MHT258a (Engl.)
3-5
(
＊
) 80%ED : Cyclic duration factor operating duty is 80% : Intermittent periodic duty
The factor is difined as
N (operation under rated conditions)
N (operation under rated conditions) + R(at rest and de-energized)
×
100 [%]
Intermittent periodic duty involve alternating operating and loading times and pauses during which a motor (or
amplifier) is at a standstill (or de-energized).
The loading and standstill times of one cycle, which has a duration of 10 minutes, are so short that the steady-
state temperature cannot be attained. The cycle duration factor is the ratio between the operating or loading time
and cycle duration.
An ambient temperature of the amplifier must be kept at 55 [
℃
] maximum, at different points around the amplifier, at a distance of 50[mm]
maximum from the amplifier.
To keep the above mentioned ambient temperature of amplifier, the amplifier should be mounted in a forced-fan-ventilated panel or
equivalent cooling conditions.
Avoid the excessive temperature rise due to heat losses by the regenerating braking resistor etc. in the panel.
(c) Forced-fan-ventilated panel
Provide an exhaust port and an air intake (suction) port in the panel, and mount a fan to the exhaust port to forced ventilate the internal air.
Also, mount an air filter to the air intake port in order to maintain an environment better than IEC664 pollution degree 2 (*) in the panel. For
the air volume and the opening size of the air intake, refer to the following table.
Refer to technical document No. MHT221f (Engl.), chapter 2.2
(*) Pollution degree 2: An environment in which only non-conductive pollution is generated, except for occasional occurrence of temporary
conductivity due to condensation.
Amplifier output
[kW] 0.05, 0.1
0.2
0.4
0.75
1
Air volume of forced-ventilation-fan
[m
3
/min] 0.06
0.11
0.23
0.43
0.57
Opening size of air intake (suction air)
[m
2
] 0.0009
0.0019
0.0038
0.0071
0.0095
Amplifier output
[kW] 1.5
2
3
4
5
Air volume of forced-ventilation-fan
[m
3
/min] 0.85
1.14
1.7
2.27
2.84
Opening size of air intake (suction air)
[m
2
] 0.0142
0.0189
0.0284
0.0378
0.0473
(4)
(1)
(2)
(5)
(3)
(6)
(1) Exhaust air
(2) Air intake, suction air
(3) Air filter
(4) Amplifier
(5) Fan
(6) Forced-fan-ventilated panel
Summary of Contents for Faldic-a Series
Page 1: ...RYS V Type User s Manual MHT258a Engl...
Page 55: ...3 28 MHT258a Engl 2 RYS amplifier a 0 03 to 0 2 kW 5 5 150 0 5 0 5 53 60 160 130...
Page 56: ...3 29 MHT258a Engl b 0 4 kW 160 130 60 80 53 150 0 5 0 5 5 5...
Page 57: ...3 30 MHT258a Engl c 0 75 kW 130 160 60 100 54 39 0 5 0 5 150 0 5 0 5 5 5...
Page 58: ...3 31 MHT258a Engl d 1 to 1 5 kW 160 130 60 115 54 54 0 5 0 5 150 0 5 0 5 5 5 Cooling fan...
