Mx3ipg2a-rotor Ground Fault 3i3s15

Modulex3 Line

MX3IPG2A

Numerical integrated generator protection (Rotor and auxiliary protection):

Protection functions • Rotor earth fault detection based on injection of a.c. low voltage (accessory X2/IPG2A) between the rotor winding of the protected synchronous machine and ground. • Two independent time thresholds measuring the resistance of the earth fault (R<; R<<). • One independent time overcurrent (I>) measuring the circulating current. • Monitoring of the injected voltage. • Dedicated input for wide range d.c. voltage measurement (d.c. auxiliary voltage monitoring, d.c. current measurement on Shunt). • Two independent time d.c. undervoltage (U -<, U - <<). • Two independent time d.c. overvoltage (U - >, U - >>). • Starting outputs (alarm), instantaneous or delayed. • Two setting groups, switch in operation: from HMI, Digital input or Communication. Measurement functions • Injected voltage. • Circulating current. • Max. circulating current. • Earth fault resistance. • D.C. voltage.

64R - 27 d.c. - 59 d.c.

Recording functions • Record of the last fault (last eight) with date and time (YY/MM/DD hh:mm:ss.mmm) and fault values. • Record of the logical status change (last 32) included thresholds, digital inputs, timers, with date and time (YY/MM/DD hh:mm:ss.mmm) • Disturbance recording with record of all input signals and correlated logical status; possibility to choose the cause determining trigger and define the recording time before and after trigger (for a total recording time of 2.5 s). • Record on counters and LED's. Monitoring and control: digital inputs and outputs • 3 freely assignable inputs (controls, blocks, setting group switch). • 6 output relays one of which is for diagnostic and 5 freely assignable to the functions.

Communication • Rear serial port for connection to Lonworks™ network at 1.25 Mbit/s. • Alternatively: serial port RS485 and Modbus protocol Human Machine Interface • Local HMI with keyboard, backlit LCD display, 12 LED's, 8 of which are freely assignable to the functions. • Local HMI by PC connected to the front serial port. • Remote interface by the Local Area Network.

Characteristics Generator rated excitation voltage ≤1000 V d.c. Excitation circuit to ground capacitance ≤5 µF Injected voltage (X2/IPG2A) 40 V

Output relay s Rated current 5A Breaking 0.3 A @ 110 Vd.c., L/R=40 ms Make and carr y 30 A for 0.5 s Mechanical life 106 operations

Rated frequency fn

Standards EN 60255-6 IEC 255

50/60 Hz

R< 200 to 4000 ohm Independent time 0.05 to 600 s R<< 200 to 4000 ohm Independent time 0.05 to 600 s I> 10 to 100 mA Independent time 0.05 to 600 s D.C. voltage measurement ranges selectable by internal bridges. Measur. Continuous Rated range withstand voltage 0 to 0.5 V 6 V 0.03 to 0.3 V 0 to 5 V 40 V 0.3 to 3 V 0 to 50 V 150 V 3 to 30 V 0 to 500 V 500 V 30 to 300 V Input resistance 0 to 0.5 V 0 to 5 V 0 to 50 V 0 to 500 V

1 Kohm 10 Kohm 100 Kohm 1000 Kohm

U- < Independent time U - << Independent time

0.5 to 1.2 Un 0.02 to 600 s 0.5 to 1.2 Un 0.02 to 600 s

U-> Independent time U ->> Independent time

0.5 to 1.2 Un 0.02 to 600 s 0.5 to 1.2 Un 0.02 to 600 s

Auxiliary supply of MX3IPG2A Uaux: 19 to 100 Vd.c. or: 19 to 72 Va.c. Uaux: 64 to 300 Vd.c. or: 64 to 275 Va.c. Burden: 5 W/10 W d.c. 10VA/20VA a.c. Auxiliary supply of X2/IPG2A Uaux: 24 to 240 Va.c. Frequency: 45 to 65 Hz Burden: <5 VA.

ALSTOM FIR S.p.A. - via Viscardi,5 - 24016 SAN PELLEGRINO T. - BG - ITALIA Tel. ++39 0345 28111 - Fax ++39 0345 22590 - Telex 301152 FIR I - E-mail: [email protected]