Download Earth fault relays with separate toroids Vigirex Merlin Gerin

Earth fault relays with
separate toroids
Catalogue
Vigirex Merlin Gerin
We do more with electricity
earth fault relays
with separate toroids
Vigirex
page
1/ presentation
2
2/ functions and
characteristics
5
3/ installation
and connection
13
4/ complementary
technical information
17
5/ catalogue numbers
23
3
Vigirex: presentation
042587
earth fault relays with separate toroids
The choice of the right Vigirex relay model for
a given application depends on the type of
protection required:
c additional protection against direct contact;
c protection against indirect contact;
c protection against fire hazards;
c source ground fault protection;
c motor protection.
These five types of protection are covered by
standards and correspond to different current
thresholds and time delays on the products.
Operation
Vigirex relays are designed for use on low
voltage AC installations. When the residual
current detected by the toroid exceeds a
certain threshold, referred to as the residual
operating current In, the Vigirex relay trips
the associated circuit breaker via a voltage
release on the breaker.
The control signal issued by the relay may
be instantaneous or delayed.
Depending on the model, the operating
thresholds and time delays may or may not
be adjustable.
Vigirex:
earth fault protection
functions
Auxiliary power alarm
Loss of the auxiliary power supplying Vigirex
relays is indicated by a LED on the front of
the device and by the operation of a fail-safe
alarm contact.
Discrimination and settings
c discrimination
Discrimination consists in:
v dividing the installation into a number of
groups of circuits and protecting each group
with an appropriate residual current device,
v coordinating the upstream and downstream
devices such that only the faulty section is
shut down.
Vigirex relays can be set to obtain up to eight
levels of discrimination, extending from the
final outgoers up to the circuit breaker at the
head of installation.
I∆n/2 alarm threshold
Vigirex type AP relays have an alarm
threshold that warns of a non-critical
degradation of the insulation, leaving time to
carry out preventive maintenance.
The alarm threshold is set automatically at
In∆/2, where I∆/n is the residual operating
current.
The alarm is indicated by a LED and operates
an auxiliary contact.
4
PE
N
1
2
3
Use
Vigirex relays are used on low voltage AC
installations with TT, IT or TNS system
earthing arrangements for voltages up to
1000 V AC and frequencies up to 400 Hz.
They are particularly well suited for use with
Compact and Masterpact circuit breakers
equipped with voltage releases.
The purpose of earth fault protection is to
measure the earth leakage current of an
electrical installation, or part of an
installation, and interrupt the supply of power
if this current becomes dangerous to life or
property.
Vigirex is a range of earth fault relays with
separate toroids, a solution offering both
flexibility and performance.
Indication and protection
Vigirex relays are available in two versions:
c without earth fault memory: indication only.
Non-latching relay;
c with earth fault memory: indication and
circuit breaker tripping. Latching relay.
E26408
c settings
Discrimination is said to be total if the
protection devices meet two conditions:
v the non-operating current of the upstream
device is higher than the operating current of
the downstream device,
v the non-operating time of the upstream
device is longer than the operating time of the
downstream device.
E26350
operation and use
RH ...
Vigirex
standards
c IEC 364 ch 4 and 5;
c IEC 755;
c IEC 947.2 appendix B;
c UTE C 60-130;
c VDE 664;
c NF C 61-141 ad. 1;
c NF C 15-100.
toroids
Vigirex relays are used with closed (type A,
diameter 30 to 300 mm) or split (type OA,
diameter 46 to 110 mm) toroids. All toroids
are easy to mount due to a wide range of
installation possibilities.
I∆n = 1A
t = 500 ms
HV/LV
I∆n = 300 mA
t = 250 ms
RH ...
I∆n = 100 mA
t = 90 ms
RH ...
I∆n = 30 mA
t=0s
RH ...
Merlin Gerin
model codes
RH328AP
Earth fault relay
32 residual operating current settings I∆n
8 time delays
auxiliary power alarm
I∆n/2 alarm
screw terminals
E30466
main characteristics of a
type AP relay
I∆n/2 alarm
c d immunity to nuisance tripping;
c k class A direct component withstand;
c continuous monitoring of the detection
circuit;
c operation under all unbalanced phase
conditions;
c status indications:
v red LED: fault,
v orange LED: alarm threshold exceeded
(warning),
v green LED: auxiliary power on;
c discrimination over several levels so that
only the faulty circuit is shut down;
c fault alarm with or without fail-safe feature;
c I∆n/2 alarm;
c modular case, eight 9 mm modules wide;
c horizontal or vertical flush or surface
mounting on a symmetrical rail;
c automatic or remote reset.
1 2 3 4 5 6
auxiliary power
fault
MERLIN GERIN
vigirex
RH328A
on
test
test
reset
reset
I∆n setting
7
8
9 10 11 12 13 14
screw terminals
RH328AP
sealable cover
time delays
E28177
E28176
E28175
application examples
protection of persons*
e.g.: I∆n = 30 mA
instantaneous
protection against fire hazards
e.g.: I∆n = 300 mA
90 ms time delay
protection of property (motors, etc.)
e.g.: I∆n = 3 A
250 ms time delay
*depending on the opening time of the circuit breaker or
associated contactor.
Merlin Gerin
5
6
Merlin Gerin
earth fault relays
with separate toroids
Vigirex
2/ functions and
characteristics
page
relay selection
6
RH type E relays
RH type A/AP relays
8
10
toroids
12
7
Vigirex: functions and characteristics
relay selection
type E relays
relay
associated
toroids
0 s
RH10E
type E
1
5
4
3
2
7
6
MERLIN GERIN
vigirex
RH240E
reset
test
8
protection against LV
direct and indirect
contact
+ fire
E18720
time delay
0.03 to
25 A
0 s
10 11 12 13 14
9
RH240E
1
3
2
4
type E
5
7
6
E18720
protection against LV
direct and indirect
contact
+ fire
residual
operating
current
0.03 or
0.3 A
E18710
installation
E18711
protection
MERLIN GERIN
vigirex
RH240E
reset
test
8
0 to 1 s
RH248E
type E
1
3
2
4
5
E18720
0.03 to
25 A
E18712
protection against LV
direct and indirect
contact
+ fire
+ motor
10 11 12 13 14
9
7
6
MERLIN GERIN
vigirex
RH248E
reset
test
8
10 11 12 13 14
9
installation
protection against LV
direct and indirect
contact
+ fire
residual
operating
current
0.03 or
0.3 A
time delay
relay
associated
toroids
0 s
RH10A
type A, OA
E18716
protection
1 2 3 4 5 6
E18721
type A relays
MERLIN GERIN
vigirex
RH10A
on
test
reset
0 s
RH320A
type A, OA
E18721
0.03 to
250 A
E18717
protection against LV
direct and indirect
contact
+ fire
+ earth
conductor
9 10 11 12 13 14
8
7
1 2 3 4 5 6
MERLIN GERIN
vigirex
RH320A
on
test
reset
0.03 to
250 A
0 to 1 s
RH328A
type A, OA
1 2 3 4 5 6
MERLIN GERIN
vigirex
RH328A
on
test
reset
7
8
9 10 11 12 13 14
E18718
protection against LV
direct and indirect
contact
+ fire
+ motor
+ earth
conductor
8
E18721
7
8
9 10 11 12 13 14
Merlin Gerin
type AP relays
relay
associated
toroids
RH10AP
type A, OA
E18721
installation residual
time delay
operating
current
protection against LV
0.3 or
0 s
indirect contact
1 A
+ fire
+
I∆n/2 alarm
E18713
protection
1 2 3 4 5 6
MERLIN GERIN
vigirex
RH10AP
on
test
reset
0.03 to
0 s
250 A
+
I∆n/2 alarm
9 10 11 12 13 14
RH320AP
type A, OA
E18714
protection against LV
direct and indirect
contact
+ fire
+ earth
conductor
8
1 2 3 4 5 6
E18721
7
MERLIN GERIN
vigirex
RH320AP
on
test
reset
0.03 to
0 to 1 s
250 A
+
I∆n/2 alarm
RH320AP
type A, OA
1 2 3 4 5 6
MERLIN GERIN
vigirex
RH320AP
on
test
reset
7
Merlin Gerin
9 10 11 12 13 14
E18714
protection against LV
direct and indirect
contact
+ fire
+ motor
+ earth
conductor
8
E18721
7
8
9 10 11 12 13 14
9
Vigirex: functions and characteristics
RH type E relays
operation
Used in conjunction with a standard
Merlin Gerin toroid (type E), this type of
relay trips the associated switching device
when it detects a residual current above the
set residual operating current (I∆n).
Depending on the model, tripping is either
instantaneous or delayed (RH248E).
Characteristics
c red LED indicates the trip threshold has
been exceeded;
c failure of the detection circuit (connecting
cable and toroid) trips the circuit breaker.
Advantages of the RH248E
c protection can be adapted to any
installation;
c vertical discrimination possible over a
number of levels.
installation
c live part in a disconnectable, insulating
moulded case, eight 9 mm modules wide,
with sealable transparent cover;
c horizontal or vertical mounting on a
symmetrical rail;
c connection by tunnel terminals for 2.5
mm2 wire sizes.
Vigirex relays
type of installation to be monitored
electrical characteristics
I∆n residual operating
current
number of settings
selector
time delay (ms)
device tests
reset
local indication
output contact
max. consumption
auxiliary power supply
operating range
local
automatic
number
contact type
rating
220/240 V AC p.f. = 0.7
220 V DC L/R = 0 s
120 V DC L/R = 0 s
48 V DC L/R = 0 s
24 V DC L/R = 0 s
48-240 V AC and 48-300 V DC
380-480 V AC
AC
DC
mechanical characteristics
weight (kg)
thermoplastic case
degree of protection
disconnectable
front panel
case
mounting
other characteristics
temperature range
operating
(as per IEC 755)
storage
environmental conditions tropicalisation
toroids
toroids to be used
toroid-relay connection
(1) Type T2 tropicalisation:
c damp heat: 55 °C, 95 % relative humidity,
28 cycles (as per IEC 68-2-30) ;
c salt spray: 5 % NaCl, 48 hours
3 months' storage (as per IEC 68-2-11).
(2) Maximum lengths: see table, page 16.
10
Merlin Gerin
RH240E
042054
042053
042052
RH10E
RH248E
LV AC - 50/60/400 Hz - type TT IT TNS
1: 30 mA (with toroids TE30 and PE50 only)
or 300 mA
0
24: 30 mA to 25 A, set by 2 selectors
(30 mA to 250 mA: with toroids TE30 and PE50 only, 300 mA to 25 A: all toroids diameters)
selector 1 : 30, 50, 75, 100, 125, 150, 200, 250
selector 2 :
x 1: 30 to 250 mA (with toroids TE30 and PE50)
multiplier
x 10: 300 mA to 2.5 A
coefficient
x 100: 3 A to 25 A
0
0, 50, 90, 140, 250, 350, 500, 1000
0
electronic + indicator light + contact
detection circuit
local, and remote by disconnection of the auxiliary supply
insulation fault or detection circuit failure by latched indicator light
1
1
changeover, latched
5A
5A
0.45 A
0.45 A
0.65 A
0.65 A
2.5 A
2.5 A
10 A
10 A
4 VA
4 VA
5 VA/3 W
5 VA/3 W
– 15 % / + 10 %
– 15 % / + 10 %
± 20 %
± 20 %
5A
0.45 A
0.65 A
2.5 A
10 A
4 VA
5 VA/3 W
– 15 % / + 10 %
± 20 %
0.3 kg
horizontal and vertical
IP 30
IP 20
0.3 kg
horizontal and vertical
IP 30
IP 20
0.3 kg
horizontal and vertical
IP 30
IP 20
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2 (1)
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2 (1)
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2 (1)
type E
by shielded wire(2)
type E
by shielded wire(2)
type E
by shielded wire(2)
Merlin Gerin
1
11
Vigirex: functions and characteristics
RH type A/AP relays
operation
Used in conjunction with a standard
Merlin Gerin toroid (type A or OA), this type
of relay trips the associated switching
device, after the selected time delay, when it
detects a residual current above the set
residual operating current (I∆n). The AP
version also issues an alarm when the
residual current exceeds half the residual
operating current (i.e. I∆n/2).
Characteristics
c green LED indicates presence of auxiliary
power;
c red LED indicates the trip threshold has
been exceeded;
c orange LED indicates the alarm threshold
has been exceeded (AP);
c failure of the detection circuit (connecting
cable and toroid) trips the circuit breaker.
Advantages
c protection can be adapted to any
installation;
c vertical discrimination possible over a
number of levels;
c an alarm threshold provides a warning of
a non-critical degradation of the insulation,
leaving time to carry out preventive
maintenance;
c auxiliary power alarm via fail-safe contact.
installation
Vigirex relays
type of installation to be monitored
electrical characteristics
I∆n residual operating
current
number of settings
selector
time delay (ms)
alarm (warning)
threshold
device tests
reset
local indication
time delay
local
automatic
insulation fault or detection circuit failure indicator light
alarm
output contacts
c live part in a disconnectable, insulating
moulded case, eight 9 mm modules wide,
with sealable transparent cover;
c horizontal or vertical flush or surface
mounting on a symmetrical rail;
c connection by tunnel terminals for wire
sizes:
v 1.5 mm2 for terminals 1 to 6;
v 2.5 mm2 for terminals 7 to 14.
fault
contacts
number
contact type
alarm
contact
rating
max. consumption
auxiliary power supply
operating range
number
contact type
380/415 V AC p.f. = 0.7
220/240 V AC p.f. = 0.7
220 V DC L/R = 0 s
120 V DC L/R = 0 s
48 V DC L/R = 0 s
24 V DC L/R = 0 s
48 to 240 V CA and 48 to 300 V DC
380 to 480 V CA
AC
DC
changeover
changeover
mechanical characteristics
weight (kg)
thermoplastic case
degree of protection
disconnectable
front panel
case
mounting
other characteristics
temperature range
operating
(as per IEC 755)
storage
environmental conditions tropicalisation
toroids
toroids to be used
toroid-relay connection
(1) Type T2 tropicalisation:
c damp heat: 55 °C, 95 % relative humidity,
28 cycles (as per IEC 68-2-30) ;
c salt spray: 5 % NaCl, 48 hours
3 months' storage (as per IEC 68-2-11).
(2) Maximum lengths: see table, page 16.
12
Merlin Gerin
042585
044321
RH320A
RH320AP
RH328A
044322
044320
RH10AP
042587
042583
RH10A
RH328AP
frequency - 50/60/400 Hz - type TT, IT, TNS
1 : 30 mA or 300 mA
-
300 mA or 1 A
-
0
-
32 : 30 mA to 250 A, set by 2 selectors
selector 1 :
30, 50, 75, 100, 125, 150, 200, 250 mA
selector 2 :
x 1 : 30 to 250 mA
x 10 : 300 mA to 2.5 A
multiplier
x 100 : 3 A to 25 A
coefficient
x 1000 : 30 A to 250 A
0
0, 50, 90, 140, 250, 350, 500, 1000.
auto. set to half the
auto. set to half the
residual op. current
residual op. current
200 ms
200 ms
auto. set to half the
residual op. current
200 ms
electronic + indicator light + contact
detection circuit
local, and remote by disconnecting the auxiliary power supply
by indicator light
by indicator light
with latching
with latching
by indicator light
without latching
2 : 1 standard +
1 standard
2 : 1 standard +
1 fail-safe
1 fail-safe
latched
latched
0
3A
5A
0.45 A
0.65 A
2.5 A
10 A
4 VA
5 VA/3 W
– 15 %/+ 10 %
± 20 %
1 fail-safe
non-latched
-
-
0
3A
5A
0.45 A
0.65 A
2.5 A
10 A
4 VA
5 VA/3 W
– 15 %/+ 10 %
± 20 %
by indicator light
without latching
1 standard
1 fail-safe
non-latched
-
-
by indicator light
with latching
2 : 1 standard +
1 fail-safe
latched or
non-latched
0
3A
5A
0.45 A
0.65 A
2.5 A
10 A
4 VA
5 VA/3 W
– 15 %/+ 10 %
± 20 %
0.4 kg
horizontal and vertical
IP 30
IP 20
0.4 kg
horizontal and vertical
IP 30
IP 20
0.4 kg
horizontal and vertical
IP 30
IP 20
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2(1)
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2(1)
– 5 °C to + 55 °C
– 40 °C to + 70 °C
type T2(1)
type A, OA
type A, OA
by shielded wire(2) or toroid plugged into relay for TA30 and PA50
Merlin Gerin
by indicator light
with latching
by indicator light
without latching
1 standard
1 fail-safe
non-latched
-
-
type A, OA
13
Vigirex: functions and characteristics
051352
042589
042596
toroids
closed toroids,
type A
split toroids,
type OA
closed toroids,
type E
for:
Vigirex RH10A, RH10AP, H320A,
RH320AP, RH328A, RH328AP
for:
Vigirex RH10A, RH10AP, H320A,
RH320AP, RH328A, RH328AP
for:
Vigirex RH10E, RH240E, RH248E
c closed toroids for new installations
and extensions.
c split toroids for renovations
and extensions.
c closed toroids for new installations
and extensions.
c detect the leakage current and
transmit a proportional signal to
the associated relay.
c detect the leakage current and
transmit a proportional signal to
the associated relay.
c detect the leakage current and
transmit a proportional signal to
the associated relay.
c enclosed in an insulated
casing;
c mounting, 3 possibilities:
v ∅ 30-50 for clipping onto
Vigirex relay,
v ∅ 30-50-80 on a symmetrical rail;
v any diameter on plate and cables;
c connection:
v ∅ 30-50 plugged directly into
Vigirex relay,
v ∅ 30 to 200 by connectors for
0.22 mm2 wires min.;
v ∅ 300 by 6.35 mm tab connectors.
c enclosed in an insulated
casing;
c mounted on plate or cable.
c enclosed in an insulated
casing;
c mounted on plate or cable.
utilisation
functions
installation
dimensions
type A
TA
PA
IA
MA
SA
GA
∅ (mm)
30
50
80
120
200
300
type OA
POA
GOA
∅ (mm)
46
110
type E
TE30
PE50
IE80
ME120
SE200
∅ (mm)
30 (all settings)
50 (all settings)
80 (settings u 300 mA)
120 (settings u 300 mA)
200 (settings u 300 mA)
electrical characteristics
transformation
ratio
maximum permissible
current:
1 kA continuous 2.5 kA/1 s - 30 kA/0.05 s
1/1000
1/1000
1/1000
c
c
c
mechanical characteristics
weights (kg)
∅
∅
∅
∅
∅
∅
∅
∅
30
50
80
120
200
300
46
110
0.120
0.200
0.420
0.590
1.320
2.230
other characteristics
temperature range
storage
operating
degree of protection
14
– 40 °C to + 70°C
– 5 °C to + 55 °C
IP 20
0.120
0.200
0.510
0.690
1.570
1.300
3.200
– 40 °C to + 70°C
– 5 °C to + 55 °C
IP 20
– 40 °C to + 70°C
– 5 °C to + 55 °C
IP 20
Merlin Gerin
earth fault relays
with separate toroids
Vigirex
3/ installation
and connection
page
relays
14
toroids
15
auxiliaries
16
15
Vigirex: installation and connection
relays
Key:
aa: auxiliary power supply
t : type A, AO, or E toroid depending on
relay
ut:
RH10E, RH240E, RH248E
ut: used for control of a switching device
RH10A, RH320A, RH328A
ut1, ut2: remote indication or control
of a switching device
ut1: standard changeover contact
ut2: fail-safe contact
RH10AP, RH320AP, RH328AP
ut1: standard changeover contact for
control of a switching device
ut2: fail-safe alarm contact
E18710
E18459
RH10E-RH240E-RH248E
1
2
3
4
5
N
L1
L2
L3
ut
7
6
MERLIN GERIN
vigirex
RH240E
reset
test
t
1
8
9
1 2 3
10 11 12 13 14
2
6 7
8 9
aa
E18460
E18718
RH10A/AP-RH320A/AP-RH328A/AP
1 2 3 4 5 6
N
L1
L2
L3
MERLIN GERIN
vigirex
RH328A
E18710
on
7
8
t
test
2
reset
7 8
6
9 10 11 12 13 14
aa
ut1
ut2
RH10E-RH240E-RH248E
RH10A/AP-RH320A/AP-RH328A/AP
Mounted on symmetrical rail IP 20
Flush mounting IP 30
81
E26291
45
Surface mounting IP 20
E26290
E26292
1
5
9 10 11 12 13 14
2 Ø4,2
46
66
45
44
60
65,5
16
4
81
72
65
73,5
73
37,5
73,5
57
72
10,5
Merlin Gerin
Vigirex: installation and connection
toroids
toroids
1
2
F H
E
Ø5
J
E
B
∅ B C D E F G H J
27 60 22 18 75 45 25 18 4
50 86 22 18 101 61 41 33 5
type
TE30
PE50
K L
34 28
50 28
29
C
60
87
D
53
66
E
82
108
F
50
60
type A
diam. 300
∅ B
type
C D E F G H J K L
IA80, IE80
80 122 26.5 35 150 80 55 40 126 65 44
MA120, ME120 120 164 26.5 35 190 80 55 40 166 65 44
37 274 120 90 60 255 104 46
type OA
diam. 46 and 110
Ø5
E24294
B
31
45
SA200, SE200 196 256 29
Ø
L
type
GA300
Toroid location
c on all the cables (phases and neutral) of a
feeder downstream of the switching device
associated with the Vigirex;
c for a TT system, if a toroid cannot be
installed on a transformer output (busbars or
cables in parallel): place a toroid on the
transformer neutral-earth path.
E12110
A, OA, E toroids
associated with the Vigirex
Line overcurrents due to motor starting or
transformer switching may cause
unnecessary tripping of residual current
type relays.
This can be avoided by a few very simple
precautions with cumulative effects:
c place the toroid on a straight section of
cable;
c centre the cable in the toroid;
c use a toroid with a much larger diameter
than the cable going through it
2 x dia (fig.1).
For very severe operating conditions, the
use of a mild steel sleeve placed around the
cable inside the toroid considerably
increases immunity.
Recommended characteristics:
c mild steel foil 0.1 mm thick to be wrapped
several times around the cable inside the
toroid (minimum thickness 1 mm);
c inner diameter of the toroid > 1.4 x outer
diameter of the cable bundle (fig. 2).
N1
23
figure 1
PE
E13856B
E13856 A
Key
v these toroids can only be used with relays
having I∆n residual operating currents
greater than 300 mA;
c no residual operating current restrictions.
immunity to line
overcurrents
H
N1
B
Ø
L
H
∅ H L
type ∅ H L
B C
299 29 344 POA 46 68 148 57 38
GOA 110 68 224 76 44
toroid
∅ mm
relays
RH10E
RH240E
RH248E
RH10A
RH320A
RH328A
RH10AP
RH320AP
RH328AP
Vigirex
Merlin Gerin
B
C
D
E24293
∅
30
52
C
D
L
4
21
Ø
C
type
TA30
PA50
K
G
J
E
D
8
5
L
2
FH
K B
G
Ø
1
Ø5
3
16
F
Ø
type E
diam. 30 and 50
E18722
2 Ø4,5
E18664
types A and E
diam. 80 to 200
E24291
type A
diam. 30 and 50
23
A, OA
30 to 300
E
E
30 and 50 80 to 200
c
c
c
v
v
v
c
c
c
c
c
c
PE
figure 2
17
Vigirex: installation and connection
auxiliaries
toroid-relay connection circuit
resistance must not exceed 3 ohms;
c shielded wires: available with 1 or 2
conductors in reels of 20 or 100 m;
c cable size 0.22 mm2.
2
wire size (mm )
max. length (m)
0,22
18
0,75
60
1
80
1,5
125
2,5
200
c the maximum toroid-relays connection
examples of type A mounting
On plate, type A or E, diam. 30 to 200
042591
On rail, diam. 30 to 80
042593
044323
On Vigirex, diam. 30 or 50
18
042590
044324
042592
On cable, diam. 120 to 300
Merlin Gerin
earth fault relays
with separate toroids
Vigirex
4/ complementary
technical information
page
implementation of residual
current devices
18
electrical systems
20
useful definitions
21
19
Vigirex: complementary technical information
implementation
of residual current devices (RCDs)
The use of residual current devices is
described below according to the type of
electrical system (TT, TN or IT).
Protection of sensitive locations against fire
hazards must also be considered.
For such locations, a residual current device
with a residual operating current i 300 mA
should be provided at the head of the feeder
concerned.
TT systems
exposed conductive parts interconnected and connected
to the same earthing electrode
1. Condition satisfied
A single device at the head of the installation
is sufficient to ensure protection against
electric shock.
Its residual operating current is selected
according to the resistance of the earthing
system.
E26961
introduction
HV/LV
RCD
2. Condition not satisfied
This is the case in particular in installations
where the loads are far apart.
It is essential to have:
c one RCD per group of interconnected
exposed conductive parts;
c one RCD at the head of the installation,
unless the head circuit breaker and the main
circuit breakers are in the same
switchboard or in switchboards located next
to one another (or linked by a class II
connection).
E26962
RB
HV/LV
RA
RCD
RCD
RA1
RB
RCD
RA2
Horizontal discrimination
This technique consists of transferring the
residual current protection from the head of
the installation to the downstream feeders:
in this case, power is cut only on the faulty
feeder. It is not possible unless the head
circuit breaker and the main circuit breakers
are in the same switchboard or in
switchboards located next to one another (or
linked by a class II connection).
E26963
improvement of operating conditions - implementation of
discrimination between residual current devices
HV/LV
RCD
Vertical discrimination
Downstream of the head circuit breaker, the
main circuit breakers are provided with
RCDs. In this case, power is cut only on the
faulty feeder, subject to compliance with the
following rules:
I∆nA > 2 x I∆nB,
T no A > T brk B,
I∆nA and I∆nB are the residual operating
currents of RCDs A and B,
T no A = non operating time of A,
T brk B = total break time of B (including the
time due to the switching device).
20
RA
E26964
RB
RCD
A
RCD
B
RCD
Merlin Gerin
1. Condition not satisfied
c substation earthing system not connected
to exposed conductive parts: place an RCD
at the head of the installation;
c exposed conductive parts not
interconnected:
place an RCD on each group of exposed
conductive parts. To be supplemented by an
RCD at the head of the installation unless
the head circuit breaker and the main circuit
breakers are in the same switchboard or in
switchboards located next to one another (or
linked by a class II connection).
Note: CIM is insulation monitoring device.
E26965
exposed conductive parts interconnected and connected
to the same earthing electrode, itself connected to the
substation earthing system
HV/LV
RCD
earthing
path
CIM
RB
E26966
IT systems
RA
RCD
HV/LV
RCD
RCD
CIM
RB
RA 1
RA 2
TN systems
Safety against electric shock is ensured by
the overcurrent protection. Residual current
devices must be used in the following cases:
c feeder with excessive cable length;
c circuit supplying portable equipment (such
as socket outlet circuits);
c circuit where there is a risk of the
protective conductor breaking.
E26967
2. Condition satisfied
Protection against electric shock in the event
of a double fault is provided by the
overcurrent protection.
Residual current devices must be used in
the following cases:
c feeder with excessive cable length;
c circuit supplying portable equipment (such
as socket outlet circuits);
c circuit where there is a risk of the
protective conductor breaking.
HV/LV
TNC system
TNS system
L1
L2
L3
N
PE
RCD
PE
RB
Merlin Gerin
21
Vigirex: complementary technical information
electrical systems
consequences of an
insulation fault
Reminder
An insulation fault occurs when a live
conductor - phase or neutral - comes in
contact with an exposed conductive part
(e.g. motor casing).
An insulation fault between phase and earth
causes a current flow which is limited in
practice only by the earthing resistances Rn
and RA. Hazardous voltages exist on the
exposed conductive parts. The fault current
is a few amperes.
E26968
TT systems
HV/380V
Consequences
The consequences depend upon the type of
electrical system (TT, IT or TN) used in the
installation or part of installation concerned.
Such faults create hazards to life and property.
L1
L2
L3
N
Tripping is essential.
In the example opposite, with the following
values for RA and Rn.
RA = 20 Ω ; Rn = 10 Ω.
The fault current is 7.3 (220 V/30 ohms) and
the voltage Ud on the exposed conductive
parts is 147 V.
Ud
Rn : 10Ω
RA : 20Ω
E26969
IT systems
HV/380V
L1
L2
L3
PE
B
Zct
Id
A
Uc
E26970
Rn
HV/380V
Id
L1
L2
L3
PE
50 m
50 mm2
Zct
30 m
25 mm2
Uc
Rn
Ra
E26971
TN systems
HV/380V
L1
L2
L3
PEN
RnA
22
The fault current depends on the insulation
impedance (Zct) of the installation in normal
operation.
As this impedance is high by its nature, the
fault current is relatively low. The same is
true for the voltage on the exposed
conductive parts.
Tripping is unnecessary.
The fault must be reported, located and
eliminated.
In this example, with Zct = 3500 ohms
(case of a 1 km installation).
The fault current is 62 mA (220 V/3500 ohms).
The touch voltage Uc between the two
simultaneously accessible exposed
conductive parts depends on the resistance
RAB of link AB.
In an extreme case where RAB = 2 ohms,
Uc = 2 x 0.062 = 0.124 V.
If a second fault occurs before the first fault
has been cleared, it rapidly becomes a short
circuit between phases (or between phase
and neutral), with the following
consequences:
c the exposed conductive parts carry a high
voltage;
c the fault current is equal to the short-circuit
current.
Tripping is essential.
The initial voltage on the busbar supplying
the two feeders must be estimated at
80 percent of the nominal voltage between
phases.
As the loop impedance is 99 milliohms
(neglecting the reactances), the fault current
is equal to 3070 A (380 x 0.8/0.099).
The touch voltage Uc is equal to half the
initial voltage, i.e.: 0.8 x 380/2 = 152 V.
An insulation fault results in a short-circuit
between phase and neutral.
The resulting current flow is high. The
exposed conductive parts are at a
hazardous voltage.
Tripping is essential.
The initial voltage on the faulty feeder must
be estimated at 80 percent of the nominal
voltage between phase and neutral. The
touch voltage Uc is equal to half 0.8 x 220 V,
i.e. 88 V.
Uc
Merlin Gerin
Vigirex: complementary technical information
useful definitions
The definitions below are intended for
practical purposes only and do not claim to
be exhaustive or theoretical.
Direct contact
Contact of persons with the normally live
parts of electrical equipment.
Discrimination
Coordination of the automatic switching
devices such that only the faulty part of the
installation is cut off by opening of the device
located immediately upstream of the fault.
Double insulation
insulation including both:
c basic insulation required for protection
against direct contact, and
c supplementary insulation required for
protection against indirect contact in case
of a fault of the basic insulation.
Exposed conductive part
Any accessible metal part of an electrical
equipment item other than the live parts and
which can accidentally become live.
Fault (electrical)
Accidental connection between two points at
different potentials, such as an
insulation fault. A fault may be solid or may
exhibit a certain impedance. A solid fault
between live conductors is a short circuit.
A distinction is made between phaseexposed conductive parts, phase-earth,
phase-phase, phase-neutral, neutralexposed conductive parts and neutral-earth
faults.
Fault voltage
Voltage, in case of an insulation fault,
across an exposed conductive part and an
earthing reference, i.e. a point on which the
voltage is not modified when the exposed
conductive part becomes live.
Indirect contact
Contact of persons with exposed conductive
parts accidentally live due to an insulation
fault.
Insulation voltage
Preferred term: rated insulation voltage. The
rated insulation voltage of an assembly is
the voltage characterising it and used as
reference for the dielectric tests, the isolating
distances and the creepage distance.
Live conductor
Conductor used for transmission of electrical
power during normal operation (including the
neutral conductor).
PEN conductor
In a TNC system, acts both as neutral
conductor and as protective conductor
(size u 10 mm2).
The presence of switchgear on such
conductors is prohibited.
Merlin Gerin
Protective conductor PE
Conductor used for protection against
indirect contact and for interconnecting
exposed conductive parts:
c to one another;
c to extraneous conductive parts;
c to earthing electrodes or earthed parts.
The presence of switchgear on such
conductors is prohibited.
Residual current
Root-mean-square vector sum of the
currents flowing through all the live
conductors. It is equal to zero in the
absence of an insulation fault. In case of an
insulation fault, the residual current is the
leakage current returned to the
source through the earth and the protective
conductor.
For the value of I∆n, see residual operating
current.
Touch voltage
Voltage in case of an insulation fault
across simultaneously accessible parts.
Uc = f(t) safety curve
Uc = f(t) is the maximum voltage that the
human body can withstand for a given
period of time, depending on external
conditions (nature of the premises, presence
of water, etc. - see NF C 15-100,
Sec. 481.1.1, table 48A).
Residual current device (RCD)
A device that opens the associated
switchgear when it detects a residual current
above its residual operating current I∆n (see
residual current).
Residual operating current (I∆n)
Value of the residual current which causes a
residual current device to operate.
Service voltage
Preferred term: rated operating voltage.
The rated operating voltage Ue of a system
is the voltage which, together with the rated
current of the system, determines the load.
For three-phase systems, it is the voltage
between phases.
Shock protection device
This device must automatically separate
from the source any part of the
installation on which there is a fault
hazardous to life.
Depending on the system earthing arrangement of the installation, this device is either
a residual current device (characterised by
I∆n, its residual operating current, and its
total break time) or an overcurrent device
(fuse or circuit breaker).
break time
Total time from fault detection to complete
arc extinction.
Time delay
Intentional delay before operation of a
device.
The time delay on operation of an upstream
circuit breaker allows time discrimination
with the downstream circuit breaker.
The time delay, which is voluntary, should
not be confused with the break time of a
device which is intrinsic to the device.
23
24
Merlin Gerin
earth fault relays
with separate toroids
Vigirex
5/ catalogue numbers
page
earth fault relays
accessories and toroids
25
Vigirex: price list
earth leakage relays with separate toroids
earth leakage relay RH10E
1
5
4
3
2
protection against direct and indirect contact + fire
network
sensitivity
time delay
single phase auxiliary power supply (V)
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
7
6
MERLIN GERIN
vigirex
RH10E
reset
test
300mA
inst.
50622
8
10 11 12 13 14
9
BT 50/60 Hz
0.03 or 0.3 A
0s
i∆n = 30 mA
50450
.
i∆n = 300 mA
50453
.
50449
50451
50621
.
.
.
50452
50454
50623
.
.
.
50456
.
50455
50457
50628
.
.
.
50459
.
50458
50460
50633
.
.
.
earth leakage relay RH240E
5
4
3
2
1
7
6
MERLIN GERIN
vigirex
RH240E
reset
test
x100
x10
100
125
30
250
150
75
200
50
x1
50632
mA
10 11 12 13 14
9
8
protection against direct and indirect contact + fire
network
sensitivity
time delay
single phase auxiliary power supply (V)
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
BT 50/60 Hz
0.03 to 25 A
0s
earth leakage relay RH248E
5
4
3
2
1
7
6
MERLIN GERIN
vigirex
RH248E
reset
test
x100
x10
100
125
30
250
75
50
x1
50632
350
90
200
50
500
inst.
1000
mS
10 11 12 13 14
9
8
250
140
150
mA
protection against direct and indirect contact + fire + motor
network
sensitivity
time delay
single phase auxiliary power supply (V)
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
BT 50/60 Hz
0.03 to 25 A
0 to 1 s
earth leakage relay RH10A
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH10A
test
reset
50637
8
7
9
10 11 12 13 14
protection against direct and indirect contact + fire
network
sensitivity
time delay
single phase auxiliary power supply (V)
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
440 to 480 V AC 50/60 Hz
BT 50/60/400 Hz
0.03 to 0.3 A
0s
i∆n = 30 mA
50733
.
i∆n = 300 mA
50736
.
50732
50734
50638
50639
.
.
.
.
50735
50737
50641
50642
.
.
.
.
50739
.
50738
50740
50647
50648
.
.
.
.
earth leakage relay RH320A
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH320A
x1
x10
x0,1
x100
test
A
0,1
0,075
0,05
0,03
0,125
0,15
0,2
0,25
reset
50646
7
24
8
9
10 11 12 13 14
protection against direct and indirect contact + fire + earth conductor
network
BT 50/60/400 Hz
sensitivity
0.03 to 250 A
time delay
0s
single phase auxiliary power supply (V)
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
440 to 480 V AC 50/60 Hz
Merlin Gerin
unit price (excl. VAT) in French francs
earth leakage relay RH328A
protection against direct and indirect contact + fire + earth conductor + motor
network
BT 50/60/400 Hz
sensitivity
0.03 to 250 A
time delay
0 to 1 s
single phase auxiliary power supply (V)
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH328A
x1
x10
x0,1
0,1
250
350
50
500
test
0,125
0,075
0,15
0,2
0,05
0,03
1s
inst.
x100
A
mS
140
90
0,25
reset
50652
8
7
10 11 12 13 14
9
12 V DC
24 V DC
48 V AC 50/60 Hz
48 to 120 V DC
110 to 130 V AC 50/60 Hz
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
440 to 480 V AC 50/60 Hz
500 to 525 V AC 50/60 Hz
standard
latched relay
+ fail safe
latched relay
50661
50662
50743
standard
unlatched relay
+ fail safe
unlatched relay
.
.
.
50746
.
50742
50744
50653
50654
50655
.
.
.
.
.
50745
50747
50657
50658
50659
.
.
.
.
.
i∆n = 300 mA
50663
50664
50665
.
.
.
i∆n = 1 A
50666
50667
50668
.
.
.
50672
50673
50674
50675
.
.
.
.
unlatched
relay
50683
50684
50685
50686
.
.
.
.
50055
.
earth leakage relay RH10AP
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH10AP
test
reset
50652
8
7
10 11 12 13 14
9
protection against indirect contact + fire
network
sensitivity
time delay
single phase auxiliary power supply (V)
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
440 to 480 V AC 50/60 Hz
BT 50/60/400 Hz
0.3 or 1 A + warning
0s
earth leakage relay RH320AP
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH320AP
x1
x10
x0,1
x100
test
A
0,1
0,125
0,075
0,15
0,2
0,05
0,03
0,25
reset
50652
8
7
10 11 12 13 14
9
protection against direct and indirect contact + fire + earth conductor
network
BT 50/60/400 Hz
sensitivity
0.03 to 250 A + warning
time delay
0s
single phase auxiliary power supply (V)
220 to 240 V AC 50/60 Hz
380 to 415 V AC 50/60 Hz
440 to 480 V AC 50/60 Hz
500 to 525 V AC 50/60 Hz
earth leakage relay RH328AP
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH328AP
x1
x10
x0,1
0,1
250
350
50
500
inst.
x100
test
A
mS
140
90
0,125
0,075
0,15
0,2
0,05
0,03
1s
0,25
reset
50652
8
7
10 11 12 13 14
9
protection against direct and indirect contact + fire + earth conductor + motor
network
BT 50/60/400 Hz
sensitivity
0.03 to 250 A + warning
time delay
0 to 1 s
single phase auxiliary power supply (V)
latched
relay
220 to 240 V AC 50/60 Hz
50679
380 to 415 V AC 50/60 Hz
50680
440 to 480 V AC 50/60 Hz
50681
500 to 525 V AC 50/60 Hz
50682
.
.
.
.
earth leakage relay RH328AF
protection against direct contact (30 mA)
specific for command motor by Telemecanique ATV66 variable speed controller
single phase auxiliary power supply (V)
220 to 240 V AC 50/60 Hz
1 2 3 4 5 6
MERLIN GERIN
vigirex
on
RH328A
x1
x10
x0,1
250
1s
350
50
x100
test
A
mS
140
inst.
90
500
0,1
0,075
0,05
0,03
0,125
0,15
0,2
0,25
reset
50652
7
8
9 10 11 12 13 14
Merlin Gerin
25
Vigirex: price list
earth leakage relays with separate toroids
unit price (excl. VAT) in french francs
accessories and toroids
toroid-relay link
toroids for RH10A/AP RH320A/AP - RH328A/AP
toroids for RH10E RH240E - RH248E
26
screened cable (cable size 0.22 mm2)
roll of 20 m
roll of 100 m
closed toroid, type A
type
TA
PA
IA
MA
SA
GA
opening toroid, type OA
type
POA
GOA
closed toroid, type E
type
TE30
PE50
IE80
ME120
SE200
1 conductor
50157
50158
2 conductors
50137
50136
.
.
Ø (mm)
30
50
80
120
200
300
50437
50438
50439
50440
50441
50442
.
.
.
.
.
.
Ø (mm)
46
110
50485
50486
.
.
Ø (mm)
30
50
80
120
200
50430
50431
50432
50433
50434
.
.
.
.
.
.
.
Merlin Gerin
000000000 © 1999 Schneider Electric - All right reserved
Schneider Electric Industries SA
5, rue Nadar
92506 Rueil-Malmaison Cedex France
Tel : +33 (0)1 41 29 82 00
Fax : +33 (0)1 47 51 80 20
As standards, specifications and designs change from time to time, please ask for confirmation
of the information given iin this publication
ce
document
a étéhas
imprimé
This
document
been printed on ecological paper
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Photo: Schneider Electric
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BTP207E
09-99