Technical Data Electric double-motor-actuators

Transcription

1 M768 Electric double-motor-actuators Contents Page General data Overview, application, design and mode of operation, mounting position Technical details General Motors Switching and signaling unit Electrical data of motors Dimensional drawings 5-6 Wiring diagrams 7 Issue 06.0 Subject to changes without notice! Y070.7/GB

2 M768 General data Overview Electric double-motor actuators for closed-loop control equipment R series Type M768-D M768-E M768-F Cut-off torque, not adjustable Size to DIN 0 Output speed - for closed-loop control operation - for high-speed operation Motors - Control motor Operating mode to DIN EN High-speed motor Betriebsart nach DIN EN 600 Application 750 Nm 500Nm 000 Nm 5 5 or 0 rpm 0, 0 or 80 rpm Three-phase motors with PTC thermistors without or with brake S/S5 intermittent duty - 0% cdf c/h with < kw c/h with > kw without brake S - 5 min min short-time duty Torque-dependent switches 7 Transmission gear Torque spring (plate springs) 8 Worm gear l High-speed motor 9 Travel-dependent switches Planetary gear 0 Electronic position transmitter 5 Worm gear II Drive shaft 6 Control motor Double-motor actuators are special actuators which are used for open-loop control functions in addition to the closed-loop control operation. The positioning time reached by the control motor with the gear unit lies well within the range normally used for closed-loop control circuits. The positioning time reached by the high-speed motor is required for particular operating conditions in view of safety considerations. When the safe position is reached with the high-speed motor the control motor once again takes over the control function of the actuator in the control circuit via an appropriate switching unit. Corresponding to the specific tasks in a power station, three actuators with a cut-off torque of 750 Nm, 500 Nm and 000 Nm can be supplied; the ratio of the output speeds is specified in the ordering data. Double-motor actuators are normally mounted directly on the valve, for instance on a steam reduction valve. Design and mode of operation The gear unit is a combination of a primary spur gear, two self-locking worm gears and a planetary gear. (cf. Fig. ). In Iow-speed operation the power flow goes from the closed-loop control motor (6) via the primary spur gear and the worm gear l (8) to the sun wheel of the planetary gear (). The annulus of the planetary gear () is held in position by the self-locking worm gear II (5) via a hollow shaft. As a result the sun wheel transmits its rotary motion via the planetary gear () carrier onto the drive shaft (shaft end) (). In high-speed operation the power of the high-speed motor () is transmitted to the annulus via worm gear II (5). In this case the sun wheel of the planetary gear () is held in position by the self-locking of worm gear l (8) and the annulus rotation is transmitted to the carrier of the planetary gear () and in this way to the securely coupled drive shaft (). The torque-dependent cut-off is actuated by the traveling worm of planetary gear l. The high-speed motor can only be switched off by travel-dependent switches. The switching and signaling unit is driven by the drive shaft through an intermediate gear. The handwheel acts on the worm gear of planetary gear l through a link. By using a changeover lever during standstill of both motors manual operation can be switched on. Switching back takes place automatically when the control motor Starts. Mounting position The actuators can operate in any mounting position. However, since the gear runs in grease and it is not possible to keep the seals completely oil-tight over an extended period of operation it is advisable to mount the actuator on the final control element in such a way that the two motors are not hanging downward. In the case of horizontal mounting the actuator must be supported. Page Y070.7/GB

3 M768 Technical details General Electric double-motor actuators, R series, type series Cut-off torques Speeds of drive shaft for closedloop control operation/high-speed operation M , 500 and 000 Nm Temperature range (perm. ambient temperature) -0 to +60 C Degree of protection to EN Gear enclosure - Motors - Motor terminal box - Signaling and terminal box - Individual plug - Compact plug Operating mode to DIN EN for control operation - for high-speed operation Electric connection - Control motor - High-speed motor - Switching and signaling unit 5/0, 5/0, 0/0 or 0/80 rpm IP65 IP5 IP55 IP65 IP55 IP67 S /S 5 intermittent duty - 0% cdf c/h with < kw c/h with > kw (power of control motor) Short-time duty S - 5 min - via terminals in motor terminal box - via individual plug or - via compact plug via terminals in motor terminal box - via terminal strip (8-pole) in terminal box, - via individual plug or - compact plug ( x -pole) Painting (Moderate) RAL 700 Thread for cable glands see dimensional drawings Weights - M768-D 0 kg - M768-E /-F 00 kg Motors Type and mains connection Thermal protection Insulation class Three-phase asynchronous motors /PEN AC 50 Hz 0/00 V or 500 V with or without brake (high-speed motor only without brake) PTC thermistor temperature detectors - H for motors without brake - F for control motor with brake Electric data see table page Switching and signaling unit Torque-dependent and travel-dependent switches ( and ) - Versions - Connection types Mechanical lifetime Microswitches with silver contacts or with gold-plated contacts as NC, NO or changeover contacts, switchable with the same voltage potential approx. 0 7 switching cycles - Switches with silver contacts permissible current loading 5 A for AC 50 V 0, A for DC 50 V 8 A for AC 5 V 0,6 A for DC 5 V 0 A for AC 0 V 5 A for DC 0 V with gold-plated contacts permissible voltage max. DC 60 V rated utilization voltage DC V; to 5 ma Note: Operation with a voltage higher than 60 V is not permissible since it damages the contact properties. Contact assignment of the microswitch is only possible with the same potential. Electronic position transmitter (ESR) - Version SX9000-WR00 (C75-A8-A / R0) without restoring spring, turning through - Measuring range smallest measuring span largest measuring span 0 to Torque at drive shaft approx 0. Ncm - Electric connection - or -wire connection - wire connection Supply voltage UH DC 8 to 0 V DC to 0 V Maximum load RL 50 (UH -,5) Ω 50 (UH -) Ω Output signal load-independent direct current 0 to 0 ma) to 0 ma Current consumption max. 0 ma max. 0 ma - Linearity error (tolerance band setting) for a measuring span of 70 % - Influence with a measuring span of 70 for supply voltage load ambient temperature Space heater (Hz) 0,% over the whole range 0,%/0K - Supply voltage AC V, 0 V or 0 V depending on order - Power consumption 7 to 8 W ) to 0 ma setting possible Y070.7/GB Page

4 M768 Electrical Data of motors Complete thermal protection with PTC thermistor temperature detectors possible for every motor Double-motor actuators, R series Motor M768- Closed-loop control motor without brake Closed-loop control motor with brake High-speed motor -D5 -D5 -D5 -D55 -E5 -E5 -E5 -E55 -F5 -F5 -F5 -F55 -D5 -D5 -D5 -D55 -E5 -E5 -E5 -E55 -F5 -F5 -F5 -F55 -D5 -D5 -D5 Data of used motors Rated power to V No. of poles Rated speed Power factor Rated current at Efficiency η Lockedrotor current Rated torque Lockedrotor torque Size to DIN Form to DIN Flange size to DIN Cut-off torque V ) factor factor Nm kw rpm % cos ϕ A Nm L B 5 A L A S A L B 5 A L A S A M D E5 -E5 -E E F5 -F5 -F S. 60 M -F M 60 L B 5 A 00 A 50 ) For other voltages convert the values to the inverse proportional voltage, e.g.: I 500 V = I 00V (A) 00 V 500 V Page Y070.7/GB

5 M768 Dimensional drawing M768-D max 0 0 max Pg Pg x Pg max 75 g6 65 M0 bored through 78 0 Pg Pg Keep terminal connection accessible! Space required for removing the hood Pg 6 Pg Pg 6 Space required for removing the plugs Space required for removing the plug max 65 Size acc. DIN 0 Cut-off torque 750 Nm High-speed motor Control motor Reduction ratio: handwheel/drive shaft : Drive shaft with free end, D version acc. DIN 0; featherkey A x 8 x 80 DIN 6885 sheet 5 Oil filler screw 6 Oil outlet screw (hexagon socket 8) Electrical connection: 7 Terminal box with 8-pole terminal strip for switching and signaling unit 8 Individual plug for the control motor 9 Two -pole individual plugs for the switching and signaling unit 0 Compact plug with plug inserts for the control motor and the switching and signaling unit ( x -pole) Y070.7/GB Page 5

6 M768 Dimensional drawing M768-E, M768-F 70 L P Pg 6 7 Q N Pg 9 5 M A f8 5 G C 0 B X Partial view X H J 9 R 5 Keep terminal connection accessible! Space required for removing the plugs Space required for removing the hood Pg 8 Pg Pg 6 Pg Pg 6 Space required for removing the plug High-speed motor Control motor Reduction ratio: handwheel/drive shaft 00: Drive shaft with free end, D version acc. DIN 0; featherkey: see table 5 Oil filler screw 6 Oil outlet screw (hexagon socket 8) Electrical connection: 7 Terminal box with 8-pole terminal strip for switching and signaling unit 8 Individual plug for the control motor 9 Two -pole individual plugs for the switching and signaling unit 0 Compact plug with plug inserts for the control motor and the switching and signaling unit ( x -pole) Doublemotor actuator Size acc. DIN 0 Cut-off torque A B C Threaded bores D G H J Featherkey acc. DIN 6885, sheet K max L max M max N P Q R M768-E 500 Nm x M 6, 0 deep A x 9 x M768-F Nm x M 0, 8 deep A 8 x x Page 6 Y070.7/GB

7 M768 Wiring diagram M768 Motor connections Three-phase motor for closed-loop control, with PTC thermistors, with or without mechanical brake, with or without anti-condensation heater + M ~ Three-phase motor for closed-loop control, with PTC thermistors and with mechanical DC-operated brake for high-speed cut-off,, with or without anti-condensation heater M ~ + Circuit for the version with brake motor The eventually mounted brake motor is designed for quick stopping. For that the brake connection (Br) has to be connected to the phase conductor L before the reversing contactor module (see terminal connection diagram in the terminal compartment). Kl. St. 00V St. 500V PE U V W UVWN Electric connection via Terminals Plug, 0-way, 00 V Plug, 0-way, 500 V Three-phase motor for high-speed operation, with PTC thermistors, without brake, with or, without anti-condensation heater M ~ + Kl. St. 00V St. 500V PE U V W Br UVWN Br Electric connection via Terminals Plug, 0-way, 00 V Plug, 0-way, 500 V Switching during operation Danger Voltage disconnection in case of quick stopping is only possible over the main switch, because voltage can be present via the tapped Br line even when the contactor is switched off. Change of direction of rotation is only possible in interverting the phases L and L! With normal cut-off, connect Br to V. Kl. PE U V W UVWN Electric connection via terminals L L L Supply disconnection Connection of switching and signaling unit a ESR B (S) BL S5 S S S S POT R E S A HZ E 7 8 b (S) S7 S8 S9 S0 POT R E S A A POT R E S S S S5 S The connection diagram is valid for terminal and plug connection. BL Blinker contact Torque-dependent switch Travel-dependent switch The and switches are shown not activated POT ESR HZ Potentiometer for position indication Electronic position transmitter a with -wire connection b with -/-wire connection Space heater Y070.7/GB Page 7

8 M768 Issue 06.0 SIPOS Aktorik GmbH Y070.7/GB Subject to changes without notice! Im Erlet D-9058 Altdorf