XMR-T TRANSFORMER PROTECTION RELAYS
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MORE eXtended MOdular RElays MORE ADVANCED, HIGH-END IEDs FOR PROTECTING, MONITORING AND CONTROLLING ELECTRIC POWER SYSTEMS.

XMR-T TRANSFORMER PROTECTION RELAYS XMR-T is a part of XMORE platform, the complete range of IEDs for Medium Voltage application. XMR-T the comprehensive solution for two or three windings transformer protection. ACCURATE MEASUREMENTS Enhancements to protect and analyze power system operation in disturbance conditions: HARDWARE AND SOFTWARE MODULARITY Customization of the product from the basic solution to the more complex configuration: ► Up to 12 analogue inputs ► 32 sample for cycle Oscillography fault recording Plug in modules for HW expansion ► 64 sample for cycle measurement for...

Standard Protective & control elements SW Pack optional configuration Protection function Work in Progress Overflux (Side L or Side H) Pt100 thermal probes Undervoltage (Side L or Side H) Undercurrent (Side L, Side H, Side T) Negative sequence overcurrent (Side L, Side H, Side T) Negative/positive sequence current ratio (Side L, Side H, Side T) Thermal image (Side L, Side H, Side T) Phase overcurrent (Side L, Side H, Side T) Residual overcurrent/ High impedance restricted earth fault Phase overvoltage (Side L or Side H) Residual overvoltage (Side L or Side H) Biased restricted differential...

MEASURING INPUTS WITH INDUCTIVE CTS AND VTS ► Eleven phase current inputs and one residual current input, with nominal currents independently selectable at 1 A or 5 A through sw setting with the addition of an external analog input module ► One residual voltage input, with programmable nominal voltage within range 50...130 V (UER =100 V) BINARY INPUTS Up to 53 binary (depending upon configurations) inputs are available with programmable active state (active-ON/ active-OFF) and programmable timer (active to OFF/ON or ON/OFF transitions). The reset of relay can be associated with each digital...

Second harmonic restraint Several predefined functions are implemented: ► Activation of four set point profiles ► Phase CTs monitoring (74CT) ► Logic selectivity ► Cold load pickup (CLP) with block or setting change ► Trip circuit supervision (74TCS) ► Second harmonic restraint (inrush) ► Remote tripping ► Circuit Breaker commands and diagnostic To prevent unwanted tripping of the protective functions on transformer inrush current, the protective elements can be blocked when the ratio between the second harmonic current and the relative fundamental current is larger than a user programmable...

GENERAL MECHANICAL DATA Mounting: Mass (flush mounting case) INSULATION TESTS Reference standards High voltage test 50Hz Impulse voltage withstand (1.2/50 ms) Insulation resistance VOLTAGE DIP AND INTERRUPTION Reference standards 1 MHz damped oscillatory wave EN 60255-22-1 1 kV-2.5 kV Electrostatic discharge EN 60255-22-2 8 kV Fast transient burst (5/50 ns) EN 60255-22-4 4 kV Conducted radio-frequency fields EN 60255-22-6 10 V Radiated radio-frequency fields EN 60255-4-3 10 V/m High energy pulse EN 61000-4-5 2 kV Magnetic field 50 Hz EN 61000-4-8 1 kA/m Damped oscillatory wave EN 61000-4-12...

MAIN SETTINGS OUTPUT CIRCUITS RATED VALUES OUTPUT RELAYS Quantity Type of contacts (default): K1, K2 K3, K4, K5, K6, K31 make Rated current Rated voltage/max switching voltage Short duration current (0,5 s) Make Minimum switching load 7..31 changeover (SPDT, type C) (SPST-NO, type A) 8A 250 Vac/400 Vac 30 A 1000 W/VA 300 mW (5 V/ 5 mA) Breaking capacity: Breaking capacity: Direct current (L/R = 40 ms) Alternating current (l = 0,4) Make Short duration current (0,5 s) Minimum switching load 300 mW Life: Mechanical Electrical Voltage measure UE or U Relay nominal frequency (fn) 50, 60 Hz Relay...

P ROT E C T I O N FU N C T I O N S Full description about parameters, thresholds and timings ranges is available in relevant equipment documentation. NEGATIVE SEQUENCE FOR LINE-TRANSFORMER - 46 BASE CURRENT IB [1] (SIDE L, SIDE H, SIDE T) (SIDE L, SIDE H, SIDE T) Base current (IB) 0.10...2.50 In Note - For the CTs versions the basic current IB represents the rated current of the protected device (line, transformer, motor...) referred to the nominal current of the CT’s. If the secondary rated current of the line CT’s equals the rated current oft he relay, as usually happens, the IB value is...

► I>>inv Operating time (t>>inv) I>>> Element ► I>>> Reset time delay (t>>>RES) 0.00...100.0 s Definite time for CTs versions ► 50/51 Third threshold definite time (I>>>def) 0.100...40.0 In ► I>>>def Operating time (t>>>def) 0.03...10.00 s RESIDUAL OVERCURRENT - 50N/51N OR HIGH IMPEDANCE RESTRICTED EARTH FAULT - 87N (1 - 2) IE> Element ►IE> Curve type (IE>Curve) DEFINITE, 0.00...100.0 s ►IE> Reset time delay (tE>RES) Definite time ► 50N/51N First threshold definite time (I E>def) ► IE>def within CLP (IECLP>def ) ► IE>def Operating time (tE>def) Inverse time ► 50N/51N First threshold inverse...

IED >>>> Element ► CLP Activation time (tEDCLP>>>>) ► IED>>>> Reset time delay (tED>>>>RES) Definite time 67N Fourth threshold definite time (IED>>>>def - UED>>>>def) ► Residual current pickup value 0.002...10.00 IEn ► Residual voltage pickup value 0.004...0.500 UEn ► Characteristic angle 0...359° ► Half operating sector 1...180° ► IED>>>>def within CLP (IEDCLP>>>>def) 0.002...10.00 IEn ► IED>>>>def Operating time (tED>>>>def) 0.05...10.00 s IED>>>>> Element ► CLP Activation time (tEDCLP>>>>>) ► IED>>>>> Reset time delay (tED>>>>>RES) Definite time 67N Fifth threshold definite time...

M E T E RI N G & R E C O R D I N G Full description about measures is available in relevant equipment documentation. Typology Locked frequency U voltage frequency Positive sequence current (Side L) Negative sequence current (Side L) I L1L , I L2L , I L3L Phase currents (Side L - SideH - Side T) Negative sequence/positive sequence current ratio (Side L) Positive sequence current (Side H) Negative sequence current (Side H) Negative sequence/positive sequence current ratio (Side H) Positive sequence current (Side T) Negative sequence current (Side T) Negative sequence/positive sequence current...