COMBIFLEX ® Mounting and Engineering System for Relay and Control Panels.
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COMBIFLEX®
Mounting and Engineering System forRelay and Control Panels.
2 ABB Automation
Build in the protection and security you need
The COMBIFLEX® mounting and engineering system
is a complete concept for engineering of relay and
control panels. Based upon this concept, complete
panels can easily be built.
COMBIFLEX® components can provide simple custom
logic circuits via auxiliary relays, timers and standard
functions.
Measuring relays e. g. for currents and voltage
provide simple and fast system solutions. In addition,
some of the special measuring relays available offer
characteristics not available with standard protection
terminals.
All our products, however, have the advantage of
being designed and developed specifically for integra-
tion with the COMBIFLEX® mounting and engineering
system. The COMBIFLEX® system offers several
advantages.
• Flexibility
Standard mechanical dimensions and connection
patterns. Availibility of all standard relay functions.
• Comfort
Connections are based on terminal pins and sockets
with ready made conductors.
• Simple transfer connection
Two conductors can be connected to virtually all
electrical points, making connection simplicity itself.
• Personal safety
All connection point are insulated for human
contact and all routine tests can be made while
system is in service and energized, and without
changing any connections.
COMBIFLEX® products
The revitalised range covers a wide spectrum of
products from measuring relays and time, auxiliary
and bistable relays to relay assemblies dimensioned to
meet forthcoming engineering requirements in power
systems and industrial applications. The full range of
new relays is presented on the pages 5-7 of this
brochure, and the range of available relays is shown
in the Byuer’s Guide catalogue.
Combitest relay test system
Even though modern microprocessor equipment has
built-in self-test and monitoring functions, it can be
necessary to use an injection test facility. This ensures
that all parts of the final assembly and overall system
work exactly as intended. The secondary injection test
facility can also be used to enable the relay system to
receive a simulated or recorded power system event
in “play-back” mode. This permits testing of cases
which may have caused confusion or concern in relay
operation or lack of operation. Numerical play-back is
further facilitated using test system simulation software.
A building system offering well-engineered
flexibility and high performance
3ABB Automation
be used stand alone in the form of measuring relays
for different applications, separate logic circuits as
well as comprehensive protective assemblies for a
variety of protection purposes. COMBIFLEX® is also
compatible with components used for testing,
connection and designation purposes.
A part of the ABB SA Concept
The COMBIFLEX® system is built for the future: new
technology provides new and additional functionality
and complements the other microprocessor protective
relay and control equipment families, for example the
500-series. The COMBIFLEX® system is an integrated
part of the overall ABB SA concept for integrated IT-
solutions for the power industry. The reliability of the
COMBIFLEX® system is documented through 25 years
of use in many different environments, including
nuclear power applications.
COMBIFLEX® environment
The 500-series represents terminals for line distance,
differential, transformer protection as well as bay
lever control. These protection terminals are often
integrated with separate relays for backup measurement,
trip functions or contact replication. The terminals
combine easily with COMBIFLEX® auxiliary equipment
such as test switches, auxiliary tripping relays, lock-out
relays and other units in the design of complete
protection and control cubicles.
The COMBIFLEX® range covers products which may
Mounting and Engineering System with
overall coordination and integration
With the introduction of the 500-series protection, monitoring
and control equipment, each protection system offers a wide
range of internal flexibility. By utilising various combinations of
additional COMBIFLEX® modular options the same basic
product can be used in a wide variety of applications, mounted
in 19" racks, panels or walls.
The RAHx/RXHx 4xx-series of numerical products are
intended for general power system applications and as
back-up to 500-series terminals for all system voltage
levels including EHV. The relays are also suitable for
retrofit of installations using static or electromechanical
designs. Several mounting alternatives are available;
19" racks, panel mounting cases and DIN-rail adapters.
Ease of handling is an added benefit as well as the
easy integration with all other relays and test switches
of COMBIFLEX® design.
New Compact Line Protection and Breaker Failure Relays
4 ABB Automation
Connection system
The COMBIFLEX® connection system has been used over many decades and
has shown itself as a very reliable system, combining flexibility with installation
convenience. It is used for wiring panels and rack-mounting assemblies which
require dual snap-in terminals for each electrical point. Moreover, the terminals
are insulated from human contact, enhancing personnel safety. Safety is further
improved by the fact that all the terminals are locked in place. This connection system
lends itself to CAD-design as a tool when creating new relay and control systems.
Designation system
The COMBIFLEX® designation system is part of the invisible mounting
and engineering system which nobody sees in everyday work but
which would be immediately noticeable if it was missing. The
designation system is the backbone of the process as it covers the
entire chain from marking of relays and other components on the
drawings to defining their connection points in circuit diagrams and
connection tables. This system facilitates computer aided design.
Mounting system
The COMBIFLEX® mounting system for relay equipment has been shaped over
decades of practical experience from assembly of complete relay and control systems.
The system is based on the 19" rack standard which permits simple combination
of products using the same international standard. It offers various ways of building
up the relay and control panels. All the minor details of COMBIFLEX® integrate
perfectly and form well-functioning panel designs.
Easy to mount, easy to connect and easy to identify
Mounting system strong on flexibility…
Designation system: Not seeing is believing…
Connection system built for safety…
RHGP 1, 2, 2H and 4 mounted in 19" panel
RHGP 4B, 1 och 8 mounted in 19" panel
New Panel Maounting Cases RGHP
The new RGHP panel mounting cases enables affordable cut out mounting of
indiviual COMBIFLEX modules in panels. Test switches, powersupplies, auxilary
relays and measuring relays of all types may thus be flush panel mounted. Any
relay type of COMBIFLEX® design can thus be mounted and used in existing
panels. Mounting in typical switch-board panel cut-outs is more affordable with
the new RHGP panel mounting cases.
New Retrofit Case for 900-series
A version of the size new case RHGP 4B is intended for mounting in the same cut out
space as the earlier 900-series relays made by ABB in Switzerland, e.g. the current
relays type IKC 9xx, IKT9xx, the voltage relays type UKT9xx and the Rxx9xx-series
etc. This is introduced to facilitate retrofit and extensions of earlier installations.
RXHL401
RXHL411
RXHL421
RXHL422
RXIDK2H
RXIDG2H
RXIIK4
RXISK2H
RXEDA1
RXEDK2H
RXFK2H
RXLK3H
RXVK3H
RXZK21
RXZK22
RXZK23
RXPDK21
RXPDK22
RXPDK23
RXPPK2H
RXETB1
RXBA4
RXPG4
RXMA182
RXMB/C182
RXMD182
RXME1818
RXMH2
RXMS1
RXMVB284
RXSF1
RXKA1
RXKL1
RXKM2H
RXTUG22H
RXTUB2
RTXP8, 18, 24
REB010
RAICA
RXHB411
Rela
y ty
pes
Gen
eral
Pro
tect
ion
Ap
plic
atio
nsS
hort
circ
uit
prot
ectio
nO
verc
urre
nt (N
umbe
r of
pha
se e
lem
ents
)H
arm
onic
cur
rent
filte
rs a
nd m
easu
rem
ents
Dire
ctio
nal o
verc
urre
nt (N
umbe
r of
pha
se e
lem
ents
)Im
peda
nce/
dist
ance
(Num
ber
of p
hase
ele
men
ts)
Und
ervo
ltage
Vol
tage
res
trai
ned
over
curr
ent
Ear
th fa
ult
prot
ectio
nC
urre
ntD
irect
iona
l cur
rent
Vol
tage
(with
or
with
out
3rd
harm
onic
filte
r)Th
ird h
arm
onic
vol
tage
mea
sure
men
tTr
ansi
ent
mea
sure
men
tO
verv
olta
geU
nder
volta
geH
arm
onic
vol
tage
mea
sure
men
tsS
ymm
etric
al c
ompo
nent
sN
egat
ive
sequ
ence
cur
rent
Freq
uenc
y ba
sed
prot
ectio
nFr
eque
ncy
base
d lo
ad s
hedd
ing
Rat
e of
cha
nge
of fr
eque
ncy
V/H
zTh
erm
al o
verlo
adB
reak
er fa
ilure
rel
ayTh
ree-
phas
e tr
ippi
ngS
ingl
e-ph
ase
trip
ping
Dua
l tim
er s
chem
esR
eclo
sing
rel
ayO
ut o
f ste
p tr
ippi
ngP
ole
disa
gree
men
t -
curr
ent
base
dA
uxili
ary
rela
ysG
ener
al p
urpo
se a
nd s
igna
lling
Gen
eral
pur
pose
and
sig
nallin
g w
ith lo
cal f
lags
or
LED
SC
AD
A r
emot
e si
gnal
ling
and
tran
sfer
trip
Hea
vy d
uty
Hea
vy d
uty
with
flag
sTr
ippi
ng r
elay
sH
igh
spee
d he
avy
duty
trip
ping
rel
ay a
ssem
bly
Bis
tabl
e he
avy
duty
han
d an
d el
ectr
ic r
eset
rel
ays
Bis
tabl
e m
ediu
m d
uty
hand
and
ele
ctric
res
et r
elay
s
Tim
ers
Gen
eral
pur
pose
pic
k up
, dro
p ou
t, pu
lsed
out
put
dela
yG
ener
al p
urpo
se p
ick
up, p
ulse
d ou
tput
del
ay
Gen
eral
pur
pose
pic
k up
, dro
p ou
t, pu
lsed
out
put
dela
y
Co
nver
ters
D
C/D
C 1
5W d
ual o
utpu
t co
nver
ter
for
24-2
50V
sta
tion
batt
ery
AC
/DC
Pow
er s
uppl
y
Tes
t S
wit
ches
A
utom
atic
CT
shor
ting
and
trip
circ
uit
isol
atio
n du
ring
in s
ervi
ce t
estin
g 8/
18/2
4 co
ntac
ts
CO
MB
IFLE
X®
Pro
duct
Tab
le
33
2 2
1 1 alt
1
11
1
Func
tio
ns3
Thre
e ph
ase
2Tw
o ph
ase
1S
ingl
e ph
ase
Pos
sibl
e ap
plic
atio
nO
ptio
nal a
pplic
atio
n
6 ABB Automation
Protection types
Generator Motor protectionDifferential
Percentage restraintHigh impedanceOvercurrent based low impedance differential
Stator earthfault High Impedance differentialPercentage restraint differentialOvercurrent based differentialVoltageCurrent100% stator E/F detection based on 3rd harmonic
Overexcitation V/HzUnderexcitation I cos phiOvercurrent Inverse or definite time delayVoltage restrained overcurrent Inverse or definite time delayNegative sequence current Inverse or definite time delay and memoryThermal overload Inverse or definite time delay and memoryReverse power or low forward powerImpedance/DistanceFrequency Steps and rate of changeRotor earth fault
Voltage balanced bridge schemeAC current injection detectionAC current injection active fault component detectionDC resistance measurement
Rotating exciter diode failure Shorted and opened diode
Transformer, reactor and capacitor bank protectionDifferential
High Impedance differentialPercentage restraint differentialOvercurrent based differential
Restricted earth-faultHigh Impedance differentialPercentage restraint differentialOvercurrent based differentialHarmonic (inrush) restrained overcurrent
Earthfault VoltageCurrentHarmonic (inrush) restrained overcurrent
Overexcitation V/HzOvercurrent Instantaneous and time delayedThermal overloadImpedance/DistanceVoltage regulating relay
LineDifferential
High Impedance differentialPercentage restraint differentialOvercurrent based differential
OvercurrentDirectional overcurrentEarth faultDirectional earth faultThermal overloadVoltage restraint overcurrentImpedance/DistancePower swing detectionOut of step trippingAutoredusingSyndrocheck
Bus and BreakerDifferential
High ImpedancePercentage restraint < 6 Breakers
> 6 BreakersOvercurrent blocking scheme
Breaker FailurePole disagreement current based
COMBIFLEX® Product Table
Functions 3 Three phase 2 Two phase 1 Single phase Possible application Optional application
7ABB Automation
RA
ED
A
RA
ED
K
RA
IDK
RA
IDG
RA
IIK
RA
VK
RA
ISK
RA
FK
RA
ZK
RA
LK
RA
PD
K
RA
PP
K
RA
HL401
RA
HL411
RA
HL421
RA
HL422
RA
HB
411
RA
GC
X
RA
GE
K
RA
GP
K
RA
DS
B
RA
DS
C/R
AD
SQ
RA
DH
A/R
AD
HD
RA
DH
L
RA
DS
L
RA
DS
S
RA
CIK
RA
SC
/RA
SD
RA
YA
RA
ISB
RX
NB
1
1
1
1
1
1
1
1
ABB Automation Products ABSubstation Automation DivisionSE-721 59 Västerås, Sweden
Phone +46 21 34 20 00Fax +46 21 14 69 18www.abb.com/substationautomation
WYBO
1MR
K 5
00 0
50-S
EN
We can offer a comprehensive range of integrated solutions for the efficient and reliable management
of power networks. Using innovative information technology, our solutions offers protection monitoring
and control for the entire power process from generation to distribution.
To serve you with engineering assistance we offer you on-line access to the latest documentation.
Buyer’s Guides
• You can easily search for Buyer’s Guides by Application, Product Type, or by Document Number.
All documents are available for download in pdf-format.
Circuit and Terminal Diagrams
• This service provides access to circuit and terminal diagrams of our promoted and maintained
product ranges of protection relays.
• You can download and import the latest diagrams to your CAD system, thereby reducing
engineering time substantially, and minimizing errors in the drawing process.
• The diagrams are provided in three formats in order to suit as many CAD
systems as possible.
The above services can be found at our website:
www.abb.com/substationautomation
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