Related Manuals for C&S MRN3
Summary of Contents for C&S MRN3
- Page 1 High-Tech Range MRN3- Mains decoupling Relay SELECT/RESET U< U< ENTER U<< U<< U> U> U>> U>> TRIP MRN3-1 C&S Protection & Control Ltd.
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Page 2: Table Of Contents
Parameters for the fault recorder (MRN3-3 MRN3-3 MRN3-3 MRN3-3 MRN3-3) Output relays 5.4.7 Voltage threshold value for frequency and 8 Order form vector surge measuring (df/dt at MRN3-2 MRN3-2 MRN3-2 MRN3-2) MRN3-2 5.4.8 Adjustment of the slave address 2 2 2 2 2... -
Page 3: Introduction And Application
( ( ( ( ( MRN3-1 MRN3-1 MRN3-1 MRN3-1) ) ) ) ) or MRN3-1 frequency supervision Rate of change of frequency df/dt ( ( ( ( ( MRN3-2 MRN3-2 MRN3-2 MRN3-2) ) ) ) ) MRN3-2 adjustable voltage threshold value for blocking Because of combination of three protectional functions in frequency and vector surge measuring. -
Page 4: Design
If 1, 3, or 7 recordings are chosen, the relevant number The MRN3 MRN3 MRN3 is equipped with 5 output relays. Apart from of partial segments is reserved in the complete memory. the relay for self-supervision, all protective functions can... -
Page 5: Fault Recorder
This means that No. 6 is the oldest P P P P P arameter Setting arameter Setting arameter Setting arameter Setting arameter Setting MRN3-1 MRN3-1 MRN3-1 MRN3-1 MRN3-1 MRN3-2 MRN3-2... -
Page 6: Leds
50 Hz. communication. 4.2 Digital circuits The LED marked with the letters FR is alight while the fault The essential part of the MRN3 MRN3 MRN3 MRN3 relay is a powerful MRN3 recorder is being adjusted. -
Page 7: Selection Of Star Or Delta Connection
Fig. 4.2: Input v.t.s in star connection (Y) Fig. 4.2: Input v.t.s in star connection (Y) the range of 0.5 Hz/s up to over 2 Hz/s. The MRN3 detects the instantaneous frequency gradient df/dt of each 4.4 Principle of frequency supervision... -
Page 8: Vector Surge Supervision (Mrn3-1) (Mrn3-1)
Whereas the MRN3-1 MRN3-1 MRN3-1 MRN3-1 MRN3-1 detects mains failures within 60 ms without the restrictions described above because they Mains / Load Generator are specially designed for applications where very fast decoupling from the mains is required. - Page 9 In case of mains failure or auto reclosing the generator The vector surge function of the MRN3-1 supervises vector suddenly feeds a very high consumer load. The rotor surges in all three phases at the same time. Tripping of the...
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Page 10: Voltage Threshold Value For Frequency
< (adjust- able voltage thresh- old value) T T T T T able 4.1: Dynamic behaviour of MRN3 functions able 4.1: Dynamic behaviour of MRN3 functions able 4.1: Dynamic behaviour of MRN3 functions able 4.1: Dynamic behaviour of MRN3 functions able 4.1: Dynamic behaviour of MRN3 functions... -
Page 11: Operation And Settings
<+> until max. setting value LED of blocked parameter Undervoltage blocking of setting value in Volt <SELECT/RESET><+><-> f, ΔΘ, df frequency and vector surge meas- uring (df/dt for MRN3-2) Slave address of serial interface 1 - 32 <SELECT/RESET><+><-> Baud-Rate 1200-9600 <SELECT/RESET><+><-> Parity-Check even odd no <SELECT/RESET><+><->... -
Page 12: Setting Procedure
Function Display shows Pressed pushbutton Corresponding Type of relay Trigger signal for the fault recorder TEST, P_UP , A_PI, TRIP <SELECT/RESET><+><-> Number of fault occurences S=2, S=4, S=8 <SELECT/RESET><+><-> Display of date and time Y=99, M=10, D=1, <SELECT/RESET><+><-> h=12, m=2, s=12 Software version First part (e.g. -
Page 13: Display Of The Activation Storage (Flsh/ Nofl)
Setting Setting Setting v = 50 v = 50 v = 50 f = 50 f = 50 f = 50 v = 60 v = 60 v = 60 f = 60 f = 60 f = 60 Setting Setting v = 50 v = 50... -
Page 14: Number Of Measuring Repetitions (T) For
MRN3 works with an adjustable measuring repetition. surge angle has exceeded the set value ΔΘ in one of the When the instantaneous frequency measuring value three phases. -
Page 15: Parameter Setting Of Frequency Gradient
False of a general activation. tripping of the MRN3 MRN3 MRN3 MRN3 in such cases is prevented by an MRN3 TRIP Storage is initiated after a trip has adjustable voltage threshold U . -
Page 16: Adjustment Of The Clock
Assignment of the output relays : Unit MRN3 MRN3 MRN3 MRN3 has five output relays. The fifth output relay MRN3 When adjusting the date and time, LED l light up. The is provided as permanent alarm relay for self supervision adjustment method is as follows: is normally on. -
Page 17: Indication Of Measuring Values
MRN3 MRN3 The MRN3 MRN3 MRN3 offers a minimum/maximum storage each for As to operation : the measuring values of the vector surge as well as the After each reset (ref. 5.9.1) the min./max. storages are frequency gradient. These min./max. values are mainly cleared. -
Page 18: Unit Of The Measuring Values Displayed
M = 03 f) and the four function LEDs (U<, U<<, U>, U>>, f1, D = 10 f2, f3, ΔΘ and df/dt) are equipped at MRN3. Not only Time : h = 17 fault messages are transmitted, the display also indicates m = 21 the tripped protection function. -
Page 19: Relay Testing And Commissioning
Multifunctional relays”. all signal circuits and output relay circuits are connected correctly. As relay input energizing quantities, three phase voltage should be applied to MRN3 relay input circuits. Depending 6.1 Power-On on the system conditions and the voltage transformer Note! used, three voltages can be connected to the relay input circuits with either star or delta connection. -
Page 20: Example Of Test Circuit
Figure 6.1 shows an example of a three-phase test circuit energizing the MRN3 MRN3 MRN3 MRN3 relay during test. The three phase MRN3 voltages are applied to the relay in Y-connection. Blocking Voltage Supply... -
Page 21: Checking The Operating And Resetting Values
(vector surge) on the voltage signal can be occur. In order to ensure a trouble-free test procedure, obtained to test the vector surge function of MRN3 MRN3 MRN3 MRN3 relay. -
Page 22: Checking The External Blocking And Reset
Because of its powerful combined indicating and During a maintenance test, the relay functions including measuring functions, the MRN3 relay may be tested in the operating values and relay tripping times should be the manner of a primary injection test without extra tested. -
Page 23: Technical Data
Technical data Measuring input circuits Rated data Nominal voltage U 100 V, 230 V, 400 V Nominal frequency f 40 - 70 Hz Power consumption in voltage circuit <1 VA Thermal rating continuously 2 x U Undervoltage lockout for frequency and vector surge measurement U<... -
Page 24: Setting Ranges And Steps
7.3 Setting ranges and steps Function Para- Setting range Steps Tolerance meter Transformer ratiio (SEC) 1.01...6500 0.01; 0.02; 0.05 prim 0.1; 0.2; 0.5; 1.0; 2.0; 5.0; 10; 20; 50 Rated frequency f = 50 Hz / f = 60 Hz Switch group D = Delta / Y = Stern Switch over... -
Page 25: Interface Parameter
T T T T T able 7.2: Output relays able 7.2: Output relays able 7.2: Output relays able 7.2: Output relays able 7.2: Output relays 8. Order form Mains decoupling relay MRN3- With voltage-, frequency and vector surge supervision Voltage, frequency and df/dt-supervision Rated voltage: 100 V... - Page 26 Setting list MRN3 Project: CSPC Job No.: Function group: = Location: + Relay code: Relay functions: Password: Setting of the parameters System parameter Relay type Default Actual settings settings Function Unit MRN3-1 MRN3-2 Set1/Set2 Set1/Set2 Uprim/Usek Voltage transformer ratio Δ/Y...
- Page 27 Fault recorder Default Default Default Actual Actual Actual Default Default Actual Actual Function Function Unit Unit settings settings settings settings Function Function Function Unit Unit Unit settings settings settings settings settings settings Number of recordings Saving of the recording at the occurrence TRIP Time prior to trigger impulse 0.05...
- Page 28 High = not plugged All settings must be checked at site and should the occasion arise, adjusted to the object/item to be protected. This technical manual is valid for (MRN3-1) (MRN3-1) software version number : D01-8.08 (MRN3-1) (MRN3-1) (MRN3-1) D04-8.08 (MRN3-2) (MRN3-2) (MRN3-2)