Instantaneous Voltage relay block VAG21 With (12)

Features :-
• Simple and robust construction.
• Positive action without chatter.

Benefits :-
• Wide range of Voltage setting
• High drop off/pick up ratio
• Reliable protection for generators,capacitors etc

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

Relay type VAG is a standard attracted armature relay with a fixed setting. The simplicity of construction provides ease of maintenance and adjustment. Certain applications require a high drop off/pickup ratio can be supplied by using
a dc coil with an internally mounted bridge rectifier and an auxiliary VAA relay. A surge suppression module is incorporated in such relays for protecting the diodes against higher voltage transients. Type VAG 11 is a single pole relay. Type VAG 21 is a type VAG 11 relay with an auxiliary unit type VAA 11.

1. Voltage Ratings
Relays can be supplied suitable for operation on any system voltage upto 440V ac or dc. Standard voltage ratings are 30, 110 or 220V dc and 63.5,110 or 240V ac 50 HZ.

2. Over Voltage Relays
VAG 21 :- Ac or dc relays can be supplied to operate at 110% or 120% or 130% or 140% of the nominal voltage.

3. Under Voltage Relays:
VAG21 :- Ac or dc can be supplied to operate within the range 25% to 60% of the nominal voltage.

Type VAG 11 standard ac or dc over voltage relays with resetting value below 80% of the voltage setting. Dc or rectified ac over voltage relays type VAG21, can be supplied having a fixed resetting value between 20% and 90% of the voltage setting as desired. Type VAG 11 standard ac under voltage relays will reset at any value above 125% of the voltage setting dc or rectified ac under voltage relays type VAG 21 can be given a fixed resetting value between 110% of the voltage setting and the nominal voltage as desired. Type VAG 11 standard ac or dc no voltage relays will reset at any value below 90% of the nominal voltage.
Standards over voltage and under voltage relays type VAG 11, ac or dc are fitted with two pairs self reset ‘normally open’ contacts or one pair ‘normally open, and one pair ‘normally closed, self reset contacts. Type VAG 21, dc or rectified ac over voltage and under voltage relays can be fitted with three pairs output S/R contacts, in combination of three pairs ‘normally open’ or two pairs ‘normally open’ and one pair ‘normally closed’ or two pairs ‘normally closed’ and one pair ‘normally open’ contacts on the auxiliary unit type VAA 11 which is always energized by a normally open, light duty contact of the VAG 11 unit. A separate ac or dc supply is required for the auxiliary unit. Type VAG 11, ac or dc no voltage relays are fitted with two pairs of self reset contacts in the following combinations one ‘normally open’ one ‘normally closed’ S/R contacts and two ‘normally open’ S/R contacts.