M541 Mitsubishi, M541 Datasheet

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M541

Manufacturer Part Number
M541
Description
EARTH LEAKAGE CURRENT DETECTOR
Manufacturer
Mitsubishi
Datasheet

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DESCRIPTION
The M54122L is a semiconductor integrated circuit with amplifier
for a high-speed earth leakage circuit breaker.
FEATURES
APPLICATION
High speed earth leakage circuit breaker
FUNCTION
The M54122L circuit for the amplifying parts of earth leakage
circuit breaker consists of differential amplifier, latch circuit and
voltage regulator. It is connected to the secondary side of the zero-
current transformer (ZCT) which detects leakage current in the
both input of the differential amplifier. Signals amplified by
differential amplifier are integrated by an external capacitor, and
connects to the input terminal of latch circuit with output suitable for
the characteristics of high-speed earth leakage circuit breaker.
Latch circuit keeps low in the output till the input voltage reaches
the fixed level, and output becomes high when the leakage current
more than fixed flows. It drives a thyristor connected to the output
terminal of latch circuit.
BLOCK DIAGRAM
Suitable for JIS C 8371
Good temperature characteristics of input sensitivity current
High input sensitivity (V
Low external component count
High noise and surge-proof
Low power dissipation (P
as 100V and 200V.
High mounting density by SIL package with 8 pins
Wide temperature range (Ta = -20 – +80 C)
GND
V
S
8
3
T
= 13.5mV Typ.)
d
Reference
= 5mW Typ.) and may be used both
voltage
V
1
R
Input
IN
2
Differential
amplifier
output
O
4
AMP
D
PIN CONFIGURATION (TOP VIEW)
Terminal for noise absorption
Differential amplifier output
EARTH LEAKAGE CURRENT DETECTOR
Latch
input
S
MITSUBISHI <CONTROL / DRIVER IC>
Reference voltage
5
C
Latch input
Output
noise absorption
Input
Terminal for
N
6
GND
R
O
N
O
V
S
V
IN
R
D
C
R
S
S
1
2
3
4
5
6
7
8
Outline 8P5
AMP
M54122L
7
LATCH
O
REG
S
output

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M541 Summary of contents

Page 1

... APPLICATION High speed earth leakage circuit breaker FUNCTION The M54122L circuit for the amplifying parts of earth leakage circuit breaker consists of differential amplifier, latch circuit and voltage regulator connected to the secondary side of the zero- current transformer (ZCT) which detects leakage current in the both input of the differential amplifier ...

Page 2

... and shorting between them considered as a good one if standard value high-level considered as a good one in the standard value of supply voltage and in the low-level S MITSUBISHI <CONTROL / DRIVER IC> M54122L EARTH LEAKAGE CURRENT DETECTOR Ratings 8 250 30 -250 250 30 ...

Page 3

... V IN GND “OFF” Open 100 0.047 0.047 MITSUBISHI <CONTROL / DRIVER IC> M54122L EARTH LEAKAGE CURRENT DETECTOR GND TD1 100 0.047 ...

Page 4

... Supply voltage V V voltage generates by the constant voltage circuit in IC. CC This is measured not by M54122L but by a special element. Reference voltage vs. supply voltage 2.5 2.0 1.5 1.0 0 Supply voltage V Differential amplifier output voltage vs. differential input voltage ...

Page 5

... O output voltage V ( MITSUBISHI <CONTROL / DRIVER IC> EARTH LEAKAGE CURRENT DETECTOR Operating time vs. ambient temperature 4.5 4 3.5 3 2.5 2 -50 1.8 -25 Ambient temperature T Trip voltage vs. ambient temperature -50 -25 Ambient temperature T M54122L 100 ( 100 ( C) a ...

Page 6

... APPLICATION EXAMPLE • HIGH-SPEED LEAKAGE CIRCUIT BREAKER WITH M54122L Supply voltage circuit Trip coil line GND Note 8 : Gate current must be selected. Please select voltage resistance by AC supply voltage Core Series by Soryo Denshi Kagaku Co., Ltd (Mitsubishi Subsidiary) Supply voltage circuit is connected as a previous diagram. Please ...

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