Insel Rectifiers India Pvt. Ltd.

Ecotech III, Greater Noida, Uttar Pradesh

The Field Failure Relay, when used in series with the field circuit, ensures that no power is supplied to the Armature unless Field circuit is complete.Field Failure Relay, also known as Field Loss Relay protects the D.C. Shunt motor or main circuit under open field conditions.

INSEL Rectifiers India Thyristors may also be necessary to act in the opening switch mode as well. Such applications may contain those where voltage is reapplied to the pulse power switch shortly after closing and the switch needs to have improved blocking capability or the transfer energy needs to be controlled. In these applications, the switch needs to have turn-off capability to decrease the natural turn-off time (tq) of the device. The device is operated in GTO mode with the suitable commutating gate drive. Thyristors may be used to bond a source of stored energy, such as a capacitor to a load, or to bypass and protect the load in the case of a crowbar circuit. In these pulsed power applications where the rate of rise of current is very fast, the pulse power switch is acting as a closing switch and ordinary phase control thyristors (SCRS) are probable to fail due to the high didt experienced?

Isolating transformer are used in Air Field Lighting system and provide isolation between the primary high voltage series circuit and low voltage secondary circuit. The primary of all transformers are connected in series and fed by constant current regulator. Secondary feeds the individual Airport Runway light.Isolating Transformer are used to maintain continuity of high voltage primary circuit in case one or more lamps are not in working order and to maintain the supply of 20 Amps. From the 6.6 amps. Series circuit or vice versa alternatively to supply 6.6 Amps. From 8.3 amps . in the series circuit.

Thyristors may also be necessary to act in the opening switch mode as well. Such applications may contain those where voltage is reapplied to the pulse power switch shortly after closing and the switch needs to have improved blocking capability or the transfer energy needs to be controlled. In these applications, the switch needs to have turn-off capability to decrease the natural turn-off time (tq) of the device. The device is operated in GTO mode with the suitable commutating gate drive.Thyristors or SCRs (silicon controlled rectifiers). The Phase Control SCR provides phase-control of ac signals with a line frequency of 50-60 Hz. The Inverter SCR is used in pulsed power applications connecting higher frequencies. The main difference between the two families is the turn-off time (tq). Inverter SCRs typically have a tq of less than 30 microseconds (s). Similar phase control SCRs has tq ratings of several hundred s.

Isolating transformer are used in Air Field Lighting system and provide isolation between the primary high voltage series circuit and low voltage secondary circuit. The primary of all transformers are connected in series and fed by constant current regulator. Secondary feeds the individual Airport Runway light.The Toroidal magnetic core made from cold rolled silicon steel, grain oriented lamination of low loss quality. The core is insulated by nylon cap or polyster paper.

insel rectifiers india thyristorsmay also be necessary to act in the opening switch mode as well. Such applications may contain those where voltage is reapplied to the pulse power switch shortly after closing and the switch needs to have improved blocking capability or the transfer energy needs to be controlled. In these applications, the switch needs to have turn-off capability to decrease the natural turn-off time (tq) of the device. The device is operated in gto mode with the suitable commutating gate drive.

thyristorsmay be used to bond a source of stored energy, such as a capacitor to a load, or to bypass and protect the load in the case of a crowbar circuit. In these pulsed power applications where the rate of rise of current is very fast, the pulse power switch is acting as a closing switch and ordinary phase control thyristors (scrs) are probable to fail due to the high di/dt experienced?

thyristors or scrs (silicon controlled rectifiers).the phase control scr provides phase-control of ac signals with a line frequency of 50-60 hz. The inverter scr is used in pulsed power applications connecting higher frequencies. The main difference between the two families is the turn-off time (tq). Inverter scrs typically have a tq of less than 30 microseconds (s). Similar phase control scrs has tq ratings of several hundred s.

thyristors or scrs (silicon controlled rectifiers).

applications:

• ups
• welding
• power supplies
• var generators
• transportation
• traction inverter
• medium voltage inverter
• flexible ac transmission
• medical
• motor control
• battery chargers
• ups systems
• induction heating

Application

Isolating transformer are used in Air Field Lighting system and provide isolation between the primary high voltage series circuit and low voltage secondary circuit. The primary of all transformers are connected in series and fed by constant current regulator. Secondary feeds the individual Airport Runway light.Isolating Transformer are used to maintain continuity of high voltage primary circuit in case one or more lamps are not in working order and to maintain the supply of 20 Amps. From the 6.6 amps. Series circuit or vice versa alternatively to supply 6.6 Amps. From 8.3 amps . in the series circuit.

Specification

• IS: In compliance with IS- 12290- 1987
• FAA : In compliance with AC- 150 / 5345-47
• IAF : In compliance with CRI/ Ale/ 107 of 1989

Construction

The Toroidal magnetic core made from cold rolled silicon steel, grain oriented lamination of low loss quality. The core is insulated by nylon cap or polyster paper.

The primary and secondary windings are of standard quality super enamailed copper wire.

The primary is a single core made from annealed, tinned, copper wire, EPR insulated and PCP sheathed, suitable for 5000V operations .One secondary, cable end is moulded with plug and other with receptacle as per Customers, s requirement.

The secondary is two core made of annealed, tinned, copper wire, ERP insulated and PCP sheathed. The secondary cable end is moulded with receptacle as per reqirement of the customers.

The isolating transformer is epoxy casted and cured under vaccum.

The Epoxy casted assembly is rubber moulded to with stand outdoor exposure, immersion in water or direct burial in earth containing concentration of oil, acids and alkalies.

Quality Control

Bidal has complete in house facility to test incoming materials which go in the manufacture of the isolating transformer. In the process quality control is supervised by highly qualified and experienced engineering staff . each and every isolating transformer leaving the factory is thoroughly tested for routine and type tests.

Performance

Thousands of Bidal make isolating transformers are satisfactorily working in the field for years.

The H and W series are the result of continuous research and development programme aimed at reliable, low-cost, compact selenium rectifier elements and stacks. High standard of quality are further insured by Westing house plants & machinery and the expert technical know-how available at Insel Rectifiers.The aluminium based selenium rectifier elements are manufactured by an improved, closely controlled vaccum deposition process. This new process ensure stable, non- ageing, low loss characteristics permitting higher current density operation while maintaining a reliability standard which has been a by in the selenium rectifier field for over thirty years.