Key Switch For Settings; Combiflex Modules - ABB Relion Series Product Manual

670/650 series and SAM600-IO IEC
2
xx1MRK000371-DA_1.vsd
IEC1MRK000371-DA-1 V1 EN-US
Figure 8. Example of a test switch module
Test switch
The test switch, RTXP 24, is used to make it possible to test
a IED in a failsafe way. Inserting a test-plug handle into the
test switch automatically makes all preparations for test in
the proper sequence. Blocked trip circuits, shortcircuited
CT's, opened voltage circuits makes the IED terminals
available for secondary injection test.
DC-switch
The DC-switch is optional in the test switch module and are
used to switch the DC-supply of the IED ON/OFF.
The DC-switch is of one seat Combiflex type and needs a
Combiflex terminal base to be mounted.

5. Key switch for settings

The key switch for lock-out of settings via the local human
machine interface is used to prevent unwanted changes of
settings. The switch locks the settings via a binary input.
The key switch is of one seat Combiflex type. To install it, a
case including a Combiflex terminal base is needed. One
possibility is to install the key switch in the same case as
the test switch.
Hitachi Power Grids
1
2
3
1
4
3
4
M1952-3 v1

6. Combiflex modules

Auxiliary relays
Auxiliary relays can be used together with the IED to
provide functionality such as lock-out, lock-out reset or
external contact re-enforcement
When the contact rating of the IED is insufficient, it is
recommended to use RXME 1 as a contact re-enforcement.
M1981-3 v1 IP633-1 v1
The RXME 1 is then activated from an IED contact which is
set up to be activated together with the IED contacts
M1983-3 v1
tripping the breaker. The contact of the RXME 1 is
connected in parallel, to take over the breaker trip coil
current. This gives an efficient solution and means no time
delay at tripping. See figure 9.
M1991-3 v2
M1993-3 v1
© 2017 - 2021 Hitachi Power Grids. All rights reserved.
Test switch
DC switch
Spare seat, can be used for Key switch
RHGS 6 case
1MRK 514 012-BEN K
SEMOD121105-4 v3
9