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NON-DIRECTIONAL INVERSE TIME OVER CURRENT & EARTH FAULT

RELAY TYPE ACDG-11(1ELEMENT) ACDG-31(3 ELEMENT)

 

This relay is used to give time graded protection of electrical installations and simple line systems, such as feeder system, transformer, AC machines etc. against short circuit or against ground faults of solidly earthed system. This relay may be used as principal relay or as back-up relay.

 

DESCRIPTION/SPECIFICATIONS

The relay consists of an electromagnetic element driving an aluminium induction disc. The damping is provided by a permanent magnet mounted on Jewel Bearings.

 

Settings: Phase Fault : 50-200% in equal tap setting. 
Earth Fault : 20-80% or 10-40% in 7 equal tap setting of 5A or 1A
Starting & Closing: 100%-130% of current setting as per ISS
Thermal rating: 2 x rated current continuously or 20 setting current for 3 seconds.
Burden: 3VA at highest tap and 2VA at lowest tap.
Contacts: 2 N/O self reset plus 1 N/O or 1 N/C S/R or H/R contacts.
Auxiliary unit rating: Shunt connected 30, 50, 110, 220V DC or 110V
Operation Indicator: Hand reset type on Auxiliary Unit.
Case:

ACGD11 – 170W x 235H x 175D mm (150 x 220mm cutout) 
ACDG31 – 475w X 265H x 176D mm (435 x 222mm cutout)

 

The relay conforms to IS 3231 - 1965

 

 

AVOMEC GROUP
2AB,Bright Apartments,
7,Bright Street,
Calcutta-700019.
INDIA.
Fax:091-33-2400268
Phone:091-33-2479811
091-33-2471904
E-Mail: avomec@vsnl.com

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