Thytronic XMR-D User Manual

FUNCTION CHARACTERISTICS
353
— Circuit breaker supervision (Side H and Side L)
Preface
Several diagnostic metering and monitoring function are available:
• By means 52a and 52b auxiliary contacts, the CB position is acquired. Depending on such information
the Open and/or Close commands can be safely issued by user.
• An adjustable threshold can be set for a wear estimate of the breaker contacts; the current values
(SI or SI
2
) are summed and compared to a user-adjustable threshold. When the threshold or the
number of operations is exceeded the relay can activate an output relay. The function helps to
adjust maintenance planning.
• By means 52a and 52b auxiliary contacts, the opening time is calculated and compared to a user-ad-
justable threshold. If the threshold is exceeded the relay can activate an output relay.
Operation and settings
According to the conventional contact position
• 52a is the auxiliary contact that is in the same position as the circuit breaker, (52a open = CB open),
• 52b is the auxiliary contact that is in the opposite position as the circuit breaker, (52a open = CB
closed).
To acquire the CB position, the 52a and 52b function must be set inside the Set \ Inputs \ Binary
input menus. The IN1 tON, IN2 tON, IN1 tOFF and IN2 tOFF time delays must be reset to zero
and the Logic parameter must be set to Active-ON inside the Set \ Inputs \ Binary input menus.
CIRCUIT BREAKER COMMANDS
Two output relays can be set to command CB opening and closing; the
CBopen-Kand CBclose-K
function must be set inside the Set \ Circuit breaker supervision \ LEDs-relays allocation menu; the
CB position can be visualized by means two LEDs (
CBopen-Land CBclosed-Lparameters).
All the parameters are common for Profile A and Profile B.
Fun-CB-position.ai
Towards CB diagnostic
TRIPPING MATRIX (LED)
52a ON/OFF
t
break
0T
t
break
CB monitoring
Opening transition
52b ON/OFF
52a
52
52b
+UAUX
-UAUX
52a
52b
Binary input INx
T 0
INx t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx t
OFF
Binary input INx
T 0
INx t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx t
OFF
=1
Logic diagram concerning the circuit breaker diagnostic function
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021

Thytronic XMR-D Specifications

General

Brand	Thytronic
Model	XMR-D
Category	Protection Device
Language	English