Operation Manual 37107F
MFR 3 - Multi Function Relay
© Woodward
Page 9/165
Chapter 1.
General Information
Introduction
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
The MFR 3 has been designed to provide circuit breaker and load control and protection. It is possible to monitor
both the generator and mains simultaneously. The MFR 3 permits two circuit breakers to be synchronized and
control of the mains power.
The MFR 3 starts as a standard unit that may have additional functions added with each model. The model of the
MFR 3 is designated as follows:
MFR3
S45 -h0018
B/
PSV
-ABDEF..Z
Options according to list of options:
These options can be found in the manual. Each chapter headline points out
if the described function is standard or is an option.
Model
[PSV]..Standard unit
[
PSVX
]..
Package PSVX
(=PSV + event logger, T7 analog inputs and real-
time clock)
Mounting
[B]..Flush-mounting
[M]..DIN-rail/rear panel mounting
Hardware variation
non-standard models; e.g. custom relays
Current transformer, secondary
[5] = ../5 A
Voltage transformer/PT's, secondary
[1] = 100 Vac
[4] = 400 Vac
Generator type
[S] = synchronous generator
[A] = asynchronous/inductive generator
Type
[MFR31] = unit with logic for one breaker
[MFR32] = unit with logic for two breakers
Examples:
•
MFR
31S45B/
PSVX
+
Q
(standard unit with one breaker logic for synchronous generators and is flush-
mounting, 400 Vac PT inputs as well as ../5 A CT measuring inputs; Option Q: analog or three-position con-
troller functionality selectable, and an event logger, T7 analog inputs, and real-time clock
•
MFR
32S15B/
PSVX
+
Q
(standard unit with two breaker logic for synchronous generators and is flush-
mounting, 100 Vac PT inputs as well as ../5 A CT measuring inputs; Option Q: analog or three-position con-
troller functionality selectable, and an event logger, T7 analog inputs, and real-time clock
