Thermal overload protection explosion proof electric actuator/PTC overheating protector

Type	DCL-Ex40
	DC24V	AC110V	AC380V	AC220V
Motor Power	70W	90W	40W	90W
Rated Current	7.80A	1.12A	0.29A	0.64A
Standard Time/Torque	30S/400Nm
Optional Time/Torque	15S/200Nm			15S/200Nm  60S/400Nm
Turning Angle	0～900 Adjustable
Available Control Circuit	Type of A、B、C、D、E、F、G、H、
Total Weight	9.5kg
Insulating Resistance	100MΩ/250VDC	100MΩ/500VDC
Withstand Voltage Class	DC24V: 500VAC  1 minute、AC110V/AC220V: 1500VAC   1 minute、AC380V: 1800VAC   1 minute
Protection Class	IP67
Expiosive-proof grade	ExⅡBT4Gb
Installation Angle	3600 at any angle
Electric Interface	2-M20×1.5explosion-proof plug,clients should install corresponding explosion-proof cable connector when using according to the cable selected.
Ambient Temperature	‘-20～+60℃
Optional Function	Over-torque Protector/Heater

Features

1. 360° turn for 50Nm and 90° for other torque

2. Fully enclosed squirrel-cage asynchronous motor with F-class insulation rating

3. Auto reset thermal switch embedded in the motor winding – trips

4. Rugged IP68 and type 4X aluminum alloy with thermally bonded polyester coating

5. Explosion proof grade ExdIIBT4 for ATEX/Zone system and Group C, D T4 for Division system

6. Self-locking all metal gear train

7. Two auxiliary limit switches to confirm valve position

8. Manual override with handwheel or wrench

9. CSA certification per UL and CSA standard/ATEX/CE/RoHS 3.0/SIL 3

 

Description

DCL explosion proof electric actuators are widely used for explosive gases environment. High temperature may ignite the flammable gases out of actuator. T4 grade requires the highest enclosure outside surface’s temperature must be less than 135℃(300F), in whatever conditions. Considering a buffer for errors may happen, the temperature set for motor power down is 125℃(282F). PTC overheat protector is embedded in the motor winding-trips, where is the highest temperature rise part of whole actuator, instead of out of motor, to 100% ensure outer surface temperature will not go beyond required T4 grade.

On the other hand, motor must be proper designed and quality controlled. Motor’s power, wire diameter, number of coil turns, magnet material and capacitance connect to motor will influence the motor’s temperature rise. So professional actuator manufacturer must design its own motors with specifications that can best match with its gear drives. General motor will cause frequently power off with heavy duty rate and can hardly satisfy explosion proof requirements for temperature 

Dynamic Corporation Limited