Electronic Equipments

Krishnaa Energy have experience in design, manufacture, testing, supply, tranportation, installation and commissioning of 33/11 KV outdoor substation.

We have also designed and erected packaged substations.

We have in depth knowledge and implementation experience at various sites with scope of providing, installing, testing and commissioning of
 

• Circuit Breakers
• Isolators without Earth Switch
• Isolators with Earth Switch
• Lighting / Surge Arrestors
• Surge monitors
• Transformers
• Control relay panels
• Over head ACSR conductors / IPS aluminium pipes
• Disk / Post insulators
• Bushings
• Single core and three core HT cables from transformer secondary to indoor/outdoor switchgear
• Control Cables
• All civil structurals and support structures for electrical equipments
• Firewall for transformers
• Oil Drain pit for transformers
• Cable trench for power and control cables
• Earth electrode, earth grid and interconnection to earth grid
• Yard lighting
• Fencing / gates 

 

Krishnaa Energy has established a state-of-the-art facility in manufacturing HT (MV) outdoor kiosk. We are specialized in meeting the technical requirements through design, manufacture, test and supply of H.T. switch boards with all accessories for efficient and trouble free operations.

Construction:

The panel's are metal-enclosed, free-standing compartmentalized, Modular type suitable for indoor and outdoor installations. The Panels are dust and vermin proof and the enclosure shall provide a degree of protection of not less than IP- 52 and IP-54.
The Panel boards are fabricated out of adequate thickness mild steel Structural sections. The frames shall be enclosed with cold rolled steel of not less than 2.0 mm thickness. Each cable chamber has cable entry from Top or Bottom with suitable removable gland plates. The cable chamber is provided with suitable supporting arrangement between the gland plate and terminals. All covers, doors and Joints are gasketted using neoprene gaskets.


Busbars:

All the busbars are air insulated and made up of high conductivity, Tin coated copper or Electrolytic grade Aluminium. Busbars have a fault withstand capacity of equivalent to 25 KA/35Ka/50kA 1 Sec matching with the rating of the incomer circuit breaker as mentioned or as required. All bus bars are fully screened by means of PVC sleeves in their own compartment running throughout the length of the panel and the busbars are Provided with holes for future expansion. Suitable segregation will be provided in between busbar chamber and adjoining compartments. The busbars will be TP and N, the section of the neutral bus being full Size or Half the size of the phase busbar as per the requirement. The busbar will be PVC sleeved with colour strips of red, yellow, blue and black .The busbar will be properly segregated, suitably braced with insulated Supports (DMC/FRP/SMC) placed at appropriate intervals to withstand the electro magnetic stresses during short circuit. Minimum electrical Clearances will be maintained between phase, neutral and body as per IS and IEC standards.

Control wiring:

Panel will be supplied with all internal wiring comprising of PVC insulated 1.1 KV grade, multi strand flexible copper conductor of 1.5Sq.mm cross section. Wiring associated with a particular phase will be the colour of that phase viz. Red, Yellow, or Blue, wiring associated with earthing will be with green colour insulation and for neutral it shall be with black colour insulation.Wiring will be neatly laid and run on insulated cleats of limited compression type insulated straps. All the cables have crimped terminations and it will be identified by means of glossy plastic ferrules at both ends, showing the wire number as indicated in the submitting control diagrams.

Earthing:

All the metal parts of all equipment supplied with in the panel (including doors and gland plates) other than those forming part of all electric circuit, will be connected by means of independent earth Conductors to continuous copper earth bar of size as required by the client. All the doors in the panels are earthed with the studs welded in the doors.

Labeling:

Labels will be provided to identify every Instrument, or other item of equipment mounted internally and externally. Switch positions will be fully identified. Wording will be clear, concise and unambiguous.The labels will be engraved with white letters in black background. Labeling plays an important role for maintainence of the panel after installation, so care is taken to denote appropriately.

Krishnaa Energy has invested in CNC machines for providing state-of-art panel products and cable trays to its customers. We are manufacturing all possibilities of a typical cable tray layout namely,

• Straight Section
• Cable Tray drop
• 4-way junction
• T-Junction
• L-Junction
• Reducer

We use G.P. (Galvanic Primer) sheet for manufacturing the cable trays and we undertake orders for perforated type, ladder type or box type (Un-perforated) as per the requirements of the client.


The Perforated Tray is manufactured from the pre-galvanized sheet metal and the tray is designed for a uniform load of at least 200N per 1000 mm tray.

The trays shall be fabricated in a length of 2.4M.

The perforated cable trays shall be manufactured from good commercial, high grade strength.
GI sheet steel having minimum thickness of 1.6mm up to 300mm tray and 2mm thickness for 450mm, 600mm and 750mm which can be used for indoor/out door use having moderate humidity and air pollution.

The zinc coating surface with a approximate thickness of 80 micron.

All manufacturing process including punching, cutting, bending and welding of perforated cable trays will be finished and burrs are removed before dispatch.

The joints of two trays will be butt construction and the joints will be coupled with the help of coupler plates by nuts and bolts.

The coupler plates, nuts and bolts will be properly hot dip galvanized, where the bends of the trays are required at site the same shall be supplied without any extra cost.

While adopting the modules at site if cutting of any length is required the same will be cut at site and joined by nuts and bolts with the help of coupler plates.

The perforated cable trays will be supported on the supporting arrangement made approximately at a distance of 0.1 to 1.2m center to center either from ground/wall or ceiling.

However, the supporting system shall be designed as per site condition.

The brackets and supporting system shall be painted with two coats of zinc chromate primer followed by two coats of synthetic enamel paint.
The perforated trays are free from sharp edges and burns.

The perforated trays will be installed in such a way that as far as possible the Cables can be laid directly in place rather than be pulled through. The cables shall be fixed in the perforated trays by means of plastic ties or plastic coated wires etc.

Krishna make Triple pole load break switches and isolators are available between voltage ranges of 3.3 Kv to 11 Kv with current rating to a maximum of 630 /1250 Amps. Load break switches and offload isolator complies to the international standard IS 9920/IS 9921 and IS 3427

Salient Features:

• Type tested at CPRI as per IS 9920/9921 & IS 3427
• Simple and rugged construction
• Quick make and break snap action
• Compact design
• Also available with fuse provision (Short circuit protection)
• Load break switch with Earth switch (fully interlocked)
• Tubular arc chutes for better arc extinction.
• Manual /Motorized versions.
  

ACCESSORIES:

Shunt Trip coil:

Shunt trip coil release is available for spring charged version of Load

Break switches, which can be used for local/remote tripping functions. Shunt coils are short time rated and available for voltage ranges 24 to 220 V AC/DC

HRC Fuse protection

HRC fuse provision for short circuit protection can be opted. HRC fuses

Provided can be either Din type or TAG type, which can be used for various power distribution systems. Rating of HRC fuses varies according to the type of application.

Earth Switch

Earth switch with manual operation can be provided with or without

interlocking with Load Break switch. Mounting of Earth switch can be made as per requirement (in incoming or outgoing side or at the bottom of the fuse base)

Individual Earth switch for switchgear applications can be given on request and Earth switch is type tested at CPRI.

Auxilairy Contacts.

Auxiliary switches of configuration 1 NO + 1 NC to 4 NO+ 4 NC

can be given along with Load break switch or isolators.

Our Nurse Calling System was designed based on a detailed market input and considering the demerits of the current scenario of such implemented systems. Listed below are few highlights of our system. 

• No Wiring between Rooms / beds / toilets and Nurse Station.
• A major cost is involved for wiring between the bed / toilet and nurse station which is eradicated in total.
• Not necessary to have nurse station in the same location. Can change the location of nurse station in future, based on the demands of infrastructure improvement. No additional cost involved for shifting the nurse station, as it is not wired and terminated to a single point.
• User-friendly features and easy understanding for nurses with very minimal onsite training.
• Provision to call Doctor / Extra assistance
• Provision to send SMS on a hierarchical basis (up to 3 levels of hierarchy), if a CALL is not attended.
• All CALL’s are time-stamped and history available
• System generated reports available for hospital authorities
• Provision to spell room number / bed number ON CALL
• A customized door unit to indicate the CALL Status (CALLED AND NOT ATTENDED – RED, CALLED FOR EXTRA ASSISTANCE – AMBER, CALLED A DOCTOR – BLUE, CALL ACKNOWLEDGED / ATTENDED – GREEN)
• A completely configurable individual gadgets (Bed unit, Toilet unit, door unit, Remote unit)
• Any of the above units can be interchanged between various rooms by the hospital authorities and re-configured in the software. Dependency on vendor reduced to large extent.
• A complete open-source software
• Software scalable to any extent and can be integrated easily with Hospital management software
• Merging of nurse station, changing of rooms from one nurse station to another, changing of bed /toilet unit from one room to another can be done through the software easily.
• High level of Security provided in the software – Avoid tampering of Records
• Generate any reports based on CALL – Customized as per client’s requirement.
• Colors displayed in the application – customized as per client requirement
• Volume control along with Mute of voice provision as per client’s requirement.
• Can provide change of CALL tones
• Configure time taken for forwarding a call to next level of hierarchy through SMS. This time can be changed directly by hospital authorities without addition of any hardware / software.
• The front fascia can be modified as per client’s requirement. However, we would like to retain the same size.

• Bed Unit – 4 Module switch box size

• Toilet Unit – 4 Module switch box size
• Door Unit – 1 Module switch box size

If a display unit is to be provided in the corridor or in a common location with identifications of a nurse call, it can be done with a 24 inch monitor (supplied by us) which shows the different status through Light indictions

• CALL from bed
• Doctor CALL
• Extra assistance CALL