Magnetics Module - GE ALPS Instruction Manual

3.3 PRINTED CIRCUIT BOARD MODULES
The magnetics module (MGM) contains the input current transformers and voltage transformers. The MGM also contains
an EEPROM with factory-stored ALPS model information (DC voltage rating, AC current rating) and gain-calibration infor-
mation for the analog channels
The relay driver logic located on the output board contains the alarm, BFI, RI, RC, breaker close, key transmitter, and
phase A tripping contacts (or SCRs). See Figure 3–6: BLOCK DIAGRAM OF THE MAGNETICS MODULE below.
3
3-8
CURRENT
TRANSFORMER
CURRENT
TRANSFORMER
CURRENT
TRANSFORMER
Figure 3–6: BLOCK DIAGRAM OF THE MAGNETICS MODULE
ALPS Advanced Line Protection System
POTENTIAL
TRANSFORMER TRANSFORMER
POTENTIAL
TRANSFORMER
POTENTIAL
TRANSFORMER
(** Optional)
SERIAL
EEPROM
(FACTORY PROGRAMMED VALUES -
NOT FIELD SERVICEABLE)
3 HARDWARE DESCRIPTION

3.3.6 MAGNETICS MODULE

POTENTIAL
GE Power Management