lpd datasheet -v1 - electric and hydraulic actuators

LPD

PAGE 1 OF 7 November 2019 ELTORQUE

Eltorque LPD

For double-acting actuator (Quarter-turn)

LPD


LPD description

The LPD (Local power unit for double acting) is designed for the control of double-acting actuators requiring hydraulic pressure for operation in open or closed position. The LPD is an integrated electro-hydraulic system for remote control of valves and actuators, and which is especially developed for mounting directly on valve actuators, primarily on board ships.

The LPD consists of a hydraulic pump which is driven by a squirrel-cage motor with interface functions. The LPD offers installation in both safe and hazardous area in two basic versions: −− LPD for safe area −− EX LPD for hazardous area

LPD features

−Due to incompressibility of hydraulic medium used, zero system leak and high holding pressure give the electro-hydraulic actuator with relatively high accuracy of valve positioning. −The indicator can clearly identify the open and closed position.

−Wiring is safe and convenient. −Standardized wiring interface. −Ease of commissioning and filling oil. −Low energy consumption.

LPD main data

Applications: Double acting hydraulic actuator Working pressure: 130 bar Max. working pressure: 160 bar Oil connection nozzle: BSPP1/4" Safety valve pressure: 130 bar (max. WP is 160 bar) Max. running time: Up to 2 min. dependent on ambient temperature Enclosure rating: IP68 (10m in 72 hours) Test pressure: 230bar Ambient temperature : -15℃ ~ +60℃（-25℃ to 70℃ on request） Tank volume: Approx. 300-600CC or 800-2500CC Weight: 20kg (200W)/ 40kg (750W) House material: Aluminum alloy die-casting Hydraulic oil: Viscosity range: 15 - 64 cSt Power supply: 230V/380 AC 50 or 60 Hz ± 10% , dual 230VAC

50 or 60 Hz ± 10% Motor power: 200W or 750W Valve position indicator:

Option 1: Limit Switch/Encoder at actuator (actuator dry installation, Limit Switch used for on/off type, Encoder used for modulating type). Option 2: Pressure sensor/ Flow-meter at LPD (actuator submerged and modulating).

Class of motor work: S3-10%(200W), S2-10%(750W)

Hydraulic diagram for LPD

1-Motor

2-Non-return valve 3-Two way hydraulic pump 4-Relief valve 5-Non-return valve 6-Emergency connection with non-return valve 7-Double acting hydraulic actuator 8-Limit switch

LPD


Operation LPD

1-The valve open/closed control signals are from the external control cabinet. 2-Open the valve: The local power unit receives the signal to open the valve, and the motor starts the hydraulic pump to provide the power oil for the actuator "open valve" oil port until the actuator is fully opened. Then the valve position feedback device sends the signal to control system to cut off the motor power and sends the "valve open" signal to the external control cabinet. 3-Close the valve: The local power unit receives the signal to close the valve, and the motor starts the hydraulic pump to provide power oil for the actuator "close valve" oil port until the actuator is completely closed. Then valve position feedback device sends the signal to control system to cut off the motor power and sends the "valve closed" signal to the external control cabinet. 4-Modulating valve control: The actuator is equipped with a quarter-turn encoder for position feedback. The actuator 0°~90° stroke position can be adjusted under

the control signal.

5-Valve-position fault: When the local power unit loses power, signal or oil pressure, the actuator will hold last position. 6-Valve-jammed alarm: When the local power unit receives the valve open or close signal, and the valve can’t be fully open or closed, the control

system will cut off the power supply to motor through the preset time relay in the control system, and simultaneously sends out the alarm signal. 7-Emergency local operation: The local power unit has the emergency operation interface. In the case of "three-lose", the valve can be opened or closed through the emergency hand pump.

Cable gland Application Thread Number Cable min. Φ Cable max. Φ IP Note

CANopen(Power) M25*1.5 4 13mm 18mm 68

CANopen(Signal) M20*1.5 3 8mm 14mm 68

Digital(Power) M25*1.5 2 13mm 18mm 68

Digital(Signal) M20*1.5 3 8mm 14mm 68

LPD controls

The LPD is designed with interfaces to CANopen, dual CANopen or Digital control systems.

Emergency operation of LPD

With portable hydraulic hand pump A portable hand pump is connected to the two quick connectors, which are directly connected to the LPD’s ports. The actuator can be operated in either

direction, until the required position is reached. If too high pressure is applied to the LPD, the relief valve will let the oil flow to the tank. The hand pump is disconnected. The actuator is hydraulically locked in last position. With fixed hydraulic hand pump Open two stop valves for inlet and outlet of hydraulic hand pump, and open or close is selected on the hydraulic hand pump lever, the hydraulic hand pump is operated until the required position is reached. The actuator is hydraulically locked in last position.

Note！

After emergency operation, remote control is automatically resumed.

LPD


Electrical LPD

(1) For the Digital interface LPD, 1Ph 230V AC 50/60 power supplied from the external control cabinet or shipyard and uses max 3 x 4.0 mm² power cables. 7 x 0.75 mm² cables containing motor control and position indication signals are connected between the external control cabinet and each local power unit. (2) For the Digital interface LPD, 3Ph 380V AC 50/60 power supplied from the external control cabinet or shipyard and uses max 4 x 4.0mm² power cables. 7 x 0.75 mm² cables containing motor control and position indication signals are connected between the external control cabinet and each local power unit. (3) For the CANopen interface LPD, 1Ph 230V AC 50/60 power supplied from the external control cabinet or shipyard and uses max 3 x 4.0 mm² power cables. 2x0.75 +0.75mm² cables containing motor control and position indication signals are connected between the external control cabinet and each local power unit.

(4) For the CANopen interface LPD, 3Ph 380V AC 50/60 power supplied from the external control cabinet or shipyard and uses max 4 x 4.0 mm² power cables. 2x0.75 +0.75 mm² cables containing motor control and position indication signals are connected between the external control cabinet and each local power unit. (5) The motor/pump starts by means of control interface - open or close. If the pressure exceeds 130 bar for 7 sec. the timer stops the motor/pump. This circuit ensures a high safety on the LPD.

LPD electrical diagram

(Digital single power 230VAC)

LPD wiring diagram




LPD wiring diagram


LPD


LPD electrical diagram (CANopen single power 230VAC)

LPD wiring diagram (CANopen single power 230VAC)


(CANopen dual power 230VAC)

LPD wiring diagram



(CANopen single power 380VAC)

LPD wiring diagram

(CANopen single power 380VAC)

LPD




LPD wiring diagram


Dimensions LPD

LPD dimensions（normal used for EDQ120, EDQ350,EDQ700,EDQ1400,EDQ3000,EDQ5000）

LPD dimensions（normal used for EDQ10K, EDQ20K）

Mounting on hydraulic actuators

Direct mounting on double hydraulic actuator HDQ120-20K, and the specific dimensions of LPD mounted on the hydraulic actuator HDQ are shown in the table below.

Note! Oil level must be checked before starting up the LPD. The LPD may be emergency operated as if mounted direct on actuator.

LPD


Operating speed

The operating duration can be calculated from the oil displacement of the actuator.

Actuator type Hydraulic actuator oil displacement(L) Min. operating time(sec.) open/close for LPD

Gear pump flow and power (normal)

EDQ120 0.02 4 0.52L/min, 200W

EDQ350 0.05 6 0.52L/min, 200W

EDQ700 0.11 12 0.52L/min, 200W

EDQ1400 0.22 24 0.52L/min, 200W

EDQ3000 0.45 50 0.52L/min, 200W

EDQ5000 0.78 86 0.52L/min, 200W

EDQ10K 1.52 46 2.0L/min, 750W

EDQ20K 3.1 93 2.0L/min, 750W

Please note that Min. time is calculated value. Dimensions LPD on HDQ actuator

EDQ120,EDQ350,EDQ700, EDQ1400, EDQ3000, EDQ5000

EDQ10K, EDQ20K

All dimensions in mm

H1 L1 L2 L3 L4 KXK T ISO5211 Oil

connector Torque

Working pressure

EDQ120 110 360 130 110 115 11X11 27 F05/F07 G1/4" 120N.m 130 Bar

EDQ350 140 365 125 115 135 22X22 30 F07/F10 G1/4" 350N.m 130 Bar

EDQ700 165 435 145 145 155 27X27 36 F10/F12 G1/4" 700N.m 130 Bar

EDQ1400 195 520 175 170 190 36X36 46 F14 G1/4" 1400N.m 130 Bar

EDQ3000 235 630 212 205 205 46X46 50 F16 G1/4" 3000N.m 130 Bar

EDQ5000 255 650 215 220 215 46X46 50 F16 G1/4" 5000N.m 130 Bar

EDQ10K 340 865 280 305 280 55X55 65 F25 G1/4" 10000N.m 130 Bar

EDQ20K 420 1100 375 350 305 65X65 75 F30 G1/4" 20000N.m 130 Bar

lpd datasheet -v1 - electric and hydraulic actuators

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