Mitsubishi Electric MELPRO-D Series Instruction Manual
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Mitsubishi Electric MELPRO-D Series Instruction Manual

Mitsubishi Electric MELPRO-D Series Instruction Manual

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CGP2-A41D1/CGP2-A42D1
■For the latest version of this instruction manual, please download from the URL below.
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JEP0-IL9543

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  • Page 1 CGP2-A41D1/CGP2-A42D1 ■For the latest version of this instruction manual, please download from the URL below. http://www.mitsubishielectric.co.jp/fa/download/search.do?mode=manual&kisyu=/pror JEP0-IL9543...
  • Page 2 － Safety precautions － Before installation, operation, maintenance, and inspection, please be sure to read this instruction manual and all other attached documents thoroughly in order to work safely with the equipment. Please ensure that you fully understand the equipment, safety information, and precautions that need to be taken before working with the equipment.
  • Page 3 Caution  Ensure that the equipment is mounted and connected correctly. Otherwise, there are risks of failure, burning, or maloperation..  Securely tighten the terminal connection screws. Otherwise, there are risks of failure and burning.  For tightening torque of screws, refer to the following Table. Standard value of torque Place of use Nominal dia.
  • Page 4 [Maintenance and Inspection] Danger The equipment must only be operated and handled by qualified personnel. Otherwise, there are risks of electric shock, injury, failure, malfunction, and maloperation. Handling and maintenance of the equipment must only be carried out after gaining a thorough understanding of the instruction manual.
  • Page 5 Regardless of the gratis warranty term, MITSUBISHI ELECTRIC CORPORATION shall not be liable for compensation of damages caused by any cause found not be the responsibility of MITSUBISHI ELECTRIC CORPORATION, loss in opportunity, lost profits incurred to the user by failures of MITSUBISHI ELECTRIC...
  • Page 6 MITSUBISHI ELECTRIC CORPORATION prior to such applications. If the user applies MITSUBISHI ELECTRIC CORPORATION products to such applications without any contact to our technical section, MITSUBISHI ELECTRIC CORPORATION shall not be liable for any items and not be insured, independently from mentioned in this clause.
  • Page 7 Introduction – D Series Digital Protection Relay. Thank for your purchasing MITSUBISHI ELECTRIC MELPRO Please read this instruction manual carefully to be familiar with the functions and performances enough to use the product properly. It is necessary to forward this instruction manual to end users and a person in charge of maintenance.

  • Page 8: Table Of Contents

    INDEX General description ..........................10 Structure ..............................11 2.1. Front view of relay ..........................11 2.2. Terminal layout on the back of relay ..................... 12 2.3. Dimensions of relay and Cut-Out dimensions of panel ................. 13 2.4. External view of relay ........................... 14 Handling, Mounting..........................
  • Page 9 5.3.4.3.4. Trip counter (TRIP COUNTER) menu ....................67 5.3.4.3.5. Disturbance record (DISTURBANCE) menu ..................68 5.3.4.3.6. DI voltage (DI VOLTAGE) menu......................69 5.3.4.3.7. Password use/unuse (PASSWORD USE) menu .................. 70 5.3.4.3.8. Password registration (PASSWORD REGIST) menu ................71 5.3.4.4. TEST menu ............................72 5.3.4.4.1.

  • Page 10: General Description

    General description – D Series is a digital protection relay product with a microprocessor for Mitsubishi Electric MELPRO protection of high/extra-high voltage electric power systems. With its improved functions, such as PLC (Programmable Logic Controller), data saving at the time when relay elements are operated, and measurement of input value, this series of protection relay allows stable and effective control and monitoring of electric power systems as well as high-reliable protection.

  • Page 11: Structure

    Structure 2.1. Front view of relay For the details about front panel, refer to Section 5.1. RUN LED (green) ALARM LED (red) Operation display Push-button LEDs switches USB 2.0 port for PC connection (Type B) Fig. 2-1 Front view of relay JEP0-IL9543...

  • Page 12: Terminal Layout On The Back Of Relay

    2.2. Terminal layout on the back of relay M4 screw For DI M3.5 screw (ground terminal) (M3.5 screw) (for terminal block) For power supply and DO (M3.5 screw) For input current / voltage to relay (M3.5 screw) M5 screw (for mounting on main body) Fig.

  • Page 13: Dimensions Of Relay And Cut-Out Dimensions Of Panel

    2.3. Dimensions of relay and Cut-Out dimensions of panel Fig. 2-4 Dimensions of relay Fig. 2-5 Cut-Out dimensions of panel JEP0-IL9543...

  • Page 14: External View Of Relay

    2.4. External view of relay Outer case (Made from metal) Subunit Fixing screw for subunit (with cover) Push-button switches Fixing screw for mounting USB 2.0 port (with cover) Fig. 2-6 External view of relay JEP0-IL9543...

  • Page 15: Handling, Mounting

    Handling, Mounting 3.1. Unpacking Usually this relay is packed in a case for transportation. However, it may occur that only the sub-unit is transported independently for the convenience at repair. In such a case, fully brush off the dust, dirt, etc. adhered to the sub unit after completion of unpacking, and further visually check that the parts mounted on the front panel or built in the sub unit are not damaged.

  • Page 16: Procedures For Drawing Out Subunit

    3.3.1. Procedures for drawing out subunit (1) Removing screws When drawing out the subunit from the outer Screw case, open upper & lower screw covers at the (with cover) front side of the subunit and detach both screws. Screw (with cover) (2) Drawing out the subunit Draw out subunit horizontally by using fingers on the upper &...

  • Page 17: Mounting

    3.4. Mounting When inserting this relay into control panel, take care in order not to damage it. Panel After inserting, fix this relay with washers and nuts which are supplied with the product. M5 nut Accessories Flat washer Spring washer Fixing stud Section 2.3 explains Cut-Out dimensions of panel.

  • Page 18: Connection

    The control power supply of the relay is not guaranteed against power interruption. When you do not have an uninterruptible power supply (UPS), please purchase it that is made by Mitsubishi Electric or commercially available. When you select UPS, please confirm rated values, ambient temperature, and other service conditions.

  • Page 19: Terminal Layout

    (6) Trip circuit There are two kinds of output contacts for the trip circuits and the control circuits. Please keep in mind that the output contacts for control circuits cannot be used for the trip circuit. (If used, the contact may burn.) Connect the pallet contact (52a) of the circuit breaker to the trip circuit.

  • Page 20: External Connection

    4.3. External connection 4.3.1. Connection example of control circuit Self- B-21 Moni- B-03 ＋ diagnosis Control toring B-22 output power B-04 contact B-05 supply Time-delay B-06 contact B-07 (Normally-open) Contacts for tripping B-08 Approx. 4 s Connect to trip circuits B-09 (e.g.

  • Page 21: Connection Example Of Input Circuit

    4.3.2. Connection example of input circuit This figure shows concept of the connection to the relay. Therefore, the position or condition of CT, VT, and other devices sometimes differs from the actual state. ＋ A B C B-03 Control B-21 Moni- Self-diagnosis power...
  • Page 22 ＋ A B C B-03 Control B-21 Moni- Self-diagnosis power toring output contact B-04 supply B-22 A-15 B-05 B-06 A-16 B-07 Current ratio differential (A, B, or C phase) Contacts A-01 B-08 B-09 tripping A-02 Loss of field B-10 B-11 A-03 B-12 A-04...
  • Page 23 ＋ A B C B-03 B-21 Moni- Auxiliary Self-diagnosis toring Power supply output contact B-04 B-22 A-15 B-05 B-06 A-16 B-07 Current ratio differential (A, B, or C phase) Contacts A-01 B-08 B-09 tripping A-02 Loss of field B-10 B-11 A-03 B-12 A-04...
  • Page 24 ＋ A B C B-03 B-21 Moni- Control Self-diagnosis power toring output contact B-04 B-22 supply B-05 B-06 B-07 Contacts A-01 Current ratio differential B-08 (A, B, or C phase) B-09 tripping A-02 B-10 B-11 A-03 B-12 A-04 B-13 Current ratio differential A-05 A-phase B-14...

  • Page 25: Human Machine Interface

    This chapter describes about “(1) Operation from the front panel” by pushbuttons and the indication display. The operation method (2) is described in a separate volume. Please refer to the following document. Title of document Document No. MELPRO-D Series Protection Relay JEP0-IL9504 PC-HMI Instruction Manual 5.1. Pushbutton switches and indication display This section describes the pushbuttons and indication display on the front panel.
  • Page 26 PICKUP TRIP OP-LOCK DIFF-A DIFF-B DIFF-C Fig. 5-2 Operation display LEDs of CGP2-A41D1 PICKUP TRIP OP-LOCK DIFF-A DIFF-B DIFF-C Fig. 5-3 Operation display LEDs of CGP2-A42D1 JEP0-IL9543...
  • Page 27 Table 5-1 Description of front panel Name Description VFD (Vacuum Fluorescent Display) Shows various menus and values of the DISPLAY/SETTING mode. If you has not operated any push buttons for more than 30 minutes, the (18 characters x 2 lines) VFD is automatically turned off.

  • Page 28: List Of Menus

    5.2. List of menus The operation mode includes the DISPLAY and SETTING modes, which respectively have different menus. Table 5-2 lists the menus available in the respective modes. Table 5-2 List of menu : DISPLAY only ʘ: DISPLAY and SETTING : Not shown Menu Operation mode...

  • Page 29: Operation Method

    5.3. Operation method This section describes the operations for mode selection and various menus. 5.3.1. DISPLAY/SETTING mode selection Press a key except for ESC/C when VFD is OFF to show the DISPLAY/SETTING mode selection screen. The DISPLAY and SETTING modes offer different sets of menus available. For the details about the menus in the respective modes, see Table 5-2.

  • Page 30: Display Mode Menu Operations

    5.3.2. DISPLAY mode menu operations This subsection describes the menu operations in the DISPLAY mode. The menu screen has five selectable items. Use the Up and Down keys to select the item and press SELECT. For the details about the menus available in the DISPLAY mode, see Table 5-2. ＤＩＳＰＬＡＹ　ＭＯＤＥ　　　　　...

  • Page 31: Status (Status) Menu

    5.3.2.1. Status (STATUS) menu This subsection describes the Status (STATUS) menu. The Status menu shows the current time, measured value, DI/DO status, trip counter, device name and Software version. ＳＴＡＴＵＳ　　　　　 ：ＣＬＯＣＫ ＳＴＡＴＵＳ　 ：ＭＥＴＥＲＩＮＧ ＳＴＡＴＵＳ ESC/C SELECT ENTER ：ＤＩＧＩＴＡＬ　Ｉ／Ｏ 、　で項目を切替え、 Use ▲ and ▼ to switch between items SELECTで項目選択。...

  • Page 32: Clock (Clock) Menu

    5.3.2.1.1. Clock (CLOCK) menu [Operation path] DISPLAY MODE > STATUS > CLOCK The clock (CLOCK) menu allows viewing of the current time and synchronization type. ＣＬＯＣＫ　　　　　　　　（ＬＯＣＡＬ） ２０１７－０１－０１　００：００：００ The text in the upper right part of the screen indicates the synchronization type for the time shown. (Part showing “LOCAL”...

  • Page 33: Measured Analog Value (Metering) Menu

    5.3.2.1.2. Measured analog value (METERING) menu [Operation path] DISPLAY MODE > STATUS > METERING The Measured analog value (METERING) menu allows viewing of the current measured value. The Configuration menu can specify the measured value of the primary or secondary value of CT/VT. For the setting procedure, see 5.3.4.3.3.
  • Page 34 Table 5-3 Measured value display items ・CGP2-A41D1 Signal name Unit (primary/secondary) Signal name Unit (primary/secondary) A / A kV / V A / A I1a-ph °LAG / °LAG A / A I1b-ph °LAG / °LAG A / A I1c-ph °LAG / °LAG A / A I2a-ph °LAG / °LAG...

  • Page 35: Di/Do Status (Digital I/O) Menu

    5.3.2.1.3. DI/DO status (DIGITAL I/O) menu [Operation path] DISPLAY MODE > STATUS > DIGITAL I/O The DI/DO status (DIGITAL I/O) menu allows viewing of the current DI/DO. ＤＩＧＩＴＡＬ　Ｉ／Ｏ ＤＩ１　　　　：ＯＦＦ ESC/C SELECT ENTER ＤＩＧＩＴＡＬ　Ｉ／Ｏ 、　で表示項目変更 Use ▲ and ▼ to change the display item ＤＯ８　　　：ＯＦＦ...

  • Page 36: Trip Counter (Trip Counter) Menu

    5.3.2.1.4. Trip counter (TRIP COUNTER) menu [Operation path] DISPLAY MODE > STATUS > TRIP COUNTER The Trip counter (TRIP COUNTER) menu allows viewing of the number of trips. ＴＲＩＰ　ＣＯＵＮＴＥＲ Ｔｒｉｐ　ＣＮＴ　：　　　　　０ 5.3.2.1.5. Device name (DEVICE NAME) menu [Operation path] DISPLAY MODE > STATUS > DEVICE NAME The Device name (DEVICE NAME) menu allows viewing of the device name.

  • Page 37: Record (Record) Menu

    5.3.2.2. Record (RECORD) menu This subsection describes the operation logs in the Record (RECORD) menu. The Record menu allows viewing four types of log data. (Fault record, Event record, Access record and Alarm record) ＲＥＣＯＲＤ　　　　　　　　　　 ：ＦＡＵＬＴ　ＲＥＣＯＲＤ ＲＥＣＯＲＤ　　　　　　　　　　 ：ＥＶＥＮＴ　ＲＥＣＯＲＤ ESC/C SELECT ENTER ＲＥＣＯＲＤ　　　　　　　　　　...

  • Page 38: Fault Record (Fault Record) Menu

    5.3.2.2.1. Fault record (FAULT RECORD) menu [Operation path] DISPLAY MODE > RECORD > FAULT RECORD The Fault record (FAULT RECORD) menu allows viewing of the time, operating values and operating elements when the fault is detected. Fault records of up to five phenomena are stored and the respective fault record can be viewed.
  • Page 39 After a fault record is selected, use the Up and Down keys to view the trip factors and measured values. ＦＡＵＬＴ　ＲＥＣ　　＃　　１　　　 Trip factor 動作要因 ＤＩＦＦ－Ａ　Ｔｒｉｐ ＦＡＵＬＴ　ＲＥＣ　　＃　　１　　　 Measured value 計測値 Ｉ１ａ　　　 　　：　　　　　　０Ａ ＦＡＵＬＴ　ＲＥＣ　　＃　　１　　　 Measured value 計測値 Ｖａｂ－Ｐｈ　　：　　　　　０°ＬＡＧ Note: This is an example. Table 5-5 Elements of fault records (CGP2-A41D1) Element name displayed DIFF-A Trip...
  • Page 40 Table 5-7 Measured values of fault records (CGP2-A41D1) Signal name Unit °LAG I1a-ph °LAG I1b-ph °LAG I1c-ph °LAG I2a-ph °LAG I2b-ph °LAG I2c-ph °LAG Vab-ph Table 5-8 Measured values of fault records (CGP2-A42D1) Signal name Unit °LAG I1a-ph °LAG I1b-ph °LAG I1c-ph °LAG...

  • Page 41: Event Record (Event Record) Menu

    5.3.2.2.2. Event record (EVENT RECORD) menu [Operation path] DISPLAY MODE > RECORD > EVENT RECORD The Event record (EVENT RECORD) menu allows viewing of event records saved. Event records of up to 512 events are stored and the respective event record can be viewed. Press the Up and Down keys to switch the indication on the screen as below.
  • Page 42 Table 5-9 List of event record (CGP2-A41D1) Event name Status of DI1 Status of DI2 Status of DI3 Status of DI4 Status of DI5 Status of DI6 Status of DI7 Status of DI8 Status of DO1 Status of DO2 Status of DO3 Status of DO4 Status of DO5 Status of DO6...
  • Page 43 RY-LOCK Locking of relay SV-LK Locking of supervision TCNT-LK Locking of trip counter OR of all “definitive signal AND operation lock signal” ALLEL-O Pulse signal from start-up until the end of data saving DS_TRIG (Except for pre-fault time) DIFF-A Definitive signal of DIFF A-phase or forced operation from PC-HMI DIFF-B Definitive signal of DIFF B-phase or forced operation from PC-HMI DIFF-C...
  • Page 44 Table 5-10 List of event record (CGP2-A42D1) Event name Status of DI1 Status of DI2 Status of DI3 Status of DI4 Status of DI5 Status of DI6 Status of DI7 Status of DI8 Status of DO1 Status of DO2 Status of DO3 Status of DO4 Status of DO5 Status of DO6...
  • Page 45 RY-LOCK Locking of relay SV-LK Locking of supervision TCNT-LK Locking of trip counter OR of all “definitive signal AND operation lock signal” ALLEL-O Pulse signal from start-up until the end of data saving DS_TRIG (Except for pre-fault time) DIFF-A Definitive signal of DIFF A-phase or forced operation from PC-HMI DIFF-B Definitive signal of DIFF B-phase or forced operation from PC-HMI DIFF-C...

  • Page 46: Access Record (Access Record) Menu

    5.3.2.2.3. Access record (ACCESS RECORD) menu [Operation path] DISPLAY MODE > RECORD > ACCESS RECORD The Access record (ACCESS RECORD) menu allows viewing of the saved access records. Access records of up to 512 accesses are stored and the records for the respective accesses can be viewed. Press the Up and Down keys to switch the indication on the screen as below.
  • Page 47 Access record description registered (operator) Display item Operation description Front panel PC-HMI Automatic cancelation on device Access record description registered (operation description) Display item Operation description Change of active setting group CHG_ACT_SET_G Change of configuration of DI voltage CHG_DI_VOLTAGE Change of configuration of disturbance record CHG_DIST_REC_T Change of password use setting CHG_USE_PASSWD...

  • Page 48: Alarm Record (Alarm Record) Menu

    5.3.2.2.4. Alarm record (ALARM RECORD) menu [Operation path] DISPLAY MODE > RECORD > ALARM RECORD The Alarm record (ALARM RECORD) menu allows viewing of the saved alarm records. Alarm records of up to 200 alarms are stored and the records for the respective alarms can be viewed. Press the Up and Down keys to switch the indication on the screen as below.

  • Page 49: Setting (Setting) Menu

    5.3.2.3. Setting (SETTING) menu The Setting menu can be selected in either DISPLAY or SETTING mode but the DISPLAY mode only allows viewing of the setting values. The setting values can be changed only in the SETTING mode. For operations for the Setting menu, see 5.3.4.1. 5.3.2.4.

  • Page 50: Password Input Screen

    5.3.3. Password input screen If the password use/unuse setting is “USE,” a four-digit password is requested when the SETTING mode is selected. * For the password use/unuse setting, see 5.3.4.3.7. For how to set the password input, see 5.3.4.3.8. ＩＮＰＵＴ　ＰＡＳＳＷＯＲＤ　　 ESC/C SELECT ENTER...

  • Page 51: Setting Mode Menu Operations

    5.3.4. SETTING mode menu operations This subsection describes the SETTING mode menu. The menu screen has five selectable items. Use the Up and Down keys to select the item and press SELECT. For the details about the menus available in the SETTING mode, see Table 5-2. ＳＥＴＴＩＮＧ　ＭＯＤＥ　　　...

  • Page 52: Setting (Setting) Menu

    5.3.4.1. Setting (SETTING) menu The Setting (SETTING) menu allows viewing/changing of the active setting group and viewing/changing of the group setting values. The Setting menu can be selected in either DISPLAY or SETTING mode but the setting values can be changed only in the SETTING mode.

  • Page 53: Active Group (Active Wg) Menu

    5.3.4.1.1. Active group (ACTIVE WG) menu [Operation path] SETTING MODE > SETTING > ACTIVE WG The Active group (ACTIVE WG) menu allows changing of the active group numbers setting. (Active group numbers can be changed only in the SETTING mode. The DISPLAY mode allows only viewing of the current group numbers.) ＡＣＴＩＶＥ　ＷＧ...

  • Page 54: Group 1 Setting (G1) And Group 2 Setting (G2) Menus

    5.3.4.1.2. Group 1 setting (G1) and Group 2 setting (G2) menus [Operation path] SETTING MODE > SETTING > G1(G2) The Group 1 setting (G1) and Group 2 setting (G2) menus allow viewing and changing of the setting values for the respective group settings. (Setting values can be changed only in the SETTING mode.
  • Page 55 3. The cursor moves to the setting parameter indication. Use the Up and Down keys to select the setting parameter to be changed and press SELECT. The cursor moves to the setting value indication. Cursor moves to the setting カーソルが整定項目に移動。 parameter indication.

  • Page 56: Control (Control) Menu

    5.3.4.2. Control (CONTROL) menu The Control (CONTROL) menu allows viewing/changing of Control mode and CB control. The Control menu can be selected in either DISPLAY or SETTING mode but the DISPLAY mode only allows viewing of the setting of Control mode. In the SETTING mode, both Control mode and CB control can be shown and set.

  • Page 57: Control Mode (Ctrl Mode) Menu

    5.3.4.2.1. Control mode (CTRL MODE) menu [Operation path] SETTING MODE > CONTROL > CTRL MODE The Control mode (CTRL MODE) menu allows setting of the Local/remote control, Interlock selection and Circuit breaker operation blocking. (Note that they can be set only in the SETTING mode. The DISPLAY mode only allows viewing of the settings.) 1.
  • Page 58 Table 5-11 Setting items of Control mode Item Description Setting range Unit REMOTE/LOCAL Remote / Local setting R / L INTERLOCK Interlock unuse/use selection setting UNUSE / USE CB OPEN CB open control operation block setting UNBLK / BLK CB CLOSE CB close control operation block setting UNBLK / BLK ON TIMER...

  • Page 59: Cb Control (Cb Control) Menu

    5.3.4.2.2. CB Control (CB CONTROL) menu [Operation path] SETTING MODE > CONTROL > CB CONTROL The CB control (CB CONTROL) menu allows CB open control/CB close control. This item can be selected for implementing CB control only in the SETTING mode. For CB control, the control mode settings must be as shown in the table below.
  • Page 60 2. The display switches to the CB status indication screen. Press the Up and Down keys to cycle through items of CB status indication. 3. After confirming the CB status, press the ENTER key while the CB status indication screen is shown. The following screen appears to confirm whether to execute CB control.

  • Page 61: Configuration (Config) Menu

    5.3.4.3. Configuration (CONFIG) menu This subsection describes the operations for the Configuration (CONFIG) menu. The Configuration menu can be selected in either DISPLAY or SETTING mode. Clock adjustment (CLOCK ADJUST), Password use/unuse (PASSWORD USE) and Password registration (PASSWORD REGIST) can be selected only in the SETTING mode.

  • Page 62: Communication Setting (Communication) Menu

    5.3.4.3.1. Communication setting (COMMUNICATION) menu [Operation path] SETTING MODE > CONFIG > COMMUNICATION In regard to the standard products, there is no communication function. In this menu, the message "NONE" appears on the display. ＣＯＭＭＵＮＩＣＡＴＩＯＮ　　　　　 ：ＮＯＮＥ JEP0-IL9543...

  • Page 63: Clock Adjustment (Clock Adjust) Menu

    5.3.4.3.2. Clock adjustment (CLOCK ADJUST) menu [Operation path] SETTING MODE > CONFIG > CLOCK ADJUST The Clock adjustment (CLOCK ADJUST) menu allows time setting. This item can be selected only in the SETTING mode. 1. When the Clock adjustment menu is selected, the current time is indicated as shown below. Pressing SELECT while this screen is shown allows changing of the year, month, day, hour, minute and second settings.
  • Page 64 4. Press SELECT to change the setting value. ＣＦＧ－ＣＬＯＣＫ　　　 ＭＯＮＴＨ　　　：　　　１１ 5. Complete setting of all other items to change by repeating steps 1. to 3.. 6. Press ENTER and the confirmation message of the time setting appears. Press SELECT to apply the time setting changed by steps 1. to 4. and complete the Clock adjustment setting.

  • Page 65: Analog Value Display Switching (Metering) Menu

    5.3.4.3.3. Analog value display switching (METERING) menu [Operation path] SETTING MODE > CONFIG > METERING The Analog value display switching (METERING) menu allows configuration of the following settings. (1) Set the indication type from the primary or secondary side of CT/VT (2) Set the rating of CT/VT.
  • Page 66 1. Use the Up and Down keys to select the item to change and press SELECT for selection. ＣＦＧ－ＭＥＴＥＲＩＮＧ　　　　　 ＡＩ　Ｄｉｓｐ．　：ＰＲＩＭＡＲＹ 2. The cursor moves to the setting value. Use the Up and Down keys to select the value and the Left and Right keys to select the digit to make the change.
  • Page 67 5.3.4.3.4. Trip counter (TRIP COUNTER) menu [Operation path] SETTING MODE > CONFIG > TRIP COUNTER The Trip counter (TRIP COUNTER) menu allows setting of the initial counter and alarm counter values. The trip counter will count the number of trip times. (The DISPLAY mode only allows viewing of the setting values) ＣＦＧ－ＴＲＩＰ　ＣＯＵＮＴＥＲ　　　...
  • Page 68 5.3.4.3.5. Disturbance record (DISTURBANCE) menu [Operation path] SETTING MODE > CONFIG > DISTURBANCE The Disturbance record (DISTURBANCE) menu allows setting of maximum recording time and pre-fault recording time of each disturbance (fault) record. (The DISPLAY mode only allows viewing of the setting values) ＣＦＧ－ＤＩＳＴＵＲＢＡＮＣＥ...
  • Page 69 5.3.4.3.6. DI voltage (DI VOLTAGE) menu [Operation path] SETTING MODE > CONFIG > DI VOLTAGE The DI voltage (DI VOLTAGE) menu allows setting of the DI rated voltage. (The DISPLAY mode only allows viewing of the setting values) 1. In the DI voltage setting menu, display the item “DI” and press the SELECT key. * The DI voltage setting menu has one item: “DI”...
  • Page 70 5.3.4.3.7. Password use/unuse (PASSWORD USE) menu [Operation path] SETTING MODE > CONFIG > PASSWORD USE The Password use/unuse (PASSWORD USE) menu specifies whether to use or not use a password input when the SETTING mode is selected. (This item is not shown in the DISPLAY mode) ＳＥＴ－ＣＯＮＦＩＧ　　　　　...
  • Page 71 5.3.4.3.8. Password registration (PASSWORD REGIST) menu [Operation path] SETTING MODE > CONFIG > PASSWORD REGIST The Password registration (PASSWORD REGIST) menu allows the setting of the password input when the SETTING mode is selected. (This item is not shown in the DISPLAY mode) ＳＥＴ－ＣＯＮＦＩＧ　　　　　...
  • Page 72 5.3.4.4. TEST menu This subsection describes the operations for the Test menu. The Test menu can be selected only in the SETTING mode. ＴＥＳＴ　　　　　 ：ＣＯＮＴＡＣＴ　ＴＥＳＴ ＴＥＳＴ　　　　　 ESC/C ENTER SELECT ：ＭＯＤＥ 、　で項目を切替え、 Use ▲ and ▼ to switch between items SELECTで項目選択。 ＴＥＳＴ　　　　　...
  • Page 73 3. The cursor moves to the setting of the selected item. Use the Up and Down keys to switch the setting. Select ON to conduct a contact test on the selected DO. If not, select OFF. ＣＯＮＴＡＣＴ　ＴＥＳＴ ＤＯ１－Ｔ　　　 ： ■ ＦＦ 4.
  • Page 74 5.3.4.4.2. Test mode (MODE) menu [Operation path] SETTING MODE > TEST > MODE The Test mode (MODE) menu allows setting of the test mode. 1. Use the Up and Down keys to select the item to set and press SELECT. ＭＯＤＥ　　　　　...
  • Page 75 5.3.4.4.3. LED/VFD lighting test (LED/VFD TEST) menu [Operation path] SETTING MODE > TEST > LED/VFD TEST The LED/VFD lighting test (LED/VFD TEST) menu allows lighting of all LEDs/VFDs. When LED/VFD TEST is selected in the Test menu, a screen as shown below appears. Pressing ENTER and all LEDs and VFDs are lighting while the key is held down.
  • Page 76 5.3.4.5. Clear record (RECORD-CLR) menu The Clear record (RECORD-CLR) menu allows clearing three types of log data: fault, event and alarm records. *Access record log data cannot be cleared. ＲＥＣＯＲＤ－ＣＬＲ ：ＦＡＵＬＴ　ＲＥＣＯＲＤ ＲＥＣＯＲＤ－ＣＬＲ ESC/C SELECT ENTER ：ＡＬＡＲＭ　ＲＥＣＯＲＤ 、　で項目を切替え、 Use ▲ and ▼ to switch between items SELECTで項目選択。...
  • Page 77 5.3.4.5.2. Clear alarm record (ALARM REC CLEAR) menu [Operation path] SETTING MODE > RECORD-CLR > ALARM RECORD The Clear alarm record (ALARM REC CLEAR) menu allows clearing of alarm records. In the Clear record menu, select ALARM RECORD and press ENTER. Then, the next screen appears. Press SELECT to clear the alarm records.
  • Page 78 PC-HMI is a software for setting, configuration, and supervision of this relay. The software can be downloaded on the web site of Mitsubishi Electric FA (Factory Automation). The operation method is described in a separate volume. Please refer to the following document.
  • Page 79 Table 6-1 PLC signals of CGP2-A41D1 Signal name Description Status of DI1 Status of DI2 Status of DI3 Status of DI4 Status of DI5 Status of DI6 Status of DI7 Status of DI8 TCNT_ALM Alarm of trip counter DIFSV-A Definitive signal of supervision of differential current on A phase DIFSV-B Definitive signal of supervision of differential current on B phase DIFSV-C...
  • Page 80 OPLK-DIFC Operation lock on DIFF element of C phase OPLK-LOF Operation lock on LOF element “Definitive signal of DIFF on A phase” AND “Operation lock signal” DIFF_A-T “Definitive signal of DIFF on B phase” AND “Operation lock signal” DIFF_B-T “Definitive signal of DIFF on C phase” AND “Operation lock signal” DIFF_C-T “Definitive signal of LOF”...
  • Page 81 Table 6-2 PLC signals of CGP2-A42D1 Signal name Description Status of DI1 Status of DI2 Status of DI3 Status of DI4 Status of DI5 Status of DI6 Status of DI7 Status of DI8 TCNT_ALM Alarm of trip counter DIFSV-A Definitive signal of supervision of differential current on A phase DIFSV-B Definitive signal of supervision of differential current on B phase DIFSV-C...
  • Page 82 “Definitive signal of DIFF on C phase” AND “Operation lock signal” DIFF_C-T DIFF_A-TL Latch signal of DIFF_A-T (*) DIFF_B-TL Latch signal of DIFF_B-T (*) DIFF_C-TL Latch signal of DIFF_C-T (*) (*) Note: The latch signal can be reset by pushing ESC/C button for 3 seconds or longer. JEP0-IL9543...
  • Page 83 Rating, Specification 7.1. Features Multi-function ▪ The relay incorporates a variety of protection functions which are required for generator protection. ▪ The relay has two Group settings sets. Therefore, it can be used for different purposes, such as operation/test, or quickly adapted to meet load conditions. ▪...
  • Page 84 7.2. Standard Ratings Item Contents Current Line voltage 57 ~ 120 V Frequency 50 Hz / 60 Hz DC 110 V (Variation range: 88 ~ 150 V) DI input voltage Rating DC 220 V (Variation range: 176 ~ 300 V) DC: 100 ~ 220 V Voltage AC: 100 ~ 220 V...
  • Page 85 7.3. Protection elements Protection element Operating value Operating time Other setting 0.00 ~ 10.00 s (0.01 s step) Current ratio Minimum operating current: differential 0.4 ~ 1.0 A (0.1 A step) In setting 0.00 s, (DIFF) Ratio: 5 ~ 50 % (1 % step) instantaneous operating time is less than 50 ms.
  • Page 86 7.4. Measuring element ・CGP2-A41D1 Waveform Contents displayed Range Measured value Accident record record Name of (Secondary value / Item Primary Secondary Primary only Common signal Primary value) A-phase current on     output side B-phase current on  ...
  • Page 87 ・CGP2-A42D1 Waveform Contents displayed Range Measured value Accident record record Name of (Secondary value / Item Primary Secondary Primary only Common signal Primary value) A-phase current on     output side B-phase current on     output side C-phase current on ...
  • Page 88 7.5. List of functions Operation system Menu Item PC-HMI Front panel   Clock (CLOCK)   Measured analog value (METERING)   DI/DO status (DIGITAL I/O) Status   Trip counter (TRIP COUNTER) (STATUS)   Device name (DEVICE NAME) ...
  • Page 89 Protective function In the relay, following protection elements are provided for the purposes of generator protection. In this chapter, the protection elements incorporated in the relay are described. CGP2-A41D1 only Model Protection elements Input Purpose CGP2-A41D1 87G, 40 I1a, I1b, I1c, I2a, I2b, I2c (6 phase) Vab (1 phase) CGP2-A42D1 87G...
  • Page 90 8.1. Current ratio differential element A current ratio differential element is incorporated in CGP2-A41D1 and CGP2-A42D1, and this enables rapid detection of faults in a generator. Apparatus Display name Protective function DIFF Current ratio differential element JEP0-IL9543...
  • Page 91 8.1.1. DIFF element Fig. 8-1 shows the internal function blocks of DIFF element. The DIFF element takes in the inflow current (generator’s neutral side) and the outflow current (generator’s output side) and calculates the differential current and the restraint current (*) inside the relay.
  • Page 92 * [ ] shows setting values. |ID| ≥ [ratio K2] x (|IR| - [Is Curt.]) + [ratio K1] x [Is Curt.] Differential current During periods of |ID| one-end inflow |ID|＝|IR| DIFF’s operating |ID| ≥ [ratio K1] x |IR| range [Ope. Curt.】 Restraint current [Is Curt.]...
  • Page 93 *1 Setting the ratio K1 and ratio K2 Normally, as shown in Fig. 8-3, increase the ratio setting in the large current area (ratio K1 < ratio K2) to expand the non-operating area. Or, as shown in Fig. 8-4, set the non-operating area to the same setting (ratio K1 = ratio K2) even when the current is large.
  • Page 94 8.1.1.1. Operating principles Assuming that the current on the neutral side of the generator (inflow current) is I1 and the current on the output side of the generator (outflow current) is I2 as shown in Fig. 8-6, the differential current is calculated inside the Relay according to the following equation.
  • Page 95 (2) When the restraint method selection setting (Ires Meth.) is “MIN” ・ Ratio K1 determination ． ． × 100 (%) ≥ ratio K1 Smaller of |I1| and |I2| MIN(I1, I2) ・ Ratio K2 determination ． ． Smaller of |I1| and |I2| - Ratio switching point (Is Curt.) + (ratio K1) ×...
  • Page 96 If a large current passes through due to an external accident, an unbalanced differential current will flow due to the difference in the characteristic of the CT itself, the length of the secondary wiring, or the unbalance of loads. Therefore, when the current is large, increase the ratio to prevent the protection element from malfunctioning due to unbalanced differential current.
  • Page 97 8.2. Loss of field element A loss of field element is incorporated in CGP2-A41D1 to detect decline or loss of field due to the open or short of the field circuit of the generator. Apparatus Display name Protective function Loss of field element JEP0-IL9543...
  • Page 98 8.2.1. LOF element Fig. 8-9 shows the internal function blocks of LOF element. LOF element calculates the impedance from the line voltage (Vab) and the phase current (I1a, I1b) and compares it with the setting value (LOF ZF, LOF ZB). LOF element outputs a definitive signal after the preset time of the operation timer (Ope.
  • Page 99 8.2.1.1. Impedance during operation This section describes the impedance detected by the loss of field element at the time when the loss of field or the step-out occurs. ． : Generator voltage induced ． : Infinite bus bar voltage ． : Internal impedance of the generator ．...
  • Page 100 (a)When the loss-of-field occurs When the field is completely lost, the internal induced voltage (E ) of the generator finally becomes 0, and the impedance seen by the relay becomes ̇ = −�� ̇ �� … … … … … … … … … … … … … … … … … … … (5) ��...
  • Page 101 is the generator’s transient reactance jxd′ and Z Assuming that Z is the transformer reactance jxt, the equation (8) is expressed as follows. �� = −�� ����´ + �� ���� … … … … … … … … … … … … … … (9) ��...
  • Page 102 8.2.1.2. Operating principles The impedance must be calculated with the current and voltage in the same phase relationship. Since the line voltage Vab is used as the voltage for this element, the currents I1a and I1b are taken in to match the phase and they are calculated (I1a-I1b) internally to be used for impedance calculation.
  • Page 103 8.2.1.3. Examples of setting calculation This element is set as follows. Setting data: Generator’s rated capacity ......Rated voltage ..........Synchronous impedance (p.u. value) ... xd p.u. Transient impedance (p.u. value) ....xd´p.u. CT ratio and VT ratio From the above, the following are obtained: (Rated voltage) The generator's reference impedance: GZ= ×1000...
  • Page 104 Setting example Generator’s rated capacity ......kVA 112500 kVA Rated voltage ..........kV 11 kV Synchronous impedance (p.u. value) .... xd p.u. 2.66 p.u. Transient impedance (p.u. value) ....xd′p.u. 0.24 p.u. CT ratio 8000/5 A VT ratio 11000/110 V Generator’s reference impedance (Rated voltage) ×1000...
  • Page 105 8.3. Operation lock function An operation lock function is incorporated in CGP2-A41D1 and CGP2-A42D1. Apparatus Display name Protective function OPLOCK OPLOCK Operation lock function JEP0-IL9543...
  • Page 106 8.3.1. OPLOCK element OPLOCK element is provided with two DI circuits for interlocking the operation of protection elements. This element remains in the operation lock state while voltage is applied to DI6 or DI7, and the lock is reset without the voltage after a preset time of the resetting timer (Rst. Time) has passed. The protection elements subject to operation lock can be switched to one of the four patterns (OFF: Not used, DI6: Locked by DI6 input, DI7: Locked by DI7 input, DI67: Locked by either DI6 or DI7 input) depending on the lock element setting (○○...
  • Page 107 CB control function In the relay, following CB control function is provided. In this chapter, the CB control function incorporated in the relay are described. CB control can be performed in the following three ways. (1) Operation from the front panel (Refer to 5.3.4.2.) (2) Operation from a locally attached PC (PC-HMI) (3) Operation from the DI control instructions JEP0-IL9543...
  • Page 108 9.1. CB open control Fig. 9-1 shows the internal function blocks of CB open control. Table 9-1 shows the control conditions. The CB open control provides control output by receiving control instructions. To output the control signal, check the presence or absence of interlock condition and the presence or absence of operation block setting (CB OPEN), and then output the control instruction.
  • Page 109 Table 9-1 Control conditions of CB open CB control: Setting CB control: DI input CB open instruction (Refer to 5.3.4.2) Open CB State Interlock Open LOCAL/ instruction (Closed) condition Interlock CB OPEN instruction REMOTE (Panel or (DI:ch1) (DI:ch3) (DI:ch5) PC-HMI) ○...
  • Page 110 9.2. CB close control Fig. 9-2 shows the internal function blocks of CB close control. Table 9-2 shows the control conditions. The CB close control provides control output by receiving control instructions. To output the control signal, check the presence or absence of interlock condition and the presence or absence of operation block setting (CB CLOSE), and then output the control instruction.
  • Page 111 Table 9-2 Control conditions of CB close CB control: Setting CB control: DI input CB close instruction (Refer to 5.3.4.2) Close CB State Interlock Close LOCAL/ instruction (Closed) condition Interlock instruction CLOSE REMOTE (Panel or (DI:ch1) (DI:ch2) (DI:ch4) PC-HMI) UNUSE UNBLK Possible ○...
  • Page 112 Standard (Technical data) Compliance standards: Standard of the Japanese Electrotechnical Committee (JEC) JEC2500 (2010) Protection relays for electric power systems JEC2501 (2010) Electromagnetic compatibility tests for protection relays JEC2515 (2005) Percentage differential relays for electric power apparatus protection Guaranteed performance Common conditions Frequency: Rated frequency Unless otherwise indicated, the Control power supply voltage: Rated voltage...
  • Page 113 Operating Current ratio differential Setting: (a) Within 50 ms time element (87G) Minimum operating current = 0.4 A (b) Ope.time setting ± 50 ms Ratio switching point = Minimum (c) Ope.time setting ± 5% Restraint current method: All methods Input: Input to one terminal Current = 0 →...
  • Page 114 Phase Loss of field element (40) Setting: Within ±5% of the theoretical characteris ZF, ZB = Minimum value of operation at the tics Operating time = Minimum characteristic control point Input: Current = Rated current × 2 (10 A) (As follows: I1a = 5A, I1b = 5A, I1a-I1b = 10 Characteristic control point: Points where the current lags behind the voltage by 250°...
  • Page 115 Maximum Current ratio differential The relay shall operate. Input current : 100A, for 300 ms, twice, at current in element (87G) intervals of 1 min guaranteed operating range (Internal fault) Maximum Current ratio differential The relay shall not operate. Input: Through current = 25A current in element (87G) (300ms, 10th)
  • Page 116 10.2. General specification data Item Test condition Standard DC 110 V : 15 A Closed circuit capacity DC 220 V : 10 A 0.5s L/R = 0 Contact for tripping DC 110 V : 0.3 A Open-circuit capacity DC 220 V : 0.15 A L/R = 40 ms Open- / Closed circuit Contact capacity...
  • Page 117 Item Test condition Standard No malfunction,  Turning on/off control power supply Trouble of control no unnecessary operation,  Instantaneous interruption of control power supply power supply no abnormal indication,  Slow variation of control power supply and etc. No malfunction, 8 kV: Contact discharge Immunity against no unnecessary operation,...
  • Page 118 Item Test condition Standard Applied time : 1.2/50 μs at open circuit condition 8/20 μs at short circuit condition Effective output impedance : 2 Ω 5 times of each of positive and negative pole at intervals 1min Port for applied and applied voltage: ...
  • Page 119 Item Test condition Standard Amplitude Time Acceleration (mm) (m/s Frequency Back Right Back Right (Hz) No malfunction, Each direction no unnecessary operation, forth left down forth left down Vibration no abnormal indication, and etc. 16.7  Shock acceleration : 300 m/s No malfunction, ...
  • Page 120 Test Although all necessary functional tests are implemented for this relay before shipment from the factory, it is recommendable to perform the tests with reference to the following items, before use. 11.1. Visual inspection Perform the visual inspection check with reference to the following items. Inspection item Contents of inspection (1) No deformation...
  • Page 121 11.2. Characteristic test 11.2.1. Notes related to the tests (1) Recommended test condition Regarding the ambient conditions, following conditions shall be complied with, as far as possible. If the test is performed at the condition which is significantly different from the next condition, the correct test results may not be obtained.
  • Page 122 11.2.2. Characteristic test (1) Test circuit The external connection of AC input circuit is as shown below as a reference. Refer to Fig. 2-3 for the terminal arrangement. Current ratio differential element ■ Minimum operating current test ■ Operating/Resetting time test Example of a-phase A-01 「...
  • Page 123 Loss of field element A-15 Ｖ ～ Voltage ～ 「 A-16 Phase meter A-01 Ａ ～ 「 ～ A-02 Current A-03 A-04 CGP2-A41D1 Current value measured by this test circuit is represented by I. 2×I Calculate Z (Ω) using the above equation. Note: 2×I = (I1a-I1b) I = Input current Operation lock function...
  • Page 124 (2) Test items [1] Test setting Before staring test, it is recommended to to use ‘Test setting’ function in order to lock the operation of un-tested phases and elements. As for the method of test setting, refer to 5.3.4.4.2 in Chapter 5. As for the list of test setting items, refer to the table shown below.
  • Page 125 (Supplement) How to find the characteristic control point for the Loss of field element : Operating measured value at θ = 90° (ohm) : Operating measured value at θ = 90° (ohm) L: Theoretical value of operation at θ = 60° and 120° for the above Z and Z values...
  • Page 126 Maintenance and self diagnosis 12.1. Maintenance 12.1.1. Daily inspection It is recommended to check the following items daily; • No dust (such as iron powder, etc) is in/on the relay case • No abnormal noise is generated • ‘RUN’ LED is lighting 12.1.2.
  • Page 127 12.2. Self diagnosis Monitoring of the electronic circuit as well as the incorporated power supply is performed. If any trouble is generated, fault display by LED and output by alarm DO (b contact) are executed. 1. Alarm indication The relay alarm, which would be appeared at relay failure, is divided two types, minor failure and serious failure.
  • Page 128 RUN LED ALARM LED Fig. 12-1 Position of RUN LED, ALARM LED JEP0-IL9543...
  • Page 129 DO 9 DO 9 DO 9 is b contact (for alarm) Fig. 12-2 Position of alarm DO JEP0-IL9543...
  • Page 130 Default setting or configuration value 13.1. Setting • CGP2-A41D1 Setting Category Element Item name or Setting parameter Range Default value Please make a note about setting. Step PC-HMI PC-HMI PC-HMI Group 1 (G1) Group 2 (G2) DIFF DIFF － DIFF EN DIFF EN OFF　ON Off　On...
  • Page 131 • CGP2-A42D1 Setting Category Element Item name or Setting parameter Range Default value Please make a note about setting. Step PC-HMI PC-HMI PC-HMI Group 1 (G1) Group 2 (G2) DIFF DIFF － DIFF EN DIFF EN OFF　ON Off　On MAX MIN SUM －...
  • Page 132 13.2. Output contacts • CGP2-A41D1 Default value Please make a note Item name (PC-HMI) (PLC signal) about setting. CB control CB status Condition Interlock of CB close (DI) Interlock of CB open CB close CB open Operation lock (DI) Contacts ALLEL-O for tripping ALLEL-O...
  • Page 133 HEAD OFFICE : 7-3, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO, 100-8310, JAPAN First edition: Oct. 2019...

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