Panel Type DNL-D, VSI 1/25

STANDARD FEATURES:Compact & vermin proof design.

• No fire hazard.
• Long Electrical & Mechanical life.
• Compartmentalized construction.
• Incorporates reliable vacuum technology for switching.
• Antipumping scheme. 
• Suitable and tested for rapid autoreclosing duty.
• Earthed truck for earthing bus or line. 
• Withdrawable or fixed PT (Bus or Line).
• Earthed metallic shutters with unique integral device for retaining the dead section shutter in open position and restoring usual automatic features by insertion of breaker truck.
• Double Busbar system for continuous bus rating up to 2000A and switching by single off load isolator of 1250 A continuous current rating – Ideal for process industries.
• Ideal and tested for capacitive current breaking application.

Safety interlocks to prevent:-

• Insertion of circuit breaker in ‘CLOSED ‘condition.
• Withdrawal of circuit breaker when it is in ‘closed’ condition. (Built in mechanical interlock can be unlocked only after tripping of breaker)
• Operation of circuit breaker in any position other than ‘ISOLATED‘ or ‘TEST’ or ‘SERVICE’ positions.

OPTIONAL FEATURES:

• Double Busbar system with switching through circuit breakers with horizontal or vertical duplicate breaker chambers, to ensure continuous supply on load side. 
• Self aligning control circuit plugs and socket arrangement. Automatic engagement before ‘TEST’ position while racking in and disengagement after ‘TEST’ position while racking out.
• Single convertible circuit breaker truck for earthing line or Bus.
• Integral earthing switch (for line earthing only) capable of carrying full fault current.
• 95kVp Impulse level for continuous current rating up to 1250 A for circuit breaker and panel.
• Series tripping facility.
• Emergency tripping facility (without opening front door)
• CTD for automatic tripping of circuit breaker in the event of failure of control supply.
• Maximum continuous current rating of 2000A for Incomer and Bus Coupler breakers and 1250 A for feeder breakers. 

RATING:
•    Rated Voltage ( kV )                                                  :                   11
•    Rated Insulation level (kV/kVp)                                 :                   28 /75*
•    Rated frequency (Hz)                                                :                   50
•    Rated normal current                                                 :                  630 / 1250 / 2000
•    Rated short time current (kA) for Duration (sec)        :                  26.24 for 3
•    Rated peak withstand current (kA)                             :                  66
•    Rated operating sequence                                         :                  O-0.3sec-CO-3min-CO
•    Rated control voltage DC (V)                                     :                  24 to 220 **
•    Rated auxiliary voltage AC (V)                                   :                  230