Schrack Technik BXFIA101 Series Operating Manual

EARTH LEAKAGE RELAYS
BXFIA101--
OPERATING MANUAL
Edition 11.24
made in Italy
1. SAFETY PRECAUTIONS
WARNING, PLEASE READ THE FOLLOWING NOTES
The following general safety precautions must be observed during all phases of installation and operation of this
instrument. Improper use may affect safety.
• Installation and operation of this instrument can be performed by qualified personnel only and according to
the relevant Standards.
• Servicing can be performed by manufacturer only.
• Before installing the instrument make sure that the housing is not damaged, otherwise the unit must be
rejected and returned to the Factory for servicing.
• Ensure that the line and auxiliary power supply are switched off before connecting the instrument to the circuits.
• Wiring diagrams must be respected according to the required model.
• Make sure to operate the instrument according to the technical specifications as listed in this Manual.
• Do not operate the instrument in an explosive atmosphere and in presence of flammable liquids or vapors.
• The operating conditions must be in the range as specified in this Manual and on the instrument label.
• Never attempt to open the instrument's housing for any reason.
• To clean the equipment use a dry cloth, soft and non-abrasive. Do not use water or any other liquids, acids,
chemical solvents or organic substances.
• The device is of overvoltage category III (CAT III, 300V) and it is intended to be installed inside boxes or electric
panels with CAT III, 300V supply and control circuits.
• The wires to be connected to the terminals have to have a maximum operating temperature at least at 75°C and
the wire section must be 0.75÷2.5 mm 2 .
• It must be provided an external disconnecting and protection device for the auxiliary supply with rated voltage
suitable to the system voltage value and breaking capacity suitable to the short circuit current available at the in-
sertion point (e.g. external fast or ultrafast fuses with 1A or 2A rated current, 10x38, ceramic body, 500V or 660V
rated voltage, gG or FF characteristic and 100KA breaking capacity); the device must be immediately identifiable
as the product disconnecting device, easy to reach and installed in the immediate vicinity of the instrument; it
must be approved and certified according to the required standards.
• It must always be used differential current transformers with reinforced insulation between primary and secon-
dary windings, according to the power circuit overvoltage category.
• In case of short circuit or earth fault of the controlled circuit, always verify the correct operation of the Relay.
• Periodically verify the correct operation of the Earth Leakage Relay, by pressing TEST key.
• Failure to comply with these precautions and with the instructions given elsewhere in this Manual violates
safety standards of design, manufacture, and intended use of this instrument.
SCHRACK assumes no liability for the Customer's failure to comply with these requirements.
WARNING RISK OF ELECTRIC SHOCK
DANGEROUS VOLTAGE MAY BE PRESENT ON THE TERMINALS MARKED WITH THIS SYMBOL !
2. DISPLAY
Automatic trip retry & Inverse time current curve
Positive safety & Low pass filter
FIRST ROW - Residual current measure
SECOND ROW
Frequency - Trip delay - Main settings
Bargraph with Trip icon and Alarm
3. DOUBLE-FUNCTION KEYS
4. MODE
5. MEASURE MODE
On the first row is displayed the True RMS value (average 500ms) of the Residual Current IΔ , direct or filtered channel,
according to settings. Visualizations on the second row as indicated in the table below. The bargraph shows the ratio
(IΔ/IΔn) .
LCD SECOND ROW VISUALIZATION
aCi 8.8.8
mA
Fundamental component measure IΔ
fi 8.8.8
Hz
Fundamental frequency measure (leakage current)
ACh 8.8.8
mA
Harmonic component measure IΔh (average 500ms)
fh 8.8.8
Hz
Highest harmonic frequency estimation (leakage current)
thd 8.8.8
%
Total harmonic distortion estimation leakage current
1DP 8.8.8
mA
Current peak detected average (500ms)
IΔn
1dn 8.8.8
Actuating current setting IΔn
mA
Δtn
dtn 8.8.8
Limiting non-actuating time setting Δtno
ms
ARc
Event archive - see chapter 10
CF
G
Configuration - see chapter 8
6. TRIP MODE
RESIDUAL CURRENT TRIP
In case of RESIDUAL CURRENT TRIP on the first row is displayed the True RMS value of the Trip Residual Current, it is
calculated as Joule Integral (I t)/T. Visualizations on the second row as indicated in the table below. The bargraph
2
is fixed at 100% and the Trip icon is on.
LCD SECOND ROW VISUALIZATION
dLy 8.8.8
ms
Trip Delay measure Δt (Relay excluded)
ACi 8.8.8
mA
Fundamental component measure IΔ
fi 8.8.8
Hz
Fundamental frequency measure (leakage current)
aCh 8.8.8
mA
Harmonic component measure IΔh (last 500ms average)
Fh 8.8.8
Hz
Largest harmonic frequency estimation (leakage curr.)
thd 8.8.8
%
Total harmonic distortion estimation (leakage current)
CF
G
Configuration - see chapter 8
TEST OR CT CONNECTION FAILURE TRIP
In case of TEST or CT CONNECTION FAILURE TRIP, on the first row is displayed the tripping cause (Test or C.T.).
Visualizations on the second row as indicated in the table below.
The bargraph is fixed at (0%) and the Trip icon only is displayed.
LCD SECOND ROW VISUALIZATION
man rem 485
Test (manual, remote, RS485)
Opn Shr
CT connection failure (open or short circuit)
Id 8.8.8
mA
Injected test residual current measure
CF
G
Configuration - see chapter 8
NOTE : A red blinking backlight of the display means that the device continues to measure a not zero residual
current, despite the trip contact commutation. Alarm icon is blinking.
It is possible to set a trip contact automatic retry counter and the alarm contact reclose or 2nd trip functions
(see fig. 5). It is possible to configure the installation test execution (with trip contact commutation - TRP) or a
device test (with alarm contact commutation - ALA, or electronic only - ELE).
CONFIGURATION MENU
(average 500ms)
1
Cfg pwd
Configuration Password entry
Cf
G Configuration
Table 1: BASIC Configuration title displayed alternately with the parameter set
BAS 1dn
Basic setting Actuating residual current
RESET
dtn
Limiting non-actuating time Fig.5
Lpf Low pass filter Fig.1
p
pwd
q Password
sav
Save and exit
7. FIRST POWER ON
At first Power on is recommended to properly set all the Basic Configuration parameters:
- LPF: setting of low pass filter
- dir: full bandwidth – offers the maximum level of safety, including high frequencies leakage currents
- af: 10x high frequency attenuation – best compromise for inverter loads
- 3RD: 5x attenuation at 150Hz – offers the highest immunity to false tripping
8. CONFIGURATION MODE
(last 500ms average)
1
After Password input, it is possible to select two configuration modes: Basic, where is possible to program the
main settings only (Table 1), and Full (Table 2).
On the first and second row is possible to scroll the configuration settings, as shown in tables. The bargraph
continues showing the ratio (IΔ/IΔn). In alarm conditions the alarm icon is blinking. Backlight color indicates the
device status. During parameters editing, the device keeps working with previous settings. The new configuration
will be activated only by "save and exit" menù.
USE OF KEYS IN CONFIGURATION MODE
Enter: enter or confirm parameter value modification
ESC (1,5s): escape to upstream level or null parameter value modification
Up and Down arrows: menù browsing and parameter modification
blinking parameter: red values indicates factory setting
CUS 30 100 300 500
mA...
(custom 30mA÷30A)
CUS 300 1 3 510
mA...
(custom 300mA÷300A**)
CUS 1ns * SEL * 100 200 300 400 500
(20 ) (60 )
(custom 20ms÷30s)
dir af
(direct) (antifibrillation)
300 A model or sns H10 setting**
000... 999
p q
bas fuL
p q
(Basic) (Full)
1 3 10 30
A
p q
30 100 300
A
1
ms... s p q
3rd p q
(3 harmonic)
rd
000... 999
p q
(constant time curve)*