Lapse relays type B type | Frer

The X...DB3 series earth leakage relays Type B are designed to measure the DC, AC and high frequency leakage current. Thanks to their distinctive feature (the displaying of the leakage current) it is possible to continuously monitor the insulation state and to program the preventive maintenance in order to avoid unexpected power breaks.

Main functions:

Display	Multicolor backlight LCD
Maximum indication	3 digits
Dot point position	Automatic
Bargraph	10 levels
Residual current measurement IΔ	Type B - TRMS
Display refresh	500ms (average value)
Measurement bandwidth	DC; 2,5Hz – 10kHz
Base precision	±0,5%
Selectable antibrillation LPF	IEC 62423, VDE 0664-T-100 fire protection 300mA
Selectable 3rd harmonic LPF	Attenuation 80% @ 150Hz
Residual actuating current setting IΔn	30mA ÷ 500mA; 300mA ÷ 5A;
Residual non-actuating current setting IΔno	80% - 98% IΔn
Residual actuating current setting IΔnDC (DC component)	5% - 100% IΔn DC (min. 6mAdc)
Limiting non-actuating time setting Δtno	Istantaneous 20ms – 30s
Selectable inverse time-current characteristic	Istantaneous IΔn = 30mA Selective 60ms IΔn > 30mA Delayed 20ms – 30s IΔn > 30mA
Selectable constant time-current characteristic	Istantaneous 20ms IΔn = 30mA Delayed 20ms – 30s IΔn > 30mA
Trip contact	SPDT (COM, NO, NC)
Nominal load	6A, 250VAC AC1; 6A, 24VDC DC1 3A, 250VAC AC15; 2A, 24VDC DC13 (IEC60947-5-1)
Safety	Standard (ND) or positive (NE)
Insulation and safety	IEC 61010-1, IEC 60947-1
Operating temperature	0…+50˚C
Storage temperature	-30˚C…+70˚C
self estinguishing thermoplastic material	UL 94-V0
Protection degree for housing	IP20
Protection degree for terminals	IP20
According to	EN 62423 (2013)

Additional technical data

Automatic sensor connection test	Voltage pulse
Alarm (option)	SPDT (COM, NO, NC) – Standard X72DB3 SPST (COM, NO) – Optional X35DB3/X48DB3
Alarm setting	OFF - 5÷100% IΔn
Activation delay	as Trip - 20ms÷30s
Release delay	LATCH - 20ms÷30s
Special functions	Reclose; 2nd Trip and IΔnDC; LSO (Logic Selectivity Output)
Relay nominal load	6A, 250Vac AC1; 6A, 24Vdc DC1 3A, 250Vac AC15; 2A, 24Vdc DC13 (IEC60947-5-1)
Photo-mos nominal load	100mA, 250Vac/dc (CAT II) – 150Vac/dc (CAT III) 350Vpk (including overvoltage)
Safety	Standard (ND) or positive (NE)
Test-Reset Input (option)	Command > 2s; LSI (Logic Selectivity Input)
Modbus RTU (option)	RS485 insulated, A+, B-
Baud Rate	9600, 19200, 38400, 57600 bit/s
Programmable parameters	Parity and Stop bits
Programmable address	1 ÷ 247
Scope function	120 samples (12bit) with amplitude and time scales
Real  Time Clock (option)	RTC with Battery backup
Archive event store	last 10 events, with Timestamp

Type		X _ _ D B 3	_ _ _	_ _ _	_	_
Dimensiona	2 mod. DIN	X 3 5 D B 3
	48x48mm	X 4 8 D B 3
	72x72mm	X 7 2 D B 3
Nominal Frequency	DC [&] 50-60 Hz		4 D C
	DC [&] 400 Hz		Q D C
Options	Test-Reset Input  (X35…-X48…)			R 1 0
	RS485 Modbus RTU            (X35…-X48…)			M 1 0
	Phot-mos Alarm          (X35…-X48…)			X 1 L
	Rele Alarm (X35…-X48…)			X 1 1
	Test-Reset Input  (X72…)			R 1 1
	RS485 RTU + Test-Reset Input             (X72…)			B 1 1
Auxiliary supply voltage	230V AC                ±10%; 3VA				2
	20 – 60V AC/DC      <4VA/2,5W				L
	80 – 260V AC/DC    <6,5VA/2,5W				H
Real Time Clock	No
	Yes					C

Dimensions

X35DB3	X48DB3
X72DB3

Diagrams

Connection diagram X35DB3 – X48DB3
Connection diagram X72DB3

Presentation of signaling operation with different colors of the screen backlight

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The meaning of icons on the display