ETAL ESS31-TC-002-DC24V-3A Selective load protection with physical isolation in the event of a failure Datasheet

Electronic circuit breaker ESS31-T...-DC 24 V
Description
The model ESS31-T extends our product group of electronic overcurrent protection devices for DC 24 V applications. At a width of
only 12.5 mm it provides selective protection for all DC 24 V load
circuits. This is achieved by a combination of active electronic current
limitation in the event of a short circuit and overload disconnection
at typically 1.2 times rated current. The ESS31-T is track-mountable
and provides ease of installation for groups of devices with several
circuits. DC 24 V switch-mode power supplies are widely used in
automation today. In the event of an overload, however, they turn
down the output voltage which is intended to power all connected
loads. So if there is a failure in a single load of the system, the supply
voltage will break down also in all other load circuits. Not only does
this frequently cause undefined fault conditions, but it can even lead
to machine stoppages or system downtimes.
In this context selectivity means that type ESS31-T responds faster
to any overload or short circuit conditions in a load circuit than the
switch-mode power supply. This is ensured by the combination of
active electronic current limitation and well-proven circuit breaker
technology including physical isolation.
The max. possible overcurrent is limited to typically 1.2 times rated
current (see table 1). This allows switching on capacitive loads of up
to 40,000 µF, but a disconnection will only be effected in the event of
an overload or short circuit. For adjustment to the load conditions the
current rating can be selected in fixed values from 0.5 A to 12 A. Visual
status indication is by means of a multicoloured LED and by integral
signal outputs. The manual ON/OFF switch on the device itself allows
start-up of certain individual load circuits and reset after disconnection on grounds of overcurrent.
As soon as the ESS31-T detects an overload or short circuit in its
load circuit, it blocks the load output transistor and disconnects the
current flow in the faulty circuit. After remedy of the failure, the load
output of the ESS31-T is re-activated manually by actuating the ON/
OFF switch of the device.
US patent number: US 6,490,141 B2
US patent number: US 8,237,311 B2
Features and Benefits
lSelective
load protection with physical isolation
in the event of a failure
lAll types of loads can be connected
(DC 24 V motors upon request)
lActive current limitation when switching on capacitive loads
up to 40,000 µF and in case of overload/short circuit
l Fixed current ratings from 0.5 A to 12 A
lReliable overload disconnection typically from 1.2 x IN even with
long load lines or small cable cross sections
l Manuel ON/OFF switch (push-push actuation)
l Clear status indication by means of LED
l Integral fail-safe element, adjusted to current rating
l Width per channel only 12.5 mm
l For direct rail mounting
l Ease of wiring via entry line busbars LINE+ and 0 V
Approvals ESS31-TC
Approval
authority
Standard
Rated voltage
Current ratings
VDE
EN 60934
DC 30 V
0.5 A…12 A
UL
UL 1077
DC 30 V
0.5 A…12 A
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ESS31-T
Technical data (Tamb = 25 °C, UB = DC – 24 V)
Operating data
Operating voltage UB
DC 24 V (18...30 V)
Current ratings IN
fixed rating:
Types ESS31-TC-…:
0.5 A, 1 A, 2 A, 3 A, 3.6 A, 4 A,
6 A, 8 A, 10 A, 12 A
Standby current I0
in ON condition: typically 8 mA
depending on the
signal output
Trip current (bimetal)
typically 0.4 A
(only in the event of a failure, until physical
disconnection)
l multicoloured LED:
Visual status
indication
Green:
- device is ON (S1 = ON)
load circuit connected
Orange:
- overload or short circuit until
electronic disconnection
Red:
-device switched OFF electronically
load circuit OFF
- undervoltage (UB < 8 V)
OFF:
- manually OFF (S1 = OFF)
load circuit physically isolated
or device is dead-voltage
4
l Potential-free signal contact
l On/off position of the switch S1
Load circuit
Load output power MOSFET switching output
(plus switching)
Overload and short typically 1.2 x IN
circuit disconnection with active current limitation
Trip times for see time/current characteristic
electronic disconnection overload trip time typically 500 ms
short circuit trip time depending on
current rating (see table 1)
for physical isolation typically 5 s
Temperature disconnectioninternal temperature monitoring
with physical isolation
Undervoltage
with hysteresis, no reset required:
monitoring »OFF« at UB < 14 V
of load output »ON« at UB > 17 V
Switch-on delay tStarttypically 2 ms after each ON operation,
reset and after applying of UB
Capacitive loadsup to 40,000 µF
Free-wheeling diodeexternal free-wheeling diode
recommended for inductive load
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Electronic circuit breaker ESS31-T...-DC 24 V
Technical data (Tamb = 25 °C, UB = DC – 24 V)
Parallel connection of
several load outputs
4
not allowed
Signal output
ESS31-TC-001/-002
Electrical datapotential-free auxiliary contact
max. DC 30 V / 2 A min. DC 12 V / 10 mA
Standard condition
UB is applied and switch S1 is ON and
LED green overload,
no short circuit
OFF condition LED off
device switched off (switch S1 is OFF)
load circuit physically isolated
no operating voltage UB
Fault condition LED orangeoverload conditoins > 1.2 times rated
current until electronic disconnection
Fault condition LED redelectronic disconnection upon overload,
short circuit or undervoltage
ESS31-TC-001
single signal, make contact
contact open, terminal 13-14
ESS31-TC-002
single signal, break contact
contact closed, terminal 11-12
General data
Fail-safe elementback-up fuse for ESS31-T.. not required
due to integral redundant fail-safe element (protective element)
Terminals
LINE+ / LOAD+ / 0V
- Screw terminals max. cable cross section
M4
- flexible with wire end ferrule w/wo plastic sleeve 0.5 – 10 mm2
- multi-lead connection (2 identical cables)
rigid / flexible
0.5 – 4 mm2
- flexible with wire end ferrule without plastic sleeve 0.5 – 2.5 mm2
- flexible with TWIN wire end ferrule
with plastic sleeve 0.5 – 6 mm2
- wire stripping length
10 mm
- tightening torque (EN 60934)
1.5 – 1.8 Nm
Terminals
aux. contacts
- Screw terminals
M3
- max. cable cross section
- flexible with wire end ferrule w/wo plastic sleeve 0.25 – 2.5 mm2
- wire stripping length 8 mm
- tightening torque (EN 60934) 0.5 – 0.6 Nm
Housing material
moulded
Mounting
symmetrical rail to EN 50022-35 x 7.5
Ambient temperature0...+50 °C (without condensation,
cf. EN 60204-1)
Storage temperature
-20...+70 °C
Humidity
96 hrs / 95% RH 40 °C
to IEC 60068-2-78-Cab
climate class 3K3 to EN 60721
Vibration
3 g test to IEC 60068-2-6, test Fc ,
Protection class
housing IP20 EN 60529
terminals IP20 EN 60529
EMC requirements
emission: EN 61000-6-3
(EMC directive, CE logo) susceptibility: EN 61000-6-2
Insulation co-ordination 0.5 kV / pollution degree 2
(IEC 60934)
reinforced insulation in operating area
Dielectric strength
max. DC 30 V (load circuit)
Insulation resistance
> 100 MΩ (DC 500 V) between
(OFF condition) LINE (+) and LOAD (+)
Dimensions (w x h x d)12.5 x 80 x 83 mm (tolerances to
DIN ISO 286 part 1 IT13)
Mass
approx. 70 g
2
Order numbering code
Type No.
ESS31 Electronic Circuit Breaker, with current limitation
Mounting
TCrail mounting, with auxiliary contact
Version
0 with physical isolation in the event of a failure
Signal input
0 without signal input
Signal output
1auxiliary make contact
(min. 12 V/10 mA; max. 30 V/2 A)
2auxiliary break contact
(min. 12 V/10 mA; max. 30 V/2 A)
Operating voltage
DC 24 V voltage rating DC 24 V
Current rating
0.5 A
1A
2A
3A
3.6 A Class 2
4A
6A
8A
10 A
12 A
ESS31 - TC - 0
0 1 - DC 24 V - 6 A ordering example
Application note
l The
l
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user has to ensure that the cable cross section of the load circuit
in question complies with the current rating of the ESS31-T used.
In addition special precautions must be taken in the system or
machine (e.g. use of a safety PLC) which reliably prevent an
automatic re-start of parts of the system (cf. Machinery Directive
2006/42/EG and EN 60204-1, Safety of Machinery). In the event
of a failure (short circuit/overload) the load circuit will be disconnected electronically with physical isolation of the contacts by the
ESS31-T.
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Electronic circuit breaker ESS31-T...-DC 24 V
Table 1: Voltage drop, current limitation, trip times, fail-safe element, max. load current
current rating
IN
typical voltage
drop UON at IN
active current
limitation
typically
trip
time
ISC
typically 1)
trip
time
IOL
typically 2)
fail-safe
element
max. load current at
100 % ON duty
TAMB = 40
°C
TAMB = 50
°C
0.5 A
90 mV
1,2 x IN
500 ms
500 ms
2A
0.5 A
0.5 A
1A
100 mV
1,2 x IN
500 ms
500 ms
2A
1A
1A
2A
110 mV
1,2 x IN
500 ms
500 ms
4A
2A
2A
3A
150 mV
1,2 x IN
500 ms
500 ms
6.3 A
3A
3A
3.6 A
155 mV
1,2 x IN
350 ms
500 ms
6.3 A
3.6 A
3.6 A
4A
160 mV
1.2 x IN
280 ms
500 ms
6.3 A
4A
4A
6A
170 mV
1,2 x IN
150 ms
500 ms
10 A
6A
5A
8A
190 mV
1.2 x IN
280 ms
500 ms
15 A
8A
7A
10 A
210 mV
1.2 x IN
200 ms
500 ms
15 A
10 A
9A
12 A
220 mV
1.2 x IN
110 ms
500 ms
20 A
12 A
10.8 A
Note: W
hen mounted side-by-side without convection the devices can only carry max. 80 % of their rated current continuously
(100 % ON duty) due to thermal effect.
1) short circuit
2) overload
Effect of the ambient temperature
on the tripping characteristics
ambient temperature T [°C]
temperature factor
0
+10
+23
+30
+40
+50
0.88
0.93
1.0
1.04
1.12
1.22
4
Table 2: ESS31-T.. - versions
Version
Signal input
Signal output:
Signal output F (signal contact)
ESS31-...
without
without
→
control input reset input
ON/OFF +24 V
+24 V
Control IN+
RE
-TC
-001
X
-TC
-002
X
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single signal single signal
make con- break contact
tact
(normally
(normally
open NO) closed NC)
X
without
status
OUT
+24 V = OK
status
OUT
0 V = OK
X
X
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Status output SF
X
3
Electronic circuit breaker ESS31-T...-DC 24 V
Schematic diagram ESS31-T
Wiring diagram ESS31-TC-001-... (Example)
Example ESS31-TC-001
LINE + 1
ON / OFF
activation
operating condition
green / orange / red
14
13
LOAD (+)
load output
13
14
DC 24V
xxA
14
XXXX
Y
N
A
M
R
E
G
Electronic Circuit Breaker
ESS31-TC-001-DC24V-xxA
Rsense
electronic control unit
Short circuit/ current
overload
measurement
fail-safe
Line (+)
DC 24 V
13
I>
2 LOAD +
0V
3
2 LOAD+
GND (-)
Dimensions of the ESS31-TC version
89,5 OFF
83,5 ON
operating
area
installation area
12,5
G
E
R
M
80
A
N
Y
4
80
Phoenix label
ZBF-12
4
snap-on socket for
symmetrical rail
EN50022-35X7.5
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Electronic circuit breaker ESS31-T...-DC 24 V
ESS31-T Signal inputs / outputs (wiring diagrams)
The auxiliary contacts are shown in OFF or fault condition
ESS31-TC-001-.....
ESS31-TC-002-.....
without signal input
with signal output f
single singnal, make contact
without signal input
with signal output f
single singnal, break contact
LINE + 1
LINE + 1
12
14
11
13
I>
2 LOAD +
I>
2 LOAD +
0V
0V
3
3
operating condition
11-12 open
fault condition
11-12 closed
operating condition
13-14 closed
fault condition
13-14 open
Typical time/current characteristic (Tamb = 25 °C)
min. 1.05 x IN max. 1.35 x IN
trip time in seconds
10000
l The overload trip time is typically 500 ms (e.g. ESS31-T-…-6 A)
lThe electronic current limitation typically begiins in at 1.2 x IN
1000
This means: under all overload conditions (independent of power
supply and load circuit resistance) typically 1.2 times rated current
is applied until disconnection. The corresponding current limitation
value ILimit depends on the current rating of the device IN.
100
10
l
1
0,5
0,1
0,01
Without the current limitation getting into effect at typically 1.2 x IN
there would be a much higher overcurrent in the event of an overload or short circuit.
l
Reset
0
trip time depends
on rated current
(see table 1)
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4
1
2
disconnection and
current limitation
typically 1.2 x IN
4
3
...times rated current
5 IK
of the circuit breaker is only possible approximately 10 sec
after tripping.
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Electronic circuit breaker ESS31-T...-DC 24 V
Mounting examples for ESS31-T
The ESS31-T features an integral power distribution system
continuous busbar (12,5 x n) - 3 = length of busbars +/- 0,5
e.g. (12,5 x 5) -3 = 59,5 +/- 0,5
(500 mm length) cut
E
R
M
A
N
Y
Line + busbars
X222611 grey
G
remove protection
against brush contact
from bottom side
insert protection against
brush contact
0 V busbars
X222611 grey
(12,5 x n) = width of protector block
e.g. 12,5 x 5 = 62,5
G
E
R
M
A
N
Y
insert busbars and protection slides
to be flush with housing sides
4
ESS31-TC
with busbars
Description of installation:
With a block of devices the busbars have to be inserted before wiring.
Max. 10 plug-in cycles for busbars allowed.
Recommendation:
The line entry busbars and signal busbars should be interrupted after 10 devices and line entry should start anew.
Table of possible busbar lengths
6
Number of devices
2
3
4
5
6
7
8
9
10
length of busbar [mm]
±0.5mm
22
34.5
47
59.5
72
84.5
97
109.5
122
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Electronic circuit breaker ESS31-T...-DC 24 V
Description
The ESS31-T has an integral power distribution system. The following
wirings can be carried out with different plug-in type busbars:
l
l
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.
LINE +(DC 24 V)
0V
Important: The electronic devices ESS31-T require a 0 V
connection.
Accessories / Technical data
Busbars for LINE and 0 V
ampacity with one input
(recommendation: central supply)
ampacity with two inputs
grey insulated, length: 500 mm
X 222 611 02
Imax 50 A
Imax 63 A
Insulated wire bridge (for aux. contact)
optional as jumper for group signalling
(series connection of make contacts 13 - 14)
X 223 108 01
Packaging unit: 10 pcs
7,5
4
X 222 611 34
(block of 3 ESS31-Ts), length: 34.5 mm
Packaging unit: 10 pcs
X 222 611 47
(block of 4 ESS31-Ts), length: 47 mm
Packaging unit: 10 pcs
X 222 611 59
(block of 5 ESS31-Ts), length: 59.5 mm
Packaging unit: 10 pcs
X 222 611 72
(block of 6 ESS31-Ts), length: 72 mm
Packaging unit: 4 pcs
Passive supply module for LINE+ and 0 V
(without protection)
optional for all types ESS31-T versions allowing to
connect the loads in question to all ESS31-T.
Ampacity
Max. cable cross section
Ima 50 A
0.5 - 10 mm2
Technical Data
see terminals of ESS31-T
AD-TX-EM01
X 222 611 97
(block of 8 ESS31-Ts), length: 97 mm
Packaging unit: 4 pcs
G
E
R
M
A
N
Y
X 222 611 12
(block of 10 ESS31-Ts), length: 122 mm
Packaging unit: 4 pcs
Einspeisemodul
Supply Module
AD-TX-EM01
LINE+
1
max. 50 A
X 222 611 22
(block of 2 ESS31-Ts), length: 22 mm
Packaging unit: 10 pcs
ø2.5
.099
50 pin lugs to
DIN 46230
tinned copper
~70
~2.76
Busbars for LINE and 0 V
grey insulated
max. 10 plug-in cycles allowed
Connector bus link –K10
suitable for auxiliary contacts (series connection)
X 210 589 02 (1.5 mm2, brown),
AD-TXEM01
0V
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3
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Electronic circuit breaker ESS31-T...-DC 24 V
4
8
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