Configuration Restriction - ABB REF 542plus Technical Reference Manual

REF 542plus REF 542plus
6.3.
44
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
Fault recorder
79 Autorecloser
32 Directional power Direction = forward, backward

Configuration restriction

There are some limitations that must be respected during the REF 542plus
configuration.
At most 24 protection functions can be configured inside the unit.
*
A protection function can activate only one single direct channel.
*
The number of direct channel is limited to 24.
*
The configuration cycle time must be below 30 ms, to guarantee the proper
*
working of the unit.
At most 1000 wires can be drawn and the connections are limited to 512.
*
Only one store object can be configured. (The store object allows storing binary
*
data between a power failure and the next start-up, see the programming manual
for more details).
At most 62 switching objects can be configured (a switching object is used to
*
represent a primary object like a circuit breaker, a contactor and so on.)
At most 15 energy counters can be configured.
*
At most 10 analog threshold objects per analog input can be configured (analog
*
threshold objects allow to undertake some actions depending upon the level of
voltage and current, see the programming manual for more details).
LCD and HMI
At most ten icons can be displayed on the LCD.
*
At most eight switching devices icons can be displayed on the LCD.
*
When binary I/O modules with mechanical relays are used, a maximum of seven
*
switching devices can be controlled.
Time before fault = 100 ... 2000 ms
Recording time = 1000 ... 5000 ms
Time after fault = 100 ... 4900 ms
Max. 5 records
Operation mode = Start and Trip controlled, Start
Controlled
Number of reclosing cycle = 0 ... 5
Reclaim time = 10.00 ... 1000.00 s
Specific/operation time first shot = 0.04 ... 1000.00 s
Dead time first shot = 0.10 ...1000.00 s
Specific/operation tìme second shot = 0.04 ... 1000.00 s
Dead time second shot = 0.10 ... 1000.00 s
Specific/operation time third shot = 0.04 ... 1000.00 s
Dead time third shot = 0.10 ... 1000.00 s
Specific/operation time fourth shot = 0.04 ... 1000.00 s
Dead time fourth shot = 0.10 ... 1000.00 s
Specific/operation time fifth shot = 0.04 ... 1000.00 s
Dead time fifth shot = 0.10 ... 1000.00 s
Nominal real power Pn = 1 ... 1000 000 kW (primary
values)
Max. reverse load P> = 1 ... 50% Pn
Op. time = 1.0 ... 1000.0 s
1MRS755859