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ABB REJ 525 Combined Overcurrent and Earth-Fault Relay
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ABB REJ 525 Combined Overcurrent and Earth-Fault Relay
ABB REJ 525 Combined Overcurrent and Earth-Fault Relay
Introduction
About this manual
This manual provides the user with basic information on the combined overcurrent and earth-fault relay REJ 525 and presents detailed instructions on how to use the Human-Machine Interface (HMI) of the relay, also known as the Man-Machine
Interface (MMI). In addition to the instructive part, a short chapter on the service of
the relay has been included.
Interface (MMI). In addition to the instructive part, a short chapter on the service of
the relay has been included.
The REJ 525 is intended for three-phase overcurrent protection and non-directional earth-fault protection in medium voltage distribution networks but can also be used for protection of generators, motors and transformers.
The REJ 525 can also be used in applications requiring single- or two-phase
overcurrent protection.
The REJ 525 can also be used in applications requiring single- or two-phase
overcurrent protection.
The REJ 525 is based on a microprocessor environment. A self-supervision system continuously monitors the operation of the electronics and the software. The HMI includes a Liquid Crystal Display (LCD) which makes the local use of the relay safe and easy. Local control of the relay can be carried out using a portable computer connected to the front connector and remote control via the rear connector connected to the distribution automation system through the serial interface and the fibre-optic bus.
Features
• Three-phase low-set overcurrent stage with definite-time or inverse definite
minimum time (IDMT) characteristic
• Three-phase high-set overcurrent stage with instantaneous or definite-time
characteristic
• Phase discontinuity protection
• Low-set non-directional earth-fault stage with definite-time or IDMT
characteristic
• High-set non-directional earth-fault stage with instantaneous or definite-time
characteristic
• Circuit-breaker failure protection unit (CBFP)
• Disturbance recorder
• recording time up to 10 seconds
• triggering by a start or a trip signal from any protection stage and/or by a binary
input signal
• records four analogue channels and up to eight user-selectable digital channels
• adjustable sampling rate
• Non-volatile memory for
• up to 60 event codes
• setting values
minimum time (IDMT) characteristic
• Three-phase high-set overcurrent stage with instantaneous or definite-time
characteristic
• Phase discontinuity protection
• Low-set non-directional earth-fault stage with definite-time or IDMT
characteristic
• High-set non-directional earth-fault stage with instantaneous or definite-time
characteristic
• Circuit-breaker failure protection unit (CBFP)
• Disturbance recorder
• recording time up to 10 seconds
• triggering by a start or a trip signal from any protection stage and/or by a binary
input signal
• records four analogue channels and up to eight user-selectable digital channels
• adjustable sampling rate
• Non-volatile memory for
• up to 60 event codes
• setting values
Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
• disturbance recorder data
• recorded data of the five last events with time stamp
• number of starts for each stage
• alarm indication messages and LEDs showing the status at the moment of
power failure
• maximum pickup currents
• Four accurate current inputs
• Galvanically isolated binary input with a wide input voltage range
• All settings can be modified with a personal computer
• HMI with an alphanumeric LCD and manoeuvring buttons
• IEC 60870-5-103 and SPA bus communication protocols
• Two normally open power output contacts
• Two change-over 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 electronics and software. In the event of an internal relay fault
(IRF), all protection stages and outputs are blocked.
• User-selectable rated frequency 50/60 Hz
• User-selectable password protection for the HMI
• Display of primary current values
• Demand values
• Multi-language support
• recorded data of the five last events with time stamp
• number of starts for each stage
• alarm indication messages and LEDs showing the status at the moment of
power failure
• maximum pickup currents
• Four accurate current inputs
• Galvanically isolated binary input with a wide input voltage range
• All settings can be modified with a personal computer
• HMI with an alphanumeric LCD and manoeuvring buttons
• IEC 60870-5-103 and SPA bus communication protocols
• Two normally open power output contacts
• Two change-over 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 electronics and software. In the event of an internal relay fault
(IRF), all protection stages and outputs are blocked.
• User-selectable rated frequency 50/60 Hz
• User-selectable password protection for the HMI
• Display of primary current values
• Demand values
• Multi-language support
Guarantee
Please inquire about the guarantee with your nearest ABB representative.
Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
Instructions
HMI features
Front panel
The front panel of the protection relay includes:
• an alphanumeric 2 x 16 characters’ LCD with backlight and contrast control
• three indicator LEDs (ready, start, trip)
• an HMI push-button section with four arrow buttons and buttons for clear and
enter
• an optically isolated serial communication port
• three indicator LEDs (ready, start, trip)
• an HMI push-button section with four arrow buttons and buttons for clear and
enter
• an optically isolated serial communication port
1. LCD
2. Optical PC-connector
3. HMI push-button section
4. Indicator LEDs:
• Left: Ready (green)
• Centre: Start (yellow)
• Right: Trip (red)
2. Optical PC-connector
3. HMI push-button section
4. Indicator LEDs:
• Left: Ready (green)
• Centre: Start (yellow)
• Right: Trip (red)
Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
Display
Display test at power-up
When the auxiliary voltage is connected to the relay:
1. The backlight will be turned on after the relay has performed the internal power-up tests and entered the protection mode.
2. The display will be tested by inverting it for a short time.
3. The display will be returned to the idle mode, and the backlight turned off. However, if the non-volatile function is active, a message shown on the display before the auxiliary voltage was disconnected will reappear on the display.
Display idle mode
When the relay is in the idle mode, the station name will be displayed, which by
default is “- ABB -”. To change the station name, use SPA parameter M20.
default is “- ABB -”. To change the station name, use SPA parameter M20.
Display backlight
• Normally the backlight of the display is off.
• The backlight is turned on at the touch of an arrow button on the HMI. If the HMI
panel has not been used for approximately five minutes, the backlight will be
turned off automatically.
• A power-saving built-in feature: pressing the [C] button will turn the backlight off
within 20 seconds.
• The backlight is turned on at the touch of an arrow button on the HMI. If the HMI
panel has not been used for approximately five minutes, the backlight will be
turned off automatically.
• A power-saving built-in feature: pressing the [C] button will turn the backlight off
within 20 seconds.
Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
How to adjust the display contrast
The display contrast is dependent on the temperature. The REJ 525 automatically
adjusts the contrast for optimum readability. The contrast can also be adjusted
manually. To adjust the contrast, the display must be in the idle mode.
adjusts the contrast for optimum readability. The contrast can also be adjusted
manually. To adjust the contrast, the display must be in the idle mode.
• To increase the contrast, hold down the [E] button and adjust using the [↑] button.
• To decrease the contrast, hold down the [E] button and adjust using the [↓]
button.
• To decrease the contrast, hold down the [E] button and adjust using the [↓]
button.
After power-up of the relay, the factory default value of the display contrast will
automatically be restored.
automatically be restored.
How to use the push-buttons
The HMI includes push-buttons for manoeuvring the relay.
The navigation buttons are used to view, select and edit desired menu items. To
move between the menu items, use the arrow buttons. The item to be edited is
selected and the value stored by pressing the [E] button. To increase or decrease the
activated digit and to shift the activated decimal point, use the [↑] and [↓] buttons.
To cancel and return the HMI to the idle mode, press the [C] button.
move between the menu items, use the arrow buttons. The item to be edited is
selected and the value stored by pressing the [E] button. To increase or decrease the
activated digit and to shift the activated decimal point, use the [↑] and [↓] buttons.
To cancel and return the HMI to the idle mode, press the [C] button.
How to select language
The REJ 525 allows you to choose among several different languages. The default language is English. For selectable languages, see the picture below.
1. Press an arrow button to access the main menu. CONFIGURATION ENGLISH SVENSKA SUOMI DEUTSCH FRANÇAIS ITALIANO ESPAÑOL Confirm E Cancel C
2. Select “CONFIGURATION” in the main menu and “LANGUAGE” in the group menu.
3. Press the [→] button to enter the currently valid language. LangSel
4. Press the [E] button. The second line will start to flash, indicating that it is allowed to set the language. A password will be required depending on the state of the password protection.
5. Move the cursor to the desired language and confirm the selection by pressing the [E] button. The selected language will be shown on the display.
6. Press the [C] button to return the HMI to the idle mode. By pressing the [C] button before confirming the selection, the former language will remain active, and the display will be returned to the view mode. Pressing the [C] button again will return the display to the idle mode.
REJ 525 Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
• Lit indicator:
A protection stage has started. The start indication can be selected to be latching
or non-latching with the SGF switches. A non-latching indication will
automatically be cleared when the fault has disappeared and the protection stage
has been reset, whereas a latching indication will remain lit until manually
cleared.
or non-latching with the SGF switches. A non-latching indication will
automatically be cleared when the fault has disappeared and the protection stage
has been reset, whereas a latching indication will remain lit until manually
cleared.
• Blinking indicator:
Starting protection stages have been blocked by an external binary input signal. The blocking indication is non-latching, i.e. it will disappear with the binary input signal. The START indicator LED will continue blinking for as long as a protection stage remains blocked. The blocking indication will disappear with the binary input signal or when the protection stage is no longer starting. If a protection stage is blocked when other protection stages are starting, the indicator will continue blinking. (Blocking has a higher priority than starting.)
Red indicator LED
TRIP indicator
• Indicator off:
5HGLQGLFDWRU/('
No protection stage has tripped.
• Lit indicator:
Red
A protection stage has tripped. The trip indication is latching, i.e. it will remain
lit until manually cleared
• Indicator off:
5HGLQGLFDWRU/('
No protection stage has tripped.
• Lit indicator:
Red
A protection stage has tripped. The trip indication is latching, i.e. it will remain
lit until manually cleared
Indication messages
The messages give an overview of protection operations and internal protection
relay faults.
relay faults.
Alarm indication messages
In case of a start or a trip of a protection stage, the text “ALARM” will appear on the display along with the name of the function. Additionally, in case of a latching start or trip indication, the name of the energising input(s) which caused the fault will be displayed. The START indicator LED and/or the TRIP indicator LED will also be lit.
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