3-8 ALPS Advanced Line Protection System
GE Power Management
3.3 PRINTED CIRCUIT BOARD MODULES 3 HARDWARE DESCRIPTION
3
3.3.6 MAGNETICS MODULE
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.
Figure 3–6: BLOCK DIAGRAM OF THE MAGNETICS MODULE
CURRENT
TRANSFORMER
CURRENT
TRANSFORMER
CURRENT
TRANSFORMER
POTENTIAL
TRANSFORMER
POTENTIAL
TRANSFORMER
POTENTIAL
TRANSFORMER
(** Optional)
POTENTIAL
TRANSFORMER
SERIAL
EEPROM
TERMINAL BLOCK
DSP / ANI CONNECTOR
(FACTORY PROGRAMMED VALUES -
NOT FIELD SERVICEABLE)
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