ABB RXHL 401 User manual

Page 1
RXHL 401 and
RAHL 401
Compact current relay and
protection assemblies
1MRK 509 062-BEN
Issued: February 2000
Status: New
Data subject to change without notice
Features Three phase compact current relay for:
•Phase overcurrent protection, three
stages
•Earth-fault overcurrent protection, three
stages
• Phase and earth fault overcurrent protec-
tion functions with
- Three stages, the first stage has select-
able time delay; definite or inverse. The
second and the third stage have definite
time delay
- Logic for detection and clearance of
intermittent faults
• General characteristics for the relay
- There are two groups of parameters set-
table and readable through the HMI
- The dialog with the relay can be made in
English or Swedish
- There are two binary inputs for blocking
or enabling of selected functions. The
binary inputs can also be used for
change of setting groups
- There are five binary output relays,
which can be independently configured
for the different protection functions
- Service values (primary/secondary) and
disturbance information can be pre-
sented through the HMI
- Start, trip can be presented through the
HMI
- The relay has self-supervision with out-
put error signal
- Testing of the output relays and opera-
tion of the binary inputs can be per-
formed through the HMI
General Compact current
relay RXHL 401
The compact current relay RXHL 401 has a
wide application range from main to back-up
protection for feeders and lines, transformers,
capacitor banks, electric boilers as well as for
generators and motors.

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 2
Functions Overcurrent
protection
Application
In radially fed power networks the phase
overcurrent function can be used as main or
back-up short circuit protection for lines and
transformers. The time current characteristic
(definite time or any of the inverse time char-
acteristics) should be chosen according to
common practice in the network. Normally
the same time current characteristic i used for
all phase overcurrent relays in the network.
This includes phase overcurrent protection
for lines, transformers and other equipment.
The measuring relay offers great flexibility in
the choice of time characteristic.
There is a possibility to use phase overcurrent
protection in meshed systems as short circuit
protection for lines. It must however be rea-
lised that the setting of a short circuit protec-
tion system in meshed networks, can be very
complicated and a large number of fault cur-
rent calculations are required. There are situa-
tions where there is no possibility to achieve
selectivity with a protection system based on
phase overcurrent relays in a meshed system.
In combination with impedance relays or line
differential protections, phase overcurrent
relays can serve as back-up short circuit pro-
tection for parts of the lines.
For shunt capacitors, shunt reactors, motors
and other similar equipment phase overcur-
rent protection can serve as main or back-up
short circuit protection. Also for these appli-
cations the time characteristics should be cho-
sen so that co-ordination with other
overcurrent protection in the power system
can be made.
As the short circuit current level will change
depending on the switching state in the power
system, there is a great benefit to be able to
change parameter-setting groups when the
switching state in the system is changed. The
measuring relay will enable this.
The blocking option can be used to decrease
fault time for some fault points (for example
busbars) in radially fed networks.
Design
The overcurrent protection has a low set stage
with inverse or definite time delayed func-
tion. The inverse time characteristics are pro-
vided with minimum operate time for
improved selectivity in certain applications.
The low set stage also has a reset time logic
for detection of intermittent faults. If the pro-
tection starts and the fault current drops the
reset of the function will be made gradually
so that the integrated fault current time area
will be remembered for some time. In case of
an intermittent fault every re-strike of the
fault will increase the integrated current-time
area so that the fault can be tripped.
The overcurrent protection has two high set
stages with definite time delayed function.
The overcurrent protection is designed for
low transient overreach which allows
extended reach and smaller setting margins.
The following characteristics are selectable
for the low set stage (diagrams are shown in
the chapter “Design description”):
1 Definite time delayed
2 Inverse time delayed:
- Normal inverse (NI)
- Very inverse (VI)
- Extremely inverse (EI)
- Long time inverse (LI)
- RI inverse (RI)
NI, VI, EI and LI according to IEC 60255-3.
RI-curve according to old electromechanical
relays manufactured by ASEA.
Earth-fault protection
Application
The earth-fault protection is non-directional
and based on a measurement of the residual
current. It is mainly used in solidly and low
impedance grounded networks. In high
impedance grounded networks, the size of the
network and nationalstandards are the factors
determining whether the protection can be
used. The high set stages are used in the simi-
lar way as they are in the phase overcurrent
protection, but only in solidly and low imped-
ance grounded networks.
In solidly grounded networks the earth-fault
currents can be of the same order of magni-
tude as the short-circuit currents.
Earth-faults with high fault resistance can be
detected by measuring the residual current.
This type of protection provides maximum
sensitivity to high resistive earth-faults. It is

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 3
often required to clear the earth-faults with
residual currents of magnitudes which are as
low as 50-100A.
In high-impedance grounded networks a sen-
sitive non-directional earth-fault overcurrent
function can be used as a protection for cross-
country faults. This is due to the fact that
there is a risk that cross-country faults will
not activate directional earth-fault overcur-
rent relays.
In some systems a medium impedance resis-
tive system grounding is used. The neutral
point resistor will give an earth-fault current,
larger than the capacitive earth-fault current
of the lines and cables in the system. If the
system is operated radially the non-direc-
tional earth-fault overcurrent protection can
be used as earth-fault line protection.
In many applications a directional function of
the residual overcurrent protection is desir-
able. In such cases the measuring relay can be
used in combination with the directional relay
RXPDK 23H, that will provide enable criteria
in case of earth-faults in the forward direc-
tion.
Both inverse time characteristics protection
as well as three step definite time characteris-
tics are used. If inverse time characteristics
are used with equal currents and time settings
for all residual current protections in the sys-
tem. Selectivity is usually achieved as long as
there are more than two bays carrying fault
current to each substation.
It is also possible to use the protection as a
multi-stage earth-fault current line protection
where the first stage has instantaneous func-
tion and covers most of the protected line.
The second stage has a short delay (about 0.4
s) and covers the rest of the line. The third
stage has a longer delay and will give rela-
tively rapid and selective fault clearance of
high resistive phase to earth-faults.
Design
The earth-fault protection has a low set stage
with inverse or definite time delayed func-
tion. The inverse time characteristics are pro-
vided with minimum operate time for
improved selectivity in certain applications.
The low set stage also has a reset time logic
for detection of intermittent faults. If the pro-
tection starts and the fault current drops the
reset of the function will be made gradually
so that the integrated fault current time area
will be remembered for some time. In case of
an intermittent fault every re-strike of the
fault will increase the integrated current-time
area so that the fault can be tripped. The
earth-fault protection has two high set stages
with definite time delayed function. The
earth-fault protection is designed for low
transient-overreach which allows extended
reach and smaller setting margins.
The following characteristics are selectable
for the low set stage (diagrams are shown in
the chapter “Design description”):
1 Definite time delayed
2 Inverse time delayed:
- Normal inverse (NI)
- Very inverse (VI)
- Extremely inverse (EI)
- Long time inverse (LI)
- RI inverse (RI)
- Logarithmic inverse (LOG)
NI, VI, EI and LI according to IEC 60255-3.
RI-curve according to old electromechanical
relays manufactured by ASEA.
LOG-curve according to RXIDG relay manu-
factured by ABB.

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 4
Miscellaneous Active setting group
Application
Different settings of protection functions
enable convenient change of network opera-
tional conditions, for example switching
between normal and emergency situations.
The user can change the active setting group
at any time, locally by means of local HMI or
by activation of the corresponding binary
input to the “ChActGrp” function.
Design
The relay has basically two sets of indepen-
dent setting groups built-in, which contain all
setting parameters for overcurrent and earth-
fault protections. The function has a binary
input signal that enables the user to change
active group and also a binary output signal
for indication of which setting group is
active.
Self-supervision
Application
The self-supervision function includes the
following functions;
• Checksum verification of ROM contents
during start-up.
• RAM verification during start-up.
• Normal micro-processor watchdog func-
tion, continuously.
• Internal communication error handler,
continuously.
An output error signal from the function is
available to configure to a binary output.
Local HMI
Application
The local HMI (Human-Machine-Interface)
serves as an information unit, presenting ser-
vice values and information from the last two
recorded disturbances. The current status of
all binary input signals are also available.
Trip value recording
Application
At power system faults the relay records the
primary trip values and they can be presented
in the local HMI.
The recorded values are always from the last
disturbance.

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 5
Design
description Compact current relay RXHL 401
The compact current relay RXHL 401 consti-
tutes the measuring relay of RAHL 401.
The compact current relay RXHL 401 is a
protective class II equipment in which protec-
tion against electric shock does not rely on
basic insulation only, but in which additional
safety precaution such as double insulation or
reinforced insulation are provided.
RXHL 401 is a three-phase static, micropro-
cessor-based relay with four input current
transformers for galvanic insulation. The
input signals are connected to D/A-converters
and then filtered. The signals are sampled in
the A/D-converter and read into the micro-
processor. The unfiltered input signals are
also connected to zero crossing detectors and
read into the microprocessor. All settings of
the relay will be done in the local HMI.
The relay is provided with three LED’s; one
for start, one for trip and one for “in service”.
The relay is provided with two binary inputs
and five binary outputs, the binary inputs are
galvanically separated from the electronics
with opto-couplers. The binary outputs con-
sist of electromechanical relays, each with
one change over contact. RXHL 401 requires
a DC/DC-converter for the auxiliary voltage
supply +/-24 V; RXTUG 22H is recom-
mended. The relay is delivered with 4-short-
circuiting connectors RTXK for mounting on
the rear of the terminal base. The connectors
will automatically short-circuit the input cur-
rents when the relay is removed from the ter-
minal base.
Terminal diagram
Figure 1: RXHL 401
111
112
113
BinaryInput1
121
122
123
BinaryInput2
BinaryOutput1
BinaryOutput2
BinaryOutput3
BinaryOutput4
BinaryOutput5
127126
128
324323
325
327326
328
414413
415
417416
418
IL1
131
141
231
241
IL2
331
341
IL3
431
441
I
N
Auxiliary supply ±24V
115 116 114
0-+
117
0 V
48 - 60 V
110 - 220 V
RL
0 V
48 - 60 V
110 - 220 V
RL
Current inputs
99000444.vsd

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 6
Time characteristics
Figure 2: Normal inverse time characteristic Figure 3: Very inverse characteristic
12345710 20
I/I>
k=
1,1
0,05
0,1
0,3
0,5
0,7
0,9
20
10
1
0,1
S
99000244.vsd
99000245.vsd
12345710 20
I/I>
k=
1,1
0,05
0,1
0,3
0,5
0,7
0,9
S
20
10
1
0,1
0,05

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 7
Figure 4: Extremely inverse time characteristic Figure 5: Long-time inverse characteristic
99000980.vsd
12345710 20
I/I>
k=
1,1
0,05
0,1
0,3
0,5
0,7
0,9
100
10
1
0,01
S
0,1
99000248.vsd
12345710 20
I/I>
k=
1,1
0,05
0,1
0,3
0,5
0,7
0,9
100
10
1
0,1
S
200

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 8
Figure 6: RI inverse time characteristic Figure 7: Logarithmic inverse time (IDG) characteristic
99000247.vsd
12345710 20
I/I>
k=
1,1
0,05
0,1
0,3
0,5
0,7
0,9
20
10
1
0,1
S
0,5 2135
10 40 I/I>
20
47
6
5
2
1
S
4
3
MinT=
2,0
1,0
k= 1,0 4,0
99000983.vsd
I
N
/I
N>

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 9
Frequency characteristic
Figure 8: Frequency characteristic
20 30 40 50 60 70 100 150 200 300 400 Hz
x set operate value
7
6
5
4
3
2
1
10
99001111.vsd

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 10
Technical data Table 1: Current inputs
Rated phase current Ir1 A or 5 A
Rated neutral current INrFor Ir= 1 A 0.1 A or 1 A
For Ir= 5 A 0.1 A, 1 A or 5 A
Setting range for the over-
current protection Stage I> Ir= 1 A 0.2-3.0 A
Ir= 5 A 1-15 A
Stage I>> (1.0-20) x set operate value I>
Stage I>>> (1.0-20) x set operate value I>
Setting range for the earth
fault protection Stage IN>IN
r
= 0.1 A 10-250 mA
INr= 1 A 0.1-2.5 A
INr= 5 A 0.5-12.5 A
Stage IN>> (1.0-20) x set operate value IN>
Stage IN>>> (1.0-20) x set operate value IN>
Effective phase current range (0.04-60) x Ir
Effective earth current range (0.05-50) x INr
Rated frequency Fr50 and 60 Hz
Frequency range 40-60 Hz/50-70 Hz
Power consumption, per
phase at rated current Ir= 1 A < 30 mVA
Ir = 5 A < 150 mVA
Power consumption, at
rated neutral current INr= 0.1 A < 15 mVA
INr = 1 A < 30 mVA
INr= 5 A < 150 mVA
Overload capacity for
phase current input Ir= 1 A continuously 4 A
Ir= 5 A continuously 20 A
Ir= 1 A during 1 s 100 A
Ir= 5 A during 1 s 350 A
Overload capacity for neu-
tral current input INr= 0.1 A continuously 0.4 A
INr = 1 A continuously 4 A
INr = 5 A continuously 20 A
INr = 0.1 A during 1 s 10 A
INr = 1 A during 1 s 100 A
INr = 5 A during 1 s 350 A

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 11
Table 2: Binary inputs
Table 3: Output relays
Table 4: Auxiliary DC voltage supply
Table 5: Electromagnetic compatibility (EMC), immunity test
Inputs Rated values
Binary inputs 2
Binary input voltage RL 48-60 V DC and 110-220 V DC, -20% to +10%
Power consumption 48-60 V DC < 0.3 W / input
110-220 V DC < 1.0 W / input
Outputs Rated values
Contacts 5 change-over
Maximum system voltage 250 V AC/DC
Current carrying capacity Continuous 5 A
During 1 s 15 A
Making capacity at inductive
load with L/R >10 ms During 200 ms 30 A
During 1 s 10 A
Breaking
capacity AC, cos ϕ> 0.4 max. 250 V 8 A
DC, L/R < 40 ms 48 V 1 A
110 V 0.4 A
220 V 0.2 A
250 V 0.15 A
Power consumption Rated values
Auxiliary voltage EL for RXTUG 22H 24-250 V DC, +/-20%
Auxiliary voltage for the relay +/-24 V (from RXTUG 22H)
Power consumption
with back-light on With RXTUG 22H, input 24-250 V Before operation < 5.0 W
After operation < 7.0 W
Without RXTUG
22H, +/-24 V Before operation < 2.7 W
After operation < 4.3 W
Power consumption, back-light. Approximately 0.5 W
All tests are performed together with the DC/DC-converter, RXTUG 22H
Test Severity Standard
Surge 1 and 2 kV IEC 61000-4-5, class 3
AC injection 500 V AC SS 436 15 03, PL 4
Power frequency magnetic field 1000 A/m IEC 61000-4-8

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 12
Table 6: Electromagnetic compatibility (EMC), emission tests
Table 7: CE-demand
Table 8: Insulation tests
1 MHz burst 2.5 kV IEC 60255-22-1, class 3
Spark 4-8 kV SS 436 15 03, PL 4
Fast transient 4 kV IEC 60255-22-4, class 4
Electrostatic discharge at normal service
with cover on 6 kV (contact) IEC 60255-22-2, class 3
8 kV (air) IEC 60255-22-2, class 3
6 kV, indirect applica-
tion IEC 61000-4-2, class 3
Radiated electromagnetic field 10 V/m, 80-1000 MHz IEC 61000-4-3, Level 3
Radiated pulse electromagnetic field 10 V/m, 900 MHz ENV 50204
Conducted electromagnetic 10 V, 0.15-80 MHz IEC 61000-4-6, Level 3
Interruptions in auxiliary voltage 2-200 ms IEC 60255-11
No reset for inter-
ruptions 24 V DC < 20 ms
110 V DC < 70 ms
250 V DC < 300 ms
All tests are performed together with the DC/DC-converter, RXTUG 22H
Test Severity Standard
Conducted 0.15-30 MHz, class A EN 50081-2
Radiated 30-1000 MHz, class A EN 50081-2
Test Reference standard
Immunity EN 50082-2
Emission EN 50081-2
Low voltage directive EN 50178
Test Severity Standard
Dielectric Current circuit to circuit
and current circuit to earth 2.5 kV AC, 1 min IEC 60255-5
Circuit to circuit and circuit
to earth 2.0 kV AC, 1 min
Over open contact 1.0 kV AC, 1 min
Impulse voltage 5 kV, 1.2/50 µs, 0.5 J IEC 60255-5
Insulation resistance > 100 MΩat 500 V DC IEC 60255-5
All tests are performed together with the DC/DC-converter, RXTUG 22H
Test Severity Standard

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 13
Table 9: Mechanical test
Table 10: Climatic conditions
Table 11: Weight and dimensions
Table 12: Service values
Test Severity Standard
Vibration Response: 1 g, 1-150-10 Hz IEC 60255-21-1, class 2
Endurance: 1 g, 10-150-10 Hz, 20 sweeps IEC 60255-21-1, class 1
Shock Response: 5 g, 11 ms, 3 pulses IEC 60255-21-2, class 1
Withstand: 15 g, 11 ms, 3 pulses
Bump Withstand: 10 g, 16 ms, 1000 pulses IEC 60255-21-2, class 1
Seismic X-axis: 3 g, 1-50-1 Hz IEC 60255-21-3, class 2,
extended (Method A)
Y-axis: 3 g, 1-50-1 Hz
Z-axis: 2 g, 1-50-1 Hz
Climatic condition Partially weather protected locations, switch-
gear environment, class 3K3
Storage -40° C to +70° C
Permitted ambient temperature -5° C to +55° C
Equipment Weight Height Width
Relay without RXTUG 22H Approximately 1.3 kg 4U 12C
Function Phase-current Neutral-current
Main CT ratio Primary value 1.00 A-100 kA 1.00 A-100 kA
Secondary value 0.40 A-10.0 A 0.40 A-10.0 A
Phase and neutral cur-
rent (1A and 5A) Secondary current 0.00-9.99 A
10.0-99.9 A
100-999 A
Primary current 0.00 -9.99 A, kA, MA
10.0-99.9 A, kA
100-999 A, kA

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 14
Table 13: Overcurrent protection
Neutral current (0.1 A) Secondary current - 0-199 mA
- 0.20-9.99 A
Primary current - 0-199 mA
- 0.20-9.99 A
- 0-9.99 kA, MA
- 10-99.9 A, kA
- 100-999 A, kA
Frequency Fr50 Hz 40.0-60.0 Hz -
60 Hz 50.0-70.0 Hz -
Accuracy +/- 0.1 Hz -
Overcurrent protection Stage I> Stage I>> Stage I>>>
Setting range (0.2-3.0) x Ir(1.0-20) x I> (1.0-20) x I>
Limiting errors of set operate value for current
measuring 50/60 Hz < 3% < 3% < 3%
Consistency of set operate value 50/60 Hz < 1% < 1% < 1 %
Typical reset ratio 95%
Typical operate time I = 0 => 3 x set operate
value 40 ms
Typical reset time I = 3 => 0 x set operate
value 45 ms
Transient over-reach L/R = 50, 100, 200 and
500 ms < 5%
Typical overshoot time 30 ms
Recovery time at I = 3 x set operate value < 55 ms
Frequency depen-
dency Fr= 50 Hz (45-55 Hz) < 5%
Fr= 60 Hz (54-66 Hz) < 5%
150/180 Hz Typical 1.5/2.0 x set operate value
250/300 Hz Typical 3.0/4.0 x set operate value
Influence of har-
monics 100/120 Hz, 10% < 2%
150/180 Hz, 20% < 6%
250/300 Hz, 20% < 3%
Temperature dependence within range -5° C
to +55° C < 2%
Function Phase-current Neutral-current

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 15
Table 14: Time functions for overcurrent protection
Table 15: Earth-fault protection
Time function Stage I> Stage I>> Stage I>>>
Time delay Inverse or definite
time (NI, VI, EI, LI
and RI)
Definite
time Definite time
Setting range, definite time 0-20 s
Accuracy, definite time +/− 30 ms
Setting range, inverse time k = 0.05-1.1 - -
Min time, inverse time 0-2.0 s - -
Accuracy,
inverse timea) NI, VI,
EI, LIb) 2.0 x I>set 12.5% and +/-30 ms - -
5.0 x I>set 7.5% and +/-30 ms
10.0 x I>set 5% and +/-30 ms
20.0 x I>set 5% and +/-30 ms
RI 1.0 - 1.3 x I>set 12.5% and +/-30 ms - -
1.3 - 20.0 x I>set 5% and +/-30 ms
Linear reset time 0-500 s - -
a) A percentage value of theoretical time and a definite time delay
b) According to IEC 60225-3, signed error 5.
Earth-fault protection Stage IN> Stage IN>> Stage IN>>>
Setting range (0.1-2.5) x INr(1.0-20) x IN> 1.0-20) x IN>
Limiting errors of set operate value for current
measuring 50/60 Hz < 3% < 3% < 3%
Consistency of set operate value 50/60 Hz < 1% < 1% < 1%
Typical reset ratio 95%
Typical operate time I = 0 => 3 x set operate
value 40 ms
Typical reset time I = 3 => 0 x set operate value 45 ms
Transient over-reach L/R = 50, 100, 200 and
500 ms < 5%
Typical overshoot time 30 ms
Recovery time at I = 3 x set operate value < 55 ms
Frequency depen-
dency Fr= 50 Hz (45-55 Hz) < 5%
Fr= 60 Hz (54-66 Hz) < 5%
150/180 Hz Typical 1.5/2.0 x set operate value
250/300 Hz Typical 3.0/4.0 x set operate value

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 16
Table 16: Time functions for earth-fault protection
Influence of har-
monics 100/120 Hz, 10% < 2%
150/180 Hz, 20% < 6%
250/300 Hz, 20% < 3%
Temperature dependency within range -5° C to
+55° C < 2%
Time function Stage IN> Stage IN>> Stage IN>>>
Time delay Inverse, definite or log-
arithmictime (NI, VI, EI,
LI, RI and Log)
Definite
time Definite time
Setting range, definite time 0-20 s
Accuracy, definite time +/-30 ms
Setting range, inverse time k = 0.05-1.1 - -
Min time, inverse time 0-2.0 s - -
Accuracy,
inverse
timea)
NI, VI,
EI, LIb) 2.0 x I>set 12.5% and +/-30 ms - -
5.0 x I>set 7.5% and +/-30 ms
10.0 x I>set 5% and +/-30 ms
20.0 x I>set 5% and +/-30 ms
RI 1.0-1.3 x I>set 12.5% and +/-30 ms
1.3-20.0 x I>set 5% and +/-30 ms
Setting range, logarithmic time (IDG) k = 1-4 - -
Min time, logarithmic time 1.0-2.0 s - -
Formula, logarithmic time t = 5.8-1.35 x In (I/INset)- -
Accuracy, logarithmic time +/-50 ms overall - -
Linear reset time 0-500 s - -
a) A percentage value of theoretical time and a definite time delay
b) According to IEC 60255-3, signed error 5
Earth-fault protection Stage IN> Stage IN>> Stage IN>>>

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 17
Diagrams
Figure 9: Terminal diagram 1MRK 001 083-CBA
Protection
assemblies Compact current
protection assembly
RAHL
The protection assemblies are of protective
class I equipment in which protection against
electric shock does not rely on basic insula-
tion only, but which includes additional
safety precautions in such a way that accessi-
ble conductive parts are connected to protec-
tive earth. The protections are based on the
compact current relay RXHL. Test device
RTXP 8, RTXP 18 and DC/DC-converter
RXTUG 22H can also be included for spe-
cific application requirements. Test device,
RTXP 8 and RTXP 18 are tools for relay test-
ing. DC/DC-converter RXTUG 22H can be
used either separately for a single protection
or to feed other protections of the same relay
family. With RXTUG 22H all requirements
concerning emission and immunity distur-
bances with this protection assembly will be
met.
The measuring relay has 5 binary outputs and
2 binary inputs. Protections are normally
available with output logic with heavy duty
contacts, relay RXME 18 with indicating
flag, and can upon request be completed with
an output logic of free choice. Output relays
are connected to separate auxiliary voltage.
The interface voltage for enable or block
impulses can be connected to either 48-60 V
DC or 110-220 V DC by connecting the volt-
age circuit to separate terminals. At delivery
all relays are connected for 110-220 V DC.
All the protections in the COMBIFLEX®
modular system are mounted on apparatus
bars. The connections to the protections are
done by COMBIFLEX®socket equipped
leads. All internal connections are made and
the protection assembly is tested before deliv-
ery from factory. The type of modules and
their physical position and the modular size
of the protection are shown in the diagrams of
the respective protection. Figure 10 shows an
example of a protection assembly.

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 18
The height and width of the protection assem-
bly are given in the circuit diagram with
height (U) and width (C) modules, where U =
44.45 mm and C = 7 mm. The depth of the
protection assembly, including space for the
connection wires, is approximately 200 mm.
Protection
assemblies
The table below shows the different variants
of the compact current relay RXHL 401 in
protection assemblies type RAHL 401.
se980096
Figure 10: Protection assembly example
101 107 113 125
325
101 RTXP 18
107 RXTUG 22H
113 RXHL
125 RXME 18
325 RXME 18
30C
4U
RAHL 401
protectionassembly
variants
Ordering No. Circuit diagram Terminal diagram Available
diagrams
1MRK 001 082-AB 1MRK 001 083-AB 1MRK 001 083-ABA On request
1MRK 001 082-BB 1MRK 001 083-BB 1MRK 001 083-BBA On request
101 107
101 RXTUG 22H
107 RXHL
101 107 113
101 RTXP 18
107 RXTUG 22H
113 RXHL

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 19
Mounting alternatives
The protection assemblies described in the
table above can be supplied in RHGX or
RHGS cases. RXHL 401 compact current
relay can also be supplied in the following
mounting alternatives.
1MRK 001 082-CB 1MRK 001 083-CB 1MRK 001 083-CBAa) b)
1MRK 001 082-DB 1MRK 001 083-DB 1MRK 001 083-DBA On request
1MRK 001 082-EBc) 1MRK 001 083-EB c) 1MRK 001 083-EBA c) b)
a) Terminal diagrams available in technical overview brochure for RXHL 401 and RAHL 401
b) Terminal and circuit diagrams available in installation and commissioning manual for RXHL 401 and RAHL 401
c) Selection of phase and neutral current must be the same, Ir= INr= 1 A or Ir= INr= 5 A
RAHL 401
protectionassembly
variants
Ordering No. Circuit diagram Terminal diagram Available
diagrams
101 107 113 125
325
101 RTXP 18
107 RXTUG 22H
113 RXHL
125 RXME 18
325 RXME 18
101 107 113
301
101 RTXP 8
107 RXTUG 22H
113 RXHL
301 RXME 18
Mounting of
RXHL 401
in RHGS 6.
MountingofRXHL401
in RHGS 12. Mounting of RXHL 401 in RHGS 30 with dual power supplies RXTUG 22H, individual test switches and
optional tripping relays.
RXHL
RTXP 8
RXME
18
Spare
RXHL
Spare
RTXP
18
RXME
18
Spare
RXHL
RTXP 8
RXHL
RXHL
RXHL
RXME
18
RXTUG 22H
RTXP 8 RTXP 8
RTXP 8
RXTUG 22H
RXME
18
Spare
RXME
18
RXME
18

Compact current relay and
protection assemblies RXHL 401 and RAHL 401
1MRK 509 062-BEN
Page 20
OrderingofRAHL
protections Basic data to specify
Options
RAHL protection Quantity: 1MRK 001 082- ____
Desired wording on the lower half of the test switch max. 13 lines with 14 characters per line.
AC inputs
Rated phase current Ir= 1 A, rated neutral current INr= 0,1 A 1MRK 000 322-FA
Rated phase current Ir= 1 A, rated neutral current INr= 1 A 1MRK 000 322-FB
Rated phase current Ir= 5 A, rated neutral current INr= 0,1 A 1MRK 000 322-FC
Rated phase current Ir= 5 A, rated neutral current INr= 1 A 1MRK 000 322-FD
Rated phase current Ir= 5 A, rated neutral current INr= 5 A 1MRK 000 322-FE
Auxiliary voltage for included auxiliary relay
RXME 18, 24 V DC RK 221 825-AD
RXME 18, 48-55 V DC RK 221 825-AH
RXME 18, 110-125 V DC RK 221 825-AN
RXME 18, 220-250 V DC RK 221 825-AS
Mounting alternatives Size
Apparatus bars (always included)
Equipment frame without door 4U 19” 1MRK 000 137-GA
Equipment frame with door 4U 19” 1MRK 000 137-KA
RHGX 4 4U 12C RK 927 001-AB
RHGX 8 4U 24C RK 927 002-AB
RHGX 12 4U 36C RK 927 003-AB
RHGX 20 4U 60C RK 927 004-AB
RHGS 30 6U x 1/1 19” rack 1MRK 000 315-A
RHGS 12 6U x 1/2 19” rack 1MRK 000 315-B
RHGS 6 6U x 1/4 19” rack 1MRK 000 315-C