Iresco Electricals Private Limited

Discharge Test : Periodical discharge test on station batteries is a mandatory requirement for users. These tests ensure reliability, better service and enhance life performance of the battery system. Battery manufacturers specify Yearly / Half Yearly / Quarterly Charge / Discharge cycle tests.

Advantages : Discharge cycle tests help the users to :

1. Check initial battery performance against manufacturers specifications.
2. Avoid deterioration of battery system due to early detection of defective cells.
3. Guarantee smooth operation of back up system during emergencies.
4. Improve overall health and life of battery system.

Discharge Resistor : Our unit is designed to perform periodic discharge tests on station batteries. The resistor unit is a robust assembly consisting of Copper-Nickel Alloy wire grid elements, supported on S.S. tie rods, insulated from each other and the enclosure with Micanite tubes, washes and ceramic formers. The unique design of elements allows rapid, natural cooling of resistor bank. Castors are provided for easy mobility.

Neutral Earthing Resistors For Fault Protection

Neutral Earthing Resistors For Fault Protection
A neutral Earthing resistor restricts the flow of current during an earth fault on an AC distribution system. It is connected between the neural point of a transformaer or generator and earth. Although a neutral earthing resistor will probably be active for just a few seconds during its operational life, it musc offer dependable protection at all time in case of fault. Application can be found in power distribution, mining and industrial installations, indoors and outdoors. Iresco neutral earthing resistors are designed to cope with the most climatic conditions and saliferous atmospheres. These resistors offer distict advantages of durability and reliability. They meet IEE Standard 32-1972.
SPECIFICATION
Capacity : A neutral earthing resistor has a resistance value specified to limit the fault current within a system to a pre-determined value which is sufficiently low to prevent damage yet high enough to operate fault-clearing relays.

Each system is designed according to current and timeratings, which are specified to be compatible with the protection switch gear. The range available includes; current to 3000 amps; time to 60 secondsl and system voltage to 66kV. The resistance value is precise and determined at the manufacturing stage, remaining constant throughout life.

Materials : Irsco neutral earthing resistors are made from tough steel grids of a high quality iron-chrome-aluminium or AISI 304 SS allow. They are non-corroding and offer good electicity stability.

Features:

The design of wire and plate grid, lends itself to various advantages over conventional cast iron grids and standard wire wound resistor assemblies. In the assembly design breakable parts are excluded, resulting in robust construction. In the wire grid assemblies, the unique terminal arrangement, facilities easy replacement of individuals grid.

The assembly can tailor designed and is available in stack and panel mounting versions. This is ideal for compact design of special purpose control panels. The panel mounting versions has an added advantages of saving in interconnection and wiring.

Material : Standard-stainless steel, other alloys request.

Silicone Cement Coated Tabular Resistors from the most compact and reliable type of unit possible for rating from 10 Watt to 500 Watt. They are mechanically robust, constant in Ohmic Value and withstand the most severe conditions of humidity.

STANDARD CONSTRUCTION
High grade ceramic former.
Copper nickel and Nickel chromium alloy wires and tapes used for winding.
Self lubricating alloyed silver contact adjusted for optimum contact pressure.
Creepage proof design.
High grade silicon cement insulation.

CUSTOM VARIATIONS

Graded and/or tapped windings.
Gang assemblies up to four units.
Special shaft lengths.
Off positions at either end of winding.
Knobs, dials and locking arrangement