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JU Series Single-Phase Thyristor Regulators
The JU series small and lightweight thyristor regulators for single-phase loads are characterized with high panel installation density.
Two control systems, a phase-angle firing system and a zero-cross firing system, are built in and can be changed by remote contacts signal.
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To control the temperature of electrical heating system using contactors and solid state relays is a simplest method of controlling. However, for heater load requiring gradual and smooth power regulation or for control using the step up or step down transformers, the thyristor power packs featured here are widely used. Incorporating the thyristors for heater power control, ensures steady control and enhances the life of the heaters. Single phase and three phase models are available for single phase load and three phase load in star or delta configurations. Special features allows facility to limit the voltage, current to the desired level and soft rise / fall of the voltage across the load at the desired rate. To suit OEM requirement, only SCR / Triac triggering cards can also be offered along with the wiring details to enable them to make their own thyristor power pack.
APPLICATIONS
For power control of electrically heated furnace, oven, chamber etc...
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The MEW range of controllers are designed for regulating a three phase supply, using the phase-angle control principle. There are a number of versions available and choice depends upon the preferred method of control. The simplest units are used in conjunction with potentiometers or analog signals that provide the set point to give voltage, current or power regulation. Microprocessor control provides more functions for customising, through a digital front panel and also the ability to operate from standard field bus systems such as Interbus or Profibus.
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- Contact free and safe
- High degree of efficiency
- No wear
- Built-in semiconductor fuse
- Integrated soft start for transformer use
- Load circuit and self monitoring integrated
- Single phase, Three-phase twin leg configuration
- System iInterface via busmodule
Applications
Switching of ohmic as transformer load for
- Industry- diffusion- drying furnaces
- Extrusion and plastic presses
- Pipe-heating and pre-heating systems
- Glass manufacture and processing ( melting, feeder, refining)
- Paint- and laquer drying
- IR drying (printing machines)
- Shrink tunnel (packaging industry)
Main attributes
Full oscillation cycle and phase angle mode
QTM0=rapid half cycle for IR load
switching of ohmic load for AC ranges
230 V, 400 V, 500V
Load current 8 up to 280 A
Control input 0(4)...20 mA, 0...5/10 V
Fault signalling
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Power factor regulator PFC 12 (12 steps) measures cos φ of a supply system and control the automatic connection and disconnection of compensation capacitors according to desired cos φ.
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NOVAR 1xxx-line power factor controllers are fully automatic instruments designated for optimal compensation of reactive power. They are suitable for PFC application which requires precise control even under low load.
Characteristics
- 6 or 14 relay outputs + alarm relay
- Measuring current sensitivity 0,002 A
- Embedded temperature sensor, cooler fan/heating control
- Front panel 144 x 144 mm with high efficient LED-display
- Optional communication interface
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SOLID STATE POWER CONTROLLERS UPMO UPMF UPTO UPTF
SCR Power Controllers to regulate resistive or slightly inductive electric heaters in thermal processes.
Availables in single-phase and three-phase, and two control modes each one with zero-cross and phase-angle firing control.
· Single or 3-Phase operation up to 440 Vac lines
· Silent operation and long cycle life with no maintenance
· Two control modes zero-cross or phase-angle firing
· Currents rates from 45 A to 400 A
· Firing Control by Logical Vdc or Analog 4-20 mA signals
· Refrigeration with cooling fan for high current rates
· dv/dt transient and transitory protection
· Compatible with DESIN temperature controllers
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Features/Benefits:
- COTS Solid State Power Controller
- 10-25 Amp, 28VDC
- Short Circuit Protection
- Overload Protection
- Trip Characteristics to MIL-STD-1760
- Trip status to indicate overload events
- Meets surge and spike requirements of MIL-STD-704A
Description:
The PC605 Series are true COTS, non-hermetic Solid State Power Controllers (SSPCs) designed for use in Power Management and Power Distribution applications. Utilizing the latest technology, the PC605 provides low ON Resistance with complete short circuit and overload current protection. In addition, status output lines are provided for trip condition and load voltage to enable load monitoring and BIT (built-in-test) features.
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Watlow solid state power controllers complement the rapid switching required by PID temperature controls and help deliver optimum system performance and service life. Available in 1-phase and 3-phase/2-leg and 3-leg configuration, Watlow power controllers meet most industrial heating applications. Random, zero cross or phase angle fire options match power controller to the application requirement. DIN-A-MITE® SCR power controllers provide a convenient DIN rail mount package in current ratings from 18 to 100 amperes – a good replacement for equal mercury displacement relays. QPAC SCR power controllers rated up to 1,000 amperes for those large process heating applications. POWER SERIES microprocessor based SCR power controllers with ratings from 65 to 250 amperes. The POWER SERIES offers extensive system and heater diagnostics features and agency approvals. SERIES CZR is a CSA, VDE and UL® recognized contactor with ratings from 18 to 50 amperes single phase. Single solid state relays from 10 to 75 amperes. E-SAFETM relay is a 3 pole hybrid solid state/mechanical relay with current ratings of 20 and 40 amperes and is UL®-508 listed and C-UL®. E-SAFE is a good mercury displacement relay replacement in the amperages it serves.
Applications
Semiconductor processing
Plastics processing
Heat treating
Drying ovens
Foodservice equipment
Petroleum/chemical
Lighting equipment
Glass processing
Furnace/oven
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The 977CM - Current Monitoring Pulsed DC Controller, brings together powerful long-range ionisation; closed-loop feedback; self-monitoring and remote reporting. A complete package, unique to Meech. Self-monitoring and adjustment of performance allows optimum control of static for much longer periods than previously possible. Local display and output signals alert operators to the need to clean the equipment.
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The Model 233v3 Pulsed DC Controller has been designed to operate with the Series 200 range of ionisers for ESD applications. The 233v3 is light, compact and features lockable plug and socket connectors for quick release. It also provides the option of Steady State DC (SSDC) output.
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The Model 977v3 Pulsed DC Controller has been designed to operate with the full industrial range of Meech Pulsed DC static elimination equipment. It is light and compact but able to cope with the most technically demanding industrial applications. In addition to the ability to control power output, frequency and polarity, the 977v3 also offers alarm and remote monitoring and control functionality. A new feature of the 977v3 is an 8- way DIN for connection of an ion balance sensor and feedback system. Patent No. ZL200530000278.0
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As a major Original Equipment Manufacturer and Supplier of turn-key plants, ALSTOM Power Service delivers not only after sales service for the key components, but also a broad spectrum of instrumentation and control as well as plant information systems solutions that allow to modernise plant control and improve and optimise your power plant business.
Instrumentation and Control Systems (I&C) perform the functions of regulation, protection, control, monitoring, alarm and information management on your power plant. It is a central information system that enables plant operators to supervise the plant effectively and to make the right decisions in time, and it ensures fault free operation of your plant. Therefore, state of the art I&C is beneficial and vital for plant information, decision making, competitive high end performance and high reliability of the plant.
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This decentralized control system applies personal computers to a high degree in order to obtain an extremely high cost-performance ratio in process control.
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The NORTECH TT offers an excellent and increasingly cost-effective solution for direct, accurate and real time hot spot temperature measurement of power and distribution transformers.
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Tide Powercon electronic intelligence power controller has inlaid high performance computer chips and various functions, such as measurement, control, protection and remote control all in one, and the controlling program and protective parameters can be changed, completely satisfying requirements of users and professional assembly factories on automatic control of different generator sets.
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PowerAGC 2000 Power Plant Control System
The PowerAGC 2000 Power Plant Control System is designed according to the specific requirements of a power system, combining the most advanced technology and Wescon's 10 year engineering experience. It has been widely used in Tianwan nuclear power plants and in more than ten power plants in China. With metering, control and signaling all integrated in one, PowerAGC 2000 is designed specially for power plants, It consists of two parts, the first being the main control level which is provided by two redundant D200 SMU, and the second level which is bay level control, provided by D25 devices.
functions & Features:
- With reliable AGC function, the dispatching center sends AGC commands to DCS and SIS directly by a communication host (D200)
- The bay level device (D25) communicates directly with communication hosts of both the dispatching center and the backup center by linking directly to Ethernet
- Utilizes latest technology and design techniques to improve system reliability
- Supports remote control, substation system control and local control with high reliability
- Performs synchronization checks
- Locks Local or Remote operations, and inter-locks the operations between units
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