Terminal Boxes

Product Details:

Details:

• Non flameproof motors fitted with this type of terminal box are installed in many Petrochemical and other important installations. 
• Weatherproof for outdoor applications including Division 2 areas. 
• Suitable for 3300.6600,or 11000 volt systems.
• Fault capacities; 33 KV 250 MVA with 400 Amps FL current.
• 6,6 KV 500 MVA with 360 Amps F current 
• 11 KV 500 MVA with 210 Amps FL current 
• Phase to phase faults eliminated
• Maximum size of stator winding cable 120sq mm.
• Replaceable indicating desiccator units (one per phase).
• Supply cable entry, any of four 90 direction 

Product Details:

Products Details:

• Flameproof motors fitted with this type of terminal box use certified by the Ministry of Power for operation in atmospheres containing Groups 1,11 or 111 gases. 
• Weatherproof for outdoor applications. 
• Suitable for 3300 or 6600 volt systems.
• Fault capacities 3,3KV, 150MVA or 6,6KV, 300MVA with 360 Amps FLC and solidity earthed neutral. With impedance earthed systems it is suitable for 250MVA at 3,3KV or 500 MVA at 6,6 KV provided the maximum earth fault i limited to 26,2KA for a period not exceeding 0,25 seconds.
• Phase to phase faults eliminated. 
• Maximum size of stator winding cable 120 sq mm. 
• Supply cable entry from virtually any direction.

Product Details:

Details:

• Weatherproof for outdoor applications including Division 2 areas. 
• Phase to phase protection.
• Replaceable indicating desiccator unit.
• Supply cable entry from above or below. 

Product Details:

Phase segregated terminal boxes to eliminate phase to phase faults. In the event of a fault developing between phase and earth in one of the glass reinforced plastic terminal enclosure, the rapid buildup of pressure will cause the enclosure to fracture across the rear wall, thus releasing hot gases and flame into the steel phase segregated compartment.
If the fault level is low, fault products will be contained within the compartment.
If the fault level is high & excessive, then the Bakelite relief disc will fail and the fault product will pass into the motor interior where it will rapidly cool and disperse by venting into the machine space phase to phase fault are thus eliminated.

7. a. Phase Segregated Terminal Box:
7. a.1 Non Flame Proof Motors Fitted with this type of terminal box.
7. a.2 Installed in many Petrochemical and other important installations.
7. a.3 Weatherproof for Outdoor applications
7. a.4 Suitable for 3300, 6600 or 11000 volt systems.
7. a.5 Fault Capacities: 3.3kv 250 MVA with 400Amps FL Current
Fault Capacities: 6.6kv 500 MVA with 360Amps F Current
Fault Capacities: 11kv 500 MVA with 210Amps FL Current
7. a.6 Phase to Phase faults eliminated
7. a.7 Maximum size of stator winding cable 120 Sq. mm
7. a.8 Replaceable indicating desiccators units (one per phase). Supply cable entry any four 90 directions.

7. b. Phase- insulated Flame Proof Terminal Box:
7. b.1 Weatherproof for Outdoor applications including division 2 areas.
7. b.2 Suitable for 3300 volt systems.
7. b.3 Fault capacity 250 MVA with 400 Amps FL current.
7. b.4 Phase to Phase protection.
7. b.5 Replaceable indicating desiccators unit.
7. b.6 Supply cable entry from above or below.

We have complete solution for High Voltage High Fault Capacity Terminal Boxes. Supply including complete range of spares and insulation, rubber components. Our products esp. Insulators, Rubber Gaskets are highly acclaimed and widely used in Motors by all OEM’s.

Product Details:

Fault Characteristics 
The amount of energy released during a fault in a terminal boa is a direct function of the fault current, the arc voltage, the number phases. involved, and the time duration. 

The fault current is determined by the design of the terminal box. Unit transformers, reactor, and neutral earthing impedances are sometimes used to limit the fault level at any particular point of the system, but they have to be designed as part of the system if stable operation is to be obtained.


The duration of a fault depends upon the type of switching and protective gear used HV • HFC terminal boxes are designed and tested to withstand a full-rated. 


Fault for 250 milli seconds and on therefore be used with normal circuit breakers and relays. Conductor sizes and joints are suitably proportioned and secured to carry fault current resulting from failure inside the mushier without damage or danger.


Construction:
The phase segregated terminal box comprises a " fabricated steel casing welded to a heavy gauge back and t plate. The outer steel case encloses an inner fabricated steel shell and steel barriers extending from top to bottom of the inner shell. The terminal box thus has three distinct segregated phase compartments, each completely shrouded by steel walls which are solidly connected to earth. The presence of the inner skin prevents an internal arc from 'flame-cutting' a hole in the outer casing and thus allowing hot gases to discharge into the atmosphere with consequent danger to personnel. As an additional safeguard the terminal is enclosed within a glass reinforced plastic moulded type enclosure. Cables from the motor interior and the intermediate the enclosure- Neoprene/cork gasket. prevent the ingress of dirt or moisture. Each compartment is fitted with a desiccator unit which provides a visual indication of moisture within the box in any phase. The desiccator unit can be removed while the motor is running.  

Additional Information:

• Item Code: PSTB