Advertisement
Communication-capable Circuit Breakers
WL Circuit Breaker
The extended protective relay functions of the metering function can monitor the following criteria and initiate a trip
if values are exceeded.
Protective Relay Function
Current unbalance
Total harmonic distortion - current
Voltage unbalance
Undervoltage
Overvoltage
Total harmonic distortion - voltage
Direction of phase rotation
Active power in normal direction
Active power in reverse direction
Under frequency
Over frequency
Table 2-8
Additional trip criteria can be set using the extended protective relay functions. A delay time can be set to prevent transient events from
causing nuisance trips: the circuit breaker will not trip unless the condition is present for longer than the delay time.
The metering function supplies the following Alarm Setpoint Functions:
Alarm Function
Over current
Over current - ground fault
Over current - N-conductor
Phase unbalance - current
Demand - current
Total harmonic distortion - current
Undervoltage
Overvoltage
Phase unbalance - voltage
Total harmonic distortion - voltage
Crest factor
Form factor
Active power in normal direction
Active power in reverse direction
Leading power factor
Lagging power factor
Demand - active power
Apparent power
Reactive power in normal direction
Reactive power in reverse direction
Demand - apparent power
Demand - reactive power
Underfrequency
Overfrequency
Table 2-9
Alarm and setpoint functions allow events to be generated when system conditions deviate from their nominal values. The generation of the
events can be delayed to prevent transient conditions from "chattering." These alarms are communicated via
to close in the configurable output module and can freeze the waveform buffer in the metering function. Alarms are communicated to the COM15
where they can be transmitted to the master.
2/17
ANSI Device Number
Setting range
46
5 ... 50%
81THDC
5 ... 50%
47
5 ... 50%
27
100 ... 1100V
59
200 ... 1200V
81THDV
5 ... 50%
47N
-
32
13 ... 4000kW
32R
13 ... 4000kW
81U
40 ... 70 Hz
81O
40 ... 70 Hz
Setting range
30 ... 10000A
30 ... 10000A
30 ... 10000A
5 ... 50%
30 ... 10000A
5 ... 50%
15 ... 1200V
200 ... 1200V
5 ... 50%
5 ... 50%
1 ... 3,000
1 ... 3,000
13 ... 10000kW
13 ... 10000kW
0 ... -0.99
0 ... 0.99
-10000 ... 10000kW
13 ... 10000kVA
13 ... 10000kvar
13 ... 10000kvar
13 ... 10000kVA
13 ... 10000kvar
40 ... 70 Hz
40 ... 70 Hz
WL PROFIBUS Communication and Electronic Accessories • July 2004
Possible delay
0 ...15 s
5 ...15 s
0 ...15 s
0 ...15 s
0 ...15 s
5 ...15 s
-
0 ...15 s
0 ...15 s
0 ...15 s
0 ...15 s
Possible delay
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
5 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
5 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
0 ... 255 s
CubicleBUS
and can cause output contacts
Advertisement
