Reference Selection And Source Validation - Hitachi Relion 650 Series Technical Manual

Section 9
Control
Table 39:
Interface
INPRIOPL1
INPRIOPL2
INPRIOPL3
INPRICLL1
INPRICLL2
INPRICLL3
9.3.7.2

Reference Selection and Source Validation

To perform a controlled switching operation, the function requires a valid reference signal against
which the optimal point-on-wave control must be achieved.
The function block interfaces for receiving voltage and current signal related processed data, as
provided by the ANGSCAL function, are described in
Table 40:
Interface
U3P
I3P
VOLREFOK
CURREFOK
The reference signal for any controlled switching operation can be:
1. Source voltage for a controlled closing operation
2. Either source voltage or load current for a controlled opening operation
The reference for an open operation described above can be selected by setting OpenRef as shown
in Table
Table 41:
Interface
OpenRef
Any selected reference signal is validated to be healthy, that is, suitable as reference for controlled
switching before being used. If the reference signal cannot be used, reference missing condition is
declared, and switching is either bypassed or blocked according to the ContingencyMode setting
(see below). The function obtains status information of the healthiness of source at its inputs
VOLREFOK or CURREFOK from other functions (usually ANSGPROC) and uses this information for
its reference selection.
80
Nominal operating times of circuit breaker
Type
Input
Input
Input
Input
Input
Input
Reference voltage and current inputs
Type
Input
Input
Input
Input
41. The same information is updated at the output OPREF.
Selection of reference signal for controlled opening operations
Type
Setting
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Description
Nominal time from trip command to main contact separation
for phase L1.
Nominal time from trip command to main contact separation
for phase L2.
Nominal time from trip command to main contact separation
for phase L3.
Nominal time from close command to main contact touch for
phase L1.
Nominal time from close command to main contact touch for
phase L2.
Nominal time from close command to main contact touch for
phase L3.
Table 40.
Description
Information on zero crossings, half-cycle times, and
amplitudes in the three phases of the source voltage signals
Information on zero crossings, half-cycle times, and
amplitudes in the three phases of the load current signals
Indicates the healthiness of connected source voltage
Indicates the healthiness of connected load current
Description
Defines the reference signal for controlled opening operation.
There are two options for the setting:
• Voltage (meaning source voltage)
• Current (meaning load current)
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