Hitachi Relion 650 Series Technical Manual page 96

Section 9
Control
Table 47:
Interface
CntrldOperType
ByPassMode
BLKOPOPR
BLKCLOPR
CONT
BLOCKALL
ContingencyMode
CloseStrategySrc
EXTSTGY
Table 48
for load types of capacitor, (coupled) reactor, transmission line, and power cable.
90
SSCPOW interfaces related to responding to switching commands
Type
Setting
Setting
Input
Input
Input
Input
Setting
Setting
Input
describes the overall effect of these signals and settings on opening and closing operations
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Description
Select the type of operations to be enabled (performed). It can be
selected as
• Open
• Close
• Open & Close
If "Open" option is selected, closing operations are blocked. Similarly,
if "Close" option is selected, opening operations are blocked.
The operation type(s) selected in this setting are permanently
bypassed if they are enabled in CntrldOperType setting. Options are:
• No Bypass
• Open
• Close
• Open & Close
Opening operations (if enabled by CntrldOperType setting) will be
blocked if this input is high (1).
Closing operations (if enabled by CntrldOperType setting) will be
blocked if this input is high (1).
If this input is high (1), operations enabled by CntrldOperType will be
blocked or bypassed as per the ContingencyMode setting.
If this input is high (1), all switching operations are blocked.
When conditions are not suitable for performing controlled switching,
as explained above, contingency mode is activated. All permitted
operations are either blocked or bypassed depending on the
selection in this setting. It can be set to:
• Block opening and block closing
• Bypass opening and bypass closing
• Block opening and bypass closing
• Bypass opening and block closing
Closing strategy to be adapted based on EXTSTGY status. The
following options are available:
• Internal
• External control (based on the status of EXTSTGY)
• External only (disregards EXTSTGY status)
• External / block (blocks the operation if EXTSTGY = 0)
• External / bypass (performs a bypassed operation if EXTSTGY
= 0)
Applicable for load types of (coupled) transformer.
Applies external switching targets when CloseStrategySrc =
"External control", "External / block", or "External/bypass".
Applicable for load types of (coupled) transformer.
1MRK 511 557-UEN Rev. A
Technical Manual