Mitsubishi Electric NF250-HEV Instruction Manual Download

Page: 10 / 64

(1) Screw the MDU mounting plate into the MDU Breaker main unit. (Figures 9, 10)

Use the included “M4

8” screws.

(Figure 9)

(Figure 10)

FG terminal screw

(tightening torque:

1.4 to 1.8 N·m)

FG terminal screw

(tightening torque:

1.4 to 1.8 N·m)

Fixing screws for

MDU mounting

plate M4

(tightening torque:

1.4 to 1.8 N·m)

Fixing screws for

MDU mounting

plate M4

(tightening torque:

1.4 to 1.8 N·m)

MDU Breaker main unit

(400 A frame)

MDU mounting

plate

MDU mounting plate

Fitting

(one each)

MDU Breaker

main unit

(800 A frame)

3.2 MDU mounting (external mounting for 400/800 A frame)

3.2.1 Mounting of MDU mounting plate

Caution

Make sure that the connection cable is not caught and damaged between the MDU mounting plate and MDU.

Summary of Contents for NF250-HEV

Page 1: ...ssibility of significant or minor injuries or material damages assumed INSTRUCTION MANUAL MDU BREAKER MDU TYPE MDU BN MDU BP MDU BC MDU BM MODEL NF250 SEV with MDU NF250 HEV with MDU NF400 SEW with MDU NF400 HEW with MDU NF800 SEW with MDU NF800 HEW with MDU Using this under certain conditions may cause electrical shock Read this Instruction Manual carefully prior to use so that the product is use...

Page 2: ...ion electric energy pulse output 11 3 3 2 With CC Link communication MODBUS communication 13 3 4 Wiring of MDU terminal block 14 3 4 1 External mounting type 14 3 4 2 Panel mounting type 14 4 MDU Features and Functions 16 4 1 Features of MDU 16 4 2 Functions of MDU 16 4 3 Measurement functions 17 4 3 1 Measurement function list 17 4 3 2 Measurement rated values measurement range and accuracy 18 4 ...

Page 3: ...e 38 7 1 1 2 Protection characteristic setting and setting method for 400 800 A frame 39 7 1 2 Method for various settings 40 7 1 2 1 Setting method for measurement related items 40 7 1 2 2 Setting method for alarms 42 7 1 2 3 Setting method for LCD 44 7 1 2 4 Setting method for date and time 46 7 1 2 5 Setting method for electric energy 47 7 1 2 6 Setting method for measurement items 48 7 1 2 7 S...

Page 4: ...tall in abnormal environments subject to high temperature high humidity dust corrosive gas vibration impact etc Doing so may cause electrical shock fire or may cause the product to stop working Do not wipe the MDU Breaker main unit or MDU with thinner detergent or chemical cloth Doing so may fade printing reduce insulation performance or cause mold to form Clean with air or by brushing The case of...

Page 5: ...terminals 485 485 Ter SLD FG must always be tested together Measurement point test Between MDU terminals L1 L2 and MDU terminals DA DB DG SLD FG with CC Link communication 3 4 Insulation resistance measurement ON OFF Withstand voltage test ON OFF Test conditions 〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇 Between MDU terminals L1 L2 and MDU terminals 485 485 Ter SLD FG with M...

Page 6: ...se current and two voltage between the middle pole 2 phase and the right pole 3 phase as measurement data Ignore the left pole 1 phase current as well as the voltage between the left pole 1 phase and the middle pole 2 phase and between the right pole 3 phase and the left pole 1 phase If using MDU Breaker with a single phase three wire circuit connect it as shown in Figure 2 below with the neutral ...

Page 7: ... that could not be foreseen using the scientific technology standards at the time the product was shipped by Mitsubishi Electric The free warranty described here applies only to the delivered product and does not apply to any damage or the like caused by failures in the delivered product This free warranty does not apply to any damage or the like caused due to reprinting or reproducing the informa...

Page 8: ...e of the breaker 2 While pressing the MDU mounting plate to the pressing area of the MDU Breaker main unit screw the MDU mounting plate into the MDU Breaker main unit Use the included 3 10 screws 3 Ground class D the FG terminal 3 1 2 Mounting of MDU mounting plate Figure 2 and 3 Cable outlet port Figure 1 FG terminal screw M4 6 tightening torque 1 4 to 1 8 N m Fixing screws for MDU mounting plate...

Page 9: ...f the connector to the top MDU connector Connector Connection cable 2 Insert until you hear it click into place Fixing screw for MDU M3 25 tightening torque 0 6 to 0 8 N m Figure 6 Figure 5 Termimal cover Mounting removing the terminal cover While pushing the arrow area use the area A as a fulcrum and pull it upward When removing the MDU from the MDU Breaker main unit do it in a reverse procedure ...

Page 10: ... MDU mounting plate M4 8 tightening torque 1 4 to 1 8 N m Fixing screws for MDU mounting plate M4 8 tightening torque 1 4 to 1 8 N m MDU Breaker main unit 400 A frame MDU mounting plate MDU mounting plate Fitting one each MDU Breaker main unit 800 A frame 3 2 MDU mounting external mounting for 400 800 A frame 3 2 1 Mounting of MDU mounting plate Caution Make sure that the connection cable is not c...

Page 11: ... the MDU on the fitting 1 on the MDU mounting plate Figure 12 Caution Take note of the connector s orientation and insert it straight Insert until you feel the lock click into place 2 Insert until you hear it click into place Mounting removing the terminal cover Area A Arrow area While pushing the arrow area use area A as a fulcrum and pull it upward Figure 14 Terminal cover Terminal cover 4 Remov...

Page 12: ...ert the included nuts M3 into the screw points from the back of the panel and then tighten them into place Figure 20 MDU panel cutting dimensions Use a panel with a board thickness from 1 mm to 3 2 mm 1 Precautions for mounting 2 MDU panel mounting Model 198 208 263 383 221 158 250 A frame 800 A frame NF250 SEV with MDU NF800 SEW with MDU NF800 HEW with MDU NF250 HEV with MDU 244 374 205 400 A fra...

Page 13: ... place Figure 21 Connecting the connector Figure 21 Binding the cable 1 Insert the connector into the MDU connector with the lock area of the connector to the top 2 Insert until you hear it click into place FG terminal screw 3 Connecting cable connection MDU connector Click Insert straight MDU connector Connector Connection cable Binding band attachment location Caution Secure with the binding ban...

Page 14: ...e MDU into the holes cut into the panel from the front of the panel 1 Screw the FG wire green pulled from the MDU to the FG terminal on the fixing bracket Use the included M4 6 screw 2 Insert the MDU so that it is pushing against the panel Push it against the panel so that the two fixing bracket holes are inserted into the screw points from the back of the panel Refer to 3 3 1 Figure 19 on page 11...

Page 15: ...sing a pin terminal crimp terminal with a metallic portion longer than 7 mm cut the metallic portion to 7 mm as shown in the figure below Do not forcefully pull the connection cable Doing so may result in a disconnection of the cable 3 4 Wiring of MDU terminal block 3 4 1 External mounting type 3 4 2 Panel mounting type See below for compatible electric current sizes for the MDU terminal block One...

Page 16: ...is extremely dangerous The CC Link transmission line forms a small signal circuit Install it at least 10 cm away from strong circuits However install it at least 30 cm away if parallel for a long distance If installing a MDU main unit with CC Link communication a hole cannot be made in the face board Making a hole in the face board will leave a gap in the CC Link communication cable wiring Wiring ...

Page 17: ... the latest fault cause or the latest fault current is shown They are not displayed simultaneously 3 Electric energy pulse output CC Link communication and MODBUS communication can not be installed at the same time 4 The CC Link version is CC Link Ver 1 10 5 During MDU panel mounting a CC Link MODBUS cable part no FANC 110SBH manufactured by Kuramo Electric Co LTD is used from the front surface of...

Page 18: ...r all phase Maximum value occurrence time Maximum value Present value Maximum value occurrence time Maximum value Maximum value Present value Total harmonic average value Between each line Communication Display Display rauge The following table lists measurement elements and elements that can be communicated displayed Measurement elements that can be communicated and displayed I Load current 1 0 V...

Page 19: ... value are calculated as follows when setting the phase and wire factory setting is three phase three wire for three pole products and three phase four wire for four pole products The present value of the maximum phase electric current and present value of the maximum phase electric current demand indicate the maximum value of the following phases via setting the phase and wire 4 The electric curr...

Page 20: ...W 2 103 kW 2 103 kvar 2 103 kvar 657 3 kW 657 3 kW 657 3 kvar 657 3 kvar 3 Electric power Reactive power 1 The present value is the effective value during a single cycle The electric power during reverse power flow is also measured 2 The demand time limit is a bulk setting value that includes other measurement elements Factory setting is two min 3 The measurement rated electric power reactive powe...

Page 21: ...ergy and reactive energy are shown below 2 5 of actual value 0 0 45 0 to 65 0 Hz Accuracy Range 6 Frequency 1 The measurement accuracy and measurement range for the frequency are shown below Display 0 0 Hz Communication V12 and V32 are 0 V less than 22 V Less than 45 Hz 65 Hz exceeded Blinks at 45 0 Hz Blinks at 65 0 Hz Fixed at 45 0 Hz Fixed at 65 0 Hz 2 Display communication values will be as fo...

Page 22: ...c current values for all phases from when usage began after previous reset to now 5 The demand time limit is a bulk setting value that includes other measurement elements Factory setting is 2 min 6 Each phase total distortion ratio and each phase order 3rd 5th 7th 9th 11th 13th 15th 17th 19th content ratio are values calculated as follows IAH IH3 2 IH5 2 IH7 2 IH17 2 IH19 2 8 Fault current 1 The f...

Page 23: ... when the PAL module option is installed 4 For 250 A frame the Fault cause on Instantaneous is enabled when the MDU transmission alarm switch option is installed Load current pre alarm PAL 3 Overcurrent alarm OVER Electric current demand alarm IDM_AL Electric current unbalance alarm IUB_AL Electric current open phase alarm ILA_AL Long time delay Short time delay Instantaneous 4 Open close frequenc...

Page 24: ...ally resets when the cause of the alarm is removed Alarm details Setting method Reset method 1 PAL load current pre alarm 2 OVER overcurrent alarm The alarm is output to display over communication when the electric current demand value exceeds the pick up current Set via communication or on the display Function ON OFF Pick up current 50 to 100 per 1 Demand time limit 1 to 10 min per 1 min 15 20 25...

Page 25: ...the measurement rated current The alarm is output to display over communication when an energization phase equal to or less than the maximum phase current 30 is generated when monitoring starts and after 30 seconds have passed Set via communication or on the display Function ON OFF Factory setting is OFF Pick up current 30 fixed no settings Operating time 30 s fixed no settings Set to either self ...

Page 26: ... value Measurement value lower limit setting value Automatic reset No settings Automatically resets when the cause of the alarm is removed Alarm generation status Shows whether an alarm has been generated Setting method Alarm generation condition Reset method 4 5 4 Electric current demand upper lower limit alarms The following internal accessory devices are required to measure the trip frequency a...

Page 27: ...00 m 625 kbps 400 m 2 5 Mbps 160 m 5 Mbps 100 m 10 Mbps Max 42 Cables applicable to CC Link Ver 1 10 shielded 3 core twisted pair cables Note Refer to the CC Link Partner Association website http www cc link org for details 4 6 3 MODBUS communication Item Specification Communication method Communication protocol Synchronization method Connection method Communication speed Bit length Stop bit Parit...

Page 28: ... select phases to display on the measurement display screen 3 VALUE selection switch Used to select measurement values to display on the measurement display screen 4 MENU back switch Used to switch between the measurement display screen and main menu screen and to return to the previous screen 5 ENTER switch Used to confirm items details set in the function selection mode 6 UP and DOWN switches Us...

Page 29: ...FG SLD 485 and 485 If the 485 and Ter terminal are short circuited the end MDU of the MODBUS communication can be terminated using the 120 Ω terminal resistor Screw size on terminal block is M3 5 Tightening torque is 0 94 to 1 51 N m Use crimped terminal size 7 5 mm or less for M3 5 screw Screw size on terminal block is M3 Tightening torque is 0 49 to 0 76 N m Use crimped terminal size 6 3 mm or l...

Page 30: ...LED Details ON Communication normal OFF Communication stopped ON Communication data error Blinking Communication data error OFF Communication normal Turns ON when sending data Turns ON when receiving data Station number setting switches Communication speed setting switch CC Link communication LEDs Reset switch 1 Station number STATION No setting switches Open the cover for the setting area on the ...

Page 31: ... 42 this applies to the MDU C Number of local stations 26 If only MDUs are connected up to 42 devices can be connected Number of connectable units in condition 1 1 42 2 0 3 0 4 0 42 64 Number of connectable units in condition 2 16 0 54 42 88 0 2268 2304 For the MDU panel mounting specification the terminal block on the panel mounting bracket and the terminal block on the MDU are connected with a s...

Page 32: ...he shielded wires from the special CC Link cable to SLD on each unit Use FG on each unit as the dedicated ground Use class D grounding If a dedicated ground cannot be used use a common ground as shown in the figure below If the MDU is at the end of the CC Link transmission line connect a terminator between DA and DB in the MDU terminal block MDU external mounting specification Prepare the terminat...

Page 33: ...ample Values of the switch when turned ON are 16 and 1 16 1 17 Address is 17 4 MODBUS communication speed baud rate setting switch This switch is used to set the MODBUS communication speed Factory setting 19200 bps 5 Reset switch The reset switch restarts the MDU status If the stop bit setting switch the parity bit setting switches the address setting switches or the communication speed baud rate ...

Page 34: ...able to the SLD terminal of each unit at both ends Connect the shielded wire to FG at one point on the master unit side 1 Connection of termination resistor A termination resistor must be connected to the unit at both ends of the MODBUS communication line Since the MDU has built in terminating resistors it is possible to connect a terminating resistor by short circuiting 485 and Ter terminal ...

Page 35: ...o time limit t Time Io 0 95 I I 2 Demand value The demand value is generally the average value over the demand time limit The demand time limit to is the time until the measurement display value lo when a fixed input I is continuously powered displays 95 of the input I It will take an amount of time roughly equal to three times the time limit to to display 100 of the input I 3 Power factor measure...

Page 36: ...er outage restoration The electric energy integrated value and reactive energy integrated value are stored in non volatile memory when measurement values are updated or there is a power outage When power is restored it will continue measuring from the data that was stored prior to the power outage Setting values are stored in non volatile memory when set so they do not need to be set again when po...

Page 37: ...ase it will cycle from 1 2 3 N 1 and repeat The UP and DOWN switches 6 can be used to set a numerical value for the selected item or when there are further items to select Some models do not measure or display transmit some items or functions These functions and items will be skipped 6 UP switch 4 MENU back switch 5 ENTER switch 1 ITEM selection switch 2 PHASE selection switch 3 VALUE selection sw...

Page 38: ...L_RST ERASE INFO PROTECT SETTING AL_RST ERASE INFO DOWN UP DOWN UP ENTER MENU ENTER MENU ENTER MENU ENTER MENU PROTECT SETTING AL_RST ERASE INFO DOWN UP PROTECT SETTING AL_RST ERASE INFO DOWN UP PROTECT SETTING AL_RST ERASE INFO MENU MENU MENU MENU Protection characteristics selection screen This is used to check overload short circuit protection characteristics current setting long time delay ope...

Page 39: ...hanges to 2 0 2 5 3 0 3 5 4 0 5 0 6 0 7 0 8 0 9 0 10 2 0 Enter to set the setting value The short time delay operating time Ts switches between 0 1 0 2 0 3 0 1 Enter to set the setting value The long time delay lamp characteristics I6 t switches between ON OFF ON Please enter with Enter You can check the setting value of instantaneous tripping current Ii On the change permission screen select YES ...

Page 40: ...ing value display screen Is and Ts setting values Ii setting value I6 t ON OFF Ir and TL setting values I2 t ON OFF 7 1 1 2 Protection characteristic setting and setting method for 400 800 A frame The setting current from the measurement display unit can not be changed for current setting Ir and instantaneous tripping current Ii Please change with the setting knob on the breaker Earth leakage char...

Page 41: ...alue display screen Ir Ii TL Is Ts I6 t I2 t I n Te Current setting Instantaneous tripping current Long time delay operating time at 200 Short time delay tripping current Short time delay operating time at Is 1 5 Long time delay lamp characteristics Short time delay lamp characteristics Rated sensitivity current Maximum operating time PROTECT ER MENU I n and Te setting values I6 t ON I6 t OFF Curr...

Page 42: ...YES on the allow changes screen and press ENTER to decide the setting Screen 3 Screen 1 Pulse unit display screen Screen 2 Pulse unit setting value Select with UP DOWN Allow changes screen Screen 3 To Measurement setting selection screen MENU SETTING MEASURE PULSE OK NO YES ENTER MENU ENTER MENU Select with UP DOWN Select NO YES with UP DOWN Select NO YES with UP DOWN Select with UP DOWN MENU SETT...

Page 43: ... alarm IDM_AL setting PU default value 100 TIME default value 2 min Select IDM_AL on the alarm setting selection screen Screen 1 Press ENTER to switch to the electric current demand alarm setting display screen Screen 2 Select either ON function enabled or OFF function disabled and press ENTER to decide the setting 1 ON function enabled setting method The pick up electric current setting value can...

Page 44: ...NG ALARM ILA_AL OK NO YES To Alarm setting selection screen Alarm setting selection screen MENU SETTING ALARM IUB_AL Electric current unbalance alarm setting display screen Allow changes screen Screen 1 Screen 2 Screen 3 MENU SETTING ALARM IUB_AL ON OFF ON OFF OK NO YES ENTER MENU ENTER To Alarm setting selection screen ENTER MENU ENTER MENU ENTER MENU Select with UP DOWN Select with UP DOWN Selec...

Page 45: ...ays OFF and press ENTER to decide the setting Select YES on the allow changes screen and press ENTER to decide the setting Screen 2 MENU SETTING LCD BACK_L LCD backlight setting display screen Allow changes screen Screen 1 Screen 2 LCD backlight setting value Select with UP DOWN MENU SETTING LCD BACK_L OK NO YES AUTO ON OFF ENTER MENU To LCD setting selection screen ENTER Allow changes screen Scre...

Page 46: ...isplay screen Screen 2 Setting value switches through NORMAL INVERS NORMAL Press ENTER to decide the setting Select YES on the allow changes screen and press ENTER to decide the setting Screen 3 Select with UP DOWN LCD setting selection screen MENU SETTING LCD VIEW View setting display screen Screen 1 Screen 2 View setting value Change with UP DOWN V VIEW H VIEW1 H VIEW2 MENU SETTING LCD BACK_L CT...

Page 47: ...6 Press ENTER to scroll through year month day hour minute allow changes screen and MENU to scroll back through allow changes screen minute hour day month year Select an item to change and then change the value with UP DOWN After setting the minute press ENTER to switch to the allow changes screen Select YES and press ENTER to decide the setting Screen 7 The year setting takes a two digit number w...

Page 48: ...ENTER MENU ENTER MENU ENTER MENU ENTER To Electric energy setting selection screen Select NO YES with UP DOWN Select with UP DOWN EP Electric energy setting EQ Reactive energy setting 1 Electric energy setting Select EP on the electric energy setting selection screen and press ENTER to switch to the electric energy setting display screen Screen 1 Press ENTER to scroll through first digit last digi...

Page 49: ...Harmonic current content ratio FREE Free display SEQ_CHK Phase sequence display ENTER MENU ENTER MENU MENU SETTING ITEM_S I ON OFF switch screen To ON OFF switch screen ON OFF Select with UP DOWN ENTER MENU Select NO YES with UP DOWN Current setting status Allow changes screen MENU SETTING ITEM_S I OK NO YES ON OFF Default value All items ON Select I on the measurement item selection screen and pr...

Page 50: ...R to decide the setting Screen 4 Press ENTER to display the allow changes screen Select YES and press ENTER to decide the setting Screen 5 Other items can be changed the same way 1 4P_L Left side of page 1 1 4P_R Right side of page 1 2 4P_L Left side of page 2 2 4P_R Right side of page 2 3 4P_L Left side of page 3 3 4P_R Right side of page 3 4 4P_L Left side of page 4 4 4P_R Right side of page 4 E...

Page 51: ...urrent line voltage electric power reactive power power factor harmonic current occurrence time of maximum minimum harmonic current content values Electric energy reactive energy fault cause current and alarms are not reset Reset all alarms at once Refer to 4 5 How to use monitoring functions for related alarm Resets PAL with alarm contact output option TRIP Resets the fault cause and the fault cu...

Page 52: ...RST ERASE INFO MENU INFO MODEL PROTECT ALARM MEASURE MENU MENU INFO PROTECT LTD Ir TL at I6 t ON 200 60 200 MENU INFO MODEL PROTECT ALARM MEASURE A s Alarm display list screen MENU INFO ALARM PAL PU TIME ON 80 30 MENU INFO MODEL PROTECT ALARM MEASURE s Measurement setting display list screen MENU INFO MEASURE PHASE LINE_S DEMAND INVERS 3P3W 3 min MENU INFO MODEL PROTECT ALARM MEASURE MENU INFO MEA...

Page 53: ...D ALL 1 2 3 PHASE VALUE Can be changed by pressing PHASE twice selecting with UP DOWN and pressing ENTER PHASE items switch through ALL 1 2 3 N only for four pole product specification ALL Items without a PHASE element are displayed as I ITEM PHASE VALUE ALL CURRENT A V ITEM PHASE VALUE ALL CURRENT P ITEM PHASE VALUE CURRENT k W 0 0 1 2 3 0 0 0 0 0 0 V 1 2 2 3 3 1 0 0 0 0 0 0 VALUE items switch th...

Page 54: ...E VALUE DEMAND k W h 0 EP ITEM 1 7 0 1 0 1 0 0 0 0 PHASE VALUE D_MAX k W h 0 I ITEM PHASE VALUE ALL DEMAND I ITEM PHASE VALUE D_MAX A 340 0 1 7 0 1 0 1 0 0 2 5 I ITEM PHASE VALUE D_MAX_P A 0 0 V ITEM PHASE VALUE ALL CURRENT V ITEM PHASE VALUE AVE CURRENT V V ITEM PHASE VALUE MAX V 420 0 0 1 7 0 1 0 1 0 0 2 5 DT 3min DT 3min P ITEM PHASE VALUE CURRENT k W P ITEM PHASE VALUE DEMAND k W DT 3min P ITE...

Page 55: ...PHASE VALUE ALL DEMAND HI A ITEM PHASE VALUE D_MAX A HI A ITEM PHASE VALUE M1St A 313 134 1 7 0 1 0 1 0 0 2 5 1 7 0 1 0 1 0 0 2 5 DT 3min DT 3min HI A ITEM PHASE VALUE ALL Total A 1 2 3 0 0 0 0 0 0 M1sｔ HI A ITEM PHASE VALUE M3rd A 102 1 7 0 1 0 1 0 0 2 5 M3rd HI A ITEM PHASE VALUE M19th A 17 6 1 7 0 1 0 1 0 0 2 5 M19th Total HI A ITEM PHASE VALUE ALL 1St A 1 2 3 0 0 0 0 0 0 1st HI A ITEM PHASE VA...

Page 56: ...ALUE PHASE ITEM k v a r h Latest one hour amount One hour amount maximum value EQ DEMAND VALUE PHASE ITEM k v a r h 0 79 EQ D_MAX VALUE PHASE ITEM k v a r h 0 1 7 0 1 0 1 0 0 0 0 LAG 2 Vertical display view setting H VIEW1 1 Load current 2 Line voltage 3 Electric power 4 Reactive power 5 Electric energy 6 Reactive energy 7 Power factor 8 Frequency V ALL CURRENT VALUE PHASE ITEM V 1 2 2 3 3 1 0 0 0...

Page 57: ...1 0 0 2 5 HI A ALL DEMAND VALUE PHASE ITEM A DT 3min DT 3min HI A M1St VALUE PHASE ITEM A 313 1 7 0 1 0 1 0 0 2 5 1 2 0 0 3 0 0 0 0 19th 1 2 0 0 3 0 0 0 0 M1st HI A M3rd VALUE PHASE ITEM A 1 7 0 1 0 1 0 0 2 5 M3rd HI A M19th VALUE PHASE ITEM A 17 6 1 7 0 1 0 1 0 0 2 5 M19th FREE1 4 VALUE PHASE ITEM 1 4 PAG E I 1 CUR I 1 DM min A 0 0 min A 0 0 FREE4 4 VALUE PHASE ITEM 4 4 PAG E min min ALARM VALUE ...

Page 58: ... NST TRIP ITEM PHASE VALUE TR I P A 11328 ALARM ITEM PHASE VALUE AL AR M PAL I DM _ AL I L A _ AL I U B _ AL OVER The fault cause due to the instantaneous tripping of the 250 A frame becomes effective when the MDU transmission alarm switch option is installed Also if a fault that exceeds the measurement upper limit fault current 16 times the maximum rated current occurs the fault factor fault curr...

Page 59: ...gy and reactive energy When items are set or cleared the non volatile memory storage will be overwritten for all of these except for the items described in 7 1 2 4 Setting method for day and time It takes some time to overwrite the non volatile memory storage and items may not be properly overwritten in the non volatile memory if they are set or cleared in quick succession Therefore as shown in th...

Page 60: ... 06h Error details Solution 2 With MODBUS transmission option Check the following if your device appears to be failing 1 Is the MDU applied control power 2 Nothing is displayed on the display Is the connection cable connector fully plugged in Is it disconnected 3 The device is powered but the current is 0 A If the electric current measurement value is less than the measurement lower limit current ...

Page 61: ...30 57 4 4441284 20 2 27961337 30 211 1206 900 91 124 4630300 62 0 21 6610651 9 856 20 415899 356 0 21 697 816 95 0 1 202589 977 1 4411330 47 0 55 506000 92 0 42 35752323 92 0 42 35753373 92 0 42 37631632 63 0 2 634 8691 966 1 4770149 65 6473 2308 34 0 93 565 3131 58 212 241 9952 84 28 3910 5945 84 24 3937 8075 ...

Page 62: ...MEMO ...

Page 63: ......

Page 64: ...Nov 2019 LN107A330H02 IB63E30 A 1911 MEE MDU Breakers ...

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