to release clips 49 59 15 25 16 18 26 28 Withdraw clips fully when surface mounting Phase monitor Contactor 93 (+/- 1mm) M3PRT2-2-A Broyce Control Ltd., Pool Street, Wolverhampton, West Midlands WV2 4HN. England Telephone: +44 (0) 1902 773746 Facsimile: +44 (0) 1902 420639 Email: sales@broycecontrol.com Web: http://www.broycecontrol.com The information provided in this literature is believed to be accurate (subject to change without prior notice); however, use of such information shall be entirely at the user's own risk.