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JEP0-IL9537
Numerical Relay
MELPRO
MODEL
-S Series
CBV2 - A02S1
COC4 - A02S1
OPERATION MANUAL
TM
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JEP0-IL9537
The case where a dangerous situation can arise and there is the possibility that death or
seriously injury can occur if the equipment is handled incorrectly.
The case where a dangerous situation can arise and there is the possibility that moderate
or minor injuries canl occur, or property damage can take place if the equipment is handled
incorrectly.
Danger
Caution
Caution
●Transport the equipment in the correct orientation.
●Do not apply excessive shock and/or vibration as this could affect the performance and life of the
product.
Caution
The storage environment shall comply with the following conditions. Otherwise, there is a risk of reducing
the performance and life of the product.
- Ambient temperature -25 to +70°C
The state where dew condensation or freezing does not occur.
• Frequency variation Within ±5% of the rated frequency
- Altitude 2000 m or lower
- The equipment must not be exposed to abnormal vibration, shock, inclination, or magnetic fields.
- The equipment must not be exposed to harmful smoke/gas, saline gas, water droplets or
vapour, excessive dust or fine powder, explosive gas or fine powder, wind & rain.
- 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.
Safety precautions are classified as “Danger” and “Caution.”
Furthermore, even with items described as Caution, there is the possibility of serious consequences
depending on the situation. All of the described contents are important. Therefore, be sure to comply with
them.
[Transportation]
[Storage]
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JEP0-IL9537
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. If they remain uncovered there is a risk of electrical shock.
Caution
Ensure that the equipment is mounted and connected correctly. Otherwise, there are risks of failure,
burning, or mal-operation.
Securely tighten the terminal connection screws. Otherwise, there are risks of failure and burning.
Ensure that the equipment is connected correctly in accordance with the details shown on the
connection terminals. Otherwise, there is the risk of failure, burning, malfunction, or maloperation.
Ensure that the equipment is connected correctly in accordance with the phase sequence details shown
on the connection terminals. Otherwise, there is the risk of failure, burning, malfunction, or maloperation.
All power supplies to the equipment must be of suitable capacity and rated load to avoid the risk of
malfunction and maloperation.
The appropriate connectors must be used to ensure compatibility with the connector terminals to avoid
the risks of failure or fire.
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. Otherwise, there is the risk of electric shock, injury, failure,
malfunction, or maloperation.
Caution
The equipment must be used within the following range limits. Otherwise, there is a risk of reducing the
performance and life of the product.
• Variation range of control power supply voltage Within –15% to +10% of the rated voltage
• Frequency variation Within ±5% of the rated frequency
• Ambient temperature -10 to +55°C
(-10 to 50°C is allowable temporarily within
few hours a day, but use under the state
where dew condensation or freezing does
not occur.)
• Altitude 2000 m or lower
• The state where abnormal vibration, shock, inclination, magnetic field are not applied
• The state where it is not exposed to harmful smoke/gas, saline gas, water droplet or vapor,
excessive dust or fine powder, explosive gas or fine powder, wind & rain.
While energized, do not tamper with or remove any components other than those which have been
designated. Otherwise, there is a risk of failure, malfunction, or maloperation.
When changing the setting value during the energized state, ensure that all trip circuits are locked in
order not to operate. Otherwise, there is a risk of malfunction.
[Installation, wiring work]
[Operating and Setting the equipment]
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JEP0-IL9537
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. Otherwise, there is the risk of electric shock, injury, failure,
malfunction, or maloperation.
Do not touch any live parts, such as terminals, etc. Otherwise, there is a risk of electric shock.
Caution
When replacing the equipment, use a product of same model, rating, and specifications.
Otherwise, there is the risk of failure or fire. If any other product is to be used, the manufacturer must be
consulted.
We recommend that any tests or inspections are carried out under the following conditions, as well as
any additional conditions described in the instruction manual.
• Ambient temperature
20 ± 10°C
• Relative humidity
90% or less
• External magnetic field
80 A/m or less
• Atmospheric pressure
86 to 106 × 103 Pa
• Mounting angle
Regular direction ±2°
• Frequency
Rated frequency ±1%
• Waveform (in the case of AC)
Distortion factor 2% or less
Distortion
factor=
Effective value of higher harmonics only
× 100 (%)
Effective value of fundamental wave
• AC component (in the case of DC)
Ripple factor 3% or less
Ripple
factor =
Max. value – Min. value
× 100 (%)
Average value of DC
• Control power supply voltage
Rated voltage ±2%
Do not exceed the overload capacity for voltage and current. Otherwise,equipment failure or fire could
occur.
Do not clean the equipment while energised. When the cover needs to be cleaned, make use of a damp
cloth.
Caution
When carrying out repair and/or modification, please consult with the manufacturer in advance.of
carrying out the work. We will not take any responsibility for any repair and/or modification (including
software) which has been carried out without prior consent.
Caution
Disposal must take place in accordance with the applicable legislation
[Maintenance and Inspection]
[Repair and modification]
[Disposal]
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JEP0-IL9537
- Guarantee -
1. Guarantee period
The guarantee period of this product should be one year after delivery, unless otherwise specified by both
parties.
2. Scope of guarantee
When any fault or defect is detected during the period of guarantee and such fault or defect is proved to be
caused apparently at the responsibility of MITSUBISHI ELECTRIC CORPORATION, the defective unit
concerned will be repaired or replaced with substitute with free of charge.
However, the fee for our engineer dispatching to site has to be covered by the user.
Also, site retesting or trial operation caused along with replacing the defect units should be out of scope of
our responsibilities.
It is to be acknowledged that the following faults and defects should be out of this guarantee.
(1) When the faults or defects are resulted from the use of the equipment at the range exceeding the
condition/environment requirements stated in the catalogue and manual.
(2) When the faults or defects are resulted from the reason concerning without our products.
(3) When the faults or defects are resulted from the modification or repair carried out by any other entity than
MITSUBISHI ELECTRIC CORPORATION.
(4) When the faults or defects are resulted from a phenomenon which cannot be predicted with the science
and technology put into practical use at the time of purchase or contract
(5) In case of integrating our products into your equipment, when damages can be hedged by the proper
function or structure in the possession of your equipment which should be completed according to the
concept of the de fact standard of industry.
(6) In case of that the faults or defects are resulted from un-proper application being out of instruction of
MITSUBISHI ELECTRIC CORPORATION.
(7) In case that the faults or defects are resulted from force majeure such a fire or abnormal voltage and as
an act of God such as natural calamity or disaster.
3. Exclusion of loss in opportunity and secondary loss from warranty liability
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
CORPORATION products, special damages and secondary damages whether foreseeable or not,
compensation for accidents, and compensation for damages to products other than MITSUBISHI ELECTRIC
CORPORATION products and other tasks.
4. Applications of products
(1) The user is requested to confirm the standards, the regulations and the restrictions which should be
applied, in case of utilizing products described in this catalogue and another one in combination.
Also, the user is requested to confirm the suitability of our products to your applied system or equipment or
apparatus by yourself.
MITSUBISHI ELECTRIC CORPORATION shall not be liable for any suitability of our products to your
utilization.
(2) This MITSUBISHI ELECTRIC CORPORATION products described in the catalogue have been designed
and manufactured for application in general industries, etc. Thus, application in which the life or an asset
could be affected by special application such as medical system for life-sustaining, in nuclear power plants,
power plants, aerospace, transportation devices(automobile, train, ship, etc.) shall be excluded from the
application. In addition to above, application in which the life or an asset could be affected by potentially
chemical contamination or electrical interference and also in which the circumstances and condition are not
mentioned in this catalogue shall be excluded from the application.
Note even if the user wants to use for these applications with user’s responsibility, the user to be requested
to approve the specification of MITSUBISHI ELECTRIC CORPORATION products and to contact to the
technical section of 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.
(3) In using MITSUBISHI ELECTRIC CORPORATION product, the working conditions shall be that the
application will not lead to a major accident even if any problem or fault occur, and that backup or duplicate
system built in externally which should be decided depend on the importance of facility, is recommended.
(4) The application examples given in this catalogue are reference only and you are requested to confirm
function and precaution for equipment and apparatus and then, use our products.
(5) The user is requested to understand and to respect completely all warning and caution items so that
unexpected damages of the user or the third party arising out of un-correct application of our products would
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JEP0-IL9537
not be resulted.
5. 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.
6. Changes in product specification
The specification given in the catalogue, manuals or technical documents are subject to change without prior
to notice.
7. Scope of service
The technical service fee such as engineer dispatching fee is excluded in the price of our products.
Please contact to our agents if you have such a requirement.
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JEP0-IL9537
- Introduction -
Thank for your purchasing MITSUBISHI ELECTRIC MELPROTM – S Series Digital Protection Relay.
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.
This “OPERATION MANUAL” explains front panel operation (human machine interface, HMI) and how to use it.
The MELPRO-S series main function –such as protection function overview, operation method– should be read
each relay device instruction manual.
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JEP0-IL9537
- 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. Switch-2: Measurement Item Switch .................................................................................. 15
3.4. Switch-3: Setting Item Switch ............................................................................................ 16
4. Front Panel Operation ............................................................................................................ 17
4.1. Real-Time Measurement [MEASURE] ............................................................................... 17
4.2. Fault Record – Measurement Value [RECORD (RMS)] ..................................................... 18
4.3. Fault Record – Relay Element [RECORD (ELE.)] .............................................................. 21
4.4. Relay Element Detection before Trip [PICK UP] ................................................................ 24
4.5. Display Relay Element Setting [DISP. (SET.)] .................................................................... 26
4.6. Change Relay Element Setting [SETTING] ....................................................................... 27
4.6.1. Under Protection by Password ................................................................................................... 27
4.6.2. Set Numerical Values .................................................................................................................. 30
4.6.3. Set UV-TEST Mode (for CBV2) .................................................................................................. 31
4.6.4. Set IDMT Characteristic Curve (for COC4) ................................................................................ 32
4.6.5. Set FREQ. ................................................................................................................................... 33
4.6.6. Set ALARM HOLD ...................................................................................................................... 34
4.6.7. Set COMM. ST. No. .................................................................................................................... 35
4.6.8. Set PASSWORD ......................................................................................................................... 36
4.7. Forced Operation for Trip Digital Output [FORCED OP. (TRIP)] ........................................ 39
4.8. Forced Operation for Relay Element [FORCED OP.＊] ..................................................... 41
4.9. Clear Fault Record Data [RECORD RESET] ..................................................................... 43
4.10. Display Error Code by Self-Diagnosis [DISP. ERR.CODE] ................................................ 44
4.11. Clear Error Code [ERR. CODE. RESET] ........................................................................... 45
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JEP0-IL9537
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.
Fault record function (10 records at a maximum) is provided for fault analysis.
Modbus interface using RS-485 is provided for remote communication.
Password-protected human-machine interface enables secured operation.
Highly Accurate Digital Computation
The digital computation using high-speed sampling minimizes the effect of harmonics, etc., and provides
highly accurate protection.
Self-diagnosis
The continuously monitoring of electronic circuits from input to output can detect internal failure before the
failure causes damage on the power system.
Compact size
The compact relay designed for space-saving is suitable for replacement of existing ones.
Energy saving
Low power consumption of the relay is effective in miniaturization of CT and VT as well as energy saving.
Fig. 1-1 Front view of MELPRO-S Series
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JEP0-IL9537
Name
Over/Undervoltage Relay
Relay Model
CBV2-A02S1
Style
563PQB
Elements
Protection
Undervoltage element (27)
Overvoltage (59)
Rating
Frequency
50Hz / 60Hz (selectable)
Voltage
AC110V
Aux. power
supply
Voltage
AC100V – 110 V
DC100V – 125 V *1
Operative range
AC: 85–126.5 V
DC: 85-143 V *1
Setting
Undervoltage
element
Operation value
LOCK – 60~120 V (1 V step) *2
Operation time
INST - 0.1~ 5.0 s (0.1 s step)
TEST MODE
OFF – AB – BC – CA
Overvoltage
element
Operation value
LOCK – 120~165 V (1 V step) *2
Operation time
INST - 0.1~ 5.0 s (0.1 s step)
Forced
operation
Trip and control (annunciator) contacts can be forced to operate.
Operation
indication
Operation indicator LED comes on when the relay element operates.
LED indication: Undervoltage element, Overvoltage element, AB-Phase, BC-Phase, CA-Phase
Display
RUN LED (green)
Indicate the result of automatic self-diagnosis. This LED is turned
on for normal and turned off for abnormal.
ALARM LED (red)
Indicate the result of automatic self-diagnosis. This LED is turned
off for normal and turned on for abnormal.
Self-diagnosis
(ALARM)
An electronic circuit and a built-in power supply are always supervised, and it outputs to the
RUN/ALARM LED and an ALARM contact.
Burden
Phase Circuit
0.5 VA or less (with rated current)
Auxiliary supply
For 110 VDC: approx. 1.6W
For 110 VAC: approx. 1.9VA
Output Contact
Configuration
For trip
Normally open contact
For control
Normally open contact (for 27 and 59)
For alarm
Normally close contact
Capacity
For trip
Make: 110 VDC, 15 A, 0.5 s (L/R=0 s)
220 VDC, 10 A, 0.5 s (L/R=0 s)
Brake: 110 VDC, 0.3 A (L/R≦40 ms)
220 VDC, 0.15 A (L/R≦40 ms)
Continuation: 1.5 A
For control and
alarm
Make: 10 VA (cos = 0.4)
10 W (L/R = 0.007 s)
Case/Cover
Color: N1.5
Mass
approx. 1.2 kg
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)
*1: When DC125 V is used, please note that the maximum voltage of operation range is still 143V.
(A maximum is not 125 V x 30 %.)
*2: If it sets to LOCK, the protection element will be in a lock state of operation.
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Name
Overcurrent Relay
Relay Model
COC4-A02S1
Style
562PQB
Elements
Protection
IDMT overcurrent (51)
Instantaneous overcurrent (50)
IDMT ground overcurrent (51N)
Instantaneous ground overcurrent (50N)
Rating
Frequency
50Hz / 60Hz (selectable)
Voltage
AC5A
Aux. power
supply
Voltage
AC100V – 110V
DC100V – 125V *1
Operative range
AC: 85–126.5 V
DC: 85-143 V *1
Setting
IDMT-OC
(51)
Operation value
LOCK – 1.0 ~ 12.0 A (0.1 A step) *2
Time Multiplier
0.25 – 0.5 ~ 50.0 (0.5 step)
IDMT curve
NI01-VI01-EI01-LI01-DT01-DT(Inst.) -NI11-EI11
-EI12-NI21-VI21-LI21-MI31-NI31-VI31-EI31
* DT(Inst.): less than or equal to 50 ms
* In front LED, quantified value are indicated.
Inst.-OC (50)
Operation value
LOCK – 10.0 ~ 80.0 A (0.5 A step) *2
Operation time
INST (less than or equal to 40 ms)
Ground IDMT
OC (51N)
Operation value
LOCK – 0.25 ~ 4.00 A (0.05 A step) *2
Time Multiplier
0.25 – 0.5 ~ 50.0 (0.5 step)
IDMT curve
NI01-VI01-EI01-LI01-DT01-DT(Inst.) -NI11-EI11
-EI12-NI21-VI21-LI21-MI31-NI31-VI31-EI31
* DT(Inst.): less than or equal to 50 ms
Ground inst.
OC (50N)
Operation value
LOCK – 2.0 ~ 20.0 A (0.5 A step) *2
Operation time
INST (less than or equal to 40 ms)
Forced
operation
Trip and control (annunciator) contacts can be forced to operate.
Operation
indication
Operation indicator LED comes on when the relay element operates.
LED indication: A-Phase, B-Phase, C-Phase, Zero-sequence, Instantaneous overcurrent element.
Display
RUN LED (green)
Indicate the result of automatic self-diagnosis. This LED is turned
on for normal and turned off for abnormal.
ALARM LED (red)
Indicate the result of automatic self-diagnosis. This LED is turned
off for normal and turned on for abnormal.
Self-diagnosis
(ALARM)
An electronic circuit and a built-in power supply are always supervised, and it outputs to the
RUN/ALARM LED and an ALARM contact.
Burden
Voltage Circuit
0.5VA or less (with 110VAC)
1.0VA or less (with 220VAC)
Auxiliary supply
For 110VDC : approx. 1.6W
For 110VAC : approx. 1.9VA
Output Contact
Configuration
For trip
Normally open contact
For control
Normally open contact (for IDMT-OC, Inst.-OC and Ground-OC)
For alarm
Normally close contact
Capacity
For trip
Make: 110 VDC, 15 A, 0.5 s (L/R=0 s)
220 VDC, 10 A, 0.5 s (L/R=0 s)
Break: 110 VDC, 0.3 A (L/R≦40 ms)
220 VDC, 0.15 A (L/R≦40 ms)
Continuation: 1.5 A
2.2. General specification (COC4-A02S1)
Table 2-2 General specification (COC4-A02S1)
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JEP0-IL9537
Name
Overcurrent Relay
Relay Model
COC4-A02S1
Style
562PQB
For control and
alarm
Make: 10 VA (cos = 0.4)
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.
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Switch-1
(SW1)
Switch-2
(SW2)
Switch-3
(SW3)
Switch-4
(SW4)
1
2
3
5
4
9
13
16
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.
Fig. 3-1 Rotary switch assign (switch 1 ~ 4)
Fig. 3-2 Rotary switch position (number 1 ~ 16 are clockwise)
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JEP0-IL9537
Rotary
position
of Switch-1
CBV2-A02S1
Description
Related
chapters
Protectable
items by
password
1
MEASURE
Real-Time Measurement
Clause 4.1
− 2 RECORD(RMS)
Fault Record – Measurement Value
Clause 4.2
− 3 RECORD (ELE.)
Fault Record – Relay Element
Clause 4.3
− 4 PICK UP
Relay Element Detection before Trip
Clause 4.4
− 5 DISP. (SET.)
Display Relay Element Setting
Clause 4.5
−
6
−
No assigned
7
SETTING
Change Relay Element Setting
Clause 4.6
○
8
FORCED OP.(TRIP)
Forced Operation for Trip Digital
Output
Clause 4.7
○
9
FORCED OP.(U<)
Forced Operation for Relay Element
(Undervoltage)
Clause 4.8
○
10
FORCED OP.(U>)
Forced Operation for Relay Element
(Overvoltage)
Clause 4.8
○
11
−
No assigned
12
−
No assigned
13
RECORD RESET
Clear Fault Record Data
Clause 4.9
○
14
DISP.(ERR.CODE)
Display Error Code by
Self-Diagnosis
Clause 4.10
−
15
ERR.CODE RESET
Clear Error Code
Clause 4.11
○
16
−
No assigned
Rotary
position
of Switch-1
COC4-A02S1
Description
Related
chapters
Protectable
items by
password
1
MEASURE
Real-Time Measurement
Clause 4.1
−
2
RECORD(RMS)
Fault Record – Measurement Value
Clause 4.2
−
3
RECORD (ELE.)
Fault Record – Relay Element
Clause 4.3
−
4
LAPSE
Relay Element Detection before Trip
Clause 4.4
−
5
DISP. (SET.)
Display Relay Element Setting
Clause 4.5
−
6
−
No assigned
7
SETTING
Change Relay Element Setting
Clause 4.6
○
8
FORCED OP.(TRIP)
Forced Operation for Trip Digital
Output
Clause 4.7
○
9
FORCED OP.(
I>
)
Forced Operation for Relay Element
(Time Overcurrent, 51)
Clause 4.8
○
10
FORCED OP.(
I>>
)
Forced Operation for Relay Element
(Instantaneous Overcurrent, 50)
Clause 4.8
○
11
FORCED OP.(
I >
)
Forced Operation for Relay Element
(Ground Overcurrent, 50N, 51N)
Clause 4.8
○
12
−
No assigned
13
RECORD RESET
Clear Fault Record Data
Clause 4.9
○
14
DISP.(ERR.CODE)
Display Error Code by
Self-Diagnosis
Clause 4.10
−
15
ERR.CODE RESET
Clear Error Code
Clause 4.11
○
16
−
No assigned
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)
Table 3-2 Select items of Switch-1 (COC4)
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JEP0-IL9537
Rotary position
of Switch-2
CBV2-A02S1
Description
Related chapters
1
VAB
RMS value of phase-to-phase voltage
Clause 4.1, 4.2, 4.3
2
VBC 3 VCA
Rotary position
of Switch-2
COC4-A02S1
Description
Related chapters
1
IA
RMS value of phase current
Clause 4.1, 4.2, 4.3
2
IB
3
IC
4
I0
RMS value of zero-sequence current
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)
Table 3-4 Measurement items of Switch-2 (COC4)
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JEP0-IL9537
3.4. Switch-3: Setting Item Switch
Rotary position
of Switch-3
CBV2-A02S1
Description
Related
chapters
1 U<(V)
Undervoltage operating value
Clause 4.5, 4.6
2 U<TIME (s)
Undervoltage operating time
3 U<UV-TEST
Undervoltage test mode
4 U>(V)
Overvoltage operating value
5 U>TIME (s)
Overvoltage operating time
6 −
7 −
8 − 9 −
10
FREQ.
Frequency setting
11
ALARM HOLD
Digital output condition of alarm contact by
self-diagnosis
(hold / un-hold)
12 −
13
COMM. ST. No.
Slave address of Modbus
14 −
15
PASSWORD
Set password
Even though Switch-1 set “DISP. (SET.)”,
current password doesn’t displayed.
16 −
Rotary position
of Switch-3
COC4-A02S1
Description
Related
chapters
1
I>
(A)
IDMT overcurrent operating value (51)
Clause 4.5, 4.6
2
I>
TM
IDMT overcurrent time multiplier (51)
3
I>
CURVE
IDMT characteristic curve (51)
4
I>>
(A)
Instantaneous overcurrent operating value
(50)
5
I >
(A)
Ground overcurrent operating value (51N)
6
I >
TM
IDMT ground overcurrent time multiplier
(51N)
7
I >
CURVE
IDMT characteristic curve (51N)
8
I >>
(A)
Instantaneous ground overcurrent
operating value (50N)
9 −
10
FREQ.
Frequency setting
11
ALARM HOLD
Digital output condition of alarm contact by
self-diagnosis
(hold / un-hold)
12 −
13
COMM. ST. No.
Slave address of Modbus
14 −
15
PASSWORD
Set password
Even though Switch-1 set “DISP. (SET.)”,
current password doesn’t displayed.
16 −
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)
Table 3-6 Setting Item of Switch-3 (COC4)
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Turn Switch-1 to
“MEASURE” (position 1).
Turn Switch-2
Indicate
measured value
on 7-seg. LED.
Indicate value
according to
position of
Switch 2.
Indicate value
according to
position of
Switch-2.
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.
voltage meter or current meter).
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Turn Switch-1 to “RECORD
(RMS)” (position 2).
Turn Switch-2.
At the beginning, the figure
one (1) which means latest
phenomenon is indicated.
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.
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.
voltage meter or current meter).
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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 2nd latest phenomenon
is indicated.
Measured value when the
relay element was operation is
indicated on 7-seg LED.
The indicating period of one
phenomenon is 1 second.
The corresponding value of
the selected phase with
Switch-2 is indicated.
If you turn Switch-2 until
going to next phenomenon,
measured value of this
phenomenon is indicated.
In this case, VBC of 2nd
phenomenon is indicated.
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Next, the figure three (3)
which means 3rd new
phenomenon is indicated.
Even when you are turning
Switch-2, the displaying
phenomenon goes to next
order.
In this case, VBC of 3rd new
phenomenon is indicated.
After the indicating the oldest
phenomenon in the save data,
it goes back to latest (1st)
phenomenon.
Above sequence is repeated.
When you would like to check
again or read out other phase
value, Switch-2 is turned.
In this case, VAB of 1st
phenomenon is indicated.
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Turn Switch-1 to “RECORD
(ELE.)” (position 3).
At the beginning, the figure
one (1) which means latest
phenomenon is indicated.
The condition when relay
elements were operated
(tripped) is displayed on the
operation indicator.
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. The indicating period of one phenomenon is 1 second.
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Next, the figure two (2) which
means 2nd 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 3rd latest
phenomenon is indicated.
The condition when relay
elements were operated
(tripped) is displayed on the
operation indicator.
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After the indicating the oldest
phenomenon in the save data,
it goes back to latest (1st)
phenomenon.
<NOTE>
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. To avoid this situation, please push “INDICATOR RESET” button and turn off current LED
glowing.
In case of occurring fault evolution, the first tripped condition is saved as latest fault record.
For example it is considered that a fault evolution from VAB to VBC. It is assumed that the VBC fault occurs
after few seconds from V
AB
fault.
In the beginning, the “OPERATION INDICATOR” of VAB is glowed and this condition is saved as a latest
fault record. Next, when VBC fault is occurred during VAB fault, the LED of VBC is also glowed but new fault
record is not created.
If VBC fault is occurred after cleared VAB fault, LED of VBC is glowed and new fault record is created.
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Turn Switch-1 to “PICK UP”
(position 4).
In the condition before relay
trip besides after fault
detection, 7-seg LED shows
the count up condition by
figure from 1 to 10.
Under the count up condition,
the “OPERATION
INDICATION” LED of the
detecting element is blinking.
As an example, this figure
shows the undervoltage
element is detecting.
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.
Second, it shows the condition after tripping.
In the condition before relay trip besides after fault detection, 7-seg LED shows the count up condition by
figure from 1 to 10. When this count up reaches to 10, the protection relay trips and digital output (DO) is
closed. After relay tripping, 7-seg LED indicates “U” in this “PICK UP” function.
If instantaneous operation element, you would be difficult to read out the count up figures because count up
condition is completed immediately.
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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.
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Turn Switch-1 to “DISP
(SET.)” (position 5).
The setting value linked in
Switch-3 position is indicated.
The indicated data is current
setting value.
By turning Switch-3, each
setting value can be checked.
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.
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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.
When the password lock
is enabled, “000” is
indicated.
The blinking LED shows
the operated digit.
You can change the
figure using Switch-4.
4.6. Change Relay Element Setting [SETTING]
The new setting of the relay element can be changed by “SETTING” function.
4.6.1. Under Protection by Password
When the password is set, input the password to enter the setting mode.
If using no password, following operation can be passed.
How to set password shows sub-clause 4.6.8.
(1) Input Password
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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.
E
Turn Switch-4 to input
the password.
Go to sub-clause 4.6.1(2) or 4.6.1(3).
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(2) 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.
Inputted password is
indicated.
As an example, it is show that
correct password is “205” but
“201” is inputted.
Blinking LED moves to left.
And indicated values on 7-seg
LED goes back to zero “000”.
Please try again inputting
password.
E
(3) If Wrong Password
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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.
After no operation for 2
seconds, blinking is stopped.
The indicated value is saved
as a new setting value.
This new value is enabled for
relay element immediately.
Therefore, in service
condition, DON’T change the
relay setting.
4.6.2. Set Numerical Values
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LED Indication
Detail
This value means “OFF” setting of the Test Mode in the over/under voltage
element.
This value means “AB-phase” setting of the Test Mode in the over/under voltage
element.
This value means “BC-phase” setting of the Test Mode in the over/under voltage
element.
This value means “CA-phase” setting of the Test Mode in the over/under voltage
element.
“UV TEST” LED is turned on.
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. It is because that an amplifier
would output a single phase under testing. For undervoltage element, other phases which not related to the
testing are interfered with the under testing phase.
This UV-TEST mode inactivates this OR sequence of each phase and enable a single-phase operation.
Table 4-1 shows the setting items of the UV-TEST.
Table 4-1 LED indication for test mode (CBV2)
For example, in case of setting “AB-phase”, this protection relay focuses on “AB-phase”. Even though
BC-phase and CA-phase are zero voltage, the undervoltage element doesn’t operate when AB-phase is
injected beyond the setting value.
<ATTENTION>
DON’T forget the setting back to off before in-service condition.
Under the UV-TEST mode, the yellow LED of “UV-TEST” is turned on. The position of “UV-TEST” LED is
shown in Fig. 4-1
Fig. 4-1 Position of “UV-TEST” LED
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LED Indication
Abbreviated
Name
Details
0
NI01
IEC Normal Inverse
In equation (4-1), k=0.14, =0.02, c=0.
1
VI01
IEC Very Inverse
In equation (4-1), k=13.5, =1, c=0.
2
EI01
IEC Extremely Inverse
In equation (4-1), k=80, =2, c=0.
3
LI01
Long Inverse
In equation (4-1), k=54, =1, c=0.
4
DT01
Definite Time
Refer to equation (4-2)
5
DT(INST)
Instantaneous operation
6
NI11
Normal Inverse (IEEE Moderately Inverse)
In equation (4-1), k=0.0515, =0.02, c=0.114.
7
EI11
Extremely Inverse (IEEE Very Inverse)
In equation (4-1), k=19.61, =2, c=0.491.
8
EI12
Extremely Inverse (IEEE Extremely Inverse)
In equation (4-1), k=28.2, =2, c=0.1217.
9
NI21
Normal Inverse
In equation (4-1), k=2.4, =0.4, c=1.2.
10
VI21
Very Inverse
In equation (4-1), k=16, =1, c=0.4.
11
LI21
Long Inverse
In equation (4-1), k=60, =1, c=0.
12
MI31
Moderately Inverse
In equation (4-3), A=0.1735, B=0.6791, C=0.8, D=−0.08, E=0.1271.
13
NI31
Normal Inverse
In equation (4-3), A=0.0274, B=2.2614, C=0.3, D=−4.1899,
E=9.1272.
14
VI31
Very Inverse
In equation (4-3), A=0.0615, B=0.7989, C=0.34, D=−0.284,
E=4.0505.
15
EI31
Extremely Inverse
In equation (4-3), A=0.0399, B=0.2294, C=0.5, D=3.0094,
E=0.7222.
10
( ) 1
kM
tc
I
················································································································
(4-1)
2
10
M
t
·······························································································································
(4-2)
23
(1 ) (1 )
B D E
t M A
IC
CC
························································································
(4-3)
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).
Table 4-2 LED indication for IDMT characteristic curve (COC4)
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Turn Switch-3 to FREQ.
(position 10).
The current setting value is
indicated.
This example shows 50Hz as a
setting value.
After showing current setting
value, all LEDs are blinking.
You can select new value
using Switch-4.
After No operation for few
seconds, blinking is stopped.
The indicated value is saved
as a new value.
4.6.5. Set FREQ.
There is FREQ. setting for the selecting 50 Hz or 60 Hz.
<NOTE>
Check setting power system frequency before in-service condition.
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Items
RUN LED
(green)
ALARM
LED
(red)
Alarm
Contact
Output
Protection
element
Others
Normal
condition
ON
OFF
OFF
Enable
−
Error condition
OFF
ON
ON
Lock
(disable)
Save error code (Refer to clause
4.10.)
After recovering
from error with
ALARM HOLD
= OFF
ON
OFF
OFF
Enable
If the intermittently or temporarily
fault conditions is occurred, the
protection relay could recover
after the error cleared.
If the error cannot cleared, the
behavior of the Error condition is
continued.
After recovering
from error with
ALARM HOLD
= ON
OFF
ON
ON
Lock
(disable)
Regardless of the cause of
errors the relay holds (keeps)
the condition at that time of the
error detection.
To recover from the error
condition, please try push
"INDICATOR RESET" button or
restart the protection relay by
auxiliary power off.
Turn Switch-3 to ALARM
HOLD (position 11).
The current setting value is
indicated.
This example shows “OFF” as
a setting value.
After showing current setting
value, all LEDs are blinking.
You can select new value
using Switch-4.
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.
Table 4-3 Protection relay behavior in alarm condition
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Turn Switch-3 to COM. ST.
No. (position 13).
The current setting value is
indicated.
After showing current setting
value, all LEDs are blinking.
You can select new value
using Switch-4.
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”.
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Turn Switch-1
to SETTING
(position 7).
Turn Switch-3
to PASSWORD
(position 15).
Setting digit is
blinking.
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.
By this password, some operation items of Switch-1 are protected.
The protected items are shown in Table 3-1 and Table 3-2.
How to input the password, refer to clause 4.6.1.
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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.
E
Turn Switch-4 to
change the password.
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After no operation for 2
seconds, blinking is
stopped.
These indicated values
are saved as new
password.
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Turn Switch-1 to “FORCED
OP. (TRIP)” (position 8).
The “EL1” is indicated.
This means that the digital
output for the trip contact
can be operated.
Push
“PORCED OPERATION”
button.
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.
If password function is not used, the condition directly goes to following steps.
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01
03
05
07
09
11
13
15
19
17
21
02
04
06
08
10
12
16
20
18
22
Ｅ
Auxiliary power
supply
ALARM contact
Trip contact
14
Trip contact
ALARM contact
Earth circuit
RS485 NETP
RS485 NETSG
RS485 NXTN
The functions of these
terminals are dependent on
each protection device.
The functions of these
terminals are dependent on
each protection device.
＋
Trip contact closes.
(Terminal no. 13-14)
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Rotary position of Switch-1
Displayed value in 7-seg. LED
COC4
CBV2
9
EL2
○
○
10
EL3
○
○
11
EL4
○
−
Turn Switch-1 to “FORCED OP. (*)”.
In CBV2, indicating as "FORCED OP.
(U<)", "FORCED OP. (U>) ".
The “EL2～EL4” are
indicated.
This means that the digital
output for the indicator
contact can be operated.
Note: EL4 items is available
corresponding to each
relay model. More detail,
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.
If password function is enabled, please refer to clause 4.6.1. Following operation steps shows the condition
after inputting correct password.
If password function is not used, the condition directly goes to following steps.
The relationship between the rotary position of Switch-1 and the displayed value in 7-seg LED are shown in
Table 4-4.
Table 4-4 Relationship between Switch-1 position and the 7-seg LED
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Push
“PORCED OPERATION”
button.
01
03
05
07
09
11
13
15
19
17
21
02
04
06
08
10
12
16
20
18
22
Ｅ
Auxiliary power
supply
ALARM contact
Trip contact
14
Trip contact
ALARM contact
Earth circuit
RS485 NETP
RS485 NETSG
RS485 NXTN
The functions of these
terminals are dependent on
each protection device.
The functions of these
terminals are dependent on
each protection device.
＋
The contact close (the
operated terminal
number depends on
the relay model).
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Turn Switch-1 to “RECORD
RESET” (position 13).
After the Switch-1 setting
this position, the remaining
time until the deletion is
shown in the progress bar on
7-seg LED.
The time until deletion start is
about 3 seconds.
When you would like to
CANCEL the deletion, please
change Switch-1 to other
positions until appearing three
(3) bars.
When the progress bar is
reached to third digit, the
records clear is completed.
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.
If password function is not used, the condition directly goes to following steps.
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Error code
Details
01
ROM check
02
RAM check
03
Analog input (A/I) check
04
A/D operating check
05
Digital output (D/O) condition check
06
Digital output (D/O) operation check
07
Analogue filter check
10
Watch dog timer (WDT) check
12
A/D accuracy check
Turn Switch-1 to “DISP.
ERR.CODE” (position 14).
The error code is appeared.
This number is an example.
If the protection relay has no
error, nothing is displayed.
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.
Table 4-5 Description of error code
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Turn Switch-1 to “ERR.
CODE. RESET” (position 15).
After the Switch-1 setting
this position, the remaining
time until the deletion is
shown in the progress bar on
7-seg LED.
The time until deletion start is
about 3 seconds.
When you would like to
CANCEL the deletion, please
change Switch-1 to other
positions until appearing three
(3) bars.
When the progress bar is
reached to third digit, the
records clear is completed.
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.
If password function is not used, the condition directly goes to following steps.
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JEP0-IL9536
Revised in Jan. 2019
HEAD OFFICE: 7-3 MARUNOUCHI 2-CHOME, CHIYODA-KU TOKYO, 100-8310, JAPAN
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