Instantaneous Voltage Relays Block Vagm22uv (under voltage)

Benefits:-
• Ideal for under voltage application.
• Adjustable voltage rating
• Operation annunciation in the form of flag
• Draw out type case
• Completely dust proof by IP5X class protection

Features:-
• Adjustable setting range
• Very high drop off / pick up ratio
• Unaffected by normal variation in frequency of input voltage
• Simple and robust construction
• Positive action without chatter

Technical data :-

1. Under-voltage relay :- 40-80% adjustable in seven equal steps
2. Under-voltage relay : Maximum burden at nominal voltage (i.e. relay set at the lowest setting) is 2.5 VA.
3. Thermal rating :- The VAG unit can withstand two times the pick-up (resetting) voltage on any setting continuously
4. Resetting voltages :- Under – voltage relay : 110% of setting voltage
5. Operating times :- Under voltage relay : 0.025 second at zero voltage. These times are inclusive of the
   opetating time of the associated auxiliary unit.

Application :-
Instantaneous over – voltage protection of generators, capacitors etc., definite time under voltage protection of ac motors, automatic voltage changeover schemes and other instantaneous and definite time under voltage and over voltage applications requiring adjustable settings.

This Instantaneous Voltage Relays Block is easily insert in your schematic diagram and connect as you like way.

VAGM 22  is standard attracted armature relay with seven equal setting adjustable on a plug board. A dc coil is used with an internally mounted bridge rectifier to obtain a drop off/pick up ratio of the order of 90%. A resistance connected in series with the coil is tapped suitably and the taps are connected to the plug board to obtain seven equal setting. A capacitor is used to serve as a filter unit for the bridge rectifier and it also acts as a surge suppressor for protection the diodes of the bridge rectifier against high voltage transients. The dc coil is fitted with a normally open light duty contact which is arraged to energise an auxiliary unit which provides the necessary output contacts. Type VAGM 22 is a single pole relay with its auxiliary unit.