Panasonic M41A1G4L Operating Instructions Manual page 33

Safety standard approved motor
Overheat protection device
If a motor in operation is locked due to overloading or the input is increased for some reason, the
temperature of the motor will rise rapidly. If the motor is left in this condition, the insulating performance in
the motor will be deteriorated, leading to shortening of the life and, in the worst case, burning of the coil. In
order to protect motors from such abnormal heating, our motors compliant with overseas standards are
equipped with the following overheat protection device.
• Motor with thermal protector
In the case of the motors with mounting surface dimensions of
70 mm sq., 80 mm sq. and 90 mm sq., an automatic-reset
thermal protector is incorporated.
The construction of the thermal protector is shown in the figure to the
right. The thermal protector is of bimetallic type and silver or silver
alloy, which has low electrical resistance and high thermal
conductivity, is used for the contacts.
Operating temperature of thermal protector
<International standard approved>
open........130± 5 ˚C
close......... 90±15 ˚C
(When the thermal protector is operating, the temperature of the coil is slightly higher than the operating temperature
shown above.)
Test: It has passed a lock test of 18 days straight.
• Impedance protected motor
It is applied to the motors with mounting surface dimensions of 60 mm sq.. The impedance of the coil of the impedance
protected motor is made higher so as to make smaller the current (input) increase when the motor is locked, preventing the
temperature rise from exceeding a certain level. Test: It has passed a lock test of 18 days straight.
General specifications for safety standard motor
Insulation resistance:
The value measured between the coil and case
with a 500 VDC megger after continuous operation
at normal temperature and humidity should be 50
MW or more.
Dielectric strength:
No anomaly should be found when 1.5 kV, 60 Hz
is applied to between the coil and case for one
minute after continuous operation at normal
temperature and humidity.
Standard
Test Item
150 V or lower
Higher than 150 V
The EN standard, IEC standard and GB standard specify
1500 V for one minute.
Overheat protection system:
The motors with mounting surface dimensions of
60 mm sq. is impedance-protected. The other
motors incorporate an automatic-reset thermal
protector.
Panasonic Corporation Electromechanical Control Business Division
industrial.panasonic.com/ac/e/
<Japanese version / Variable speed motor 90 W>
open........120± 5 ˚C
close......... 77±15 ˚C
Electrical Appliance
and Material Safety Law
1000 V for one minute
1500 V for one minute
• Construction of thermal protector
(Automatic reset type)
Lead wire
Heat resistance class:
Specifications compliant with overseas standards
Heat resistance class 130 (B)
Operating ambient temperature range:
–10 ˚C to +40 ˚C
Operating ambient humidity range:
85 % RH or less
Altitude:
1000 m or less
Vibration:
4.9 m/s or less
2
Working power supply voltage:
Rated voltage (value shown on nameplate) ±10 %
means a power supply voltage fluctuation range
and does not refer to voltage that can be used at
any time.
Working power supply frequency:
50 Hz/60 Hz (Value shown on nameplate)
– A-62 –
© Panasonic Corporation 2018
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AQCTB02E 201806-E