1MRS 752179-MUM Earth-Fault Relay REJ 521 Issued: 14.09.98 Operator’s Manual Version: C/15.08.02 Checked: A.S. Approved: L.N. We reserve the right to change data without prior notice. Contents 1. Introduction ................5 1.1. About this manual ................5 1.2. The use of the relay ...............5 1.3.
The REJ 521 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.
(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 • Multi-language support 1.4. Guarantee Please inquire the guarantee of your nearest ABB representative.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual Safety information Dangerous voltages can occur on the connectors, even though the auxiliary voltage has been disconnected National and local electrical safety regulations must always be followed The device contains components which are sensitive to electrostatic...
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual Instructions 3.1. HMI features 3.1.1. 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) •...
)LJ 'LVSOD\ WHVW DW SRZHU XS 3.1.2.2. 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. READY START TRIP )LJ 'LVSOD\ LQ WKH LGOH PRGH 3.1.2.3.
3.1.2.4. How to adjust the display contrast The display contrast is dependent on the temperature. The REJ 521 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.
E and C contacts and memorized values 3.1.4. How to select language The REJ 521 allows you to choose among several different languages. The default language is English. For selectable languages, see the picture below. Parameter Menu Main Menu Group Menu...
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual 3.1.5. Main menu The main menu contains five main groups: • MEASUREMENTS • RECORDED DATA • SETTINGS • CONFIGURATION • INFO READY START TRIP MEASUREMENTS )LJ 7KH GLVSOD\ VKRZLQJ WKH ILUVW PDLQ PHQX JURXS ↑...
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual 1. Select “COMMUNICATION” under the main menu group “CONFIGURATION”. 2. Move the cursor to the currently used setting (“REAR CONNECTION/FRONT CONNECTION”) and press the [E] button. The lower line will start to flash.
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual READY START TRIP SETTINGS PASSWORD )LJ 3DVVZRUG UHTXHVW IRU HGLWLQJ VHWWLQJ SDUDPHWHUV 3.2. HMI operation levels 3.2.1. Main level The main level of the HMI consists of a user and a technical level. The user level is used for measuring and monitoring whereas the technical level is used for advanced protection relay setting and can be configured to demand a password.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual Parameter Menu Main Menu Group Menu MEASUREMENTS MEASUREMENTS MEASUREMENTS In:x.xx A:x.xx Cancel RECORDED DATA SETTINGS CONFIGURATION INFO )LJ 0HDVXUHPHQWV To access measured values by activating the monitoring state: ← 1. Press the [E] and [ ] buttons simultaneously to view the measured value of I 2.
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual Parameter Menu Main Menu Group Menu MEASUREMENTS RECORDED DATA RECORDED DATA RECORDED DATA 1. EVENT 1. I0 In:x.xx 2. EVENT 1. t0> %:xxx Cancel 3. EVENT 1. t0>> %:xxx SETTINGS 1. xx-xx-xx 4.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual 3.2.3.2. How to change settings The actual settings are found in the first submenu and are not editable. These in turn consist of the settings of either group 1 or 2, depending on which one has been selected to be active.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual password. If the default password “999” is still valid, no password will be required. 3. The text or the first digit of the setting value of the parameter to be edited will ↑...
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual 3.2.4. Menu chart - Station name - Note: ABB is the default MEASUREMENTS MEASUREMENTS MEASUREMENTS A:x.xx In:x.xx RECORDED DATA RECORDED DATA RECORDED DATA 1. EVENT 1. I0 In:x.xx 2. EVENT 1. t0>...
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual 3.3. Protection relay indications The operation of the relay can be monitored by means of two different kinds of indications on the HMI: • LED indications: Start, Trip and Ready • A text message on the LCD The basic protection functions are not affected by fault indications.
REJ 521 Earth-Fault Relay 1MRS 752179-MUM 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.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual READY START TRIP ALARM I0>> )LJ $ODUP A latching alarm indication message will remain on the display until manually cleared or until replaced by a message of higher priority. However, if the fault is stable and has not disappeared, the LED(s) will not be cleared.
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REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual READY START TRIP INTERNAL FAULT FAULT CODE :56 )LJ ,QWHUQDO IDXOW The fault codes are listed in the following table. Table 3.3.2.3-1 Fault codes Fault code Type of fault No response on the output contact test, PO1...
It can also be used for protection of generators, motors and transformers. The whole function software used in the relay is preloaded into the program memory at the production stage. The operation and the features of the REJ 521 are explained in detail in the Technical Reference Manual.
Please contact the manufacturer or the nearest representative for further information about checking, overhaul and recalibration of the relay. When contacting ABB for ordering service, please give a description of the fault and state the possible fault code. 1RWH...
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual The table below shows the activation order and the corresponding digit flashing when a signal is being tested. Table 5.2.1-1 Function test Number Function > > >> >> 5.2.2. Binary input test To monitor the status of the binary input, navigate in the HMI menu as follows: 1.
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REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual To enable secondary testing, the relay has to be disconnected, either by disconnecting the terminal blocks or by fitting a test plug on the relay. Danger! Do not open the secondary circuit of a current transformer during any phase of the testing when the primary circuit is live.
Earth-Fault Relay REJ 521 1MRS 752179-MUM Operator’s Manual 5.3.1. Testing of the earth-fault measuring transformer Select the same rated current as in the application. Before the test is started: • Record the currently used SGR settings for later restoring. • Set the relay switchgroups as follows: Table 5.3.1-1...
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual Operate time Set the test current to 2 x the setting value of stage I >>. Switch off S1, clear the indicators and unlatch the output contacts. The clock is started by closing switch S1 and stopped by closing output contact PO2.
REJ 521 Earth-Fault Relay 1MRS 752179-MUM Operator’s Manual Customer feedback Date: To fax: +358 10 224 1080 Category: Comment Query Complaint In case of feedback related to a specific product, please state the name of the product. Product: Description: Initiator:...