Vaishno Switchgear (P) Ltd.

Sector 11, Noida, Uttar Pradesh

• Solid State Buzzer            220VA.C/D.C.
• Solid State Buzzer            110VA.C/D.C.
• Solid State Buzzer            48VA.C/D.C.
• Solid State Buzzer            30VA.C/D.C.
• Solid State Buzzer            24 VA.C/D.C.
• Solid State Buzzer            12VA.C/D.C.

The Designed of Solid State Buzzer to provide audio annunciation. The output pitch has been carefully selected in the maximum sensitivity zone of human auditory system and the pitch is continuously adjustable over wide range giving pleasing sound to the comfort and convenience of the operator.

Application:

• Control panel.
• Control Desk.

• Salient Features: Fully Solid State. Long Life. Low Power Consumption. Generates no radio frequency voice. Protected against Polarity reversal. Suitable for operation on A.C or D.C. Exquisite appearance. Easy flush mounting for panels.
  Technical Specification: Dimension: 96X96mm. Panel out size: 92X92mm. Operating voltage range: 80% to 120% of rated voltage. Burden: 5VA in A.C, 5W in D.C. Audio output: 1W, 104DB. Thermal rating: Continuous at 120% of rated voltage. Adjustable Pitch.

• Low watt loss results into low temperature rise and considerably power saving.
• Most reliable and safe operation.
• High rupturing capacity @80KA.
• High resistance to aging.
• Low cutoff current causes least stress to downstream equipments.

• Bakelite Moulded Fuse Holder divided into 9 Groups:

  • Front connection 20A.
  • Bus Bar Connection 20A.
  • Rear Connection 20A.
  • Front Connection 32A.
  • Bus Bar Connection 32A.
  • Rear Connection 63A.
  • Front Connection 63A.
  • Bus Bar Connection 125A.
  • Rear Connection 125A.

• Current Transformer:An instrument transformer in which the secondary current, in normal condition is use, subsequently proportional to the primary current and differs in phase it by an angle which is approximately zero for an appropriate directions of correction.
• Measuring Transformer:A current transformer intended to supply indicating instruments integrated meter, relay and similar apparatus.
• Protective current transformer:A current transformer intended to supply protective supply.

• Technical Specification Connection: Two connections on each side. M4 screws with self lifting clamp strap assembly. Insulation Class: E (120*C Max.). Operating frequency: 50Hz. Rated Burden:1, 1.25, 1.5, 2.5, 3.75, 5, 7.5, 10, 12.5, 15, 20, 30, 45, 60, 100VA. Ambient Temperature:-20*C to +45*C. Thermal short circuit current:40XIn for wound type CT and 60XIn for bus bar type CT. Instrument security factor: 2.5, 5, 10. Accuracy Class: 0.1, 0.2, 0.5 and 1.0.
  DC SHUNTS
  "VAISHNO CFG" Make DC Shunts are available for current ratings from 5A to 15000A with mV drops of 50-150mV. DC shunts are manufactured with Stringent Quality Control confirming to IS: 1248. Shunts consist of manganin rods/wire/strips soldered or silver brazed to Brass/Copper Blocks. The Shunts are artificially aged after manufacturing, and then tested on full load.
  Technical Specification
  Accuracy Class:1 or 0.5. Over Load:Shunts are capable of withstanding temperatures up to 120*C without any permanent alteration in physical or electrical properties. Over loads and faults which results in temperature of this magnitude can be safety handled. Temperature Coefficient: 0.002% per degree centigrade, above ambient temperature in still air, with free ventilation, temperature not exceeding 120*C at the centre and 90*C at the ends. Insulation: Shunts are supplied un-insulated and protection against contact should be installed where applicable. Over Loads (Brass Ended):Continuous 1.2X Rated Current, 5seconds 4X Rated Current up to 30Seconds. 5Seconds:10X Rated Current up to 5Seconds Ambient Temperatures- Calibration- 20*C Working Range-20*C+60*C.
  Application
  Shunts are used for measuring current in DC Applications by connecting them to moving coil panel meters, Digital meters or other measuring device. Shunts can also be used in control devices such as power supplies and battery chargers or for load protection.

• Analog Ammeter:The ammeters measure in amps the current flowing through an electrical circuit.
• Analog voltmeter:The voltmeter measures in volts the potential difference of an electrical circuit.

• Common Techinical Data

  Accuracy: class 1.5.Ferromagnetic devices. Scale length: 80mm over 90*.Mounting in enclosure or cubicle. Maximum operating position: 30*/vertical. Temperature: Operation -25*C to 50*C. Influence of temperature on accuracy: +-0.003%/*C. Utilization frequency: 50/60HZ. Ammeter specific technical data: Need an In/5CT to be ordered separately. Interchangeable dials to be ordered separately. Consumption: 1.1VA. Permanent overload: 1.2In. Maximum overload for 5s: 10In. Voltmeter specific technical data : Consumption: 3VA. Permanent overload: 1.2Un. Maximum overload for 5s:2Un.