ETAL ESS20-002-DC24V-2A Selective load protection with physical isolation in the event of a fault Datasheet

Electronic Circuit Breaker ESS20-0...
Description
Electronic circuit breaker type ESS20-0.. is designed to ensure
selective disconnection of individual loads in systems which are
powered by a DC 24 V switch-mode power supply.
DC 24 V power supplies, which are widely used in industry today, will
shut down the output in the event of an overload with the result that
one faulty load in the system can lead to complete disconnection of
all loads. As well as an unidentified failure this also means stoppage
of the whole system.
Through selective disconnection the ESS20-0.. responds much
faster to overload or short circuit conditions than the switch-mode
power supply. This is achieved by a combination of active current
limitation and well-proven circuit breaker technology including
physical isolation. The ESS20-0.. limits the highest possible current
to 1.8 or 1.5 times the selected rated current of the circuit breaker.
Thus it is possible to switch on capacitive loads of up to 75,000 µF
lamp loads, but they are disconnected only in the event of an overload
or short circuit.
For optimal adjustment to the application conditions the current rating
of the ESS20-0.. can be selected in fixed values from 0.5 A...10 A and
in adjustable variants 1 A/2 A or 3 A/6 A. Failure and status indication
are provided by a bicolour LED and an integral signal contact.
The ESS20-0.. features a width of only 12.5 mm and can be plugged
into the E-T-A power distribution socket Module 17plus and SVSxx
(for ESS20-003) ensuring ease of installation and saving space in
control cabinets.
US patent number: US 6,490,141 B2
Features
Selective load protection with physical isolation in the event of a fault.
All types of loads can be connected (small DC motors etc. on
request).
Active current limitation (1.8 or 1.5 times rated current IN = 8 A or
10 A) for safe connection of capacitive loads up to 75,000 µF and
on overload/short circuit.
Electronic trip characteristic.
Reliable overload disconnection with 1.1 x IN plus, even with long
load lines or small cable cross sections (see table 2).
Selectable current ratings (fixed values 0.5 A...10 A or two steps:
1 A/2 A or 3 A/6 A).
Manual ON/OFF button (push-push actuation).
Clear status and failure indication.
Width per unit only 12.5 mm.
Plug-in mounting utilising power distribution system Module 17plus
or SVSxx (for ESS20-003), see product group 7.
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Approvals
Authority
Norm
Voltage ratings
Current ratings
VDE
EN
60934
DC 32 V
0.5 A…10 A
UL
UL 1077
DC 28 V
0.5 A…10 A
l
The user should ensure that the cable cross sections of the relevant
load circuit are suitable for the current rating of the ESS20 used.
Automatic start-up of machinery after shut down must be prevented
(Machinery Directive 98/37/EG and EN 60204-1). In the event of
a short circuit or overload the load circuit will be disconnected
electronically by the ESS20.
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Technical data
(Tambient = 25 °C, operating voltage US = DC 24 V)
Operating data
Operating voltage US
Current rating IN
Power consumption
Trip current (bimetal)
DC 24 V (18...32 V)
fixed current ratings: 0.5 A, 1 A, 2 A, 3 A,
4 A, 6 A, 8 A, 10 A
switchable: 1 A/2 A or 3 A/6 A
typically 13 mA
typically 0.3 A
(only in the event of a failure, before physical isolation)
Status indication
Bicolour LED:
by means of
Green: unit is ON, power-MOSFET is
switched on
Orange: in the event of overload or
short circuit until physical isolation
LED not lighted: push button in OFF
position
potential-free signal contact (change
over contact)
OFF-position of push button
Reverse polarity
internal bimetal (fail-safe element) trips,
protection of US
push button moves into OFF position
Load circuit
Load output
Power-MOSFET switching output
(high side switch)
Max. data of load
with side-by-side mounting see table 1
Voltage drop at IN
see table 1
Overload disconnection
typically 1.1 x IN (1.05...1.35 x IN)
Short-circuit current IK
typically 1.8 x IN / active current
limitation
Trip time
see time/current characteristics
for physical isolation
typically 5 sec at Iload > 1.1 x IN
for electronic disconnection typically 5 sec...100 ms at Iload > 1.8 x IN
or 1.5 x IN
Temperature disconnection internal temperature monitoring with
physical isolation
Low voltage monitoring
load outputOFF at US < 7 V
ON at US >16 V
Starting delay tstart
typically 0.3 sec after every switch-on
and after applying US
Notes
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ESS20-0..
Disconnection of load circuit single pole (switch contact)
- by push-push actuation of the blue
push button
- upon electronic fault disconnection
(overload, short circuit)
- with reverse polarity
Free-wheeling circuit
external free-wheeling diode recommended with inductive load
Several load outputs must not be connected in parallel.
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4
Electronic Circuit Breaker ESS20-0...
Technical data
Ordering information
(Tambient = 25 °C, operating voltage US = DC 24 V)
Type No.
Fault indication, signal output
ESS20 Electronic Circuit Breaker with current limitation (e.g. typically
Fault indications
potential-free auxiliary contact change-over
1.8 times rated current or 1.5 x IN, see table 1)
(SC-SO / SC-SI) simultaneously with Version
physical isolation
0
with physical isolation in the event of a failure
max. DC 30 V / 0.5 A, min. 10 V / 10 mA
Control input
Signal output ESS20-001 blue push button in ON position:
0 without control input
(single signalisation N/O) signal contact SC-SI is closed
Signal output
blue push button in OFF position:
1 signal contact N/O (single signalisation)
signal contact SC-SI is open
2 signal contact N/C (single signalisation)
Signal output ESS20-003 blue push button in ON position:
3 signal contact changeover (group signalisation)
(group signalisation N/C) signal contact SC-SO is closed
Operating voltage
(SC-SI is copen)
DC 24 V rated voltage DC 24 V blue push button in OFF position:
Current rating
signal contact SC-SO is open
0.5 A
(SC-SI is closed)
1 A
Visual indication
LED lighted in ORANGE 2 A
(until physical isolation)
3 A
General data
4 A
6 A
Backup fuse for ESS20-0.. not required because of the integral 8 A
redundant fail-safe element (thermal E–T–A circuit breaker)
10 A
push button in OFF position when
1 A/2 A (selectable)
fail-safe element has tripped.
3 A/6 A (selectable)
Blade terminals
6.3 mm to EN 60934-6.3-0.8
ESS20 - 0
0 3 - DC 24 V - 3 A/6 A ordering example
Housing material
plastics material
(recommended type)
Mounting of housing
plug-in mounting utilising power distribution system Module 17plus or SVSxx
Ambient temperature
0...+50 °C (without condensation, see
Preferred types
Preferred types
Standard current ratings (A)
0.5 1
ESS20-003-DC24V
ESS20-001-DC24V
2
3
4
6
8 10 1/2 3/6
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Dimensions
60
operating area
Dimensions (W x H x D)
Mass
102 ON
Supplementary Protectors for use in Electrical Equipment
IEC/EN 60934 (fixed current ratings)
12.5 x 105 x 60 mm
approx. 65 g
105 OFF
Approvals
CE logo
UL 1077, File E67320
mounting area
Table 1: voltage drop, current limitation, max. load current
max. load current at
100 % ON duty
TU = 40 °C
0.5 A
100 m V
1A
140 mV
2A
180 mv
1.8 x IN
1.8 x IN
TU = 50 °C
0.5 A
0.5 A
1A
1A
2A
2A
5A
7A
10 A
280 mV
10 A
9A
1 A/2 A
140 mV/280 mV
1.8 x IN
1 A/2 A
1 A/2 A
3 A/6 A
140 mV/280 mV
1.8 x IN
3 A/6 A
3 A/5 A
Label
OK
xA
2
adjustable
xA
Attention: when mounted side-by-side without convection the ESS20-0.. should not carry
more than 80 % of its rated load with 100 % ON duty because of the integral thermal
circuit breaker.
OK
6A
8A
1.8 x IN
1.5 x IN
1.5 x IN
OK
280 mV
220 mV
OK
6A
8A
xA
4A
xA
4A
xA
3A
1.8 x IN
xA
3A
190 mV
xA
140 mV
4A
blade terminals
EN 60934-6.3-0.8
6 x 6,8 = 40,8
xA
3A
1.8 x IN
1.8 x IN
reverse plug-in
protection
6,8
12,5
active current
limitation (typically)
12,5
typically voltage
drop UON at IN
12,2
current
rating IN
10,3
4
EN 60204-1)
Storage temperature
-20...+70 °C
Humidity
96 hrs/95 % RH/40 °C to
IEC 60068-2-78, test Cab.
climate class 3K3 to EN 60721
Vibration
3 g, test to IEC 60068-2-6 test Fc
Degree of protection
housing: IP30 DIN 40050
terminals: IP00 DIN 40050
EMC
emission: EN 61000-6-3
(EMC directive, CE logo) susceptibility: EN 61000-6-2
Insulation co-ordination 0.5 kV/2 pollution degree 2
(IEC 60934)
re-inforced insulation in operating area
Dielectric strength
(see dimensions)
operating area
test voltage AC 1000 V
installation area
test voltage AC 500 V
load circuit-signal contact test voltage AC 500 V
Insulation resistance
> 100 MΩ (DC 500 V)
(OFF condition)
[LINE (+) –­ LOAD (+)]
LED
This is a metric design and millimeter dimensions take precedence ( mm )
inch
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Electronic Circuit Breaker ESS20-0...
Terminal wiring diagrams (e. g. adjustable 3 A/6 A)
Basic circuit diagrams (e. g. adjustable 3 A/6 A)
ESS20-001-…
LOAD (+)
SI
S0
SC
LINE (+)
Gnd (-)
status indication
green / orange
rated current IN
3A
6A
Rsense
SO SI SC
LOAD (+)
signal output
load output
electronic control unit
ON / OFF
current
measurement
short circuit /
overload
control
LINE (+)
DC 24 V
SI
Made in Germany
Electronic Supplementary Protector
ESS20-001-DC24V-3A/6A
ESS20-001-... (single signalisation N/O)
GND (-)
ESS20-002-…
status indication
green / orange
rated current IN
3A
6A
Rsense
SO SI SC
LOAD (+)
signal output
load output
electronic control unit
LOAD (+)
SI
S0
SC
LINE (+)
Gnd (-)
ON / OFF
current
short circuit /
measurement
overload
control
LINE (+)
DC 24 V
SI
Made in Germany
Electronic Supplementary Protector
ESS20-002-DC24V-3A/6A
ESS20-002-... (single signalisation N/C)
4
GND (-)
ESS20-003- …
control
status indication
green / orange
rated current IN
3A
6A
Rsense
SO SI SC
signal output
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LOAD (+)
electronic control unit
LOAD (+)
SI
S0
SC
LINE (+)
Gnd (-)
ON / OFF
current
short circuit /
measurement
overload
Made in Germany
LINE (+)
DC 24 V
SI
ESS20-003-DC24V-3A/6A
Electronic Supplementary Protector
ESS20-003- ... (group signalisation with change over)
GND (-)
load output
3
Electronic Circuit Breaker ESS20-0...
Time/Current characteristic curve (TA = 25 °C)
disconnection
typically 1.1 x IN 1.8 x IN
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The trip time is typically 5 s in the range between 1.1 and 1.8 x IN*1).
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Electronic current limitation starts at typically 1.8 x IN*1) which
means that under all overload conditions (independent of the
power supply and the resistance of the load circuit) the max.
overload until disconnection will not exceed 1.8 x IN*1) times
the current rating. Trip time is between 100 ms (short circuit
current IK) and 5 sec (at overload with high line attenuation).
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Without the current limitation activated at typically 1.8 x IN*1) a
considerably higher overload current would flow in the event of
an overload or short circuit.
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After detection of an overload or short circuit the LED changes
colour from GREEN to ORANGE. The LED will no longer be
lighted after the circuit breaker has tripped.
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Resetting the circuit breaker is not possible before the integral
bimetal has cooled down (approx. 10 sec).
10000
1000
trip time in seconds
100
current limitation
typically 1.8 x IN
10
5
1
0. 1
0.01
0
1
2
5 IK
4
3
...times rated current
*1)
current limitation typically 1.8 x IN times rated current at
IN = 0.5 A...6 A
current limitation typically 1.5 x IN times rated current at
IN = 8 A...10 A
Table 2: Reliable trip of ESS20
Reliable trip of ESS20 with different cable lengths and cross sections
Resistivity of copper
0
= 0.0178 (Ohm x mm2) / m
US = DC 19.2 V (= 80 % v. 24 V)
voltage drop of ESS20 and tolerance of trip point (typically 1.1 x IN = 1.05...1.35 x IN)
have been taken into account.
ESS20-selected rating IN (in A) ➞
3
e. g. trip current Iab = 1.25 x IN (in A) ➞
4
Rmax in Ohm = (US / Iab) - 0.050 ➞
6
3.75
7.5
5.07
2.51
➞ ESS20 trips after 3...5 s
The ESS20 reliably trips from 0 Ohm to max. circuitry resistance Rmax
Cable cross section A in mm2 ➞
0.14
0.25
0.34
0.5
0.75
1
1.5
5
1.27
0.71
0.52
0.36
0.24
0.18
0.12
10
2.54
1.42
1.05
0.71
0.47
0.36
0.24
cable resistance in Ohm = (R0 x 2 x L) / A
cable length L in meter (= single length)
15
3.81
2.14
1.57
1.07
0.71
0.53
0.36
20
5.09
2.85
2.09
1.42
0.95
0.71
0.47
25
6.36
3.56
2.62
1.78
1.19
0.89
0.59
30
7.63
4.27
3.14
2.14
1.42
1.07
0.71
35
8.90
4.98
3.66
2.49
1.66
1.25
0.83
40
10.17
5.70
4.19
2.85
1.90
1.42
0.95
45
11.44
6.41
4.71
3.20
2.14
1.60
1.07
50
12.71
7.12
5.24
3.56
2.37
1.78
1.19
75
19.07
10.68
7.85
5.34
3.56
2.67
1.78
100
25.34
14.24
10.47
7.12
4.75
3.56
2.37
125
31.79
17.80
13.09
8.90
5.93
4.45
2.97
150
38.14
21.36
15.71
10.68
7.12
5.34
3.56
175
44.50
24.92
18.32
12.46
8.31
6.23
4.15
200
50.86
28.48
20.94
14.24
9.49
7.12
4.75
225
57.21
32.04
23.56
16.02
10.68
8.01
5.34
250
63.57
35.60
26.18
17.80
11.87
8.90
5.93
Example 1:
max. length at 1.5 mm2 and 3 A ➞ 214 m
Example 2:
max. length at 1.5 mm2 and 6 A ➞ 106 m
Example 3:
mixed wiring:
R1 = 40 m in 1.5 mm2 and R2 = 5 m in 0.25 mm2:
(Control cabinet – sensor/actuator level) R1 = 0.95 Ohm, R2 = 0.71 Ohm
Total (R1 + R2) = 1.66 Ohm
4
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Electronic Circuit Breaker ESS20-0...
Accessories for ESS20-0..
Single mounting sockets
(up to 16 A max. load)
17-P10-Si
17-P70-Si
11
12
24
23
2(i)
12.5
.492
80
3.15
symmetrical rail
EN 50022-35x7.5
adapter X20040901
polarization recess
polarized
recess
12.5
.492
50
1.97
4.4
.173
75
2.95
6 x .268 = 1.61 6.8
.268
10
.394
2
.079
6
.236
max. 30
max. 1.18
G-profile
EN 50035-G32
Connector bus links -P10
X 210 588 01/ 1.5 mm2, (AWG 16), brown (up to 13 A max. load)
X 210 588 02/ 2.5 mm2, (AWG 14), black (up to 20 A max. load)
X 210 588 03/ 2.5 mm2, (AWG 14), red (up to 20 A max. load))
X 210 588 04/ 2.5 mm2, (AWG 14), blue (up to 20 A max. load)
100 quick-connect tabs 6.3 (.250)
DIN 46247 tinned brass,
insulated
~70
~2.76
Busbar (10-way) (supplied as a complete package)
for type 17 socket
(for max. 100 A continuous load),
more positions available on request
X 211 157 01 with terminal
X 211 157 02 without terminal
Phoenix terminal AKG 35
max.cross section 35 mm2 (AWG 2)
50
1.97
57.4
2.26
64
2.52
64
2.52
2(k)
25
.984
21
.827
45.8
1.80
5
.197
41.3
1.63
1
50
1.97
57.4
2.26
6 x 6.8 = 40.8
10
.394
12.5
.492
10
.394
1.4
.055
33.3
1.31
8.5
.335
24
2(i)
23
6.5
.256
25.8
1.02
11
2.8
.110
6.3
.248
depth
10 mm
(.394 in.)
22.2
polarized blade terminals
7.4 DIN 46244-A6.3-0.8 (QC .250) .874
.291
6.25
12.5
.246
.492
4.4
.173
-P70
10
.394
slot for fitting labels from
Phoenix, Weidmüller
7.4
.291
3.5
.138
blade terminal DIN 46244 part 2
C profile (2xA2.8-0.8) (QC 2x.110)
-P10
2(k)
12
6-way mounting socket
63-P10-Si
17-P10-Si-20025
17-P70-Si-20025
polarized blade terminal
DIN 46244-A6.3-0.8 (QC .250)
1
2-way mounting socket
23-P10-Si
(with adapter)
cylinder head screw washer
M4x4 ISO1207
A 4.3 DIN 125
nickel plated
nickel plated
2
.079
Dimensions
Cu rail, tin-plated
4
Module 17plus
For technical data see section Power Distribution Systems
12,5
pressure-relief joint
(1.1mm (.043 in.)
thick constriction
154.8
6.09
Electronic Supplementary Protector
12.8
.504
5.4
.213
125
4.92
17
.669
9
.354
147,7
Insulating sleeving for busbar (10-way)
Y 303 824 01
ESS20-xxx-DC24V-xxA
7
.276
Made in Germany
10
.394
M4
female
connector
Modul 17plus
This is a metric design and millimeter dimensions take precedence ( mm )
inch
Made in Germany
6
115
6
symmetrical rail
EN 50022-35x7.5
right-side terminal block
14
11
12
2
12
2
1 Line 1 Line
14
slot for busbar
11
25
left-side terminal block
module
All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.
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Electronic Circuit Breaker ESS20-0...
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