FUNCTION CHARACTERISTICS
28
NA011 - Manual - 05 - 2022
Output relays
Four output relays are available (K1...K4) with two changeover contacts (SPDT, type C):
[1]
• K1, K2 and K4 are trip relays.
• K3 is a signalling relay.
[2]
Each output relay may be programmed with following operating mode:
•
Operation MODE
(
No latched, Latched
).
•
Logic
(
Energized/De-energized
).
To each output relay a programmable timer is matched (
Minimum pulse width
parameter).
All parameters are available inside the
Set \ Relays
menu
.
Any change to the settings can be affected at any time, also with the relay on duty, separately for
each relay.
Notes:
• When de-energized operating mode is set, the relay remains in rest condition if no trip command
is in progress.
• When energized operating mode is set, the relay remains in operating condition if no trip command
is in progress and the auxiliary supply is powered on.
• When no-latched operating mode is set (
Kx Mode No-latched
), the output relay reset at the end
of the trip condition. To each output relay a programmable timer is matched (minimum pulse width
operation).
• When latched operating mode is set
Kx Mode Latched
, the output relay doesn’t reset at the end
of the trip condition; it stays ON until a reset command is issued (RESET key, ThyVisor or commu-
nication command).
• It is advisable to make sure that the output contact technical data are suitable for load (Nominal
current, breaking capacity, make current, switching voltage,...).
Matching every output relay to any protective element is freely programmable inside the
Setpoints
submenus according a tripping matrix structure.
[3][4]
FUNCTION
RELAY
K1 K2 K3 K4
Self-test relay
I> Start relays (Start I>)
I> Trip relays (Trip I>)
I>> Start relays (Start I>>)
I>> Trip relays (Trip I>>)
I>>> Start relays (Start I>>>)
I>>> Trip relays (Trip I>>>)
IE> Start relays (Start IE>)
IE> Trip relays (Trip IE>)
IE>> Start relays (Start IE>>)
IE>> Trip relays (Trip IE>>)
Trip EXT (Remote trip)
Breaker failure
79 Close
79 Run
79 Fail
CB Close
CB Open
Self test CB
Note 1 Schematic diagram are shown inside APPENDIX B1.
Note 2 Reduced breaking capacity for the K3 relay compared to that of K1, K2 and K4 relays.
Note 3 Matching of the output relay to the protective and control functions can be defined so that any collision from other function is avoided.
All output relay are unassigned in the default setting.
Note 4 Self test relay: it is advisable to plan the following settings:
- Energized operating mode,
- No-latched ,
in order that it stays ON for normal conditions and the other way round it goes OFF if any fault is detected and/or the auxiliary supply turns OFF.
Input
No-latched operation
Latched operation
Output relay operation
Relay-operation-timers.ai
t
Minimum pulse width
t
TR