Elster A1120, Руководство пользователя

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34
A1120/40 - Electronic Polyphase Meter
©
Elster Metering Limited - M181 001 2G - 5/2010
21.2 Test Indication (Manufacturing option)
The output can be configured at manufacture to generate pulses that replicate the kWh LED or
the kvarh LED.
This option is desirable if meter accuracy verification must be performed without using optical
pickups. When configured in this way the auxiliary output pulse width and LED pulse width are
the same (approximately 6 ms).
22 ADDITIONAL VOLTAGE TERMINALS
As an option the A1120/40 can be supplied with additional terminals that allow external
equipment to be powered from the meter (See Figure 5).
WARNING
Connections made to these terminals will only be protected by the installation’s main fuse cut-
out.
The installer must ensure that additional local protection is provided for any circuits connected
to these terminals.
23 LOAD PROFILE RECORDING (A1140)
4 Demand Values
(kW, kvar, kVA,
Customer Defined)
Demand Period End
Typical Load Profile Recording
Readings
Readings
Power
Master Unit
Proprietary
Software
Channels Days
1 300
2 300
3 265
4 205
(30 minute integration period)
The A1140 can be programmed to record up to four values from any of the rising demand registers
at the end of each integration period. Up to 300 days of 30 minute data can be stored for a single
channel. The number of day's storage is reduced if Instrumentation Profiling is configured, the
Number of Channels stored is increased or the Integration Period is reduced.
Integration period - 1, 2, 3, 4, 5, 6, 10, 15, 20, 30, 60 minutes. Common with the demand period.
Load profile data is stored with reference to either base time or daylight saving time.
•
Base Time - Daylight savings have no effect on the demand period and 48 periods are stored
(assuming 30 minute integration period).
•
Daylight savings time - When the clock advances, 46 periods will be stored. When the clock
retards, 50 periods will be stored (assuming 30 minute integration period).