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Raychem High Current Rectifiers |
Being quality oriented company, we always try to deal, supply and wholesale only the best quality High Current Rectifiers, which are manufactured using best quality raw materials for maintaining maximum performance of High Power Rectifiers. These unmatched quality products are obtained from Raychem, a highly established and reputed manufacturer and supplier of High Voltage Rectifiers. Raychem range of products, which are dealt and supplied by Power Cable Corporation are best in quality, strong in durability and high in performance. These Rectifier Systems are available at very cost-effective prices.
Features
Controls:
Variac Controlled (Stepless):-
- The working of the rectifier can be controlled using a stepless variac and the output can be controlled from zero to the rated value.
Static Variac Contolled:-
- The working of rectifier can be controlled smoothly using back-to-back thyristor at input side. By controlling the firing angle of thyristor, output of rectifier can be controlled.
Thyristor Controlled:-
- The rectifier out-put can be controlled using thyristor at secondary of the transformer. The Thyristor Rectifier can be provided with 6, 12, or 24 pulse configuration.
Type of Cooling:
The cooling system is designed and developed to guarantee reliability, durability and optimum performance of the rectifiers. In high atmospheric temperature and in highly corrosive conditions, “Natural oil cooled” (ONAN) is recommended. In this system significant mechanism like transformer; choke, diodes etc are immersed in an oil tank for cooling. If the rectifiers are fitted in a room with proper ventilation, then “Natural Air Cooled” scheme can be installed. For Rectifiers of high rating “Forced Air Cooling” is preferred. Under this system, the internal components are cooled using a blower fan.
Transformer:
The transformer used in the units are rugged and of robust construction. They are applied to step up or step down the input supply. They are available in both, oil cooled as well as air cooled/forced cooled type. In hexa phase Rectifier Units, an interphase transformer is used. It is connected between two star points of the secondaries of main transformer.
Protection:
Following protection schemes are generally deployed:
- Electric DC over voltage/over current
- Semiconductor fuses for rectifiers
- MCB / MCCB at Input or Output.
- Snubber circuits for devices.
- Temperature control for devices and transformer.
- Phase sequence and phase loss protection
Digital Controller:
The unit can also be controlled by a Digital Controller. The digital controller comprises of a keypad for operation and an LCD screen for display of various parameters. The Digital Controller is applied in control schemes where precise control is required. The Digital Controller is equipped with an RS 232/485 interface for external communication.
- I/p Voltage
- O/p Voltage
- Upto 500V or as per customer requirements
- O/p Current
- Upto 50KA or as per customer requirements
- Ripple
- Upto 5% at rated load or as per customer requirements
- Efficiency
- For Thyristor controlled units above 90%
- For variac controlled units above 87%
- Protection : -
- MCCB at input supply
- Over temperature for transformer & power devices
- Semiconductor fuses for power devices
- Voltage transient protection for devices
- Output short circuit
- Enclosures
- Indoor/Outdoor units with Ingress Protection upto IP 65
- Cooling
- ONAN / Forced air / Natural aircool
- Standard
- Conforming to IS-4540 standard for rectifier & IS 2026 standard for transformer
- Indication : -
- Three phase pilot lamps (LED type)
- Digital DC Voltmeter and Ammeter
- Other alarms
- With external PLC signals
- (MIMIC) as per With external SCADA signals required Interface
Salient Features - Five limb core or IPT construction for compact size
- Fully tropicalised design
- Unit rated for continuous duty
- Microprocessor based controller for better reliability
- Ambient Temperature
- Relative Humidity
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