ABB REJ 527 User manual

REJ 527
Directional or Non-Directional
Earth-Fault Relay
Operator’s Manual

3
Directional or Non-Directional
Earth-Fault Relay
Operator’s Manual
REJ 527
1MRS 751055-MUM
Issued: 07.07.99
Version: A/17.04.2001
Checked: H.S.
Approved: L.N.
We reserve the right to change data without prior notice.
Contents
1. Introduction ............................................................................... 6
1.1. About this manual ..........................................................................6
1.2. The use of the relay .......................................................................6
1.3. Features .........................................................................................6
1.4. Guarantee ......................................................................................7
2. Safety Information ..................................................................... 8
3. Instructions ................................................................................ 9
3.1. MMI features ..................................................................................9
3.1.1. Front panel ..........................................................................9
3.1.2. Display ..............................................................................10
3.1.2.1. Display idle mode ................................................10
3.1.2.2. Display test at power up ......................................10
3.1.2.3. Display backlight .................................................10
3.1.2.4. How to adjust display contrast ............................11
3.1.3. How to use push-buttons ..................................................11
3.1.4. How to select language .....................................................12
3.1.5. Main menu ........................................................................13
3.1.6. Submenu ...........................................................................13
3.1.7. How to switch between front and rear connectors ............14
3.2. MMI operation levels ....................................................................15
3.2.1. Main level ..........................................................................15
3.2.2. User level ..........................................................................15
3.2.2.1. Menu groups of the user level .............................15
3.2.2.2. How to monitor measured values ........................15
3.2.2.3. How to monitor recorded data .............................15
3.2.2.4. INFO ....................................................................16
3.2.2.5. Alarms .................................................................16
3.2.2.6. Self-supervision, IRF ...........................................17
3.2.3. Passwords ........................................................................18
3.2.4. Technical level ..................................................................18
3.2.4.1. Menu system of parameters ................................18
3.2.4.2. How to change settings .......................................19
3.2.4.3. Configuration .......................................................20
3.2.4.4. How to acknowledge and reset indicators,
outputs and registers ...........................................21
3.2.5. Menu chart ........................................................................22
3.3. Protection relay indications ..........................................................22
3.3.1. Indication messages .........................................................22
3.3.2. Priority of indication messages .........................................23

4
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
3.3.3. Protection indications .......................................................23
3.3.4. I/O test ..............................................................................23
3.3.5. Green indication LED .......................................................24
3.3.6. Yellow indication LED .......................................................24
3.3.7. Red indication LED ...........................................................25
4. Technical Description .............................................................26
5. Service ......................................................................................27
5.1. General ........................................................................................27
5.2. Secondary testing ........................................................................27
5.2.1. Testing of the matching transformers ...............................29
5.2.2. Testing of the zero-sequence voltage stage U0b> ............29
5.2.3. Testing of the non-directional earth-fault current
stages ...............................................................................29
5.2.4. Testing of the self-supervision system (IRF) ....................30
5.2.5. Testing of the binary input ................................................30
5.3. Spare parts ..................................................................................30
6. Ordering Information ..............................................................31
7. References ...............................................................................32
8. Index .........................................................................................33
9. Customer Feedback ................................................................35

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
5
1. Introduction
1.1. About this manual
The purpose of this manual is to provide the user with the basic information on the
relay REJ 527 and to focus on detailed instructions for using the Man-Machine
Interface (MMI) of the relay. In addition to the instructive part, the manual includes
a short chapter discussing the service of the relay.
1.2. The use of the relay
The directional or non-directional earth-fault relay REJ 527 is designed for earth-
fault current as well as zero-sequence voltage protection and supervision in
distribution substations. It can also be used for protection of generators, motors and
transformers. Generally the relay measures the zero-sequence voltage, earth-fault
current and phase angle of the system.
The low-set earth-fault current stage can be given a definite-time or an inverse-time
characteristic whereas the high-set earth-fault current stage and the voltage stage
feature the definite-time characteristic alone.The operation of the earth-fault current
and voltage stages can be blocked by means of an external control signal.
The protection relay REJ 527 is based on a microprocessor environment. A self-
supervision system monitors continuously the operation of the relay.
The MMI includes an LCD display which makes the local use of the relay safe and
easy.
Local control of the protection relay can be carried out with a portable computer
connected tothefrontconnector andremotecontrolviatherear connectorconnected
to the distribution automation system through the serial interface and fibre-optic bus.
1.3. Features
• Directional or non-directional low-set earth-fault current stage I0>with definite-
time or inverse definite minimum time (IDMT) characteristic
• Directional or non-directional high-set earth-fault current stage I0>> with
definite-time characteristic
• Deblocking zero-sequence voltage stage U0b>
• The two earth-fault current stages configurable to operate alternatively as two
voltage stages: a three-stage voltage monitoring operation possible
• Intermittent earth-fault protection
• Circuit-breaker failure protection (CBFP)
• Disturbance recorder
• Two accurate measuring inputs
• Galvanically isolated binary input with a wide input voltage range
• All settings can be modified with a personal computer
• Settings are stored into non-volatile memory and remain even in case of power
supply failure
• Two normally open power output contacts

6
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
• Two change-over type signal output contacts
• Output contact functions freely configurable for desired operation
• Optical PC-connector for two-way data communication (front)
• RS-485 connector (rear) for system communication
• Continuous self-supervision of hardware and software. At a permanent fault all
stages and outputs are blocked.
• Rated frequency user-selectable 50/60 Hz
• MMI with an alphanumeric LCD and manoeuvring buttons
• User-selectable password protection for MMI
• Display of primary current and voltage values as well as phase angle values
1.4. Guarantee
Please inquire the guarantee of your nearest ABB representative.

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
7
2. Safety Information
Dangerous voltages can occur on the connectors, even though the
auxiliary voltage is disconnected.
National and local electrical safety regulations must always be fol-
lowed.
The frame of the protection relay has to be carefully earthed.
Current transformer has to be short-circuited before disconnecting
the relay from it.
Only a competent electrician is allowed to carry out the electrical
installation.
!
!
!
!

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1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
3. Instructions
3.1. MMI features
3.1.1. Front panel
The front panel of the protection relay includes:
• an alphanumeric LCD display for 2 x 16 characters
• three indication LEDs (ready, start, trip)
• an MMI push-button section with four arrow buttons and buttons for Clear and
Enter
• an optically isolated serial communication port
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1. LCD display
2. Optical PC-connector
3. MMI push-button section
4. Indication LEDs:
• Left: Ready
• Centre: Start
• Right: Trip
REJ 527
Order No: REJ527A 411-BAA
Software No: 1MRS118015
Serial No: ER000001
Uaux = 110-240 Vac
Uaux = 48-220 Vdc
fn = 50/60 Hz
In = 0.2/1 A (Io)
Un = 100-120 V
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1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
9
3.1.2. Display
3.1.2.1. Display idle mode
Self-supervision tests are run during initialisation. After all tests are completed, the
display will return to idle mode showing the text ABB.
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3.1.2.2. Display test at power up
When the auxiliary voltage is connected to the protection relay:
1. The backlight goes on.
2. The LCD display is tested by inverting it for a short time.
3. The display returns to idle mode and the backlight turns off.
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3.1.2.3. Display backlight
• Normally the backlight of the display is off.
• When an arrow button on the MMI is pressed, the backlight turns on. If the MMI
panel has not been used for about 5 minutes, the backlight goes off automatically.
• A power saving built-in feature: pressing the [C] button switches the backlight
off within 20 seconds.
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STARTREADY TRIP
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STARTREADY TRIP

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1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
3.1.2.4. How to adjust display contrast
Contrast of the display is automatically adjusted depending on the ambient temper-
ature. To obtain optimum readability, the contrast can be adjusted manually. To
change the contrast, the LCD display must be in idle mode.
• To increase contrast, hold the [E] button pressed and use simultaneously the [↑]
button for adjusting.
• To decrease contrast, hold the [E] button pressed and use simultaneously the [↓]
button for adjusting.
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The selected contrast tuning value is not stored. After power-off cycling of the relay
the contrast setting automatically returns to the factory preset value.
3.1.3. How to use push-buttons
The MMI includes push-buttons for manoeuvring the protection relay.
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• A touch on the arrow button up [↑] or down [↓] is interpreted as one step upward
or downward in a menu or as the minimum step up or down in the setting mode of
parameters.
• If the display shows the first item of a menu, pressing the [↑] button does not
affect the display at all; use the [↓] button instead. Correspondingly, if the display
shows the last item of a menu, push the [↑] button to move in the menu again.
• The right arrow button [→] is used for entering a subordinate menu from a higher
menu level and the left arrow button [←] for returning to a higher menu level
from a subordinate menu.
• In addition, the MMI includes buttons [C] (cancel, clear) and [E] (enter). A more
detailed description of the push-buttons and their functions is found in the
following table.
Butt
Eand
Push
increase
decrease
C
E
down
left
up
right
Navigation push-buttons Clear and Enter buttons
Clear/Cancel
Enter/Exit

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
11
3.1.4. How to select language
The protection relay allows you to choose among several different languages. The
default language is English. For selectable languages, see the picture below.
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1. Press an arrow button to access the Main Menu.
2. Select “Configuration” in the Main Menu and “Language” in the Group Menu.
3. Press the [→] button to enter the currently valid language.
Table 3.1.3-1 Button navigation
Desired step or operation Push-button Action
Step downward in the main menu or a submenu ↓
Step upward in the main menu or a submenu ↑
Entering a submenu from the main menu or a higher sub-
menu →
Leaving a submenu for the main menu or a higher sub-
menu ←
Cancelling, leaving setting mode without saving new val-
ues, returning the MMI to idle mode C
Increasing a value in setting mode ↑
Decreasing a value in setting mode ↓
Moving the cursor in setting mode ←/ →
Entering setting mode or leaving setting mode with storing
of value E
Resetting indicators, memorized values and output con-
tacts C & E Press > 0.5 s
Resetting indicators, outputs and registers C
Resetting indicators and output contacts C Press 5 s
Note!
Thedisplaymust
in idle mode.
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Main Menu Group Menu Parameter Menu
Confirm
Cancel
MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
CONFIGURATION
FUNCTION TEST/BI
COMMUNICATION
LANGUAGE
FREQUENCY
NOMINAL VOLTAGE
CONFIGURATION
ENGLISH
SVENSKA
SUOMI
DEUTSCH
FRANCAIS
ITALIANO
ESPANOL

12
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
4. Press the [E] button and the second row starts to flash indicating that it is
allowed to set language.
5. Move to the desired language and confirm the selection by pressing the [E] but-
ton. The selected language is shown on the display. In case power disappears,
the saved value will remain active.
6. Press the [C] button to return the MMI to idle mode.
By pressing the [C] button before confirming the selection the former language
remains active and the display returns to view mode. Pressing the [C] button once
more returns the display to idle mode.
3.1.5. Main menu
The main menu contains 5 main groups:
• MEASUREMENTS
• RECORDED DATA
• SETTINGS
• CONFIGURATION
•INFO
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• To navigate between the main menu groups, use the [↑] and [↓] buttons. Note that
it is not possible to step from the last menu item over to the first item with a press
of the [↓] key; to move backwards in the menu you have to use the [↑] button.
• To return the display to idle mode press the [C] button.
3.1.6. Submenu
The menu structure contains several subgroups. The name of the main menu group
is always shown on the first row. The second row contains the name of the parameter
and the parameter value or just the parameter value, which in that case is also the
parameter name.
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1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
13
• To enter a submenu, press the [→] button; to exit press the [←] button.
• Press the [C] button to return to idle mode.
• To navigate between these main levels in the submenus, use the [↑] or [↓] button.
Note that, in the menus, it is not possible to step from the last menu item over to the
first item with a press of the [↓] key; to move backwards in the menu you have to
use the [↑] button.
3.1.7. How to switch between front and rear connectors
The relay is provided with two serial connectors: the rear connector RS-485 and the
front optical PC-connector. The rear RS-485 is the default connector. To be able to
switch between the rear and front connectors you have to use the Front/Rear selec-
tor of the MMI:
1. Select “Communication” under the main menu group “Configuration”.
2. Move to the currently used setting (Rear connection/Front connection) and press
the [E] button. The lower row starts to flash.
3. Select the desired setting with the [↑] or [↓] key and press the [E] button to con-
firm the selection.
Note that after about 5 minutes’ time-out the communication is switched to the rear
connector.
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3.2. MMI operation levels
3.2.1. Main level
The main level of the MMI consists of a user level and a technical level. The user
level is for measurements and monitoring, whereas the technical level is used for
advanced protection relay setting and demands a password. In the factory default
settings the password is not active and the value is “999”.
3.2.2. User level
3.2.2.1. Menu groups of the user level
The user level contains three menu groups:
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Main Menu Group Menu Parameter Menu
Confirm
Cancel
MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
CONFIGURATION
FUNCTION TEST/BI
COMMUNICATION
LANGUAGE
FREQUENCY
NOMINAL VOLTAGE
CONFIGURATION
SPA-ADDRESS :xxx
BAUD RATE :x.x
COUNTER :xxx
PASSWORD SPA :xxx
PASSWORD MMI :xxx
REAR CONNECTION

14
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
• MEASUREMENTS = monitors measured values
• RECORDED DATA = saved alarm event values from protection stages
• INFO = information on the relay, e.g. relay name, serial number
Data of every menu group on the user level can be monitored without a password.
3.2.2.2. How to monitor measured values
1. Press the [→] key in the menu group “Measurements” to see the momentary
measured value on that specific phase.
2. Use the [↑] and [↓] buttons for monitoring the other measured values.
3. Press the [→] button once more to see the corresponding primary value.
4. Press the [C] button to return the MMI to idle mode.
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Measured current and voltage are shown as percentages of the rated current Inand
voltage Unof the energizing inputs.
3.2.2.3. How to monitor recorded data
Content of the event register is read via the main menu group “Recorded data”.
1. Choose “Recorded data” in the Main Menu and press the [→] button to enter the
first event.
2. To navigate between the events, use the [↑] and [↓] buttons.
3. To enter or exit a submenu, use the [→] or [←] button.
4. To return the MMI to idle mode, press the [C] button.
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Main Menu Parameter Menus
MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
MEASUREMENTS
up
down
Cancel
MEASUREMENTS
left right

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
15
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3.2.2.4. INFO
The main menu group “Info” contains information about the relay, such as relay
type, software and hardware numbers and serial number. Use the data of this menu,
e.g., when you need to order service.
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3.2.2.5. Alarms
In case of an alarm from protection stages, the text ALARM appears on the display
along with the function. The start and/or the trip indication LED will also be lit.
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MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
RECORDED DATA
1. EVENT
2. EVENT
3. EVENT
4. EVENT
5. EVENT
NUMBER OF STARTS
RECORDED DATA
REJ 527
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Main Menu Parameter Menu
Cancel
MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO

16
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
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Thenon-latchingoperationmodeselected,the operationindicationdisappearsalong
with the fault. When the indication is selected to be latching, it remains even if the
fault disappears. Reset latching indications as follows:
• To clear the alarm text and indication LEDs, press the [C] button. If the fault has
disappeared, the message will be cleared; if not, the fault is stable and the alarm
text will remain on the display.
If several protection functions trip within a short time, the indication of the first
tripping remains on the display until the time determined by the “New trip
indication” setting value has expired. After this, a new trip indication displaces the
old one.
3.2.2.6. Self-supervision, IRF
When theself-supervision system detects a permanent internal relay fault, the ready
indication LED starts blinking. At the same time the IRF relay that is normally
picked up drops off and a fault code appears on the display. During an internal fault
all other output contacts are blocked.
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The fault code is a number that identifies the fault type. Record the code and state it
when ordering service. Fault codes are listed in the following table.
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Table 3.2.2.6-1 Fault codes
Fault code Type of fault
4 No response on output contact test, PO1
5 No response on output contact test, PO2
6 No response on output contact test, SO1
7 No response on output contact test, SO2
30 Faulty program memory
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STARTREADY TRIP
INTERNAL FAULT
FAULT CODE :56

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
17
1) May be corrected by formatting to factory setting.
3.2.3. Passwords
There are two passwords: one for the MMI and one for SPA communication.
The MMI password protects all user-changeable values from being changed by an
unauthorized person. The default value for the MMI password is “999” and for the
SPA password “001”. With the default value “999” the MMI password is not active
and it is not required for altering parameter values.
The passwords can be changed but not read from a remote unit. The SPA password
is changed via the serial bus by entering first the current password in parameter
V160, and writing then a new password to parameter V161. The MMI password can
be changed via parameter V162. For changing the MMI password, see also section
3.2.4.3. Configuration.
As soon as the MMI password is changed from the default “999”, the password will
be required for altering parameter values. Once the password is given, it will not be
required again until the MMI returns to idle state.
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3.2.4. Technical level
3.2.4.1. Menu system of parameters
The interactive communication between the operator and the MMI is based on
menus. Press an arrow button to activate the Main Menu. Everyone has the access
to view all the parameters, even the MMI password if the default password is in use.
In case the password is changed from the default “999”, it will remain hidden until
the valid MMI password is given.
The views are used for reading setting parameters, measured values, etc. The
parameters are divided into two main groups:
• SETTINGS
50, 59 Faulty work memory
51, 52, 53, 54, 56 Faulty parameter memory 1)
55 Faulty parameter memory
131, 139, 195, 203, 222, 223 Internal reference voltage error
253 Error in measuring unit
Table 3.2.2.6-1 Fault codes
Fault code Type of fault
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STARTREADY TRIP
Passwd
SETTINGS
PASSWORD :000

18
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
• CONFIGURATION
3.2.4.2. How to change settings
Actual settings are found in the first submenu, and they are not editable. Actual
settings consist of settings either of group 1 or 2, depending on which of these are
selected to be active. Settings of group 1 and 2 can be edited in the setting mode; see
the instructions later in this section.
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Both the setting groups have their related registers. Switching between the setting
groups 1 and 2 enables changing a whole group of settings atthesame time. You can
switch between the setting groups 1 and 2 in three different ways:
1. by selecting “Group 1/Group 2” under the main menu group “Settings”
2. with a binary input signal BI
3. with the command V150 via serial communication bus.
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When a large number of setting values is to be altered, e.g. during commissioning of
relay systems, it is recommended that you use a personal computer provided with
the necessary software.When these are not available or when only a few settingsare
to be altered, proceed as follows:
1. Select the main menu group “Settings”, and further the “Protect.stages”. Press
the [→] button to enter the actual settings.
2. Use the arrow button [↓] to select the setting to be changed and press the [→]
button.
3. Enter the setting mode by pressing the [E] button. If the default password has
been changed, the text PASSWORD appears on the display and you have to give
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MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
CBFP
SETTINGS
PROTECT. STAGES
SGF
SGB
SGR
GRPOUP 1 /GROUP 2
SETTINGS
NEW TRIP IND.
Edit/Confirm
Cancel
GRP2 Io> : x.xx
SETTINGS
*GRP1 Io> : x.xx
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ϕb :-x°
ϕc:x°
Io> : x.xx%
GrS527
SETTINGS SETTINGS
*GRP 1 Io> : x.xx Cancel
Confirm
GRP 2 Io> : x.xx
Submenu Parameter Menu
C
E

1MRS 751055-MUM Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
19
the password. If the default password “999” is still valid, no password is
required.
4. The first digit or character of the setting value/text of the concerned parameter
starts flashing; in case of an enumerator the entire text is flashing. Use the [→]
and [←] buttons to move the cursor and the [↑] and [↓] buttons to increase or
decrease the number.
5. To store a new value, push the [E] button. If the parameter is of numeric type the
LCD display confirms the storage by showing “---” on the display. If a setting
value beyond the allowed limits is confirmed in the setting mode, the former
value is restored and remains unchanged.
6. To exit the setting mode without saving changes, press the [C] button once
before confirming and the display returns to view mode. Press the [C] button
once more and the display returns to idle mode.
3.2.4.3. Configuration
Parameters under “Configuration” are basically parameters the customer usually
sets only once. These parameters are not related to the protection functions.
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To alter a parameter, proceed as follows:
1. Select the main menu group “Configuration” and enter the desired parameter by
using the arrow buttons.
2. Enter the setting mode by pressing the [E] button. If the default password has
been changed, the text PASSWORD appears on the display and you have to give
the password. If the default password “999” is still valid, no password is
required.
3. The first digit or character of the setting value/text of the concerned parameter
starts flashing; in case of an enumerator the entire text is flashing. Set the digit/
character by using the [↑] and [↓] buttons. The next digit/character to be set is
activated by pressing the [→] or [←] button; when setting an enumerator type of
parameter, the left and right arrows have no function.
4. To store new values, press the [E] button. If the parameter is of numeric type the
LCD confirms the storage by showing “---” on the display. If a setting value
beyond the allowed limits is confirmed in the setting mode, the former value is
restored and remains unchanged.
Conf527
E
C
CONFIGURATION
SPA-ADDRESS :xxx
PASSWORD SPA :xxx
PASSWORD MMI :xxx
REAR CONNECTION
Main Menu Group Menu Parameter Menu
MEASUREMENTS
RECORDED DATA
SETTINGS
CONFIGURATION
INFO
CONFIGURATION
FUNCTION TEST/BI
COMMUNICATION
LANGUAGE
FREQUENCY
BAUD RATE :x.x
COUNTER :xxx
Confirm
Cancel
NOMINAL VOLTAGE

20
1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
5. To exit the setting mode without saving changes, press the [C] button once
before confirming and the display returns to view mode. Press the [C] button
once more and the display returns to idle mode.
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3.2.4.4. How to acknowledge and reset indicators, outputs and registers
The [C] button is used for acknowledging and resetting indicators, outputs and
registers as follows:
• To clear the LEDs and the LCD display, press the [C] button. The LEDs and the
LCD are cleared only if the fault situation has disappeared.
• Press the [C] button for at least 5 seconds to unlatch the output contacts. Note that
the LEDs and the LCD display have to be cleared before this (idle mode).
• Press the [C] and [E] buttons simultaneously for at least 5 seconds to clear
recorded data, registers and recorder data and to reset latched relays. The LCD
display being inverted confirms this action.
E
C
Confirm
Cancel
Parameter Menu
CONFIGURATION
PASSWORD HMI :xxx