Autorecloser For 1/2/3-Phase Operation Smbrrec - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.9.2
150

Autorecloser for 1/2/3-phase operation SMBRREC

Verification of the Autorecloser for 1/2/3-phase operation function SMBRREC for
single-phase, two-phase or three-phase reclosing attempts can be considered to
consist of two parts.
• One part to verify the internal logic and timing of the function
• One part to verify its interaction with the protection system
This section deals with verification of SMBRREC itself. However, it is practical to
start SMBRREC by activating a protection function, for example, by secondary
injection tests.
Prepare the IED for verification of settings outlined in section
verify settings".
The purpose of verification before commissioning is to check that entered selections,
setting parameters and configuration render the intended result. The function 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 parameters at intended operational
values at the end of the verification procedure. One such parameter is the tReclaim
time that must be timed out before a new test sequence can be performed.
The verification test is performed together with protection and trip functions.
Figure 25 illustrates a suggested testing arrangement, where the circuit-breaker (CB)
is simulated 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 operate 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 (Start reclosing). During tripping it goes low for a recharging time, for
1MRK 511 360-UEN A
"Preparing the IED to
Bay control REC670 2.1 IEC
Commissioning manual