Siemens UL1066, UL 489 specifications 81THDC

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	ANSI Device Number	Setting range		Possible delay
Current unbalance	46	5 ...	50%	0 ...	15 s
Total harmonic distortion - current	81THDC	5 ...	50%	5 ...	15 s
Voltage unbalance	47	5 ...	50%	0 ...	15 s
Undervoltage	27	100	... 1100V	0 ...	15 s
Overvoltage	59	200	... 1200V	0 ...	15 s
Total harmonic distortion - voltage	81THDV	5 ...	50%	5 ...	15 s
Direction of phase rotation	47N	-		-
Active power in normal direction	32	13 ...	4000kW	0 ...	15 s
Active power in reverse direction	32R	13 ...	4000kW	0 ...	15 s
Under frequency	81U	40 ...	70 Hz	0 ...	15 s
Over frequency	81O	40 ...	70 Hz	0 ...	15 s

Table 2-8Additional 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	Setting range		Possible delay
Over current	30 ...	10000A	0 ...	255 s
Over current - ground fault	30 ...	10000A	0 ...	255 s
Over current - N-conductor	30 ...	10000A	0 ...	255 s
Phase unbalance - current	5 ...	50%	0 ...	255 s
Demand - current	30 ...	10000A	0 ...	255 s
Total harmonic distortion - current	5 ...	50%	5 ...	255 s
Undervoltage	15 ...	1200V	0 ...	255 s
Overvoltage	200	... 1200V	0 ...	255 s
Phase unbalance - voltage	5 ...	50%	0 ...	255 s
Total harmonic distortion - voltage	5 ...	50%	5 ...	255 s
Crest factor	1 ...	3,000	0 ...	255 s
Form factor	1 ...	3,000	0 ...	255 s
Active power in normal direction	13 ...	10000kW	0 ...	255 s
Active power in reverse direction	13 ...	10000kW	0 ...	255 s
Leading power factor	0 ...	-0.99	0 ...	255 s
Lagging power factor	0 ...	0.99	0 ...	255 s
Demand - active power	-10000 10000kW...		0 ...	255 s
Apparent power	13 ...	10000kVA	0 ...	255 s
Reactive power in normal direction	13 ...	10000kvar	0 ...	255 s
Reactive power in reverse direction	13 ...	10000kvar	0 ...	255 s
Demand - apparent power	13 ...	10000kVA	0 ...	255 s
Demand - reactive power	13 ...	10000kvar	0 ...	255 s
Underfrequency	40 ...	70 Hz	0 ...	255 s
Overfrequency	40 ...	70 Hz	0 ...	255 s

Table 2-9Alarm 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 CubicleBUS and can cause output contacts to close in the configurable output module and can freeze the waveform buffer in the metering function. Alarms are communicated to the COM16/15 where they can be transmitted to the master.

2/17

WL MODBUS Communication and Electronic Accessories • January 2005