ABB Relion 670 Series REL670 Commissioning Manual page 210

Section 10
Testing functionality by secondary injection
204
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 44 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
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
• Means to indicate, measure and record operation and times, for example an event
recording facility
1MRK 506 355-UEN A
Line distance protection REL670 2.1 IEC
Commissioning manual