Introduction; Description; Application - GE IFC51AD Instructions Manual

These instrur fons plus those in the included book, GEK-45375, form the instructions for these relays .
The Types IFC51AD, IFC53AD and IFC77AD covered by these instructions are similar respectively to the
IFC51A, IFC53A and IFC77A in the included instructions except that the target seal-in units have two elec­
trically separate contacts.
IFC53B and IFC77B except that each target seal-in and instantaneous unit has two electrically seoarate
contacts. The internal connections are included in these instructions as tabulated below:
The application areas of these relays are the same in all respects to those covered by the APPLICATION
section in the included instructions, GEK-45375.
instantaneous overcurrent unit when present, is intended for local alarm and/or remote indication as shown
on the typical external connections in Figure 3 of these instructions.
All other sections of the included book, GEK-45375, also apply to these relays.
These instructions do not purport to cover all details or variations in equ ipment nor to provide for
every possible contingency to be met in connection with installation,
further information be desired or should particular problems arise which are not covered suffi ciently for
the purchaser's purposes,
To the extent required the products described herein meet applicable
but no such assurance is given with respect to local codes and ordinances because they vary greatly.
GEK-49827
OVERCURRENT RELAYS
IFC51 AD and 51BD
IFC53AD and 53BD
IFC77AD and 77BD

INTRODUCTION

DESCRIPTION

The Types IFC51 BD, IFC53BD and IFC77BD are similar respectively to the IFC51B,
Types
IFC51AD, -53AD, -77AD
IFC51BD, -53BD, -77BD
A PPL
the matter should be referred to the General Electric Company.
TYPES
Figure
1
2
I
CA T I O N
No te that the second contact on the seal-in unit, and the
operation or maintenance.
3
ANSI,
NEMA
IEEE and standards;
Should