31
30
Ex9ML series residual current protection module
Ex9ML1
Ex9ML2
Ex9ML3
Frame size rated current Inm (A)
160
250
400/630
Pole number
3P
、
4P
3P
、
4P
3P
、
4P
Rated insulation voltage Ui (V)
1000
1000
1000
Rated impulse withstand voltage Uimp (kV)
8
8
12
Rated operating voltage Ue (V), AC 50/60Hz
380/400/415
、
440
380/400/415
、
440
380/400/415
、
440
Rated residual
non-operating
current IΔn (A)
A type/AC type
RCD1 (4 steps
adjustable)
0.03-0.1-0.3-1
0.03-0.1-0.3-1
0.03-0.1-0.3-1
RCD2 (4 steps
adjustable)
0.05-0.2-0.5-2
0.05-0.2-0.5-2
—
RCD3 (4 steps
adjustable)
—
—
0.05-0.2-0.5-1
RCD4 (4 steps
adjustable)
—
—
0.1-0.3-1-2
Rated residual non-operating current IΔno (A)
0.5IΔn
0.5IΔn
0.5IΔn
Limit non-actuating time
1)
Δt : 0-60-200-500
Maximum breaking time (ms)
Total breaking time
(adjustable)
100-300-500-1000
100-300-500-1000
100-300-500-1000
Rated residual connecting and breaking capacity
IΔm (kA)
0.25Icu
0.25Icu
0.25Icu
Circuit breaker frame size
Ex9M1
Ex9M2
Ex9M3
Circuit breaker
release type
Distribution
protection
TM
■
■
■
SU20L
—
■
■
SU20S
—
■
■
Motor
protection
M
■
■
■
SU20LM
—
■
■
SU20SM
—
■
■
Leakage alarm non-release function
□
□
□
Applicable standards
IEC/EN 60947-2
Residual current category
A/AC
A/AC
A/AC
Isolating function
■
■
■
Applicable operating ambient temperature
-40°C~+70°C
2)
Outline dimensions
(mm)
Width (W)
╳
Height
(H)
╳
Depth (D)
w
H
D
Width (3P/4P)
90/120
105/140
140/185
Height
205
232
355
Depth
85
94.5
118.5
Weight (kg)
3P
0.43
0.84
1.98
4P
0.51
1.08
2.69
Functions
Functions
■ Yes □ Optional — No ○ Contact us for specific ordering.
Note:
1)
If the residual operating current is set to 0.03A, the limit non-actuating time must be set to 0;
2)
The operating temperature for basic type (dial switch) electronic circuit breakers is -35 °C ~+70 °C, and the operating temperature for
standard type (LCD) electronic circuit breakers is -25 °C ~+70 °C
AC power distribution protection
Primary distribution
air circuit breaker
Secondary distribution moulded
case circuit breaker
Tertiary distribution miniature circuit
breaker and surge protector
Key parameters
Protections
Applicable to distribution circuits with AC 50/60Hz and rated voltage up to 690V
The maximum rated operating current is up to 1600A for continuous stable operation at +40°C
The maximum short circuit breaking capacity is up to 150kA under AC 415V
Overload protection
The inverse time limit feature of the release characteristic curve of Ex9M enables it not only to
maintain continuous power supply in case of short period of slight overload, but also to cut off
overload current in case of harmful overload.
Short circuit protection
Short time delay short circuit protection: When the short circuit current in the protected circuit
reaches the set value of Isd, the circuit breaker will release after a very short period of delay.
This function can be used with downstream circuit breaker for selective protection;
Instantaneous short circuit protection: When the short circuit current in the protected circuit
reaches the set value of Ii, to ensure the safety of the circuit, the Ex9M circuit breaker will
release within 50ms, if the short circuit current reaches 150kA, the circuit breaker will release
within 2ms.
Undervoltage protection
When there is abnormal voltage fluctuation in the protected circuit, and the actual fluctuation
range is from 35%-70% (undervoltage) of the rated value, the Ex9M circuit breaker will cut off
the load in the protected circuit. This function requires a undervoltage release (UVT).
Isolation
Make sure no accidental electric shock that can cause personal injury or property damage will
occur during maintenance of distribution system.
Residual current protection
Ex9M1/ Ex9M2/ Ex9M3 are equipped with residual current protection module for following
protections:
* Overload and short circuit protection for the equipment;
* Indirect contact protection for human, preventing risk of grounding current increase due to
insulation damage.
* Protect from fire and other risks caused by long-existing grounding fault that cannot be
detected by overcurrent protection device.
* In case the failure of corresponding protection measure, the residual current protection circuit
breaker with rated residual operating current up to 30mA can also provide supplementary
protection for direct contact.
