5
Service life of actuators
The actuator intended for shut-off valves must be able to perform at least 10,000 operating cycles
(C - O - C).
The actuator intended for regulating purposes must be able to perform at least 1 million cycles with operation time
(during
which the output shaft is moving)
at least 250 hours. Service life in operating hours
(h)
depends on load and number of
switching. Not always, high frequency of switching influences positively accuracy of regulation. For attaining the longest
possible faultless period and service life, frequency of switching is recommended to be set to the lowest number of switching
necessary for the given process. Orientation data of service life derived from the set regulation parameters are shown in the
following table.
When using reversing contactor unit the service life of actuator is 1 million starts
Service life [h]
830
1 000
2 000
4 000
Number of starts [1/h]
Max. number of starts 1200
1 000
500
250
When using reversing contactless unit the service life of actuator is 3 million starts
Service life [h]
2490
3000
6000
12000
Number of starts [1/h]
3600
3000
1500
750
4. TECHNICAL DATA
Supply voltage
Supply voltage of electric motor:
MODACT MONED, MOPED 3 x 230/400 V, +10 %, -15 %, 50 Hz ±2 %
3 x 220/380 V +10 %, -15 %, 50 Hz; +3 % -5 %
MODACT MONEDJ
1 x 230 V, +10 %, -15 %, 50 Hz ±2 %
1 x 220 V +10 %, -15 %, 50 Hz; +3 % -5 %
(or according to data on the rating plate)
Actuators designed to operate at another voltage and frequency than those given above are available upon special
request. For more details, refer to the Technical conditions.
Protective enclosure
Protective enclosure of actuators:
MODACT MONED, (MODACT MONED Control), MONEDJ – IP 55
MODACT MOPED (MODACT MOPED Control) – IP 67
Noise
Level of acoustic pressure A
max. 85 dB
(A)
Level of acoustic output A
max. 95 dB
(A)
Tripping torque
Tripping torque is set at the manufacturer according to the customer's requirements within the range given in Table No. 1 or
No. 2. If setting of tripping torque is not required maximum tripping torque of the required type number of the electric actuator is set.
Starting torque
The starting torque of the actuator is a calculated value determined by the starting torque of the electric motor and
the total gear ratio and efficiency of the actuator. After run reversation, the actuator can produce a starting torque for the
duration of 1 to 2 revolutions of the output shaft when torque-limit switching is locked. This can take place in either end
position or in any intermediate position.
Operating time N
Idling time R
Cycle period
Course of working cycle
Mz Starting torque ≥ 1,3 . Mv
Mstř Average mean load torque
Mv Maximum mean tripping torque