Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS User manual
- Type
- User manual
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS
Product Information
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are designed to protect electrical circuits from damage caused by earth leakage currents. They are suitable for use in a wide range of applications, including residential, commercial, and industrial.
Features
- High sensitivity: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are highly sensitive, which means that they can detect even small earth leakage currents. This helps to prevent electrical fires and other hazards.
- Fast response time: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS have a fast response time, which means that they can quickly trip the circuit in the event of an earth leakage fault. This helps to minimize damage to electrical equipment and property.
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS
Product Information
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are designed to protect electrical circuits from damage caused by earth leakage currents. They are suitable for use in a wide range of applications, including residential, commercial, and industrial.
Features
- High sensitivity: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are highly sensitive, which means that they can detect even small earth leakage currents. This helps to prevent electrical fires and other hazards.
- Fast response time: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS have a fast response time, which means that they can quickly trip the circuit in the event of an earth leakage fault. This helps to minimize damage to electrical equipment and property.
Is(xIn,Ir)
Ip(xIn,Ir)
TL=100s TL=150s
40 60s
80 120s
60 90s
120 180s
Please peruse this instruction manual before using.
Please handle this product by skilled or instructed person.
Before setting, turn off the upper circuit breaker, or turn off the circuit
breaker to be set or trip the breaker, then make sure of no current conducting.
70% LED(green)
PAL LED(yellow)
Start lighting
continuously
Pre-alarm operating time
OVER LED(red)
Trip
LTD time
0.5N m
3.Caution concerning usage
In(A)
Ts(s)
.5
60
100
150
.06
12
.7
.8
3
1
2
.1
4
5
6
7
8
10
4
6
8
12
.8
.2
.3
.7
1.0
.9
Ir(x400A)
200
250
300
350
225
16
T (s)
Ii(x400A)
10
14
LTD time T
L
STD time Ts
INSTRUCTION MANUAL
EARTH-LEAKAGE CIRCUIT BREAKERS
1.Before using
2.Caution for handlings
CAUTION
4.Setting method of the operating characteristics
Setting of LTD time TL
Pre-alarm operation time
LTD operating time
TL=60s
24 36s
48 72s
The result is good if the operating time measured falls within the following range.
200% of the current
setting
Current regulation
resistance
Current regulation
resistance
(2)Check following items by each LED in front of circuit breaker.
(1)Apply AC current to the circuit-breaker from three-phase or single-phase power supply.
In case of single-phase power supply, apply the current with any two poles in series.
(3)LTD and pre-alarm operating time can be checked by load current equivalent
to 200% of the current setting. If operating current of circuit breaker is
measured just before this test, operating time is shorter. In this case, please
measure again after circuit breaker is tripped.
5.Testing method
Check operation with load current or using the breaker tester "Y-250"(option).
If the breaker tester "Y-250" is used, execute the test according to its manual.
9.6 14.4s
4.8 7.2s
TL=12s
Sensitivity current selector
Operating time selector(time-delay type)
Test button
Leakage indicator(comes out at leak tripping)
Replacement label
Setting dial
70 LED(green)
PAL LED(yellow)
OVER LED(red)
Seal for current setting
Transparent cover
Trip button
(1) Open the transparent cover.
(2) Set operating characteristics by turning the dials.
A slotted head screwdriver of 4.5mm width and 0.6mm thickness
at the top is suitable for the setting.
Please operate the dials by the power less than 0.5N
m.
Otherwise, characteristics setting device may be broken.
Please set the step adjustable dials by the scale.
Otherwise, characteristic is not set up correctly.
As for Is setting, a set value may advance to the next one in some causes.
In case of LTD time TL="12s", the LTD time may be shorter than the STD time.
(3) The blank labels may be used for indication of the current setting.
Please fill in the blank label with oily ink, and stick the label to the top of the handle.
(4) Close the transparent cover.
Step adjustable:
Current setting 1 In,
L
LTD time T ,
STD pick up current Is,
STD time Ts,
Pre-alarm pick up current Ip
Continuously adjustable:
Current setting 2 Ir, (Note1)
Instantaneous pick up current Ii
Note 1) Current setting 2 Ir becomes effective when current setting 1 In is set at maximum.
Current
setting 1
In
Current
setting 2
Ir
Pre-alarm pick up
current Ip
STD pick up
current Is
Instantaneous
pick up
current Ii
Types NV400-SEW, NV400-HEW, NV400-REW
NV630-SEW, NV630-HEW
NV800-SEW, NV800-HEW, NV800-SEWL
Before starting to use, check operation of this product by pushing the
Test button. Unless voltage is impressed, Test button dose not function.
Connect a suitable electric wire for the rated current to
line side and load side.
In the case of single-phase two-wire system, connect the electric
wire to the right and the left pole.
In the case of single-phase three-wire system, connect the neutral
to the center pole of circuit breaker.
In the case of three-phase four-wire system, connect the neutral
wire to the neutral pole of circuit breaker.
OVER LED(red) : LED lights among 105 to 125% of current setting.
PAL LED(yellow) : I
n case of Pre-alarm pick up current Ip=0.7, LED blinks among
60 to 80% of current setting.
70% LED(green) : LED lights among 60 to 80% of current setting.
In(A)
.5
.7
.8
1
Ir(x400A)
200
250
300
350
225
In(A)
.5
.7
.8
1
Ir(x400A)
200
250
300
350
225
Current setting 1 Maximum
Current setting 2
0.7
Current setting
280A(=400A 0.7)
Current setting 1
250A
Current setting 2
0.7 Not effective
Current setting
250A
Example 1
Example 2
L
-
1
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS User manual
- Type
- User manual
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS
Product Information
Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are designed to protect electrical circuits from damage caused by earth leakage currents. They are suitable for use in a wide range of applications, including residential, commercial, and industrial.
Features
- High sensitivity: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS are highly sensitive, which means that they can detect even small earth leakage currents. This helps to prevent electrical fires and other hazards.
- Fast response time: Mitsubishi Electric EARTH-LEAKAGE CIRCUIT BREAKERS have a fast response time, which means that they can quickly trip the circuit in the event of an earth leakage fault. This helps to minimize damage to electrical equipment and property.
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