Siemens siprotec 7SA522 User Manual

2.19 Monitoring function
325
7SA522 Manual
C53000-G1176-C155-3
2.19.1.7 Information List
2.19.2 Trip circuit supervision
2.19.2.1 Method of Operation
Trip Circuit Moni-
toring
The 7SA522 incorporates an integrated trip circuit supervision function. Depending on
the number of available binary inputs (not connected to a common potential), monitor-
ing with one or two binary inputs can be selected. If the routing of the required binary
inputs does not comply with the selected monitoring mode, an alarm is issued (“TripC
ProgFAIL”) with identification of the non-compliant circuit. When using two binary
inputs, malfunctions in the trip circuit can be detected under all circuit breaker condi-
tions. When only one binary input is used, malfunctions in the circuit breaker itself
cannot be detected. If single-pole tripping is possible, a separate trip circuit supervi-
sion can be implemented for each circuit breaker pole provided the required binary
inputs are available.
Monitoring with
Two Binary Inputs
When using two binary inputs, these are connected according to Figure 2-143, parallel
to the associated trip contact on one side, and parallel to the circuit breaker auxiliary
contacts on the other.
A precondition for the use of the trip circuit supervision is that the control voltage for
the circuit breaker is higher than the total of the minimum voltages drops at the two
binary inputs (U
Ctrl
> 2 U
BImin
). Since at least 19 V are needed for each binary input,
the monitor can only be used with a system control voltage of over 38 V.
No. Information Type of In-
formation
Comments
161 Fail I Superv. OUT Failure: General Current Supervision
162 Failure Σ I OUT Failure: Current Summation
163 Fail I balance OUT Failure: Current Balance
164 Fail U Superv. OUT Failure: general Voltage Supervision
165 Fail Σ U Ph-E OUT Failure: Voltage summation Phase-Earth
167 Fail U balance OUT Failure: Voltage Balance
168 Fail U absent OUT Failure: Voltage absent
169 VT FuseFail>10s OUT VT Fuse Failure (alarm >10s)
170 VT FuseFail OUT VT Fuse Failure (alarm instantaneous)
171 Fail Ph. Seq. OUT Failure: Phase Sequence
195 Fail Conductor OUT Failure: Broken Conductor
196 Fuse Fail M.OFF OUT Fuse Fail Monitor is switched OFF
197 MeasSup OFF OUT Measurement Supervision is switched OFF

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English