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Mitsubishi Electric MELPRO S Series Operation Manual

Numerical relay
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Numerical Relay
TM
MELPRO
-S
Series
MODEL
CBV2 - A02S1
COC4 - A02S1
OPERATION MANUAL
1 / 47
JEP0-IL9537
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Summary of Contents for Mitsubishi Electric MELPRO S Series

  • Page 1 Numerical Relay MELPRO Series MODEL CBV2 - A02S1 COC4 - A02S1 OPERATION MANUAL 1 / 47 JEP0-IL9537...
  • 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 [Installation, wiring work] Danger The equipment must be correctly grounded using the designated grounding terminals where they exist. Failure to do so may lead to the risk of electric shock, equipment failure, malfunction or failure to operate. Be sure to return all terminal covers, protection covers to their original positions once any work is complete.
  • 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 Onerous repair term after discontinuation of product (1) MITSUBISHI ELECTRIC CORPORATION shall accept onerous product repairs for 7 (seven) years after production of the product is discontinued. (However, please consider the replacement of products after 15 years have been passed from ex-work of products.) (2)Product supply (including repair parts) is not available after production is discontinued.
  • Page 7 - Introduction - – S 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

    - Table of contents - 1. Features ............................ 9 2. Relay Specification ......................... 10 2.1. General specification (CBV2-A02S1) ................. 10 2.2. General specification (COC4-A02S1) ................11 3. Selection Items ........................13 3.1. Rotary Switch Assign ......................13 3.2. Switch-1: Select Item Switch ..................... 14 3.3.

  • Page 9: Features

    1. Features Flexible and reliable protection functions  Fine setting step of protection elements enables flexible use for various applications.  16 kinds of operation time characteristics and wide setting range of time multiplier is available for overcurrent protection element. ...

  • Page 10: Relay Specification

    2. Relay Specification In this section, the relay specification such as the rating and relay element is explained. 2.1. General specification (CBV2-A02S1) Table 2-1 General specification (CBV2-A02S1) Name Over/Undervoltage Relay Relay Model CBV2-A02S1 Style 563PQB Undervoltage element (27) Elements Protection Overvoltage (59) Frequency 50Hz / 60Hz (selectable)

  • Page 11: General Specification (Coc4-A02S1)

    2.2. General specification (COC4-A02S1) Table 2-2 General specification (COC4-A02S1) Name Overcurrent Relay Relay Model COC4-A02S1 Style 562PQB IDMT overcurrent (51) Instantaneous overcurrent (50) Elements Protection IDMT ground overcurrent (51N) Instantaneous ground overcurrent (50N) Frequency 50Hz / 60Hz (selectable) Voltage AC5A AC100V –...
  • Page 12 Name Overcurrent Relay Relay Model COC4-A02S1 Style 562PQB 10 VA (cos  = 0.4) For control and Make: alarm 10 W (L/R = 0.007 s) Case/Cover Color : N1.5 Mass approx. 1.2kg *1: When DC125V is used, please note that the maximum voltage of operation range is still 143V. (A maximum is not 125V x 30%.) *2: If it sets to LOCK, the protection element will be in a lock state of operation.

  • Page 13: Selection Items

    3. Selection Items 3.1. Rotary Switch Assign On this protection relay, four (4) rotary switch is mounted. The switch name and position is shown in Fig. 3-1 and Fig. 3-2. When each rotary switch set no assigned position, the 7-seg. LED is turned off. Switch-1 (SW1) Switch-2...

  • Page 14: Switch-1: Select Item Switch

    3.2. Switch-1: Select Item Switch There is “Select Item Switch” which is assigned by following tables. The “Protectable items by password” column means that the password input is required for operating if password function is activated. Table 3-1 Select items of Switch-1 (CBV2) Rotary Protectable Related...

  • Page 15: Switch-2: Measurement Item Switch

    3.3. Switch-2: Measurement Item Switch There is “Measurement Item Switch” which is assigned by following tables. By this rotary switch, the value or condition of selected phase are displayed. Table 3-3 Measurement items of Switch-2 (CBV2) Rotary position CBV2-A02S1 Description Related chapters of Switch-2 Clause 4.1, 4.2, 4.3...

  • Page 16: Switch-3: Setting Item Switch

    3.4. Switch-3: Setting Item Switch There is “Setting Item Switch” which is assigned by following tables. These values are enabled when Switch-1 is set “DISP. (SET.)” or “SETTING”. Table 3-5 Setting Item of Switch-3 (CBV2) Rotary position Related CBV2-A02S1 Description of Switch-3 chapters U<...

  • Page 17: Front Panel Operation

    4. Front Panel Operation 4.1. Real-Time Measurement [MEASURE] The real-time measurement value such as voltage value or current value is shown by “MEASURE” function. In this measured value, the harmonic elements are eliminated by the protection relay’s filters. The different value would be appeared between this measured value from protection relay and an electrical indicators (e.g.

  • Page 18: Fault Record - Measurement Value [Record (Rms)]

    4.2. Fault Record – Measurement Value [RECORD (RMS)] The measurement value when the relay element was operating is shown by “RECORD (RMS)” function. This protection relay can store ten (10) fault phenomena. The saved fault phenomena are displayed with rotating in order. The indicating period of one phenomenon is 1 second. The measured value which the phase is selected by Switch-2 is displayed.
  • Page 19 Measured value when the relay element was operation is indicated on 7-seg LED. Indicate value according to position of Switch-2. Next, the figure two (2) which means 2 latest phenomenon is indicated. Measured value when the relay element was operation is indicated on 7-seg LED.
  • Page 20 Next, the figure three (3) which means 3 phenomenon is indicated. Even when you are turning Switch-2, the displaying phenomenon goes to next order. In this case, V of 3 phenomenon is indicated. After the indicating the oldest phenomenon in the save data, it goes back to latest (1 phenomenon.

  • Page 21: Fault Record - Relay Element [Record (Ele.)]

    4.3. Fault Record – Relay Element [RECORD (ELE.)] The lighting operation indicator when the relay element was operation (trip) can be read out by “RECORD (ELE.)” function. This protection relay can store ten (10) fault phenomenon. The saved fault phenomenon are displayed with rotating in order.
  • Page 22 Next, the figure two (2) which means 2 latest phenomenon is indicated. The condition when relay elements were operated (tripped) is displayed on the operation indicator. Next, the figure three (3) which means 3 latest phenomenon is indicated. The condition when relay elements were operated (tripped) is displayed on the operation indicator.
  • Page 23 After the indicating the oldest phenomenon in the save data, it goes back to latest (1 phenomenon.  Before checking fault records of operated relay element, please push “INDICATOR RESET” button and turn off LEDs. If current LED remains glowing, the LED indication of fault records is glowed with overwrapping. Because of this, it would be difficult to distinguish the indication of fault records and the indication of current condition.

  • Page 24: Relay Element Detection Before Trip [Pick Up]

    4.4. Relay Element Detection before Trip [PICK UP] The count up status of the relay element is indicated by “PICK UP” function. This count up status means 2 conditions.  First, it shows the condition from the detection to tripping. ...
  • Page 25 The count up condition is continued until reaching 10. When this count up reaches to 10, the protection relay trips and digital output (DO) is closed and 7-seg LED indicates “U”. The blink of LED is stopped. 25 / 47 JEP0-IL9537...

  • Page 26: Display Relay Element Setting [Disp. (Set.)]

    4.5. Display Relay Element Setting [DISP. (SET.)] The current setting of the relay element can be read out by “DISP. (SET.)”. By turning Switch-3, each setting value can be read out. Even though the Switch-3 set to “PASSWORD” (position 15), the current password does not be indicated. Turn Switch-1 to “DISP (SET.)”...

  • Page 27: Change Relay Element Setting [Setting]

    4.6. Change Relay Element Setting [SETTING] The new setting of the relay element can be changed by “SETTING” function. Set position 7 (Setting) When the password is set, input the password to enter the setting mode. Go to clause 4.6.1. When the password isn’t set, go to clause 4.6.2 ~ 4.6.8.
  • Page 28 The blinking LED shows the operated digit. You can change the figure using Switch-4. After no operation for 2 seconds, blinking digit is moved to right. No operation for 2 seconds, blinking digit is moved to right. Turn Switch-4 to input the password.
  • Page 29 If Correct Password Inputted password is indicated. As an example, it is show that correct password is “205”. When inputted password is correct, the setting value linked in Switch-3 position is indicated. Go to sub-clause 4.6.2 ~ 4.6.8. If Wrong Password Inputted password is indicated.

  • Page 30: Set Numerical Values

    4.6.2. Set Numerical Values The setting value linked in Switch-3 position is indicated. The indicated data is current setting value. After showing current setting value, all LEDs are blinking. You can select new value using Switch-4. Under blinking condition, you can select a setting value.

  • Page 31: Set Uv-Test Mode (For Cbv2)

    4.6.3. Set UV-TEST Mode (for CBV2) The UV-TEST is use for the relay characteristic test. In the CBV2, under/overvoltage elements are tripped when one of the phases is operated. In other words, under/overvoltage elements operate as an OR sequence of AB-phase, BC-phase and CA-phase. However this OR sequence interferes with a testing for the relay characteristic.

  • Page 32: Set Idmt Characteristic Curve (For Coc4)

    4.6.4. Set IDMT Characteristic Curve (for COC4) In the COC4-A02S1, IDMT curves can be select from 16 types. Please refer to clause 2.2. In front LED, quantified value are indicated. The correspondence table between LED indication number and curve characteristic are shown in Table 4-2. The equations of IDMT characteristic are shown in equation (4-1) to (4-3).

  • Page 33: Set Freq

    4.6.5. Set FREQ. There is FREQ. setting for the selecting 50 Hz or 60 Hz. Check setting power system frequency before in-service condition. Turn Switch-3 to FREQ. (position 10). The current setting value is indicated. This example shows 50Hz as a setting value.

  • Page 34: Set Alarm Hold

    4.6.6. Set ALARM HOLD There is ALARM HOLD setting for the self-diagnosis function. When the self-diagnosis function detects some error, the protection relay goes to error condition. The behavior under the error condition is shown in Table 4-3. In case of ALARM HOLD = OFF, the protection relay try to recover. However the behavior of the Error condition is continued when the error cannot cleared.

  • Page 35: Set Comm. St. No

    4.6.7. Set COMM. ST. No. There is COMM. ST. No. setting for the setting the slave address in MODBUS. More details please refer to “MELPRO-S series MODBUS Communication Instruction Manual”. Turn Switch-3 to COM. ST. No. (position 13). The current setting value is indicated.

  • Page 36: Set Password

    4.6.8. Set PASSWORD There is PASSWORD function for the changing password. If password is set “000”, the password function is disable. Default password is “000” (= disable). After setting password, the entering password is needed for some items. More details, please refer to section 3.2.
  • Page 37 Turn Switch-4 to change the password. After no operation for 2 seconds, blinking digit is moved to right. After no operation for 5 seconds, blinking digit is moved to right. Turn Switch-4 to change the password. 37 / 47 JEP0-IL9537...
  • Page 38 After no operation for 2 seconds, blinking is stopped. These indicated values are saved as new password. 38 / 47 JEP0-IL9537...

  • Page 39: Forced Operation For Trip Digital Output [Forced Op. (Trip)]

    4.7. Forced Operation for Trip Digital Output [FORCED OP. (TRIP)] The “FORCED OP. (TRIP)” function offers operating a digital output of the trip contact. If password function is enabled, please refer to clause 4.6.1. Following operation steps shows the condition after inputting correct password.
  • Page 40 Ｅ Earth circuit ＋ Auxiliary power supply RS485 NETP RS485 NETSG RS485 NXTN ALARM contact ALARM contact The functions of these terminals are dependent on each protection device. Trip contact Trip contact The functions of these Trip contact closes. terminals are dependent on (Terminal no.

  • Page 41: Forced Operation For Relay Element [Forced Op.＊]

    4.8. Forced Operation for Relay Element [FORCED OP.＊] The “FORCED OP. (*)” function offers operating a digital output of each relay element. The asterisk suggests each relay elements depending on the relay model. This forces operation for the relay element function is assigned position 9 to 11 in Switch-1. More details, please refer to clause 3.2.
  • Page 42 Push “PORCED OPERATION” button. Ｅ ＋ Earth circuit Auxiliary power supply RS485 NETP RS485 NETSG RS485 NXTN ALARM contact ALARM contact The functions of these terminals are dependent on each protection device. Trip contact Trip contact The contact close (the operated terminal The functions of these terminals are dependent on...

  • Page 43: Clear Fault Record Data [Record Reset]

    4.9. Clear Fault Record Data [RECORD RESET] By the “RECORD RESET”, all record data (such as operated elements, fault measured values) are deleted. The records are deleted 3 seconds after the Switch-1 set this position. If password function is enabled, please refer to clause 4.6.1. Following operation steps shows the condition after inputting correct password.

  • Page 44: Display Error Code By Self-Diagnosis [Disp. Err.code]

    4.10. Display Error Code by Self-Diagnosis [DISP. ERR.CODE] When the self-diagnosis function detects something to error, the error code relating a cause are saved. More detail of the error code, please refer to instruction manual of each the relay model. If the protection relay has no error, nothing is displayed.

  • Page 45: Clear Error Code [Err. Code. Reset]

    4.11. Clear Error Code [ERR. CODE. RESET] By the “ERR. CODE. RESET”, the saved error code (refer to clause 4.10) are deleted. The records are deleted 3 seconds after the Switch-1 set this position. If password function is enabled, please refer to clause 4.6.1. Following operation steps shows the condition after inputting correct password.
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  • Page 48 HEAD OFFICE: 7-3 MARUNOUCHI 2-CHOME, CHIYODA-KU TOKYO, 100-8310, JAPAN Revised in Jan. 2019 48 / 48 JEP0-IL9536...

This manual is also suitable for:

Melpro cbv2 -a02s1Melpro coc4 -a02s1

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