Siemens SIPROTEC 7SJ62 Instruction Manual page 132
Multi-functional protective relay with bay controller
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Also See for SIPROTEC 7SJ62:
- Manual (704 pages) ,
- Technical data manual (58 pages) ,
- Manual (72 pages)
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Configuration
Example 2:
Isolation Switch
Interlocking
5-38
• A lower limit setpoint value (IL<) is linked with the setpoint inputs of each of three
limit sensor functions.
• The limit value function outputs are passed on to the OR gate.
• The output of the OR gate is connected to the right border column at annunciation
"² DODUP".
The limit value message is triggered when the preset limit value is below the setpoint
(low current) in at least one of the three phases. The hysteresis of the limit values is
fixed and need not be entered (5 % of set point plus 0.5 % absolute).
Measurement
Ia
Set points
37-1
Measurement
Ib
Set points
37-1
Measurement
Ic
Set points
37-1
Figure 5-39
Under-Current Monitoring as an Example of User Defined Measurement Value
Processing
Interlocking logic (see Figure 5-40) is to be implemented for the operation of an isolat-
ing switch using function key 4. The user must take the switch position indications of
the corresponding isolation switch and the grounding switch into account. The CLOSE
and TRIP indications from the auxiliary contacts of each switch are used.
• Function modules NOR (2 required), XOR, and AND are taken from the library and
copied into the working page.
• The inputs of the AND gate are increased to 7.
• The CLOSE indications from the circuit breaker (CB) and from the grounding switch
(GS) are supplied to the inputs of the NOR functions.
• The OPEN indications from the circuit breaker (CB) and from the grounding switch
(GS) are supplied to the inputs of the AND function.
• The switch position indications from the disconnect switch (IS) are linked to the in-
puts of the XOR function.
• The outputs of the NOR and XOR gates are connected to the inputs of the AND
function.
• Function key 4 is linked with an input of the AND function.
• The output of the AND gate is linked to the right border column at the command
"Disconnector Close".
FM:
Lower
Setpoint
FM:
FM:
Lower
or
Setpoint
FM:
Lower
Setpoint
37-1
alarm OUT
7SJ62 Manual
C53000-G1140-C121-1
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