
PM 1001608 000 06
Device handbook LINAX PQ3000-PQ5000
64/90
Fault current detection
via plug-in terminals
Number of channels
2; each channel provides two measurement ranges (2mA, 1A)
Zero suppression
Measurement < 0.2% of measurement range
Measurement range 1A
Application:
Direct measurement of a fault or earth wire current
Measurement transformer: Current transformer 1/1 up to 1000/1A
Instrument security factor FS5
Rated output 0.2 up to 1.5 VA
Measurement range:
I
Rated
= 1.0A (max. 1.2A; crest factor 3)
Overload:
2A continuous; 20A, 5 x 1s, interval 300s
Self-consumption:
≤ I2 x 0.1 Ω
Monitoring:
Alarm limit 0.03 … 1000 A (2 up to 100% of primary measurement range)
Measurement range 2mA
Application:
Residual current monitoring (RCM)
Measurement transformer: Residual current transformer 500/1 up to 1000/1A
Rated burden
100 Ω / 0.025 VA up to 200 Ω / 0.06 VA
Measurement range:
I
Rated
= 2mA (max. 2.4mA; crest factor 3)
Overload:
40mA continuous; 200mA, 5 x 1s, interval 300s
Self-consumption:
≤ I2 x 64 Ω
Monitoring:
Alarm limit 0.03 … 1 A
Further settings
Alarm limit for OFF AUS:
I
OFF
= 90…75%
*)
Prewarning limit:
I
WARN
= 50%...(I
OFF
-1%)
*)
Prewarning AUS:
I
WARN
- (10…25%)
*)
Response delay:
1…10s, separately for alarm and prewarning
Dropout delay:
1…300s, separately for alarm and prewarning
*)
All percent values are related to the alarm limit (100%)
Interface
Ethernet
via RJ45 socket
Protocol:
Modbus/TCP, NTP, http
Physics:
Ethernet 100BaseTX
Mode:
10/100 Mbit/s, full/half duplex, auto-negotiation
IEC61850
via RJ45 sockets, 2 equivalent ports
Protocol:
IEC61850, NTP
Physics:
Ethernet 100BaseTX
Mode:
10/100 Mbit/s, full/half duplex, auto-negotiation
Modbus/RTU
via plug-in terminal (A, B, C/X)
Protocol:
Modbus/RTU
Physics:
RS-485, max. 1200m (4000 ft)
Baud rate:
9'600, 19'200, 38'400, 57'600, 115'200 Baud
Number of participants:
≤ 32
Internal clock (RTC)
Uncertainty:
± 2 minutes / month (15 up to 30°C)
Synchronization:
none, via Ethernet (
NTP protocol
) or
GPS
Running reserve:
> 10 years