ZPA Pecky, a.s. MODACT MO EE 52 120, Mounting And Operating Instructions

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Operating position
Working position of actuators
MODACT
®
MOED EEx
actuators with plastic lubricant – any position.
The actuators with plastic lubricant are labelled “Filled: solid grease” on the power box at the side of the hand-wheel.
Actuators with oil charge – position limited only by slope of electric motor axis – max. 15° under the
horizontal level. In this way, reducing of service life of rubber sealing of the electric motor shaft by possible
fragments or impurities from the oil filling is prevented.
When the actuator is assembled with the electric motor above the horizontal plane the oil filling should
be topped up so that reliable lubrication of the motor pinion is ensured.
The actuators with oil filling are not labeled.
3) OPERATION MODE, SERVICE LIFE OF ACTUATORS
Operation mode
According to ČSN EN 60 034-1, the electric actuators can be operated in the S2 load category. The run time at
tempe50 °C is 10 min, the mean load torque is max. 60 % of the value of the maximum tripping torque Mv.
According to ČSN EN 60 034-1, the electric actuators can also be operated in S4 load category (interrupted
operation with starting-up).
The load factor N/N+R is max. 25 %; the longest operating cycle N+R is 10 min (the course of load is shown
in the picture). The maximum number of switching actions in automatic control mode is 1200 h
-1
. The mean load
torque with load factor 25 % and ambient temperature of 50 °C shall not exceed 40 % of the maximum tripping
torque Mv.
The highest mean load torque is equal to rated torque of the actuator.
Service life of actuators
Service life of actuators is 6 years, at the least.
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.
Service life of actuators for 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
Operating time N
Idling time R
Cycle period
Course of operating cycle
Mz Starting torque ≥ 1.3 x Mv
Mstř Average load torque
Mv Maximum tripping torque