Mitsubishi Electric CBV2-A01D1 User manual

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MITSUBISHI
ELECTRIC
Mitsubishi Digital Protection Relay
MELPRO TM – D Series
CBV2 – A01D1 VOLTAGE RELAY
INSTRUCTION MANUAL
MITSUBISHI ELECTRIC CORPORATION
Changed :Jan. 2005
Changes for the Better

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- Introduction -
Thank for your purchasing MITSUBISHI ELECTRIC MELPRO TM – D Series Digital Protection Relay.
Please read this manual carefully to be familiar with the functions and performances enough to use the
product properly.
Please note end users are required to be provided with this instruction manual.
For operation of the product, this manual should be used in conjunction with the following materials:
Title of document Document No.
MELPRO – D Series Protection Relay General Operation Manual PCKN-OIL750
When the protection relay is used together with a communication card, use the following documents too:
(For CC-Link)
Title of document Document No.
MELPRO – D Series Protection Relay CC-COM Communication Card (CC-Link)
Operation Manual (General information) PCKN-OIL751
MELPRO – D Series Protection Relay CC-COM Communication Card (CC-Link)
Operation Manual (Model-specific information) PCKN-OIL752
(For MODBUS)
Title of document Document No.
MELPRO–D Series Protection Relay RS-COM Communication Card (MODBUS)
Operation Manual (General information) PCKN-OIL703
MELPRO–D Series Protection Relay RS-COM Communication Card (MODBUS)
Register Map (For CBV2-A01D1 Voltage Relay) PCKN-OIL716

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– CONTENTS –
1Features .......................................................................................................................................................4
1.1 General description ......................................................................................................................4
1.2 Features........................................................................................................................................4
2Rating and specifications.............................................................................................................................6
2.1 General information ......................................................................................................................6
2.2 Protective elements ......................................................................................................................7
2.3 Measurement elements ................................................................................................................7
3Characteristics .............................................................................................................................................8
3.1 Protective elements ......................................................................................................................8
3.2 Measurement elements ................................................................................................................8
3.3 Common technical data................................................................................................................9
4Functions....................................................................................................................................................10
4.1 Protection....................................................................................................................................10
4.2 Measurement..............................................................................................................................13
4.3 Self-diagnosis .............................................................................................................................14
4.4 Communication...........................................................................................................................15
5Configuration..............................................................................................................................................17
5.1 Internal configuration ..................................................................................................................17
5.2 External connection ....................................................................................................................20
6Handling .....................................................................................................................................................25
6.1 Unpacking...................................................................................................................................25
6.2 Transportation and storage ........................................................................................................25
6.3 Appearance and how to pull sub unit out ...................................................................................25
6.4 How to use front control panel....................................................................................................28
7Mounting ....................................................................................................................................................35
7.1 Mounting dimension ...................................................................................................................35
7.2 Standard operating environment ................................................................................................35
8Test ............................................................................................................................................................36
8.1 Appearance inspection...............................................................................................................36
8.2 Characteristic test.......................................................................................................................37
9Maintenance ..............................................................................................................................................39
9.1 Daily inspection ..........................................................................................................................39
9.2 Periodical inspection...................................................................................................................39
10 Ordering .....................................................................................................................................................40

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1 Features
1.1 General description
Mitsubishi Electric MELPRO-D Series is a digital protection relay product with a microprocessor for
protecting high/extra-high-voltage electric power system.
With its improved functions, including operation support using the advanced communication networks,
data saving at the power system faults and power system voltage/current measurement, this series of
protection relay will allow stable and effective control and monitoring of electric power systems as well as
provide high-reliable protection.
1.2 Features
(1) High-reliable protection
The product includes a three-phase undervoltage and a three-phase overvoltage element.
It is used to detect abnormal voltage between lines.
(2) Communication Network
- With an open field bus system, the relays can be used to build a high-speed, high-performance
network system. In addition, the relay’s multi-drop serial wiring reduces the amount of labor
required for communication wiring.
- Control of measurement values, operation status, as well as setting changes, etc., can be
performed from a remote location.
- In consideration of future network system variations and compatibility with communication
networks, communication features are mounted in the relay using a replaceable card.
(3) Measurement & Recording Functions
- Real time monitor of relay input data
The relay can measure steady state relay input values, supporting energy management.
- Fault Data Monitor
When a fault occurs, the relay saves the past 5 effective input values and harmonics data to
assist with fault analysis.
(4) Programmable Output Configuration
The operating output contacts (DO) can be set by combining the outputs of the protection relay
element using ‘OR’ logic, thereby simplifying sequence design.
(5) High Accurate Digital Computation
The digital computation using high-speed sampling minimizes the effect of high harmonics, etc., and
results in highly accurate protection.
(6) Self-diagnosis
The relay continuously monitors electronic circuits from input to output so that it can detect internal
failure before that failure causes damage on the power system, thereby improving reliability.
(7) Easy Replacement
The dimensions of the panel cutout are the same as the prior MULTICAP series. Changing from an
existing relay type to this new type is easy.

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(8) Easy Maintenance
The relays are adopted as draw-out unit mechanisms with automatic CT shorting at drawing, thereby
making maintenance easy.
(9) Easy wiring check
It is possible to carry out forced operation of the output contacts individually. This will allow an easy
wiring check.

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2 Rating and specifications
2.1 General information
Type name CBV2-A01D1
Relay without RS232C I/F 354PMB 355PMB
Style Relay with RS232C I/F 541PMB 542PMB
Undervoltage element ×31
Protection Overvoltage element × 3
Element
Measurement Voltage
Frequency 50 Hz 60 Hz
Voltage 57 ~ 120 V
Voltage Common use for 100 ~ 220VDC / 100 ~ 220VAC
Rating Auxiliary
power supply
*21 Operative range DC : 85 ~ 242 V (Range of 80 ~ 286VDC is allowable temporarily.)
AC : 85 ~ 242 V (Range of 80 ~ 253VAC is allowable temporarily.)
RUN Indicate the result of self-diagnosis. The lamp is lit for normal conditions
and off for abnormal.
Unit Indicate the unit symbol for measurements.
Item No., Item data Display measurement, status, setting and option data selected with an item
number.
Display
Communication
With a communication card installed: the lamp is lit for normal conditions,
blinking during communication and off for abnormal.
With a communication card not installed: the lamp is off.
Self-diagnosis Monitor the electronic circuit and internal power supply to output signal to
the RUN LED and self-diagnosis output (ALARM).
For trip 2 make contacts: X4 and X5(programmable output)
For signaling 4 make contacts: X0to X3(programmable output)
Configurations For self-diagnosis
output 1 break contact: Y (open for normal result of self-diagnosis with power on)
Make 110VDC, 15A, 0.5 s (L/R = 0 s)
220VDC, 10A, 0.5 s (L/R = 0 s)
Break 110VDC, 0.3A (L/R<40 ms)
220VDC, 0.15A (L/R<40 ms)
For trip
Carry 1.5 A, continuously
Make and Break 500 VA (cosφ= 0.4),
60W (L/R = 0.007 s)
Max. current 5 A
Output
contacts
Capacity
For signaling and
self-diagnosis
output Max. voltage 380VAC, 125VDC
Voltage circuit 1 VA or less (with rated current)
Zero-phase voltage circuit 0.15 VA or less (with rated current)
Burden
Auxiliary power supply circuit
For 100VDC: approx. 5 W (approx. 7W including communication card)
For 100VAC: approx. 7 VA (approx. 9VA including communication card)
For 220VDC: approx. 6 W (approx. 8W including communication card)
For 220VAC: approx. 12 VA(approx. 14VA including communication card)
Mass Net weight of relay unit : approx. 2.3 kg
Including case : approx. 3.0 kg
Case/cover Size : D1 type
Color : N1.5
*21 When an uninterruptible AC power source is not provided in your system for the auxiliary supply voltage, use the
type CPS1 AC/DC converter or commercially available uninterruptible power supply (UPS).
Power supply product of 24VDC or 48VDC is also available if ordered (non-standard product).
In addition, the power supply duration of the type CPS1 AC/DC converter is confirmed about 2 seconds in
combination with one MELPRO-D series relay. Therefore, in the case that the required power supply duration after
power source loss exceeds 2 seconds, please use a suitable commercial uninterruptible power supply.
When the power supply back up for the control power supply of a circuit breaker is required, it is necessary to
prepare the backup power supply different from the type CPS1 AC/DC converter.

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2.2 Protective elements
Relay without RS232C I/F 354PMB 355PMB
Style Relay with RS232C I/F 541PMB 542PMB
Operation voltage LOCK - 10 ~ 110V (1V step)
Operation time INST - 0.1 ~ 10 s (0.1 s step)
Undervoltage
UV test
OFF – AB phase test – BC phase test – CA phase test
When execute the relay test, enable to use the selected input
phase only. “UV test” LED turn on during selecting "UV TEST".
Operation voltage LOCK – 60 ~ 155V (1V step)
Setting
*24
Overvoltage Operation time INST - 0.1 ~ 10 s (0.1 s step)
Forced operation Forced operation is available for any trip or signaling contact individually.
Operation indication Operation indicator LED (red) comes on when the relay operates.
2.3 Measurement elements
Relay without RS232C I/F 354PMB 355PMB
Style Relay with RS232C I/F 541PMB 542PMB
VT primary voltage
100 ~ 999V (1V step)
1000 ~ 9990V (10V step)
10.0k ~ 99.9kV (0.1kV step)
100k ~300kV (1kV step)
Option *24
VT secondary voltage 100/√3 -110/√3 -115/√3 -120/√3 -100-110-115-120[V]
(57.7) (63.5) (66.4) (69.3)
Conversion Indication value = Relay input value
×VT primary setting / VT secondary setting
Range *22 0.00 ~ VT primary setting / VT secondary setting ×165 [V]
Real time
Update Approx. 200 ms
Conversion Indication value = Relay input value
×VT primary setting / VT secondary setting
Max. record
Range *22 0.00 ~ VT primary setting / VT secondary setting ×165 [V]
Conversion Indication value = Relay input value
×VT primary setting / VT secondary setting
Display
Voltage
Fault record
*23 Range *22 0.00 ~ VT primary setting / VT secondary setting ×165 [V]
*22 The form of display depends on value range as shown in the tables below:
VT primary setting value determines the minimum number of digits to be displayed on each measurement display.
When a value to be displayed exceeds the max. value of the display range, the max. value will blink.
VT primary setting 100 ~ 500[V] 501 ~ 10000[V] 11 ~ 300[kV]
0 ~ 999[V] □□□[V] □.□□[kV] □.□[kV]
1.00 ~ 9.99[kV] □.□□[kV] □.□□[kV] □.□[kV]
10.0 ~ 99.9[kV] □□.□[kV] □□.□[kV] □□.□[kV]
Form of
display
100 ~ 999[kV] □□□[kV] □□□[kV] □□□[kV]
*23 When a communication card is connected, waveform data in the event of system fault can be read.
(See the section 4 “Function”).
*24 When the product is shipped from the factory, each setting value is “Lock” (With lock setting element) or “minimum
setting value“ (Without lock setting element).

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3 Characteristics
Common conditions
(1) Rated frequency: ±1%
(2) Ambient temperature: 20°C±10°C
(3) Aux. supply voltage: Rated voltage±2%
The conditions shown on the left
should be applied unless otherwise
specified.
3.1 Protective elements
Items Conditions Guaranteed performance
Undervoltage
element
Operation
value Overvoltage
element
(Common conditions) Setting value ±5%
Undervoltage
element
Operation value × 105% or
less
Reset value Overvoltage
element
(Common conditions) Operation value × 95% or
more
Undervoltage
element Rated voltage ÆSetting×70%
- For setting of INST
40ms or less
- For setting of 0.4s or less
Setting value ± 25ms
- For setting of 0.5s or more
Setting value ± 5%
Operation
time
Overvoltage
element 0 ÆSetting×120%
- For setting of INST
50ms or less
- For setting of 0.4s or less
Setting value ± 25ms
- For setting of 0.5s or more
Setting value ± 5%
Undervoltage
element Setting×70% ÆRated voltage
Reset time Overvoltage
element Setting×120% Æ0
60ms or less
3.2 Measurement elements
Items Condition Guaranteed performance
Real time and max. records ±1%
Fault record
VT primary setting /
VT secondary setting ×165 ±1%

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3.3 Common technical data
ITEM DESCRIPTION CONDITION STANDARD
Ambient operating
temperature -10°C to +55°C IEC60255-6
Ambient storage and
transport temperature -25°C to +70°C IEC60255-6
Environment
Damp heat +40°C, 95%RH, 4 days IEC60068-2-3
VT 1.15Vn, 3hThermal
withstand CT 40In, 1s
Circuit of 60V or below 500VAC, 1min.
Circuit of more than
60V and 500v or below 2000VAC 1min.
1) Between each circuit
and the exposed
conductive parts, the
terminals of each
independent circuit
being connected
together
2) Between independent
circuits, the terminals of
each independent circuit
being connected together
Dielectric test
Open contact 1000VAC, 1min. Between open contact poles
IEC60255-5
Impulse voltage test 5kV, 1.2µs/50µs
1) Between each circuit
and the exposed
conductive parts, the
terminals of each
independent circuit
being connected
together
2) Between independent
circuits, the terminals of
each independent circuit
being connected together
IEC60255-5
Common mode 2.5kV peak, 1MHz with 200Ω
source impedance for 2s
Between independent
circuits, and between
independent circuit and earth
High-frequency
disturbance test
Differential mode 1.0kV peak, 1MHz with 200Ω
source impedance for 2s
Across terminals of the same
circuit
IEC60255-22-1
class 3
8kV Contact discharge
Electrostatic discharge test 15kV Air discharge
IEC60255-22-2
Class 4
Radiated electromagnetic field
disturbance test
68 to 87Mhz
146 to 174MHz
420 to 470MHz
IEC60255-22-3
class 3
Fast transient disturbance test 2.0kV, 5ns/50ns, 1min IEC60255-22-4
Vibration test Refer to class 1 IEC60255-21-1
Class 1
Shock response Refer to class 2 IEC60255-21-2
Class 2
Shock withstand Refer to class 1 IEC60255-21-2
Class 1
Bump Refer to class 1 IEC60255-21-2
Class 1
Enclosure protection IP51 IEC60529
Vn: Rated voltage, In: Rated current

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4 Functions
4.1 Protection
4.1.1. Undervoltage elements
Fig. 4.1 “Undervoltage element internal function block diagram” shows operation of the undervoltage
elements.
Undervoltage element compares input voltages of voltage circuit with the operation setting. If an input
voltage is less than the specified operation level, the element outputs an operation signal when the timer
expires.
Undervoltage element detected
(Operation indicator LED blinking) Undervoltage element detected
(Operation indicator LED lit)
Operation signal
(Undervoltage element)
VAB
Undervoltage element
Voltage comparison
Timer
(trip/reset)
A
B-phase processing
BC-phase processing
Same as processing in AB-phase
VBC
VCA
CA-phase processing
Same as processing in AB-phase
Figure 4.1 Undervoltage element internal function diagram
4.1.2. Overvoltage elements
Fig. 4.2 “Overvoltage element internal function block diagram” shows operation of the overvoltage
elements.
Overvoltage element compares input voltages of voltage circuit with the operation setting. If an input
voltage is larger than the specified operation level, the element outputs an operation signal when the timer
expires.
Overvoltage element detected
(Operation indicator LED blinking) Overvoltage element detected
(Operation indicator LED lit)
Operation signal
(Overvoltage element)
VAB
Overvoltage element
Voltage comparison
Timer
(trip/reset)
A
B-phase processing
BC-phase processing
Same as processing in AB-phase
VBC
VCA
CA-phase processing
Same as processing in AB-phase
Figure 4.2 Overvoltage element internal function diagram

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4.1.3 General functions
(1) Setting of operation voltage
The operation voltage settings for undervoltage and overvoltage elements are indicated with voltage
values [V].
When the setting “Lock”, the elements selected are locked for operation.
(2) Setting of operation timer
The operation time settings for undervoltage and overvoltage elements are indicated with second [s].
(3) Operation display
For undervoltage element, when the input voltage becomes less than the operation setting, the
corresponding operation indicator LED will blink to allow you check the starting value.
For overvoltage element, when the input voltage becomes larger than the operation setting, the
corresponding operation indicator LED will blink to allow you check the starting value.
The LED lamp will come on as soon as an operation output is made when a period of operation time
has elapsed.
The operation indicator LED has been set to “self-hold” in the factory. This setting can be freely
changed to “auto reset”.
With the “self-hold” setting, data of the latest operation indication will be stored in the internal memory
even if the auxiliary power supply runs down.
The data stored will be cleared when the “indicator reset” switch is pressed.
Up to latest five phenomena can be stored and displayed as a history record. (Older data than the
latest five phenomena will automatically be cleared).
Item No. History Sequence of recording
311 1st phenomena
312 2nd phenomena
313 3rd phenomena
314 4th phenomena
315 5th phenomena
Latest fault record data
↓
↓
↓
Oldest fault record data

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(4) Output contacts
The signaling outputs X0to X3and trip outputs X4and X5are all programmable type.
The factory default setting of the arrangement of these outputs is as shown in the internal function
block diagram of Figure 5.2. This setting can be freely changed by specifying outputs of the internal
elements based on the OR logic.
All the outputs have been set to “auto reset” in the factory. Any of them can be changed to “self hold”.
X0
X5
X3
X4
Ｉ >>
Ｉ >
Ｉ >>
Ｉ >
Signaling
(4 circuits)
Trip
(2 circuits)
Set output logic as
desired by using
OR logic.
Figure 4.3 Schematic image of Programmable Outputs (example: COC4-A01)
(5) Forced operation
It is possible to carry out forced operation of any of the signaling outputs X0to X3and trip outputs X4
and X5independently. Forced operation is useful for checking the wiring.
When forced operation is carried out, the corresponding LED lamps will come on to show the current
status of the programmable outputs. Checking the lamp status will be useful not only for wiring check
but also to check the programmable outputs arrangement.

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4.2 Measurement
Voltages input to the relay are measured and converted into freely set VT primary voltages, then indicated
in the display.
(1) Real time measurement
The effective voltage input to the relay under steady state is displayed.
(2) Max. record
The maximum effective voltage is recorded and stored.
The max. record will be all cleared when “aux. power supply OFF” or “max. record reset” operation is
made.
(3) Fault record
In the event of system fault, the effective voltage and waveform data that have been measured at the
time when one of the protection elements operates to issue an output signal are stored. Data of up to
five phenomena can be stored and displayed for each phase.
With “aux. power supply OFF”, only the waveform data will be cleared and the effective voltage data
will remain. With “fault record reset” operation, however, both of the data items will be all cleared.
(Records older than the 5th phenomenon will automatically be cleared.)
Item No. History Sequence of recording
211 1st phenomena
212 2nd phenomena
213 3rd phenomena
214 4th phenomena
215 5th phenomena
Latest fault record data
↓
↓
↓
Oldest fault record data
The following fault waveform data can be collected if a communication card is installed:
Item Specification
Data sampling cycle Fixed to the electric angle of 30° of rated frequency
Data storing capacity (for
a phenomenon)
224 cycles of rated frequency
(Data point: 224×360°/30° = 2688 points)
Permissible setting range 224 cycles before trip ~ 224 cycles after trip
Collected data The range for data collection can be set by cycle within the
“data storing capacity” in the “permissible set range”.
224 cycles after trip→
←224 cycles before trip
Collected data
Up to 224 cycles
Data sampling cycle
Trip occurs!
Output contact
ON
OFF
Permissible set
Figure 4.4 Concept of recording fault waveform

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4.3 Self-diagnosis
The self-diagnosis function monitors the electronic circuit and built-in power source continuously. If an
abnormal condition occurs, the protection elements will be locked for operation. Also, the RUN LED lamp
will go off and the self-diagnosis output contact (break contact) will be closed.
(1) Checking defect code at failure detection
When a failure is detected, the defect code will be recorded. This defect code can be checked
through the self-diagnosis (ALARM) status indication.
(2) Resetting self-diagnosis output
If a failure is detected, the failure status may be reset by turning off/on the power.
In this case, be sure to lock the trip circuit on the external wiring of the relay before resetting. (If
the failure persists, an erroneous output may be caused).
(3) Clearing the defect code
The defect code data stored at failure detection can not be cleared only by carrying out the power
on/off procedure in the item (2) above. All the defect code numbers that have been detected since
the previous “self-diagnosis reset” (RESET ALARM) operation was made are accumulated in the
memory. To clear the record data, carry out “self-diagnosis reset” (RESET ALARM) operation.
Table 4.1 Output for protection relay failures
Output
Display
Status Detected items
RUN Defect
code
ALARM
(break
contact)
Operation
output lock
Normal −On Open Not locked
Power circuit
failure −Locked
CPU failure −
No
display
Not locked
ROM check 0001
RAM check 0002
A/D accuracy check 0003
A/I check 0004
A/D check 0005
SRAM check 0006
D/O status check 0008
D/O operation check 0009
Analog filter check 0010
A/I double check 0011
D/I check ＊41 0012
E2PROM check 0013
Computing function check 0014
WDT check 0015
Data transfer check ＊42 0016
Differential current check ＊43
Off
0017
Closed
Locked
Communication card check ＊44 0028
Communication card channel No. switch setting error ＊44 0029
Communication card portrait switch setting error ＊44 0030
Communication card channel No. switch change error ＊44 0031
Monitor
error
Communication card portrait switch change error ＊44
On
0032
Open Not locked
＊41 Monitored only in the models with built-in D/I function.
＊42 Monitored only in the models with D2 unit.
＊43 Monitored only the biased differential relay.
＊44 Monitored only when the relay is installed with communication card.

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4.4 Communication
Figure 4.5 shows an example of network system configuration.
For more information on the communication facilities, see the materials shown in the introduction (page
2).
Figure 4.5 Example of communication network system configuration
Central Control System
The network system enables the central control system to full
y
access to the protection relays, and achieve remote monitoring o
f
the measurement values, operational status etc as well as
remote operation such as change of settings. Thereby efficien
t
operation and maintenance are realized.
- ModBus
(RS485)
- CC-Link
RTU
Remote Operation and Monitorin
g
By connecting PC with relay via the RS232C port located on the
relay panel, local operation and monitoring are enabled as same
as the remote operation and monitoring. Thereby the
maintenance work at site is strongly supported.
RS232C
Local Operation and Monitoring for Site Maintenance
- Measurement value
- Relay settings
- Relay operation status
- Fault Record
- Monitoring status
- Time
- Measurement setting
- Relay setting
- Time Adjustment
Remote Operation Remote Monitoring
Local Operation Local Monitoring

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Using the communication facilitates, it is possible to perform Remote Monitoring and Remote Operation
with the various useful functions shown in Table 4.2.
Table 4.2 Outline of functions enabled by communication network
Direction of
communication Item Description
Setting Read the settings stored in the protection relay.
Measurement Read the measurements stored in the protection relay.
Max. value Read the max. values stored in the protection relay.
Fault record Read the measurements at the time of trip.
Self-diagnosis (ALARM) Read the result of self-diagnosis.
Operation element Read the elements that operated at the time of trip.
Operation time Read the time at the time of trip.
Current time Read the internal time of the communication card.
Remote
Monitoring
RTU Protection
relay
Waveform record Read the wave form at the time of trip.
Setting Change the setting of the protection relay.
Indicator reset Reset the LED lamp that came on at the time of trip.
Self-diagnosis (ALARM) reset Clear the result of self-diagnosis.
Fault record reset Clear the fault record, operation elements and
operation time data.
Max. record reset Clear the max. record.
Forced operation Carry out forced operation of output contact.
Remote
Operation
RTU Protection
relay
Time Set time of communicate card.

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5 Configuration
5.1 Internal configuration
(1) I/O and CPU circuits
Fig. 5.1 shows the internal block diagram of the model CBV2-A01D1.
Voltage input is converted into AC signals at the electronic circuit level via the auxiliary transformer
and filter circuits. These signals are retained as a form of DC signal in the sample hold circuit on each
channel sharing a same time. The multiplexer selects a channel to take the signal and sends it to an
A/D converter. The signals are converted to digital signals sequentially in the converter to be sent to
the CPU.
The setting circuit is used to input setting data into the CPU.
These inputs will be used to carry out the functions shown in Fig. 5.2 “Internal function block diagram”,
and then issue output signals to the display and output relay.
(2) Self-diagnosis circuit
When the self-diagnosis function detects that the electronic and power circuits are normal, the output
relay will be energized to open the self-diagnosis output contact (break contact).
The self-diagnosis output contact (break contact) will be closed when a failure occurs in the circuits
above or when the built-in power fuse burns.

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UndervoltageCAphaseInd.
UndervoltageABphase Ind.
UndervoltageBCphaseInd.
OvervoltageCAphaseInd.
OvervoltageABphaseInd.
OvervoltageBCphaseInd.
U >
Setting
switches
A/D
Numerical display
A-07
VAB
A-0
8
S/HFilter
Trip
X5
X4
X3
X2
X1
X0
Communication indication
Unit indication
Trip indication
Power circuit
monitoring
A-01 AC/DC
DC/DC
Power
source
Auxiliary
power supply
A-03
+
Y
X
5
B-19
B-20
X4 B-17
B-18
Tri
p
contacts
Programmable output
B-07
B-08
X0
B-09
B-10
X1
B-11
B-12
X2
B-13
B-14
X3
Signaling
Self-diagnosis output
Y
Self-diagnosis output
B-05
B-06
Serial
communication
bus
D
A
B-01
DB
B-02
DG
B-03
SLD
B-04
EA-02
Run indication
Self-diagnosis
(Except comm. card)
Communication card
Self-diagnosis (only comm. card)
Reception circuit
Transmission circuit
MPX CPU
Overvoltage
element
A-09
VBC
A-10
S/HFilter
A-11
VCA
A-12
S/HFilter UV Test indication
Undervoltage
element
U <
Figure 5.1 Internal block diagram of Type CBV2-A01D1 relay

19 PCKN-OIL738
Signaling
UndervoltageABphaseInd.
A
-07
UndervoltageBCphase Ind.
Power circuit
monitoring
Self-diagnosis
(Except comm. card)
A
-01
A
-03
+
Programmable output
VAB
A
-0
8
UndervoltageCAphase Ind.
Trip indication
X1
X0
X2
X3
Trip
X4
X5
Self-diagnosis output
Y
B-0
5
B-06
Y
X
5
B-19
B-20
X
4
B-17
B-1
8
Trip
X
3
B-13
B-14
X
2
B-11
B-12
X1 B-09
B-10
X
0
B-07
B-0
8
DA
B-01
DB
B-02
DG
B-03
SLD
B-04
E
A
-02
Run indication
Communication indication
Auxiliary
power supply
AC/DC
DC/DC
Power
sourse Communication card
Self-diagnosis (only comm. card)
Reception circuit
Transmission circuit Serial
communication
bus
Self-diagnosis output
Programmable
output
U >
Overvoltage
element
A
-09
VBC
A
-10
A
-11
VCA
A
-12
Undervolta
g
e
Undervolta
g
e
Undervolta
g
e
Overvolta
g
e
Overvolta
g
e
Overvolta
g
e
OvervoltageABphaseInd.
OvervoltageBCphaseInd.
OvervoltageCAphaseInd.
Undervoltage
element
U <
Figure 5.2 Internal function block diagram of Type CBV2-A01D1 relay

PCKN-OIL738
20
5.2 External connection
(1) Connection diagram
Figures 5.4 to 5.5 show examples of input circuit (AC circuit) connection, Figure 5.6 an example of
control circuit (DC circuit) connection and Figure 5.7 a terminal arrangement.
In the terminals, M3.5 screws should be used and wires of 2 mm2or less are recommended to be
used.
(2) Precautions for wiring work
a. Important facilities should be provided with fail safe measures such as dual system to improve
reliability of the facilities.
b. Effects of external surge
Some type of surge with a certain condition may inversely affect the relay. If so, take it into account
to install MF type surge absorbers made by TM T&D.
c. Guarantee of AC auxiliary power supply against power interruption
The AC auxiliary power supply of the relay is not guaranteed against power interruption. When
you do not have an uninterruptible AC power source, use an AC/DC converter of CPS1 type
manufactured by TM T&D or uninterruptible power source (UPS) that is commercially available.
d. Inrush current of auxiliary supply
Since inrush current may flow in the relay when the auxiliary power supply is turned on as shown
in the figure below, make consideration of this point when selecting the breaker for the auxiliary
power supply circuit.
Input voltage Inrush current Ip
110V Approx. 20A
DC 220V Approx. 55A
100V Approx. 25A
AC 220V Approx. 65A
Figure 5.3 Inrush current of auxiliary power supply
e. Trip circuit
Only the contacts X4and X5can be used for the trip circuit. Please keep in mind that the contacts X0
to X3can not 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.
f. Self-diagnosis output circuit
The self-diagnosis output contact is so configured that the auxiliary relay can be energized (break
contact) with normal result of monitoring, in order to be able to continue monitoring even if the
Ip
A
pprox.
2ms
Inputting
Input voltage
Input current
0V
0V