HKC HQ-030 - User Manual

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Summary

Introduction

Safety Notices

Outlines precautions to reduce risk of injury and equipment damage.

General Information and Features

Hand Wheel and Declutching

Explains the operation of the manual override system.

Installation (Continued)

Hazardous Area Installation

Details safety requirements for installing actuators in potentially explosive atmospheres.

Setting Potentiometer Calibration

Instructions for recalibrating the potentiometer for actuator position feedback.

CPT Zero and Span Calibration

Procedure for calibrating the zero and span values of the CPT.

Actuator Mounting

Provides instructions and details on how to mount the actuator onto a valve.

Limit Switch Setting

Step-by-step guide for setting the actuator's limit switches.

Torque Switch Setting

Information regarding the setting and function of torque switches.

Mechanical Travel Stop Adjustment

Procedure for adjusting the mechanical travel stops of the actuator.

Proportional Control Unit (PCU)

Proportional Control Unit (PCU) (Continued)

Deadband Setting

Instructions on how to adjust the deadband for actuator stop position tolerance.

Auto Setting Function

Describes the process of automatic setting for actuator operation.

Random Command Signal Setting

Procedure to set Zero and Span signals for command input.

PCU Function and Usage

Explains DIP switch settings for input signal selection and output feedback.

Deadtime Setting

Instructions on how to adjust the deadtime for signal stability.

Fail-Safe Settings

Configuration options for fail close, fail open, and fail stop modes.

Troubleshooting

Actuator Does Not Respond

Steps to diagnose and resolve issues where the actuator does not respond.

Actuator Not Operating (Power Supplied)

Steps to diagnose and resolve issues where the actuator has power but does not operate.

Troubleshooting (Continued)

Erratic Actuator Operation

Steps to diagnose and resolve issues related to erratic actuator movement.

Installation and Maintenance Tips

The HKC HQ Series Quarter-turn Electric Actuator is designed for the operation of industrial valves, such as butterfly and ball valves. This manual provides comprehensive instructions for its installation, operation, and maintenance.

Function Description:

The HQ Series electric actuators provide precise control for quarter-turn valves. They are equipped with a declutchable manual override system, allowing for manual operation in case of power failure or for initial setup. The actuators can be configured for clockwise (standard) or counter-clockwise rotation to close, by adjusting the wiring and PCU board settings.

The actuators feature limit switches to define the fully open and fully closed positions, and torque switches to prevent damage from overload conditions. An optional Current Position Transmitter (CPT) provides a 4-20mA output signal, indicating the current valve position. For more advanced control, a Proportional Control Unit (PCU) is available, offering various input and output signal types, dead time, and dead band settings. Communication protocols like ProfiBus and ModBus are also supported as optional features, enabling remote control and monitoring.

Important Technical Specifications:

Torque Output: Ranges from 40 Nm to 8,830 Nm (350 In-Lbs to 78,120 in-Lbs), with 19 models available.
Operating Time (90°): Varies by model, e.g., HQ-004 (12/12 sec), HQ-080 (37/31 sec), HQ-900 (117/99 sec).
Power Supply: Available in AC (1 phase 50/60 Hz, 3 phase 50/60 Hz) and DC (24V dc, 12V dc).
Rated Current: Varies significantly by model and power supply, e.g., HQ-008 (0.5/0.5 A for 220Vac 1ph), HQ-080 (1.1/0.7 A for 440Vac 3ph).
Enclosure Rating: Ingress protection IP67, NEMA 4, 4X & 6 (Weatherproof). Optional IP68 (10m / 72hr) for watertight applications.
Explosion Proof Options: IECEx, ATEX, CSA, KCs, EAC certified for Ex db IIB T4 Gb and Ex tb IIIC T135°C Db.
Ambient Temperature: -20 °C to +60 °C (except on CPT & PCU board, which is -25°C to 80°C).
Motor: Squirrel caged induction motor with built-in thermal protection.
Switches:
- Limit Switches: 2 x open/close SPDT, 250 Vac 16A rating.
- Auxiliary Limit Switches (Optional): 2 x open/close SPDT, 250 Vac 16A rating (except HQ-008/010).
- Torque Switches: Open/close SPDT, 250Vac 16A Rating (except HQ-008/010).
- Additional Torque Switches (Optional): 2 x SPDT 250V ac 16A Rating.
Travel Angle: 90 degrees +/- 10%.
Self-Locking: By means of worm gear.
Mechanical Travel Stops: 2 x external adjustable mechanical travel stops.
Cable Entries: [2xNPT 3/4", 2xM25 for Ex db, additionally M20, M25 and NPT3/4" with M30 adaptor for Ex tb (by user selection)].
Lubrication: Grease moly EP, almost permanently lubricated.
External Coating: Dry powder polyester coating, max thickness 2mm for Ex tb application.
Duty Cycle: Short-time duty S2 or Intermittent duty S4, as per VDE 0530 / IEC 60034-1. Exceeding rated duty cycle may cause thermal overload.
Space Heater: Ceramic housing with thermostat (60°C set temperature) to prevent condensation.
Proportional Control Unit (PCU) Specifications:
- Input Signal: 4~20mA dc, 0~20mA dc, 1~5V dc, 0~5V dc, 2~10V dc, 0~10V dc.
- Output Signal (feedback): 4~20mA dc, 0~20mA dc, 1~5V dc, 0~5V dc, 2~10V dc, 0~10V dc.
- Dead Time: 0.2~7.5 sec (16 steps).
- Dead Band: 0.3~7.5% (AC PCU), 0.4~7.5% (DC PCU) (16 steps).
- Fault Mode: Fail close, Fail open, Fail stop.
Current Position Transmitter (CPT) Specifications:
- Output Signal: 4~20mA dc.
- Output Impedance: 7500 max.
- Position Conversion Accuracy: ±0.5 ~ ±1.5%.
ProfiBus Controller (PBC) Specifications:
- Communication: Profibus communication (RS-485 base).
- Max. Range: 1000m @ 9.6 ~ 187.5 k Baud.
- Bit Rate: Up to 12mega.
ModBus Controller (MOB) Specifications:
- Communication: Modbus-RTU (RS-485 communication).
- Supported Baud Rates: 1200 to 115200.

Usage Features:

Easy Mounting: Designed for mounting with the valve shaft pointing vertically upward, but can be mounted in any position. ISO5211 bolt patterns are provided, and the drive bush is removable for machining.
Manual Override: A declutchable hand wheel allows for manual operation by pulling the engagement lever.
Limit Switch Setting: Simple adjustment of CLOSE and OPEN limit switch cams using a hex wrench.
Potentiometer Setting: Factory-calibrated, but can be re-calibrated by rotating the potentiometer gear to achieve desired resistance values.
CPT Calibration: Zero and Span dials on the CPT board allow for calibration to achieve 4mA (closed) and 20mA (open) output signals.
PCU Configuration: DIP switches on the PCU board enable selection of input signal type, output feedback signal, deadband, deadtime, fail-safe modes (fail close, fail open, fail stop), auto full action, and reverse mode.
Auto Setting Function: The PCU board can automatically set the actuator's positions by pushing the ASCAN button, with LED indicators showing the progress.
Manual Operation Mode: Allows manual control of the actuator's open and close positions via ZERO and SPAN buttons on the PCU board.
LED Display: Provides visual feedback on the actuator's status (Open, Auto, Close, Fault) and error conditions, aiding in troubleshooting.

Maintenance Features:

Regular Inspections: Recommended every six months, or more frequently in severe conditions.
Visual Checks: Inspect for external damage, proper alignment with the valve, secure wiring, tight screws, and cleanliness of internal electrical devices.
Condensation Check: Verify the absence of condensation and proper functioning of the internal heater.
Seal Integrity: Check enclosure O-rings for damage and proper seating.
Declutch Mechanism Check: Verify proper operation of the manual override.
Wiring Diagram: Detailed wiring diagrams are provided for various models and power configurations (1Ph, DC, PCU), facilitating electrical connections and troubleshooting.
Troubleshooting Guide: A comprehensive section addresses common issues such as the actuator not responding, operating erratically, or failing to operate despite power supply, with suggested countermeasures.
Grounding: Instructions for internal and external grounding connections are provided, emphasizing the importance of proper grounding for safety and performance.
Parts Replacement: Emphasizes the use of original spare parts for seals and other components.
Explosion Proof Considerations: Specific warnings and instructions for working in potentially explosive atmospheres, including requirements for certified cable glands, blanking elements, and surface cleaning.
Cover Bolt Tightening Torque: Specified tightening torques for cover bolts (e.g., M8 x 35: 12.5 Nm, M12 x 55: 42.0 Nm) to ensure proper sealing and safety.