Littelfuse PGA-1100, PGA-D1100 User Manual

Protection Relays & Controls

Accessory for Arc-Flash Relays

PGA-1100 DIODE LOGIC

Diode Logic

Ordering Information

ORDERING NUMBER DESCRIPTION

PGA-1100.0010

Diode logic unit

Description

The PGA-1100 Diode Logic module is an optional accessory
for the Littelfuse Arc Flash Relays.

It is used in installations with more than one breaker and
more than one Arc Flash Relay. Purpose of the unit is to
separate the trip paths, so the breakers can be tripped
independently from each other.

Typical applications are a switchboards with two incoming
feeders and one tie breaker or switchboards with several
protected zones and tripping of a common upstream circuit
breaker.

The unit has three input diodes to handle the outputs of
three Arc Flash relays and three output diodes to handle the
trip coils of three circuit breakers. If more than three relays/
circuit breakers are needed, more units can be added by
connecting terminal 8 of one box to terminal 4 of the next
one, thus increasing the number of inputs and outputs with
multiples of three.

For more application information please refer to the arc flash
relay manuals.

Simplified Circuit Diagram

1 2 3

4

5 6 7

Specifications

Diodes 1000V reverse voltage, 3A continuous, 25A for 1 second

Certification CE

Dimensions H 70 mm (2.76”); W 20 mm (5.9”); D 80 mm

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© 2014 Littelfuse Protection Relays & Controls

Rev: 1-A-030314