Three Phase Voltage Stabilizer
PC PC-SVC Three Phase series Voltage Stabilizer has the low energy consumption,the over voltage protection,the low voltage protection,the over-current protection,the over-loading protection,the over-temperature protection and so on.It boasts for many kinds of protections,the collection energy conservation and the environmental protection ect.This is a brand-new concept product which possess many new technologies!This series products simultaneously ha applied for many technical monopolies
We already applied many kinds of this products patent, and the technical patent NO: 200720036394.1 and Appearance paten NO: 200730025909.3
2. Use for equipment:
Computer
Test equipment
Light system
Safe alarm system
Ray equipment
Medical equipment
Copy machine
Stereo equipment
Numerical control machine tools
Industrial automation equipment
Color and drying equipment
Test equipment
Three Phase Voltage Stabilizer,3 Phase Stabilizer,3 Phase Voltage Stabilizer,Three Phase Stabilizer zhejiang ttn electric co.,ltd , https://www.ttnpower.com
Instrument Design Selection
Instrument design selection is based on the fundamental requirement of meeting the process measurement medium and monitoring function conditions. The selected instruments should be technically advanced, reliable, easy to maintain and install, and economically reasonable.
The following general provisions are outlined in the design regulations:
1. Flow Meter Selection:
- For pipe diameters of DN50 and above, a concentric orifice plate differential pressure flowmeter is used.
- Below DN50, a rotor flowmeter is preferred. If the process conditions do not allow for this type, other flowmeters may be considered.
2. Level Instrument Selection:
- For continuous level measurement, a differential pressure level gauge is used.
- When the measuring range is less than 2000mm, a differential pressure level gauge may not be suitable. In such cases, an external float level gauge or other alternatives can be applied.
3. Pressure Gauge Selection:
- The material and type of pressure and differential pressure gauges must meet the process conditions.
- Local pressure gauges typically use standard 100mm or 150mm dial sizes.
- At pump outlets, anti-vibration pressure gauges are recommended.
- For corrosive, crystallizing, solid particle-laden, or high-viscosity fluids, diaphragm pressure gauges (such as diaphragm-sealed pressure or differential pressure gauges) are preferred.
4. Temperature Instrument Selection:
- The form, specifications, and materials of the thermowell must be clearly defined.
- Local thermometers generally use bimetallic thermometers.
- Pt100 resistance thermometers (-200 to 400°C) are preferred for general applications.
- Special measurements require specific types, and within the same factory, the number of thermal resistance types should be minimized.
5. Control Valve Sizing and Selection:
- The Cv value calculation and valve size determination must follow established standards.
- The valve type, actuator, packing, and bonnet type should be chosen based on the medium characteristics.
- Internal components and accessories should be selected according to control system requirements, ensuring safety in case of power failure.
- Material and rated pressure of the control valve must be specified, along with connection mode and sealing surface type.
6. Alarm and Interlock Systems:
- A sound and light alarm system should be installed outside the DCS alarm function.
- Emergency stop interlock systems must meet site contact and functional requirements, including implementation and realization of interlock functions.
7. Panel Selection:
- The instrument panel must meet design requirements regarding installation height, power supply, piping direction, wiring, and air piping.
8. DCS Selection:
- The DCS system must specify component types, equipment specifications, monitoring functions, redundancy, and communication protocols.
- The direction of instrument cables in the control room should also be defined.
[Image: Instrument design selection and instrument installation material statistics]
Instrument Installation Material Statistics
1. Instrument Guide Pressure Piping Materials:
- Includes all pipes and fittings from the process to the instrumentation point.
- If the exact location is not confirmed, the design quantity is estimated as the sum of quantities on the "meter installation diagram."
- If the location is confirmed, high-pressure or special material pipes are calculated with a 20% safety factor, while others are based on actual quantities.
2. Instrument Heating Materials:
- Includes steam heating and electric heat tracing materials.
- The number of electric heating cables and steam tracing tubes is taken directly from the "meter installation diagram."
3. Instrument Public Works Piping Materials:
- Covers pipes, valves, and fittings for steam, water, ammonia, etc.
- Pipe fittings are calculated based on the number of bends, joints, flanges, nuts, bolts, and gaskets.
4. Instrument Gas Supply Piping Materials:
- Includes all gas supply pipes and fittings.
- Calculations include valves, elbows, flanges, and gaskets, with some items adjusted by a percentage.
5. Instrument Pneumatic Signal Piping Materials:
- Covers multi-core and single-core cables, pneumatic tubes, and signal connections.
- Additional lengths are added for safety and flexibility.
6. Cables and Wires:
- Includes main cables, direct connection cables, and indoor control cables.
- Grounding wires are calculated with additional margins for reliability.
7. Steel Threaded Pipes and Fittings:
- Includes threaded pipes and various fittings like tees, elbows, unions, and seals.
- Calculations account for both actual and estimated quantities with appropriate multipliers.
8. Wiring Materials:
- Covers junction boxes, cable seals, terminal blocks, and labels.
- Extra quantities are included for safety and future expansion.
9. Other Materials:
- Includes cable trays, columns, angle steel, steel plates, and flat steel.
- Quantities are estimated with additional factors for flexibility and ease of installation.
This detailed approach ensures that all instrumentation and installation requirements are met efficiently and reliably, supporting the overall performance and safety of the system.
September 29, 2025