ABB Relion 670 Series Commissioning Manual page 221

1MRK 506 371-UUS E
• One part to verify the internal logic and timing of the auto recloser
• One part to verify its interaction with the protection system
This section deals with verification of the auto recloser itself. However, it is practical to initiate the
auto recloser by activating a protection function, for example, by secondary injection tests.
Prepare the IED for verification of settings outlined in Section
settings".
The purpose of verification before commissioning is to check that entered selections, setting and
configuration render the intended result. The auto recloser is flexible with many options and
facilities. At commissioning only the selections and settings intended for use are verified. If one
chooses to reduce some time settings in order to speed up verification, be careful to set the auto
recloser at intended operational values at the end of the verification procedure. One such
parameter is the
performed.
The verification test is performed together with protection and trip functions.
Figure 54
by an external bi-stable relay (BR), for example a relay type RXMVB2 or RXMD or Breaker Simulator
of ABB. The following manual switches are used:
• switch or push-button to close (SC)
• switch or push-button to trip (ST)
• switch for CB ready condition (SRY)
If no bi-stable relay or breaker simulator is available, replace it with two self-reset auxiliary relays
and use a self-holding connection.
Use a secondary injection IED test set to trip the protection function. The test set shall be
switched off when a trip signal is given or when the BR comes to open position to simulate real
conditions.
The CB simulation can be made more elaborate, including simulation of the operating gear
condition, CBREADY of either the type ready for a Close-Open (CO) cycle, or the type ready for an
Open-Close -Open (OCO) cycle.
The CB condition CBREADY of a type, CO, shall be high (true) until a closing operation is
performed. It then goes low (false) for a recharging time of about 5 - 10s. After that it is high
again.
A CB condition CBREADY of a type, OCO shall be high (true) before and during tripping (initiate
auto reclosing). During tripping it goes low for a recharging time, for example, 10s. It may thus be
low at the instant of reclosing. After each Open or Close operation it may need a recharging period
before it goes high again.
In the example of CB simulation arrangement, the CBREADY condition is simulated by a manual
switch, SRY.
Information and material for the verification:
• Protection or control unit, IED, configured and with settings entered.
• Configuration diagram for the IED
• Terminal diagram for the IED, or plant circuit diagram including the IED
• Technical reference manual for the IED
• IED test set for secondary injection
Line distance protection REL670
Commissioning manual
tReset time that must be timed out before a new test sequence can be
illustrates a suggested testing arrangement, where the circuit-breaker (CB) is simulated
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Testing functionality by secondary injection
"Preparing the IED to verify
Section 11
215